目录
applicationContext-mybatis.xml
2.1 在springmv.xml中添加 多功能解析器 配置
2.2 前台的页面 添加 多功能表单设置 multipart/form-data
2.3 后台要利用multipartFile类进行 文件接收
本次目标:
一、CRUD
(springmvc的增删改查: 自定义mvc)
1.导pom依赖(记得导这个之前先联网!!)
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>ssm2</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>ssm2 Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
<!--添加jar包依赖-->
<!--1.spring 5.0.2.RELEASE相关-->
<spring.version>5.0.2.RELEASE</spring.version>
<!--2.mybatis相关-->
<mybatis.version>3.4.5</mybatis.version>
<!--MysqL-->
<MysqL.version>5.1.44</MysqL.version>
<!--pageHelper分页jar依赖-->
<pageHelper.version>5.1.2</pageHelper.version>
<!--mybatis与spring集成jar依赖-->
<mybatis.spring.version>1.3.1</mybatis.spring.version>
<!--3.dbcp2连接池相关 druid-->
<commons.dbcp2.version>2.1.1</commons.dbcp2.version>
<commons.pool2.version>2.4.3</commons.pool2.version>
<!--4.log日志相关-->
<log4j2.version>2.9.1</log4j2.version>
<!--5.其他-->
<junit.version>4.12</junit.version>
<servlet.version>4.0.0</servlet.version>
<lombok.version>1.18.2</lombok.version>
</properties>
<dependencies>
<!--1.spring相关-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--2.mybatis相关-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--MysqL-->
<dependency>
<groupId>MysqL</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${MysqL.version}</version>
</dependency>
<!--pageHelper分页插件jar包依赖-->
<dependency>
<groupId>com.github.pageHelper</groupId>
<artifactId>pageHelper</artifactId>
<version>${pageHelper.version}</version>
</dependency>
<!--mybatis与spring集成jar包依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!--3.dbcp2连接池相关-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>${commons.dbcp2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>${commons.pool2.version}</version>
</dependency>
<!--4.log日志相关依赖-->
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--web工程需要包含log4j-web,非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--5.其他-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- jsp依赖-->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
</dependencies>
<build>
<finalName>ssm2</finalName>
<resources>
<!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
<resource>
<directory>src/main/resources</directory>
<includes>
<include>jdbc.properties</include>
<include>*.xml</include>
</includes>
</resource>
</resources>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven.compiler.plugin.version}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<!--使用mybatis-generator插件不能使用太高版本的MysqL驱动 -->
<dependency>
<groupId>MysqL</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${MysqL.version}</version>
</dependency>
</dependencies>
<configuration>
<overwrite>true</overwrite>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
导完后会有这个:(点左边那个 Import Changes)
等他下载完jar包就行
2.框架配置文件
- applicationContext.xml
- applicationContext-mybatis.xml
- generatorConfig.xml
- jdbc.properties
- log4j2.xml
- mybatis.cfg.xml
- springmvc-servlet.xml
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<import resource="applicationContext-mybatis.xml"></import>
</beans>
applicationContext-mybatis.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--1. 注解式开发 -->
<!-- 注解驱动 -->
<context:annotation-config/>
<!-- 用注解方式注入bean,并指定查找范围:com.javaxl.ssm及子子孙孙包-->
<context:component-scan base-package="com.ps.ssm"/>
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!--初始连接数-->
<property name="initialSize" value="10"/>
<!--最大活动连接数-->
<property name="maxTotal" value="100"/>
<!--最大空闲连接数-->
<property name="maxIdle" value="50"/>
<!--最小空闲连接数-->
<property name="minIdle" value="10"/>
<!--设置为-1时,如果没有可用连接,连接池会一直无限期等待,直到获取到连接为止。-->
<!--如果设置为N(毫秒),则连接池会等待N毫秒,等待不到,则抛出异常-->
<property name="maxWaitMillis" value="-1"/>
</bean>
<!--4. spring和MyBatis整合 -->
<!--1) 创建sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.sqlSessionfactorybean">
<!-- 指定数据源 -->
<property name="dataSource" ref="dataSource"/>
<!-- 自动扫描XxxMapping.xml文件,**任意路径 -->
<property name="mapperLocations" value="classpath*:com/ps/ssm/**/mapper/*.xml"/>
<!-- 指定别名 -->
<property name="typeAliasesPackage" value="com/ps/ssm/**/model"/>
<!--配置pageHelper插件-->
<property name="plugins">
<array>
<bean class="com.github.pageHelper.PageInterceptor">
