java实现mysql操作类分享 java连接mysql

这篇文章主要介绍了java实现的MysqL操作类示例，大家在连接数据的时候可以直接使用了

相关软件和驱动：

MysqL下载版本：4.1.11

http://dev.MysqL.com/downloads/MysqL/4.1.html

JDBC驱动下载版本：3.1.8

http://dev.MysqL.com/downloads/connector/j/3.1.html

复制代码代码如下:

代码Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->import java.sql.*;

public class MysqL {

public static String url = "jdbc:MysqL://localhost:3306/test";//characterEncoding=GBK

public static String username = "root";

public static String password = "root";

public static Connection con;

public static Statement stmt;

public static ResultSet rs;

public static void main(String[] args) throws sqlException {

connect();

operation();

stmt.close();

con.close();

}

public static void test() {

String sql_select = "select * from tablename where id=1";

String sql_insert = "insert into tablename (col1,col2..) values('1','2'...)";

String sql_update = "update tablename set colname='update' where id=1";

//insert(sql_insert);

//select(sql_select);

//update(sql_update);

}

public static void connect() {

// 定位驱动

try {

Class.forName("com.MysqL.jdbc.Driver");

System.out.println("加载驱动成功!");

} catch (ClassNotFoundException e) {

System.out.println("加载驱动失败!");

e.printstacktrace();

}

// 建立连接

try {

con = DriverManager.getConnection(url, username, password);

stmt = con.createStatement();

System.out.println("数据库连接成功!");

} catch(sqlException e) {

System.out.println("数据库连接失败!");

}

public static void select(String sql) {

try {

rs = stmt.executeQuery(sql);

ResultSetMetaData Meta_data = rs.getMetaData();//列名

for (int i_col = 1; i_col System.out.print(Meta_data.getColumnLabel(i_col) + " ");

}

System.out.println();

while (rs.next()) {

for (int i_col = 1; i_col System.out.print(rs.getString(i_col) + " ");

}

System.out.println();

}

rs.close();

}catch (Exception e) {

System.out.println("数据查询失败!");

}

public static void insert(String sql) {

try {

stmt.clearBatch();

stmt.addBatch(sql);

stmt.executeBatch();

System.out.println("数据插入成功!");

}catch (Exception e) {

System.out.println("数据插入失败!");

}

public static void update(String sql) {

try {

stmt.executeUpdate(sql);

System.out.println("数据更新成功!");

}catch (Exception e) {

System.out.println("数据更新失败!");

}

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