原因:prepareStatement可以避免sql注入且更加高效
connection.setAutoCommit(false)
关闭自动提交的同时开启事务
package com.kuang.database; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.SQLException; public class TestTransaction { public static void main(String[] args) throws SQLException { Connection connection = null; PreparedStatement preparedStatement = null; try { connection = JdbcUtil.getConnection(); // 关闭自动提交,同时会开启事务 connection.setAutoCommit(false); String sql = "UPDATE users SET `NAME`='zhangsan' WHERE id =1"; preparedStatement = connection.prepareStatement(sql); int i = preparedStatement.executeUpdate(); if (i> 0) { System.out.println("update1 success"); } int j =1/0;// 测试失败情况 String sql1 = "UPDATE users SET `NAME`='kuangshen' WHERE id =2"; preparedStatement = connection.prepareStatement(sql1); i = preparedStatement.executeUpdate(); if (i> 0) { System.out.println("update2 success"); } connection.commit(); System.out.println("成功"); } catch (SQLException e) { e.printStackTrace(); } finally { preparedStatement.close(); connection.close(); } } }