<property name="properties">
<value>
helperDialect=MysqL
</value>
</property>
</bean>
</array>
</property>
</bean>
<!--2) 自动扫描com/ps/ssm/**/mapper下的所有XxxMapper接口(其实就是DAO接口),并实现这些接口,-->
<!-- 即可直接在程序中使用dao接口,不用再获取sqlsession对象-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--basePackage 属性是映射器接口文件的包路径。-->
<!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径-->
<property name="basePackage" value="com/ps/ssm/**/mapper"/>
<property name="sqlSessionfactorybeanName" value="sqlSessionFactory"/>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<aop:aspectj-autoproxy/>
</beans>
generatorConfig.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
<!-- 引入配置文件 -->
<properties resource="jdbc.properties"/>
<!--指定数据库jdbc驱动jar包的位置-->
<classpathEntry location="D:\\maven\\mvn_repository\\MysqL\\mysql-connector-java\\5.1.44\\mysql-connector-java-5.1.44.jar"/>
<!-- 一个数据库一个context -->
<context id="infoGuardian">
<!-- 注释 -->
<commentGenerator>
<property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
<property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
</commentGenerator>
<!-- jdbc连接 -->
<jdbcConnection driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>
<!-- 类型转换 -->
<javaTypeResolver>
<!-- 是否使用bigDecimal, false可自动转化以下类型(Long, Integer, Short, etc.) -->
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 01 指定javaBean生成的位置 -->
<!-- targetPackage:指定生成的model生成所在的包名 -->
<!-- targetProject:指定在该项目下所在的路径 -->
<javaModelGenerator targetPackage="com.ps.ssm.model"
targetProject="src/main/java">
<!-- 是否允许子包,即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
<!-- 是否对model添加构造函数 -->
<property name="constructorBased" value="true"/>
<!-- 是否针对string类型的字段在set的时候进行trim调用 -->
<property name="trimstrings" value="false"/>
<!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法,只有构造方法 -->
<property name="immutable" value="false"/>
</javaModelGenerator>
<!-- 02 指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.ps.ssm.mapper"
targetProject="src/main/java">
<!-- 是否允许子包,即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!-- 03 生成XxxMapper接口 -->
<!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 -->
<!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 -->
<!-- type="XMLMAPPER",生成sqlMap XML文件和独立的Mapper接口 -->
<javaClientGenerator targetPackage="com.ps.ssm.mapper"
targetProject="src/main/java" type="XMLMAPPER">
<!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model, true:com.oop.eksp.user.model.[schemaName] -->
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>
<!-- 配置表信息 -->
<!-- schema即为数据库名 -->
<!-- tableName为对应的数据库表 -->
<!-- domainObjectName是要生成的实体类 -->
<!-- enable*ByExample是否生成 example类 -->
<!--<table schema="" tableName="t_book" domainObjectName="Book"-->
<!--enableCountByExample="false" enableDeleteByExample="false"-->
<!--enableSelectByExample="false" enableupdateByExample="false">-->
<!--<!– 忽略列,不生成bean 字段 –>-->
<!--<!– <ignoreColumn column="FRED" /> –>-->
<!--<!– 指定列的java数据类型 –>-->
<!--<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>-->
<!--</table>-->
<table schema="" tableName="t_struts_class" domainObjectName="Clazz"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableupdateByExample="false">
</table>
</context>
</generatorConfiguration>
jdbc.properties
jdbc.driver=com.MysqL.jdbc.Driver
jdbc.url=jdbc:MysqL://localhost:3306/mybatis?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456
log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<!-- status : 指定log4j本身的打印日志的级别.ALL< Trace < DEBUG < INFO < WARN < ERROR
< FATAL < OFF。 monitorInterval : 用于指定log4j自动重新配置的监测间隔时间,单位是s,最小是5s. -->
<Configuration status="WARN" monitorInterval="30">
<Properties>
<!-- 配置日志文件输出目录 ${sys:user.home} -->
<Property name="LOG_HOME">/root/workspace/lucenedemo/logs</Property>
<property name="ERROR_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/error</property>
<property name="WARN_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/warn</property>
<property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%n</property>
</Properties>
<Appenders>
<!--这个输出控制台的配置 -->
<Console name="Console" target="SYstem_OUT">
<!-- 控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) -->
