怎么样使用PHP脚本和JAVA连接mysql数据库？

<?php
/*****************************
*数据库连接
*****************************/
$conn = @mysql_connect("localhost","root","123");
if (!$conn){
 die("连接数据库失败：" . mysql_error());
}
mysql_select_db("test", $conn);
//字符转换，读库
mysql_query("set character set utf8");
mysql_query("set names utf8");
?>

<?php 
 error_reporting(0);   //防止报错
 include('mysql.php');
 $result=mysql_query("select * from user"); //根据前面的计算出开始的记录和记录数
 // 循环取出记录
 $six;
 while($row=mysql_fetch_row($result))
 { 
 echo $row[0];
 echo $row[1];
 }
?>

package com.mysqltest;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
/*
 * **Mysql连接**
 * 
 * 参数：
 * conn 连接
 * url mysql数据库连接地址
 * user 数据库登陆账号
 * password 数据库登陆密码
 * 方法：
 * conn 获取连接
 */
public class MySQLConnection {
 public static Connection conn = null;
 public static String driver = "com.mysql.jdbc.Driver";
 public static String url = "jdbc:mysql://127.0.0.1:3306/post";
 public static String user = "root";
 public static String password = "123";
 /*
  * 创建Mysql数据连接 第一步：加载驱动 Class.forName（Driver） 第二步：创建连接
  * DriverManager.getConnection(url, user, password);
  */
 public Connection conn() {
  try {
   Class.forName(driver);
  } catch (ClassNotFoundException e) {
   System.out.println("驱动加载错误");
   e.printStackTrace();
  }
  try {
   conn = DriverManager.getConnection(url, user, password);
  } catch (SQLException e) {
   System.out.println("数据库链接错误");
   e.printStackTrace();
  }
  return conn;
 }
}

package com.mysqltest;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/*
 * mysql增删改查
 */
public class Work {
 /*
  * insert 增加
  */
 public static int insert() {
  MySQLConnection connection = new MySQLConnection();
  Connection conns; // 获取连接
  PreparedStatement pst; // 执行Sql语句
  int i = 0;
  String sql = "insert into user (username,password) values(?,?)";
  try {
   conns = connection.conn();
   pst = conns.prepareStatement(sql);
   pst.setString(1, "lizi");
   pst.setString(2, "123");
   i = pst.executeUpdate();
   pst.close();
   conns.close();
  } catch (SQLException e) {
   System.out.println("数据写入失败");
   e.printStackTrace();
  }
  return i;
 }
 /*
  * select 写入
  */
 public static void select() {
  MySQLConnection connection = new MySQLConnection();
  Connection conns; // 获取连接
  PreparedStatement pst; // 执行Sql语句(Statement)
  ResultSet rs; // 获取返回结果
  String sql = "select * from user";
  try {
   conns = connection.conn();
   pst = conns.prepareStatement(sql);
   rs = pst.executeQuery(sql);// 执行sql语句
   System.out.println("---------------------------------------");
   System.out.println("名字  |  密码");
   while (rs.next()) {
    System.out.println(rs.getString("username") + "  |  " + rs.getString("password"));
   }
   System.out.println("---------------------------------------");
   conns.close();
   pst.close();
   rs.close();
  } catch (SQLException e) {
   System.out.println("数据查询失败");
   e.printStackTrace();
  }
 }
 /*
  * update 修改
  */
 public static int update() {
  MySQLConnection connection = new MySQLConnection();
  Connection conns; // 获取连接
  PreparedStatement pst; // 执行Sql语句(Statement)
  int i = 0;
  String sql = "update user set password = ? where username = ?";
  try {
   conns = connection.conn();
   pst = conns.prepareStatement(sql);
   pst.setString(1, "123");
   pst.setString(2, "lizi");
   i = pst.executeUpdate();
   pst.close();
   conns.close();
  } catch (SQLException e) {
   System.out.println("数据修改失败");
   e.printStackTrace();
  }
  return i;
 }
 /*
  * delete 删除
  */
 public static int delete() {
  MySQLConnection connection = new MySQLConnection();
  Connection conns; // 获取连接
  PreparedStatement pst; // 执行Sql语句(Statement)
  int i = 0;
  String sql = "delete from user where username = ?";
  try {
   conns = connection.conn();
   pst = conns.prepareStatement(sql);
   pst.setString(1, "lizi");
   i = pst.executeUpdate();
   pst.close();
   conns.close();
  } catch (SQLException e) {
   System.out.println("数据删除失败");
   e.printStackTrace();
  }
  return i;
 }
 /*
  * test
  */
 public static void main(String[] args) {
  // System.out.println(insert());
   select();
  // System.out.println(update());
  // System.out.println(delete());
 }
}

<?php
 $conn=@mysql_connect("localhost","root","")or die("数据库连接错误");//链接数据库服务器
 mysql_select_db("messageboard",$conn);//选择数据库名为messageboard
 mysql_query("set names 'utf'");//使用utf编码，这里不能写成utf-否则将显示乱码，但UTF不区分大小写
 ?>

<>$sql=mysql_query("select * from tb_book");
$info=mysql_fetch_object($sql);
<>$sql=mysql_query("select * from tb_book where bookname like '%".trim($txt_book)."%'")；
$info=mysql_fetch_object($sql);

<>$sql=mysql_query("select * from tb_book");
$info=mysql_fetch_object($sql);
<>$sql=mysql_query("select * from tb_book where bookname like '%".trim($txt_book)."%'");
$info=mysql_fetch_object($sql);

<>$sql=mysql_query("select * from tb_book");
$row=mysql_fetch_row($sql);
<>$sql=mysql_query("select * from tb_book where bookname like '%".trim($txt_book)."%'");
$row=mysql_fetch_row($sql);

$sql=mysql_query("select * from tb_book");
......
<?php $nums=mysql_num_rows($sql);echo $nums;?>