JDBC连接mysql
个人开发时主要还是使用mysql，所以就顺便把连接mysql的操作，记录下来，算备忘吧
其实主要有的操作包括
1、配置好环境，主要是安装mysql和下载连接需要的包（我用的是mysql-connector-java-5.1.3-rc-bin.jar）
2、注册驱动? Class.forName("com.jdbc.mysql.Driver");
3、创建连接? Connection con = DriverManager.getConnection("jdbc:mysql://127.0.0.1/test",user,password);
4、创建表达式 Statement stmt = con.createStatement();
5、执行sql语句并获得相应的结果集 ResultSet rs = stmt.executeQuery("select * from tables");
6、获取结果while(rs.next()){System.out.println(rs.getString(1));}
7、关闭连接rs.close();stmt.close();con.close();
代码如下：
package com;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;public class TestJDBC {public static void main(String[] args) {Connection con = null;Statement stmt = null;ResultSet rs = null;try {Class.forName("com.mysql.jdbc.Driver");con = DriverManager.getConnection("jdbc:mysql://127.0.0.1/train","xxx", "yyyy");stmt = con.createStatement();rs = stmt.executeQuery("select * from tbl_user");while (rs.next()) {String str = rs.getString(2);System.out.println(str);String uname = rs.getString("uname");System.out.println(uname);}} catch (SQLException e) {e.printStackTrace();} catch (ClassNotFoundException e) {e.printStackTrace();} finally {try {if (rs != null){rs.close();rs = null;}if (stmt != null){stmt.close();stmt = null;}if (con != null){con.close();stmt = null;}} catch (SQLException e2) {e2.printStackTrace();}}}}在jdbc中能够对事务进行处理：con.setAutoCommit(false);......con.commit();con.setAutoCommit(true);这样就实现了，对事务的操作。还有jdbc中批处理操作Statement stmt = con.createStatement();stmt.addBatch(sql语句);stmt.executeBatch();或者是PreparedStatement pstmt = con.preparedStatement("insert into table_a values(?,?)");pstmt.setInt(1,xxx);pstmt.setString(2,yyy);pstmt.addBatch();pstmt.excuteBatch();