<ThresholdFilter level="trace" onMatch="ACCEPT"
onMismatch="DENY" />
<!-- 输出日志的格式 -->
<!-- %d{yyyy-MM-dd HH:mm:ss, SSS} : 日志生产时间 %p : 日志输出格式 %c : logger的名称
%m : 日志内容,即 logger.info("message") %n : 换行符 %C : java类名 %L : 日志输出所在行数 %M
: 日志输出所在方法名 hostName : 本地机器名 hostAddress : 本地ip地址 -->
<PatternLayout pattern="${PATTERN}" />
</Console>
<!--文件会打印出所有信息,这个log每次运行程序会自动清空,由append属性决定,这个也挺有用的,适合临时测试用 -->
<!--append为TRUE表示消息增加到指定文件中,false表示消息覆盖指定的文件内容,默认值是true -->
<File name="log" fileName="logs/test.log" append="false">
<PatternLayout
pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
</File>
<!-- 这个会打印出所有的info及以下级别的信息,每次大小超过size, 则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩,作为存档 -->
<RollingFile name="RollingFileInfo" fileName="${LOG_HOME}/info.log"
filePattern="${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
<!--控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) -->
<ThresholdFilter level="info" onMatch="ACCEPT"
onMismatch="DENY" />
<PatternLayout
pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
<Policies>
<!-- 基于时间的滚动策略,interval属性用来指定多久滚动一次,默认是1 hour。 modulate=true用来调整时间:比如现在是早上3am,interval是4,那么第一次滚动是在4am,接着是8am,12am...而不是7am. -->
<!-- 关键点在于 filePattern后的日期格式,以及TimeBasedTriggeringPolicy的interval, 日期格式精确到哪一位,interval也精确到哪一个单位 -->
<!-- log4j2的按天分日志文件 : info-%d{yyyy-MM-dd}-%i.log -->
<TimeBasedTriggeringPolicy interval="1"
modulate="true" />
<!-- SizeBasedTriggeringPolicy:Policies子节点, 基于指定文件大小的滚动策略,size属性用来定义每个日志文件的大小. -->
<!-- <SizeBasedTriggeringPolicy size="2 kB" /> -->
</Policies>
</RollingFile>
<RollingFile name="RollingFileWarn" fileName="${WARN_LOG_FILE_NAME}/warn.log"
filePattern="${WARN_LOG_FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
<ThresholdFilter level="warn" onMatch="ACCEPT"
onMismatch="DENY" />
<PatternLayout
pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="2 kB" />
</Policies>
<!-- DefaultRolloverStrategy属性如不设置,则默认为最多同一文件夹下7个文件,这里设置了20 -->
<DefaultRolloverStrategy max="20" />
</RollingFile>
<RollingFile name="RollingFileError" fileName="${ERROR_LOG_FILE_NAME}/error.log"
filePattern="${ERROR_LOG_FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd-HH-mm}-%i.log">
<ThresholdFilter level="error" onMatch="ACCEPT"
onMismatch="DENY" />
<PatternLayout
pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
<Policies>
<!-- log4j2的按分钟 分日志文件 : warn-%d{yyyy-MM-dd-HH-mm}-%i.log -->
<TimeBasedTriggeringPolicy interval="1"
modulate="true" />
<!-- <SizeBasedTriggeringPolicy size="10 MB" /> -->
</Policies>
</RollingFile>
</Appenders>
<!--然后定义logger,只有定义了logger并引入的appender,appender才会生效 -->
<Loggers>
<!--过滤掉spring和mybatis的一些无用的DEBUG信息 -->
<logger name="org.springframework" level="INFO"></logger>
<logger name="org.mybatis" level="INFO"></logger>
<!-- 第三方日志系统 -->
<logger name="org.springframework" level="ERROR" />
<logger name="org.hibernate" level="ERROR" />
<logger name="org.apache.struts2" level="ERROR" />
<logger name="com.opensymphony.xwork2" level="ERROR" />
<logger name="org.jboss" level="ERROR" />
<!-- 配置日志的根节点 -->
<root level="all">
<appender-ref ref="Console" />
<appender-ref ref="RollingFileInfo" />
<appender-ref ref="RollingFileWarn" />
<appender-ref ref="RollingFileError" />
</root>
</Loggers>
</Configuration>
springmvc-servlet.xml
(这个配置文件要在WEB-INF目录下)
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 通过context:component-scan元素扫描指定包下的控制器-->
<!--1) 扫描com.javaxl.zf及子子孙孙包下的控制器(扫描范围过大,耗时)-->
<aop:aspectj-autoproxy/>
<context:component-scan base-package="com.ps.ssm"/>
<!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter -->
<!--两个bean,这两个bean是spring MVC为@Controllers分发请求所必须的。并提供了数据绑定支持,-->
<!--@NumberFormatannotation支持,@DateTimeFormat支持,@Valid支持,读写XML的支持(JAXB),读写JSON的支持(Jackson)-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--3) ViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- viewClass需要在pom中引入两个包:standard.jar and jstl.jar -->
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--4) 单独处理图片、样式、js等资源 -->
<!--<mvc:resources location="/css/" mapping="/css/**"/>-->
<mvc:resources location="/images/" mapping="/images/**"/>
<!--<mvc:resources location="/js/" mapping="/js/**"/>-->
</beans>
3.Web.xml:
