JavaWeb_(Hibernate框架)Hibernate论坛项目中多对多案例

　　基于SSH论坛小型项目　　传送门

　　用户和发帖进行举例

　　多对多关系：多个用户可以回复多个帖子

　　因此引入了一张回复表，用来保存用户id和帖子id

CREATE TABLE `hforum`.`answer` (
  `id` VARCHAR(50) NOT NULL,
  `userid` VARCHAR(50) NULL DEFAULT NULL,
  `pasteid` VARCHAR(50) NULL DEFAULT NULL,
  `content` VARCHAR(255) NULL,
  PRIMARY KEY (`id`));

Gary.sql

　　数据库中帖子数据(测试时候是没有的~)

　　用户在login.jsp中进行登陆，登陆成功后跳转index.jsp，访问add.jsp后，用户可以发起新帖，用户发帖后，再访问detail.jsp，可以对发布的帖子进行回复。(注意：发布帖子时有一个pasteid，要保证回复帖子时回复该pasteid)

　　用户回帖后，数据库中answer表存放的数据

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                            500
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                        <div class="qContent">以前都是OWC控件在程序中做Excel做操作，以前都是OWC控件在程序中做Excel做操作主要包裹以前裹做Excel做操作，主要包裹以前都是OWC控件在程序中做Excel做操作，主要包裹主要包裹以前都是主要包中做Excel做操作，主要包裹，主要包裹...</div>
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                            500
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                        <div class="qContent">以前都是OWC控件在程序中做Excel做操作，以前都是OWC控件在程序中做Excel做操作主要包裹以前裹做Excel做操作，主要包裹以前都是OWC控件在程序中做Excel做操作，主要包裹主要包裹以前都是主要包中做Excel做操作，主要包裹，主要包裹...</div>
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                            500
                            <image src="images/bean.jpg" class="bean"> <span
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                        <div class="qContent">以前都是OWC控件在程序中做Excel做操作，以前都是OWC控件在程序中做Excel做操作主要包裹以前裹做Excel做操作，主要包裹以前都是OWC控件在程序中做Excel做操作，主要包裹主要包裹以前都是主要包中做Excel做操作，主要包裹，主要包裹...</div>
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                            500
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                        <div class="qContent">以前都是OWC控件在程序中做Excel做操作，主要包裹以前裹做Excel做操作，主要包裹以前都是OWC控件在程序中做Excel做操作，主要包裹主要包裹以前都是主要包中做Excel做操作，主要包裹，主要包裹...</div>
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index.jsp

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                            <i class="iconfont" title="回答">&#xe60c;</i> 2
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                        <a class="jie-user" href=""> <img src="res/images/uer.jpg"
                            alt="头像"> <cite> 压缩 <em>2017-05-01发布</em>
                        </cite>
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                                <a class="jie-user" href=""> <img src="res/images/uer.jpg"
                                    alt=""> <cite> <i>纸飞机</i> <!-- <em>(楼主)</em>
                  <em style="color:#5FB878">(管理员)</em> -->
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                                </a>
                                <div class="detail-hits">
                                    <span>3分钟前</span>
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                                <i class="iconfont icon-caina" title="最佳答案"></i>
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                            <div class="detail-body jieda-body">
                                <p>么么哒</p>
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                                <span class="jieda-zan zanok" type="zan"><i
                                    class="iconfont icon-zan"></i><em>12</em> </span>
                                <!-- <div class="jieda-admin">
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              </div> -->
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                        <li data-id="13"><a name="item-121212121212"></a>
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                                <a class="jie-user" href=""> <img src="res/images/uer.jpg"
                                    alt=""> <cite> <i>香菇</i> <em
                                        style="color: #FF9E3F">活雷锋</em>
                                </cite>
                                </a>
                                <div class="detail-hits">
                                    <span>刚刚</span>
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                            <div class="detail-body jieda-body">
                                <p>蓝瘦</p>
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                            <div class="jieda-reply">
                                <span class="jieda-zan" type="zan"><i
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                        <!-- <li class="fly-none">没有任何回答</li> -->
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                    <span id="toName">@ 压缩(楼主)</span>
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detail.jsp

