JDBC事务的简单使用

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBC_transactions {
    public static void main(String[] args) {
        //使用try-with-resources的方法自动关闭连接
        //首先还是先初始化驱动
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }

        //连接数据库
        try (Connection connection = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/how2java?characterEncoding=UTF-8", "root", "admin");
             Statement statement = connection.createStatement();) {
            //执行一个事务
            //首先关闭自动提交
            connection.setAutoCommit(false);
            //执行两个更新语句，一个增加某个字段，一个减少某个字段
            String sql1="update hero set hp=hp-10 where id=1";
            String sql2="update hero set hp=hp+10 where id=1";
            statement.execute(sql1);
            statement.execute(sql2);
            //手动提交
            connection.commit();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

connection.setAutoCommit(false);

connection.commit();