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<display-name>Archetype Created Web Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 读取Spring上下文的监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring MVC servlet -->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.dispatcherServlet</servlet-class>
<!--此参数可以不配置,默认值为:/WEB-INF/springmvc-servlet.xml-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springmvc-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<!--web.xml 3.0的新特性,是否支持异步-->
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 中文乱码处理 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!--web.xml 3.0的新特性,是否支持异步-->
<async-supported>true</async-supported>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
4.导入工具类 Pagebean,tag助手类,tid文件
pageBean:
package com.ps.ssm.util;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
/**
* 分页工具类
*
*/
public class PageBean {
private int page = 1;// 页码
private int rows = 10;// 页大小
private int total = 0;// 总记录数
private boolean pagination = true;// 是否分页
private String url; //保存上一次请求的URL
private Map<String,String[]> paramMap = new HashMap<>();// 保存上一次请求的参数
/**
* 初始化pagebean的,保存上一次请求的重要参数
* @param req
*/
public void setRequest(HttpServletRequest req) {
// 1.1 需要保存上一次请求的URL
this.setUrl(req.getRequestURL().toString());
// 1.2 需要保存上一次请求的参数 bname、price
this.setParamMap(req.getParameterMap());
// 1.3 需要保存上一次请求的分页设置 pagination
this.setPagination(req.getParameter("pagination"));
// 1.4 需要保存上一次请求的展示条目数
this.setRows(req.getParameter("rows"));
// 1.5 初始化请求的页码 page
this.setPage(req.getParameter("page"));
}
public void setPage(String page) {
if(StringUtils.isNotBlank(page))
this.setPage(Integer.valueOf(page));
}
public void setRows(String rows) {
if(StringUtils.isNotBlank(rows))
this.setRows(Integer.valueOf(rows));
}
public void setPagination(String pagination) {
// 只有在前台jsp填写了pagination=false,才代表不分页
if(StringUtils.isNotBlank(pagination))
this.setPagination(!"false".equals(pagination));
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public Map<String, String[]> getParamMap() {
return paramMap;
}
public void setParamMap(Map<String, String[]> paramMap) {
this.paramMap = paramMap;
}
public PageBean() {
super();
}
public int getPage() {
return page;
}
public void setPage(int page) {
this.page = page;
}
public int getRows() {
return rows;
}
public void setRows(int rows) {
this.rows = rows;
}
public int getTotal() {
return total;
}
public void setTotal(int total) {
this.total = total;
}
public void setTotal(String total) {
this.total = Integer.parseInt(total);
}
public boolean isPagination() {
return pagination;
}
public void setPagination(boolean pagination) {
this.pagination = pagination;
}
/**
* 获得起始记录的下标
*
* @return
*/
public int getStartIndex() {
return (this.page - 1) * this.rows;
}
/**
* 最大页
* @return
*/
public int maxPage() {
// total % rows == 0 ? total / rows : total / rows +1
return this.total % this.rows == 0 ? this.total / this.rows : this.total / this.rows + 1;
}
/**
* 下一页
* @return
*/
public int nextPage() {
// 如果当前页小于最大页,那就下一页为当前页+1;如果不小于,说明当前页就是最大页,那就无需+1
return this.page < this.maxPage() ? this.page + 1 : this.page;
}
/**
* 上一页
* @return
*/
public int prevIoUsPage() {
return this.page > 1 ? this.page - 1 : this.page;
}
@Override
public String toString() {
return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", pagination=" + pagination + "]";
}
}
助手类:
PageTag:
package com.ps.ssm.tag;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyTagSupport;
import com.ps.ssm.util.PageBean;
public class PageTag extends BodyTagSupport{
private PageBean pageBean;// 包含了所有分页相关的元素
public PageBean getPageBean() {
return pageBean;
}
public void setPageBean(PageBean pageBean) {
this.pageBean = pageBean;
}
@Override
public int doStartTag() throws JspException {
// 没有标签体,要输出内容
JspWriter out = pageContext.getout();
try {
out.print(toHTML());
} catch (IOException e) {
e.printstacktrace();
}
return super.doStartTag();
}
private String toHTML() {
StringBuffer sb = new StringBuffer();
// 隐藏的form表单---这个就是上一次请求下次重新发的奥义所在
// 上一次请求的URL
sb.append("<form action='"+pageBean.getUrl()+"' id='pageBeanForm' method='post'>");
sb.append(" <input type='hidden' name='page'>");
// 上一次请求的参数
Map<String, String[]> paramMap = pageBean.getParamMap();