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<html>
<head>
<meta charset="utf-8">
<title>发表问题</title>
<meta name="viewport"
    content="width=device-width, initial-scale=1, maximum-scale=1">
<link rel="stylesheet" href="css/head.css" />
<link rel="stylesheet" href="layui/css/layui.css">

<link rel="stylesheet" href="css/global.css">

<script src="layui/layui.js"></script>
</head>
<body>

    <div class="dvhead">
        <div class="dvlogo">
            <a href="index.html">你问我答</a>
        </div>
        <div class="dvsearch">10秒钟注册账号，找到你的同学</div>
        <div class="dvreg">
            已有账号，立即&nbsp;<a href="login.html">登录</a>
        </div>
    </div>

    <div class="main layui-clear">
        <div class="fly-panel" pad20>
            <h2 class="page-title">发表问题</h2>

            <!-- <div class="fly-none">并无权限</div> -->

            <div class="layui-form layui-form-pane">
                <form action="${pageContext.request.contextPath }/PasteAction_addPaste ">
                    <div class="layui-form-item">
                        <label for="L_title" class="layui-form-label">标题</label>
                        <div class="layui-input-block">
                            <input type="text" id="L_title" name="title" required
                                lay-verify="required" autocomplete="off" class="layui-input">
                        </div>
                    </div>
                    
                    <div class="layui-form-item layui-form-text">
                        <div class="layui-input-block">
                            <div class="editor">
                                <textarea id="content" name="content"
                                    style="width: 1040px; height: 450px; visibility: hidden;"></textarea>
                            </div>
                        </div>
                        <label for="L_content" class="layui-form-label" style="top: -2px;">描述</label>
                    </div>
                    
                    <div class="layui-form-item">
                        <label for="L_title" class="layui-form-label">悬赏</label>
                        <div class="layui-input-block">
                            <input type="number" name="offer" required lay-verify="required"
                                autocomplete="off" class="layui-input">
                        </div>
                    </div>
                    <div class="layui-form-item">
                        <button class="layui-btn" lay-filter="*" lay-submit>立即发布</button>
                    </div>
                </form>
            </div>
        </div>
    </div>

    <script type="text/javascript" charset="utf-8" src="js/kindeditor.js"></script>
    <script type="text/javascript">
        KE.show({
            id : 'content',
            resizeMode : 1,
            cssPath : './index.css',
            items : [ 'fontname', 'fontsize', 'textcolor', 'bgcolor', 'bold',
                    'italic', 'underline', 'removeformat', 'justifyleft',
                    'justifycenter', 'justifyright', 'insertorderedlist',
                    'insertunorderedlist', 'emoticons', 'image', 'link' ]
        });
    </script>
    <script>
        layui.cache.page = '';
        layui.cache.user = {
            username : '游客',
            uid : -1,
            avatar : '../res/images/avatar/00.jpg',
            experience : 83,
            sex : '男'
        };
        layui.config({
            version : "2.0.0",
            base : '../res/mods/'
        }).extend({
            fly : 'index'
        }).use('fly');
    </script>
</body>
</html>

add.jsp

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">
    
<struts>

    <constant name="struts.devMode" value="true"></constant>
    <constant name="struts.enable.DynamicMethodInvocation" value="true"></constant>
    
    <package name="hibernateTest" namespace="/" extends="struts-default">
        <global-allowed-methods>regex:.*</global-allowed-methods>
        <action name="UserAction_*" class="com.Gary.web.UserAction" method="{1}">
            
            <result name="toIndex" type="redirect">/index.jsp</result>
            <result name = "login">/login.jsp</result>
        </action>
    
