jdbc connection database data rollback

import java.sql.*;
 
public class RollBack {
    
    
    /**
     * 数据库的属性信息
     */
    /**
     * 数据库主机 IP地址
     */
    static final String IP = "127.0.0.1";
    /**
     * 数据库端口号
     */
    static final String PORT = "1521";
    /**
     * 数据库名
     */
    static final String DB_NAME = "yztc";
    /**
     * 数据库 URL
     */
    static final String URL = "jdbc:oracle:thin:@" + IP + ":" + PORT + ":" + DB_NAME;
    /**
     * 数据库连接用户名
     */
    static final String USER = "scott";
    /**
     * 用户密码
     */
    static final String PSW = "tiger";
 
 
    public static void main(String[] args) {
    
    
        Connection conn = null;
        PreparedStatement ps1 = null;
        PreparedStatement ps2 = null;
        PreparedStatement ps3 = null;
 
        try {
    
    
            conn = DriverManager.getConnection(URL, USER, PSW);
            // 开启事务（手动提交事务）
            conn.setAutoCommit(false);
            // 插入语句
            String sql = "INSERT INTO person(name,psw,age,sex,description) VALUES(?,?,?,?,?)";
            ps1 = conn.prepareStatement(sql);
 
            ps1.setString(1, "李四");
            ps1.setString(2, "123");
            ps1.setInt(3, 18);
            ps1.setString(4, "男");
            ps1.setString(5, "个人说明");
 
            ps1.executeUpdate();
            // 设置回滚点
            Savepoint setSavepoint = conn.setSavepoint();
 
            // 更新数据
            String sql2 = "UPDATE person SET name=? WHERE personid=?";
            ps2 = conn.prepareStatement(sql2);
            ps2.setString(1, "张三");
            ps2.setInt(2, 70);
            ps2.executeUpdate();
 
            // 删除数据
            String sql3 = "DELETE FROM person WHERE personid=?";
            ps3 = conn.prepareStatement(sql3);
            ps3.setInt(1, 70);
            ps3.executeUpdate();
 
            // 回滚到设置回滚点的位置
            conn.rollback(setSavepoint);
            // 提交事务
            conn.commit();
            // 恢复最初的设置
            conn.setAutoCommit(true);
 
        } catch (SQLException e) {
    
    
            e.printStackTrace();
        } finally {
    
    
            if (ps1 != null) {
    
    
                try {
    
    
                    ps1.close();
                } catch (SQLException e) {
    
    
                    e.printStackTrace();
                }
            }
            if (ps2 != null) {
    
    
                try {
    
    
                    ps2.close();
                } catch (SQLException e) {
    
    
                    e.printStackTrace();
                }
            }
            if (ps3 != null) {
    
    
                try {
    
    
                    ps3.close();
                } catch (SQLException e) {
    
    
                    e.printStackTrace();
                }
            }
            if (conn != null) {
    
    
                try {
    
    
                    conn.close();
                } catch (SQLException e) {
    
    
                    e.printStackTrace();
                }
            }
        }
 
 
    }
}