07JDBC事务管理

package cn.itcast.jdbc;

import cn.itcast.util.JDBCUtils;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

/**

• 事务操作

*/
public class JDBCDemo10 {

public static void main(String[] args) {
    Connection conn = null;
    PreparedStatement pstmt1 = null;
    PreparedStatement pstmt2 = null;

    try {
        //1. 获取连接
        conn = JDBCUtils.getConnection();
        // 开启事务
        conn.setAutoCommit(false);

        //2. 定义 sql
        //2.1 张三 - 500
        String sql1 = "update account set balance = balance - ? where id = ?";
        //2.2 李四 + 500
        String sql2 = "update account set balance = balance + ? where id = ?";
        //3. 获取执行 sql 对象
        pstmt1 = conn.prepareStatement(sql1);
        pstmt2 = conn.prepareStatement(sql2);
        //4. 设置参数
        pstmt1.setDouble(1,500);
        pstmt1.setInt(2,1);

        pstmt2.setDouble(1,500);
        pstmt2.setInt(2,2);
        //5. 执行 sql
        pstmt1.executeUpdate();
        // 手动制造异常
        int i = 3/0;

        pstmt2.executeUpdate();
        // 提交事务
        conn.commit();} catch (Exception e) {
        // 事务回滚
        try {if(conn != null) {conn.rollback();
            }
        } catch (SQLException e1) {e1.printStackTrace();
        }
        e.printStackTrace();}finally {JDBCUtils.close(pstmt1,conn);
        JDBCUtils.close(pstmt2,null);
    }


}

}