        <action name="PasteAction_*" class="com.Gary.web.PasteAction" method="{1}">
            <result name="toIndex" type="redirect">/index.jsp</result>
        </action>
    
        <action name="AnswerAction_*" class="com.Gary.web.AnswerAction" method="{1}">
            <result name="success">/index.jsp</result>
        </action>
    
    </package>
    

</struts>

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!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>
    
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        
        <property name="hibernate.connection.url">jdbc:mysql:///hforum</property>
        
        <property name="hibernate.connection.username">root</property>
        
        <property name="hibernate.connection.password">123456</property>
        
        <!-- 将hibernate生成的sql语句打印到控制台 -->
        <property name="hibernate.show_sql"></property>
        
        <!-- 格式化hibernate生成的sql语句 -->
        <property name="hibernate.format_sql"></property>
        
        <!-- 配置hibernate自动创建表-->
        <property name="hibernate.hbm2ddl.auto">update</property>
        
        <!-- 配置数据库的隔离级别-->
        <property name="hibernate.connection.isolation">4</property>
        
        <!-- 配置事务 (session与当前线程绑定)  -->
        <property name="hibernate.current_session_context_class">thread</property>
    
        <mapping resource="com/Gary/domain/User.hbm.xml"/>
        <mapping resource="com/Gary/domain/Paste.hbm.xml"/>
        <mapping resource="com/Gary/domain/Answer.hbm.xml"/>
    
    </session-factory>

</hibernate-configuration>

hibernate.xml

　　com.Gary.dao

package com.Gary.dao;

import org.hibernate.Session;

import com.Gary.domain.Answer;
import com.Gary.utils.HibernateUtils;

public class AnswerDao {

    public void addAnswer(Answer answer) {
        
        Session session = HibernateUtils.getCurrentSession();
        session.save(answer);
        
        
    }

}

AnswerDao.java

package com.Gary.dao;

import org.hibernate.Session;

import com.Gary.domain.Paste;
import com.Gary.utils.HibernateUtils;

public class PasteDao {

    public void addPaste(Paste paste) {
        
        Session session = HibernateUtils.getCurrentSession();
        session.save(paste);
        
    }

    public Paste findPasteById(String pasteid) {
    
        Session session = HibernateUtils.getCurrentSession();
        return session.get(Paste.class, pasteid);
        
    }

}

PasteDao.java

package com.Gary.dao;

import org.hibernate.Session;
import org.hibernate.query.NativeQuery;

import com.Gary.domain.User;
import com.Gary.utils.HibernateUtils;

public class UserDao {

    //原生SQL查询
    public User findUesr(User user) {

        Session session = HibernateUtils.getCurrentSession();
        String sql = "select * from user where username = ? and password = ?";
        NativeQuery query = session.createSQLQuery(sql);
        query.setParameter(1, user.getUsername());
        query.setParameter(2, user.getPassword());
        query.addEntity(User.class);
        
        User temp = (User) query.uniqueResult();
        
        
        
        return temp;

    }

}

UserDao.java

　　com.Gary.domain

package com.Gary.domain;

public class Answer {

    private String id;
    private String content;
    
    private User user;
    private Paste paste;
    
    
    
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
    public User getUser() {
        return user;
    }
    public void setUser(User user) {
        this.user = user;
    }
    public Paste getPaste() {
        return paste;
    }
    public void setPaste(Paste paste) {
        this.paste = paste;
    }
    
    
}

Answer.java

package com.Gary.domain;

import java.util.HashSet;
import java.util.Set;

public class Paste {

    private String id;
    
    private String title;
    private String content;
    private Integer offer;
    private Integer ansnum;
    private Integer glanceover;
    private String createtime;
    
    
    //一个帖子属于一个用户
    private User user;
    
    private Set<User> userAnswerSet = new HashSet<User>();
    
