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找不到 SpringBoot bCryptPasswordEncoder bean

分类：编程问答

如何解决找不到 SpringBoot bCryptPasswordEncoder bean

我正在尝试使用 bCrypt 设置带有登录系统的 SpringBoot 应用程序。以下是相关文件：

WebSecurityConfig.java

package api.config;

import components.UserService;
import lombok.AllArgsConstructor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

@Configuration
@AllArgsConstructor
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    private final UserService userService;

    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .authorizeRequests()
                .anyRequest().authenticated()
                .and().httpBasic();
    }
    
    @Override
    public void configure(WebSecurity web) {
        web.ignoring().antMatchers("/resources/**");
    }

    @Bean
    public DaoAuthenticationProvider authenticationProvider() {
        DaoAuthenticationProvider authenticationProvider = new DaoAuthenticationProvider();
        authenticationProvider.setUserDetailsService(userService);
        authenticationProvider.setPasswordEncoder(bCryptPasswordEncoder());
        return authenticationProvider;
    }

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userService).passwordEncoder(bCryptPasswordEncoder());
    }

    @Bean
    CorsConfigurationSource corsConfigurationSource() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**",new CorsConfiguration().applyPermitDefaultValues());
        return source;
    }
}

UserService.java

package components;

import entities.user.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;
import repositories.UserRepository;

import java.text.messageformat;
import java.util.Optional;

@Service
public class UserService implements UserDetailsService {
    private final UserRepository userRepository;
    private final BCryptPasswordEncoder bCryptPasswordEncoder;

    public UserService(UserRepository userRepository,BCryptPasswordEncoder bCryptPasswordEncoder) {
        this.userRepository = userRepository;
        this.bCryptPasswordEncoder = bCryptPasswordEncoder;
    }

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        Optional<User> optionalUser = userRepository.findByUsername(username);
        return optionalUser.orElseThrow(() -> new UsernameNotFoundException(messageformat.format("User with username {0} cannot be found.",username)));
    }

    public User register(User user) {
        String encryptedPassword = bCryptPasswordEncoder.encode(user.getpassword());
        user.setPassword(encryptedPassword);
        return userRepository.save(user);
    }

    public boolean passwordMatches(User user,String enteredPassword) {
        return bCryptPasswordEncoder.matches(enteredPassword,user.getpassword());
    }
}

UserRepository.java

package repositories;

import entities.user.User;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;

import java.util.Optional;

@Repository
public interface UserRepository extends CrudRepository<User,Integer> {
    Optional<User> findByUsername(String username);
}

我的pom.xml，如果有帮助的话：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://maven.apache.org/POM/4.0.0"
         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>backend</groupId>
    <artifactId>Backend</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>Backend</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>13</maven.compiler.source>
        <maven.compiler.target>13</maven.compiler.target>
        <start-class>api.Application</start-class>
        <log4jdbc.log4j2.version>1.16</log4jdbc.log4j2.version>
        <rest.assured.version>2.3.3</rest.assured.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.2</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
            <version>2.4.4</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>5.4.5</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>2.5.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>5.4.6</version>
        </dependency>

        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>javax.persistence-api</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>29.0-jre</version>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-text</artifactId>
            <version>1.9</version>
        </dependency>

        <dependency>
            <groupId>net.sf.jt400</groupId>
            <artifactId>jt400</artifactId>
            <version>10.6</version>
        </dependency>

        <dependency>
            <groupId>com.ibm.db2</groupId>
            <artifactId>jcc</artifactId>
            <version>11.5.5.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.11</version>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-math3</artifactId>
            <version>3.6</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <version>2.4.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>RELEASE</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>[3.2.2,)</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>5.6.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.12.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.12.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.12.1</version>
        </dependency>
        <dependency>
            <groupId>commons-cli</groupId>
            <artifactId>commons-cli</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>7.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish</groupId>
            <artifactId>javax.el</artifactId>
            <version>3.0.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.8</version>
                <executions>
                    <execution>
                        <id>analyze</id>
                        <goals>
                            <goal>analyze-only</goal>
                        </goals>
                        <configuration>
                            <failOnWarning>true</failOnWarning>
                            <outputXML>true</outputXML>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>3.0.0-M5</version>
            </plugin>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <version>0.8.6</version>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>api.Application</mainClass>
                    <layout>ZIP</layout>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
    <reporting>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-pmd-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <reportSets>
                    <reportSet>
                        <reports>
                            <!-- select non-aggregate reports -->
                            <report>report</report>
                        </reports>
                    </reportSet>
                </reportSets>
            </plugin>
        </plugins>
    </reporting>
</project>

我在尝试运行应用程序时收到以下错误：

***************************
APPLICATION Failed TO START
***************************

Description:

Parameter 1 of constructor in components.UserService required a bean of type 'org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder' that Could not be found.


Action:

Consider defining a bean of type 'org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder' in your configuration.

我查看了以下问题：

即使使用他们的代码，我似乎也无法让它工作；我究竟做错了什么？我想我可能遗漏了一些细节，但我找不到。

请注意，将 Autowired 注释添加到 bCryptPasswordEncoder 中的 UserService.java 字段无效。

解决方法

问题在于您的包结构。

@SpringBootApplication 应该在根和它下面的所有其他组件中。

例如：

com.example -> SpringBootApplicaiton
com.example.repository
com.example.api
com.example.components
,

问题在于我没有在问题中显示的内容，在我的主 @ComponentScan 类的 SpringBootApplication 注释中，我不知道我还需要在此处包含我的配置类 -我只是认为这仅适用于服务。

所以，我的正确注释是：

@ComponentScan({"com.example.services","com.example.config","com.example.api"})

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