if(paramMap != null && paramMap.size() > 0) {
Set<Entry<String, String[]>> entrySet = paramMap.entrySet();
for (Entry<String, String[]> entry : entrySet) {
// 参数名
String key = entry.getKey();
// 参数值
for (String value : entry.getValue()) {
// 上一次请求的参数,再一次组装成了新的Form表单
// 注意:page参数每次都会提交,我们需要避免
if(!"page".equals(key)) {
sb.append(" <input type='hidden' name='"+key+"' value='"+value+"' >");
}
}
}
}
sb.append("</form>");
// 分页条
sb.append("<ul class='pagination justify-content-center'>");
sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'");
sb.append(" href='javascript:gotoPage(1)'>首页</a></li>");
sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'");
sb.append(" href='javascript:gotoPage("+pageBean.prevIoUsPage()+")'><</a></li>");// less than 小于号
// sb.append(" <li class='page-item'><a class='page-link' href='#'>1</a></li>");
// sb.append(" <li class='page-item'><a class='page-link' href='#'>2</a></li>");
sb.append(" <li class='page-item active'><a class='page-link' href='#'>"+pageBean.getPage()+"</a></li>");
sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.maxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.nextPage()+")'>></a></li>");
sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.maxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.maxPage()+")'>尾页</a></li>");
sb.append(" <li class='page-item go-input'><b>到第</b><input class='page-link'");
sb.append(" type='text' id='skipPage' name='' /><b>页</b></li>");
sb.append(" <li class='page-item go'><a class='page-link'");
sb.append(" href='javascript:skipPage()'>确定</a></li>");
sb.append(" <li class='page-item'><b>共"+pageBean.getTotal()+"条</b></li>");
sb.append("</ul>");
// 分页执行的JS代码
sb.append("<script type='text/javascript'>");
sb.append(" function gotoPage(page) {");
sb.append(" document.getElementById('pageBeanForm').page.value = page;");
sb.append(" document.getElementById('pageBeanForm').submit();");
sb.append(" }");
sb.append(" function skipPage() {");
sb.append(" var page = document.getElementById('skipPage').value;");
sb.append(" if (!page || isNaN(page) || parseInt(page) < 1 || parseInt(page) > "+pageBean.maxPage()+") {");
sb.append(" alert('请输入1~"+pageBean.maxPage()+"的数字');");
sb.append(" return;");
sb.append(" }");
sb.append(" gotoPage(page);");
sb.append(" }");
sb.append("</script>");
return sb.toString();
}
}
tld文件:zking.tld
<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">
<description>zking 1.1 core library</description>
<display-name>zking core</display-name>
<tlib-version>1.1</tlib-version>
<short-name>zking</short-name>
<uri>http://jsp.veryedu.cn</uri>
<tag>
<name>page</name>
<tag-class>com.ps.ssm.tag.PageTag</tag-class>
<body-content>JSP</body-content>
<attribute>
<name>pageBean</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
</taglib>
5.做开发
将t_struts_class表逆向生成出Model、Mapper.xml、Mapper.java
表:
在generatorConfig.xml配置中添加以下代码:
<table schema="" tableName="t_struts_class" domainObjectName="Clazz"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableupdateByExample="false">
</table>
然后运行即可 ;
这是之前导入的那些环境配置文件:
还有(model、dao、service、前端)
ClazzMapper.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.ps.ssm.mapper.ClazzMapper" >
<resultMap id="BaseResultMap" type="com.ps.ssm.model.Clazz" >
<constructor >
<idArg column="cid" jdbcType="INTEGER" javaType="java.lang.Integer" />
<arg column="cname" jdbcType="VARCHAR" javaType="java.lang.String" />
<arg column="cteacher" jdbcType="VARCHAR" javaType="java.lang.String" />
<arg column="pic" jdbcType="VARCHAR" javaType="java.lang.String" />
</constructor>
</resultMap>
<sql id="Base_Column_List" >
cid, cname, cteacher, pic
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from t_struts_class
where cid = #{cid,jdbcType=INTEGER}
</select>
<select id="listPager" resultType="com.ps.ssm.model.Clazz"
parameterType="com.ps.ssm.model.Clazz" >
select
<include refid="Base_Column_List" />
from t_struts_class
<where>
<if test="cname != null and cname != ''">
and cname like CONCAT('%',#{cname},'%')
</if>
<if test="cid != null and cname != ''">
and cid = #{cid}
</if>
</where>
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from t_struts_class
where cid = #{cid,jdbcType=INTEGER}
</delete>