    
    
    public Set<User> getUserAnswerSet() {
        return userAnswerSet;
    }
    public void setUserAnswerSet(Set<User> userAnswerSet) {
        this.userAnswerSet = userAnswerSet;
    }
    public User getUser() {
        return user;
    }
    public void setUser(User user) {
        this.user = user;
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
    public Integer getOffer() {
        return offer;
    }
    public void setOffer(Integer offer) {
        this.offer = offer;
    }
    public Integer getAnsnum() {
        return ansnum;
    }
    public void setAnsnum(Integer ansnum) {
        this.ansnum = ansnum;
    }
    public Integer getGlanceover() {
        return glanceover;
    }
    public void setGlanceover(Integer glanceover) {
        this.glanceover = glanceover;
    }
    public String getCreatetime() {
        return createtime;
    }
    public void setCreatetime(String createtime) {
        this.createtime = createtime;
    }
    
    
    
    
}

Paste.java

package com.Gary.domain;

import java.util.HashSet;
import java.util.Set;

public class User {

    private String id;;
    private String username;
    private String password;
    
    private String name;
    private String email;
    private String telephone;
    
    //一对多
    private Set<Paste> pasteSet = new HashSet<Paste>();
    
    private Set<Paste> answerPasteSet = new HashSet<Paste>();
    
    
    
    public Set<Paste> getAnswerPasteSet() {
        return answerPasteSet;
    }
    public void setAnswerPasteSet(Set<Paste> answerPasteSet) {
        this.answerPasteSet = answerPasteSet;
    }
    public Set<Paste> getPasteSet() {
        return pasteSet;
    }
    public void setPasteSet(Set<Paste> pasteSet) {
        this.pasteSet = pasteSet;
    }
    public String getId() {
        return id;
    }
    public void setId(String 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;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getTelephone() {
        return telephone;
    }
    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }
    
    
    
}

User.java

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.Gary.domain">

        <class name ="Answer" table="answer">
        <id name="id">
            <generator class="uuid"></generator>
        </id>
        
        <property name="content" column="content"></property>
        
        <many-to-one name="user" column="userid" class="User"></many-to-one>
        <many-to-one name="paste" column="pasteid" class="Paste"></many-to-one>
        
        
    </class>

</hibernate-mapping>

Answer.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.Gary.domain">
    <class name = "Paste" table="paste">
        <id name="id">
            <generator class="uuid"></generator>
        </id>
        
        <property name="title" column="title"></property>
        <property name="content" column="content"></property>
        <property name="offer" column="offer"></property>
        <property name="ansnum" column="ansnum"></property>
        <property name="glanceover" column="glanceover"></property>
        <property name="createtime" column="createtime"></property>
    
        <!-- name:引用属性名
                class:与他关系的对象的完整类名
                column:外键列名
         -->
         <!-- inverse:配置关系是否不维护
                         true:    不维护
                         false:    维护关系
                insert属性:
                性能优化:
                无论怎么放弃维护,总有一方需要维护(按照默认值来就行)
                一般的开发中,一的一方放弃维护,多的一方不放弃维护
        -->
        <many-to-one name="user" class="User" column="userid" insert="true"></many-to-one>
    
    <!-- 多对多关系 转换为两个一对多 -->
        <set name="userAnswerSet">
            <!-- 指定关联的外键的列名 -->
            <key column="userid"></key>
            <!-- 指定关联的外键的实体类名 -->
            <one-to-many class="Answer"/>
        </set>
    
    
    </class>

</hibernate-mapping>

Paste.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
    
    
<hibernate-mapping package="com.Gary.domain">
    <class name="User" table="user">
        <id name = "id">
            <generator class="uuid"></generator>
        </id>
        
        
        <property name="username" column="username"></property>
        <property name="password" column="password"></property>
        <property name="name" column="name"></property>
        <property name="email" column="email"></property>
        <property name="telephone" column="telephone"></property>
        
