Spring_SSH整合之_架构的历史(四层架构整合JSP+MySQL+JavaBean+Hibernate+Dao+Impl)_4

原创

wx62dfdc6aea345 2022-07-27 10:14:21 博主文章分类：Java ©著作权

文章标签 hibernate java html 文章分类 Java 后端开发

©著作权归作者所有：来自51CTO博客作者wx62dfdc6aea345的原创作品，请联系作者获取转载授权，否则将追究法律责任

User.java-->User.hbm.xml-->Hibernate.cfg.xml-->HibernateUtil.java
-->UserDao.java-->UserDaoImpl.java-->UserManager.java-->UserManagerImpl.java
   |-->UserManagerTest.java                                    
-->|                                  |-->registFail.jsp
   |-->regist.jsp-->registDeal.jsp-->|
                             |-->registSuccess.jsp

User.java

package com.bjsxt.registration.model;

//贫血模型 充血模型
public class User {
  private Integer id;
  private String username;
  private String password;

  public Integer getId() {
    return id;
  }

  public void setId(Integer id) {
    this.id = id;
  }

  public String getUsername() {
    return username;
  }

  public void setUsername(String username) {
    this.username = username;
  }

  public String getpassword() {
    return password;
  }

  public void setpassword(String password) {
    this.password = password;
  }

}

User.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
  "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
  "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<!-- This mapping demonstrates how to use an "inverse" join to map an association 
  table as an association with one-to-many multiplicity at the level of the 
  object model. -->

<hibernate-mapping package="com.bjsxt.registration.model">
  <class name="User" table="user">
    <id name="id" type="integer" column="id">
      <generator class="native" />
    </id>
    <property name="username" type="string" column="username"/>
    <property name="password" type="string" column="password"/>
  </class>

</hibernate-mapping>

Hibernate.cfg.xml

<!DOCTYPE hibernate-configuration PUBLIC
  "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
  "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
  <session-factory name="foo">
    <!-- 数据库连接：方言、驱动、连接、用户名、密码 -->
    <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="connection.url">jdbc:mysql://localhost:3306/spring</property>
    <property name="connection.username">root</property>
    <property name="connection.password">root</property>

    <!-- 显示SQL语句 -->
    <property name="show_sql">true</property>
    <!-- 自动构建表结构 -->
    <property name="hbm2ddl.auto">update</property>

    <!-- 映射配置 -->
    <mapping resource="com/bjsxt/registration/model/User.hbm.xml" />
  </session-factory>
</hibernate-configuration>

HibernateUtil.java

package com.bjsxt.registration.util;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
  private static SessionFactory sessionFactory;
  static {
    sessionFactory = new Configuration().configure().buildSessionFactory();
  }

  public static SessionFactory getSessionFactory() {
    return sessionFactory;
  }
}

UserDao.java

package com.bjsxt.registration.dao;

import com.bjsxt.registration.model.User;

public interface UserDao {
  /** 保存数据 */
  public void save(User user);

  /** 查询某个数据是多少条 */
  public Long getCount(User user);
}

UserDaoImpl.java

package com.bjsxt.registration.dao.impl;

import org.hibernate.Session;
import org.hibernate.Transaction;

import com.bjsxt.registration.dao.UserDao;
import com.bjsxt.registration.model.User;
import com.bjsxt.registration.util.HibernateUtil;

public class UserDaoImpl implements UserDao {

  public void save(User user) {
    Session session = HibernateUtil.getSessionFactory().openSession();
    Transaction tx = session.beginTransaction();

    session.save(user);

    tx.commit();
    session.close();
  }

  public Long getCount(User user) {
    Session session = HibernateUtil.getSessionFactory().openSession();
    Transaction tx = session.beginTransaction();

    Long count = (Long) session.createQuery(//
        "select count(u) from User u where username=:name")//
        .setParameter("name", user.getUsername())//
        .uniqueResult();
    tx.commit();
    session.close();
    return count;
  }

}

UserManager.java

package com.bjsxt.registration.service;

import com.bjsxt.registration.model.User;

public interface UserManager {
  /** 判断是否存在 */
  public boolean exists(User user);

  /** 增加数据 */
  public void add(User user);
}

UserManagerImpl.java

package com.bjsxt.registration.service.impl;

import com.bjsxt.registration.dao.UserDao;
import com.bjsxt.registration.dao.impl.UserDaoImpl;
import com.bjsxt.registration.model.User;
import com.bjsxt.registration.service.UserManager;

public class UserManagerImpl implements UserManager {
  private UserDao userDao = new UserDaoImpl();

  public boolean exists(User user) {
    Long count = userDao.getCount(user);
    if (count > 0) {
      return true;
    }
    return false;
  }

  public void add(User user) {
    userDao.save(user);
  }
}

UserManagerTest.java

package com.bjsxt.registration.service;

import org.junit.Assert;
import org.junit.Test;

import com.bjsxt.registration.model.User;
import com.bjsxt.registration.service.impl.UserManagerImpl;

public class UserManagerTest {
  private UserManager um = new UserManagerImpl();

  @Test
  public void testExists() {
    User u = new User();
    u.setUsername("a");
    boolean exists = um.exists(u);
    Assert.assertEquals(true, exists);
  }

  @Test
  public void testAdd() {
    User u = new User();
    u.setUsername("123");
    u.setpassword("a");
    boolean exists = um.exists(u);
    if (!exists) {
      um.add(u);
      u.setUsername(u.getUsername());
      Assert.assertEquals(true, um.exists(u));
    } else {
      Assert.fail("not added");
    }
  }

}

regist.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<title>用户注册</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">

</head>

<body>
  <h1>用户注册</h1><br/>
  <form action="registDeal.jsp" method="post">
    用户名：<input type="text" name="username"/><br/>
    密码：<input type="password" name="password"/><br/>
    确认密码：<input type="password" name="password2"/><br/>
    <input type="submit" value=" 提 交 "/>
  </form>
</body>
</html>

registDeal.jsp

<%@ page language="java" import="java.util.*, java.sql.*"
  pageEncoding="GB18030"%>
<%@ page import="com.bjsxt.registration.model.User"%>
<%@ page import="com.bjsxt.registration.service.UserManager"%>
<%@ page import="com.bjsxt.registration.service.impl.UserManagerImpl"%>
<%
  String path = request.getContextPath();
  String basePath = request.getScheme() + "://"
      + request.getServerName() + ":" + request.getServerPort()
      + path + "/";
  String username = request.getParameter("username");
  String password = request.getParameter("password");
  String password2 = request.getParameter("password2");

  User u = new User();
  u.setUsername(username);
  u.setpassword(password);

  UserManager um = new UserManagerImpl();
  boolean exits = um.exists(u);
  if (exits) {
    response.sendRedirect("registFail.jsp");
    return;
  }

  um.add(u);
  response.sendRedirect("registSuccess.jsp");
%>

registFail.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<title>失败</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">

</head>

<body>
  <h1>Fail!</h1>
</body>
</html>

registSuccess.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<title>成功</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">

</head>

<body>
  <h1>Success!</h1>
</body>
</html>