<insert id="insert" parameterType="com.ps.ssm.model.Clazz" >
insert into t_struts_class (cid, cname, cteacher,
pic)
values (#{cid,jdbcType=INTEGER}, #{cname,jdbcType=VARCHAR}, #{cteacher,jdbcType=VARCHAR},
#{pic,jdbcType=VARCHAR})
</insert>
<insert id="insertSelective" parameterType="com.ps.ssm.model.Clazz" >
insert into t_struts_class
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="cid != null" >
cid,
</if>
<if test="cname != null" >
cname,
</if>
<if test="cteacher != null" >
cteacher,
</if>
<if test="pic != null" >
pic,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="cid != null" >
#{cid,jdbcType=INTEGER},
</if>
<if test="cname != null" >
#{cname,jdbcType=VARCHAR},
</if>
<if test="cteacher != null" >
#{cteacher,jdbcType=VARCHAR},
</if>
<if test="pic != null" >
#{pic,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="com.ps.ssm.model.Clazz" >
update t_struts_class
<set >
<if test="cname != null" >
cname = #{cname,jdbcType=VARCHAR},
</if>
<if test="cteacher != null" >
cteacher = #{cteacher,jdbcType=VARCHAR},
</if>
<if test="pic != null" >
pic = #{pic,jdbcType=VARCHAR},
</if>
</set>
where cid = #{cid,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.ps.ssm.model.Clazz" >
update t_struts_class
set cname = #{cname,jdbcType=VARCHAR},
cteacher = #{cteacher,jdbcType=VARCHAR},
pic = #{pic,jdbcType=VARCHAR}
where cid = #{cid,jdbcType=INTEGER}
</update>
</mapper>
<select id="listPager" resultType="com.ps.ssm.model.clazz" parameterType="com.ps.ssm.model.clazz" >
select
<include refid="Base_Column_List" />
from t_struts_class
<where>
<if test="cname !=null and cname !='' ">
and cname like CONCAT('%','#{cname}','%')
</if>
<if test="cid !=null and cid !='' ">
and cname = #{cid}
</if>
</where>
</select>
ClazzMapper:
package com.ps.ssm.mapper;
import com.ps.ssm.model.Clazz;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public interface ClazzMapper {
int deleteByPrimaryKey(Integer cid);
int insert(Clazz record);
int insertSelective(Clazz record);
Clazz selectByPrimaryKey(Integer cid);
List<Clazz> listPager(Clazz clazz);
int updateByPrimaryKeySelective(Clazz record);
int updateByPrimaryKey(Clazz record);
}
biz层
package com.ps.ssm.biz;
import com.ps.ssm.model.Clazz;
import com.ps.ssm.util.PageBean;
import java.util.List;
public interface ClazzBiz {
int deleteByPrimaryKey(Integer cid);
int insert(Clazz record);
int insertSelective(Clazz record);
Clazz selectByPrimaryKey(Integer cid);
int updateByPrimaryKeySelective(Clazz record);
int updateByPrimaryKey(Clazz record);
List<Clazz> listPager(Clazz clazz, PageBean pageBean);
}
实现类
package com.ps.ssm.impl;
import com.ps.ssm.biz.ClazzBiz;
import com.ps.ssm.mapper.ClazzMapper;
import com.ps.ssm.model.Clazz;
import com.ps.ssm.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @author 彭于晏
* @company 玉渊工作室
* @create 2022-08-19 00:42
*/
@Service
public class ClassBizImpl implements ClazzBiz {
@Autowired
private ClazzMapper clazzMapper;
@Override
public int deleteByPrimaryKey(Integer cid) {
return clazzMapper.deleteByPrimaryKey(cid);
}
@Override
public int insert(Clazz record) {
return clazzMapper.insertSelective(record);
}
@Override
public int insertSelective(Clazz record) {
return clazzMapper.insertSelective(record);
}
@Override
public Clazz selectByPrimaryKey(Integer cid) {
return clazzMapper.selectByPrimaryKey(cid);
}
@Override
public int updateByPrimaryKeySelective(Clazz record) {
return clazzMapper.updateByPrimaryKeySelective(record);
}
@Override
public int updateByPrimaryKey(Clazz record) {
return clazzMapper.updateByPrimaryKey(record);
}
@Override
public List<Clazz> listPager(Clazz clazz, PageBean pageBean) {
return clazzMapper.listPager(clazz);
}
}
切面类:
package com.ps.ssm.aspect;
import com.github.pageHelper.pageHelper;
import com.github.pageHelper.PageInfo;
import com.ps.ssm.util.PageBean;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
import java.util.List;
/**
* @author 彭于晏
* @company 玉渊工作室
* @create 2022-08-15 16:32
*/
@Component
@Aspect
public class PagerAspect {
/**
* *:返回值类型
* *..:无限包
* *Biz:以Biz结尾的接口名
* *Pager:以Pager方法
* 只要同时匹配上诉四个条件就会被列为目标对象
* 上诉配置要生效,代理注释一定要打开:<aop:aspectj-autoproxy/>
* @param args
* @return
* @throws Throwable
*/
@Around("execution(* *..*Biz.*Pager(..))")
public Object invoke(ProceedingJoinPoint args) throws Throwable {
Object[] params = args.getArgs();
PageBean pageBean = null;
for (Object param : params) {
if(param instanceof PageBean){
pageBean = (PageBean)param;
break;
}
}
if(pageBean != null && pageBean.isPagination())
pageHelper.startPage(pageBean.getPage(),pageBean.getRows());
//执行目标
Object list = args.proceed(params);
if(null != pageBean && pageBean.isPagination()){
PageInfo pageInfo = new PageInfo((List) list);
pageBean.setTotal(pageInfo.getTotal()+"");
}
return list;
}
}
实体类:
package com.ps.ssm.model;
public class Clazz {
protected Integer cid;
protected String cname;
protected String cteacher;
protected String pic;
public Clazz(Integer cid, String cname, String cteacher, String pic) {
this.cid = cid;
this.cname = cname;
this.cteacher = cteacher;
this.pic = pic;
}
public Clazz() {
super();
}
public Integer getCid() {
return cid;
}
public void setCid(Integer cid) {
this.cid = cid;
}
public String getCname() {
return cname;
}
public void setCname(String cname) {
this.cname = cname;
}
public String getCteacher() {
return cteacher;
}
public void setCteacher(String cteacher) {
this.cteacher = cteacher;
}
public String getPic() {
return pic;
}
public void setPic(String pic) {
this.pic = pic;
}
}
ClazzController:
package com.ps.ssm.controller;
import com.ps.ssm.biz.ClazzBiz;
import com.ps.ssm.model.Clazz;
import com.ps.ssm.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
/**
* @author 彭于晏
* @company 玉渊工作室
* @create 2022-08-18 16:23
*/
@Controller
@RequestMapping("/clz")
public class ClazzController {
@Autowired
private ClazzBiz clazzBiz;
@RequestMapping("/list")
public String list(Clazz clazz, HttpServletRequest request){
PageBean pageBean = new PageBean();
pageBean.setRequest(request);
List<Clazz> lst = this.clazzBiz.listPager(clazz, pageBean);
request.setAttribute("lst",lst);
request.setAttribute("pageBean",pageBean);
return "clzList";
}
@RequestMapping("/toEdit")
public String toEdit(Clazz clazz, HttpServletRequest request){
Integer cid = clazz.getCid();
//传递了id代表修改,没传代表新增
if(cid!=null){
List<Clazz> lst = this.clazzBiz.listPager(clazz, null);
request.setAttribute("c",lst.get(0));
}
return "clzList";
}
@RequestMapping("/add")
public String add(Clazz clazz){
this.clazzBiz.insertSelective(clazz);
return "redirect:/clz/list";
}
@RequestMapping("/edit")
public String edit(Clazz clazz){
this.clazzBiz.updateByPrimaryKeySelective(clazz);
return "redirect:/clz/list";
}
@RequestMapping("/del")
public String del(Clazz clazz){
this.clazzBiz.deleteByPrimaryKey(clazz.getCid());
return "redirect:/clz/list";
}
}
前台界面
clzEdit.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<Meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>博客的编辑界面</title>
</head>
<body>
<form action="${pageContext.request.contextpath }/clz/${empty b ? 'add' : 'edit'}" method="post">
cid:<input type="text" name="cid" value="${b.cid }"><br>
cname:<input type="text" name="cname" value="${b.cname }"><br>
cteacher:<input type="text" name="cteacher" value="${b.cteacher }"><br>
<input type="submit">
</form>
</body>
</html>
clzList.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://jsp.veryedu.cn" prefix="z"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<Meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link
href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css"
rel="stylesheet">
<script
src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script>
<title>博客列表</title>
<style type="text/css">
.page-item input {
padding: 0;
width: 40px;
height: 100%;
text-align: center;
margin: 0 6px;
}
.page-item input, .page-item b {
line-height: 38px;
float: left;
font-weight: 400;
}
.page-item.go-input {
margin: 0 10px;
}
</style>
</head>
<body>
<form class="form-inline"
action="${pageContext.request.contextpath }/clz/list" method="post">
<div class="form-group mb-2">
<input type="text" class="form-control-plaintext" name="cname"
placeholder="请输入班级名称">
</div>
<button type="submit" class="btn btn-primary mb-2">查询</button>
<a class="btn btn-primary mb-2" href="${pageContext.request.contextpath }/clz/toEdit">新增</a>
</form>
<table class="table table-striped ">
<thead>
<tr>
<th scope="col">ID</th>
<th scope="col">班级名称</th>
<th scope="col">指导老师</th>
<th scope="col">班级相册</th>
<th scope="col">操作</th>
</tr>
</thead>
<tbody>
<c:forEach var="b" items="${lst }">
<tr>
<td>${b.cid }</td>
<td>${b.cname }</td>
<td>${b.cteacher }</td>
<td>
<img src="${pageContext.request.contextpath }${b.pic }" style="height: 100px;width: 100px">
</td>
<td>
<a href="${pageContext.request.contextpath }/clz/toEdit?cid=${b.cid}">修改</a>
<a href="${pageContext.request.contextpath }/clz/del?cid=${b.cid}">删除</a>
<a href="${pageContext.request.contextpath }/clzUpload.jsp?cid=${b.cid}">上传图片</a>
<a href="${pageContext.request.contextpath }/clz/download?cid=${b.cid}">下载图片</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<!-- 这一行代码就相当于前面分页需求前端的几十行了 -->
<z:page pageBean="${pageBean }"></z:page>
</body>
</html>
运行前先设置一下 Tomcat
然后运行项目:
然后 我们测试一下增删改查:
查询:
接着我们新增一条数据:
现在多了一条数据了,接着我们修改一下:
14没有了,少了一条数据删除成功!二、文件上传
2.1 在springmv.xml中添加 多功能解析器 配置
(上面给的代码已经加了,这里博主只展示一下是哪部分的代码,下面配置代码都是一样的)
2.1.1 pom依赖
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
2.1.2 Springmvc.xml配置
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 必须和用户JSP 的pageEncoding属性一致,以便正确解析表单的内容 -->
<property name="defaultEncoding" value="UTF-8"></property>
<!-- 文件最大大小(字节) 1024*1024*50=50M-->
<property name="maxUploadSize" value="52428800"></property>
<!--resolveLazily属性启用是为了推迟文件解析,以便捕获文件大小异常-->
<property name="resolveLazily" value="true"/>
</bean>
2.2 前台的页面 添加 多功能表单设置 multipart/form-data
前台:
clzUpload.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="${pageContext.request.contextpath}/clz/upload" method="post" enctype="multipart/form-data">
<input type="text" value="${param.cid}" name="cid">
<input type="file" name="picFile">
<input type="submit">
</form>
</body>
</html>
在clzLIst界面加两个操作:
名词解释:
vo: view Object
Dto: 接收参数,参数不仅仅存在于实体类Model中
ClazzDto:
package com.ps.ssm.model.dto;
import com.ps.ssm.model.Clazz;
import org.springframework.web.multipart.multipartfile;
/**
* @author 彭于晏
* @site www.pengyuyan.com
* @company 玉渊工作室
* @create 2022-08-21 20:35
*/
public class ClazzDto extends Clazz {
// multipartfile的属性名一定要跟form 中的表单属性名一致
private multipartfile picFile;
public multipartfile getPicFile() {
return picFile;
}
public void setPicFile(multipartfile picFile) {
this.picFile = picFile;
}
}
2.3 后台要利用multipartfile类进行 文件接收
// 文件上传
@RequestMapping("/upload")
public String upload(ClazzDto clazzDto){
try {
// 前台上传文件
multipartfile picFile = clazzDto.getPicFile();
// 实际应该配置到resource.properties 中
String diskPath ="E:/temp/T280/";// 图片的存放地址
// http://localhost:8080/upload/mvc/suibian.png
String requestPath="/upload/mvc/";// 数据库保存的地址,也是访问地址
// 拿到上传文件的名字
String filename = picFile.getoriginalFilename();//suibian.png
FileUtils.copyInputStreamToFile(picFile.getInputStream(),new File(diskPath+filename));
// 将图片上传之后,并且将图片地址更行到数据库中
Clazz clazz =new Clazz();
clazz.setCid(clazzDto.getCid());
clazz.setPic(requestPath+filename);
this.clazzBiz.updateByPrimaryKeySelective(clazz);
}catch (Exception e){
e.printstacktrace();
}
return "redirect:/clz/list";
}
注:multipartfile的属性名一定要跟form 中的表单属性名一致
2.4 在IDEA中完成图片请求地址与硬盘中地址的映射关系
如果想要图片上传成功,我们就得完成在IDEA中完成图片请求地址与硬盘中地址的映射关系
那么我们就进行映射:
然后找到tomcat点图下右边那个加
然后选择你用映射的硬盘的地址:
点击选择图片
提交后:
出来了!三、文件下载
步骤:
一样在 ClazzController中加入下载的方法:
@RequestMapping("/download")
public ResponseEntity download(ClazzDto clazzDto){
try {
// 1.点击下载传递文件的ID,通过文件的ID查询出文件的路径
Clazz clazz = this.clazzBiz.selectByPrimaryKey(clazzDto.getCid());
String pic = clazz.getPic();// /upload/mvc/0314.png
//实际应该配置到resource.properties 中
String diskPath ="E:/temp/T280/";// 图片的存放地址
// http://localhost:8080/upload/mvc/suibian.png
String requestPath="/upload/mvc/";// 数据库保存的地址,也是访问地址
// 2.通过文件的请求地址,转换成文件存放的硬盘地址
String realPath=pic.replace(requestPath,diskPath);// E:/temp/T280/0314.png
String fileName= realPath.substring(realPath.lastIndexOf("/")+1);
// 3.将硬盘中的文件下载下来->固定代码
//下载关键代码
File file=new File(realPath);
HttpHeaders headers = new HttpHeaders();//http头信息
String downloadFileName = new String(fileName.getBytes("UTF-8"),"iso-8859-1");//设置编码
headers.setContentdispositionFormData("attachment", downloadFileName);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
//MediaType:互联网媒介类型 contentType:具体请求中的媒体类型信息
return new ResponseEntity<byte[]>(FileUtils.readFiletoByteArray(file),headers, HttpStatus.OK);
}catch (Exception e){
e.printstacktrace();
}
return null;
}
然后在clzList界面加入操作标签:
<a href="${pageContext.request.contextpath }/clzUpload.jsp?cid=${b.cid}">上传图片</a>
<a href="${pageContext.request.contextpath }/clz/download?cid=${b.cid}">下载图片</a>
最后看看效果吧!:
下载成功了!
今天的分享就到这里啦!如果喜欢博主的话可以点赞加收藏支持博主哦!
原文地址:https://www.jb51.cc/wenti/3287048.html
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