        
        <!-- name:集合属性名字
                column:外键列名
                class:与他相关的对象的完整类名 -->
                <!-- 
                    cascade:级联操作
                        save-update:级联保存,级联更新
                        delete:级联删除
                        all
                 -->
                 <!-- inverse:配置关系是否不维护
                         true:    不维护
                         false:    维护关系
                  -->
        <set name="pasteSet">
            <key column="userid"></key>
            <one-to-many class="Paste"/>
        </set>
        
        <set name="answerPasteSet">
            <key column="pasteid"></key>
            <one-to-many class="Answer"/>
        </set>
        
        
    </class>
</hibernate-mapping>

User.hbm.xml

　　com.Gary.service

package com.Gary.service;

import org.hibernate.Transaction;

import com.Gary.dao.AnswerDao;
import com.Gary.domain.Answer;
import com.Gary.utils.HibernateUtils;

public class AnswerService {

    public void addAnswer(Answer answer) {
        
        AnswerDao answerDao= new AnswerDao();
        Transaction beginTransaction = HibernateUtils.getCurrentSession().beginTransaction();
    
        try {
            answerDao.addAnswer(answer);    
        }catch(Exception e)
        {
            beginTransaction.rollback();
        }
        
        
        beginTransaction.commit();
        
    }

}

AnswerService.java

package com.Gary.service;

import org.hibernate.Transaction;

import com.Gary.dao.PasteDao;
import com.Gary.domain.Paste;
import com.Gary.utils.HibernateUtils;

public class PasteService {

    public void addPaste(Paste paste) {
        
        PasteDao pasteDao = new PasteDao();
        
        Transaction beginTransaction = HibernateUtils.getCurrentSession().beginTransaction();
        
        try
        {
            pasteDao.addPaste(paste);
        }
        catch(Exception e)
        {
            beginTransaction.rollback();
        }
        
        beginTransaction.commit();
    }

    //查找  不用进行事务保护
    public Paste findPasteById(String pasteid) {
        
        PasteDao pasteDao = new PasteDao();
    
        Paste paste = null;
        Transaction beginTransaction = HibernateUtils.getCurrentSession().beginTransaction();    
        try
        {
            paste = pasteDao.findPasteById(pasteid);
        }
        catch(Exception e)
        {
            beginTransaction.rollback();
        }
        
        beginTransaction.commit();
        return paste;
        
    }

}

PasteService.java

package com.Gary.service;

import org.hibernate.Transaction;

import com.Gary.dao.UserDao;
import com.Gary.domain.User;
import com.Gary.utils.HibernateUtils;

public class UserService {

    public User findUesr(User user) {
        
        UserDao userDao = new UserDao();
        //开启事务(查询不需要数据库保护)
        Transaction transaction = HibernateUtils.getCurrentSession().beginTransaction();
        
        User temp = null;
        
        try
        {
            temp = userDao.findUesr(user);
        }
        catch(Exception e)
        {
            transaction.rollback();
        }
        
        //提交事务
        transaction.commit();
        
        
        return temp;
    }

}

UserService.java

　　com.Gary.utils

package com.Gary.utils;

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

public class HibernateUtils {

    private static SessionFactory sessionFactory = null;
    
    static {
        Configuration config = new Configuration().configure();
        sessionFactory = config.buildSessionFactory();
    }
    
    public static Session getSession()
    {
        return sessionFactory.openSession();
    }
    
    public static Session getCurrentSession()
    {
        return sessionFactory.getCurrentSession();
    }
    
}

HibernateUtils.java

　　com.Gary.web

package com.Gary.web;

import com.Gary.domain.Answer;
import com.Gary.domain.Paste;
import com.Gary.domain.User;
import com.Gary.service.AnswerService;
import com.Gary.service.PasteService;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class AnswerAction extends ActionSupport implements ModelDriven<Answer>{

    public Answer answer = new Answer();
    public String pasteid;

    public String addAnswer() throws Exception {

        AnswerService answerService = new AnswerService();
        PasteService pasteService = new PasteService();
        
        Paste paste = pasteService.findPasteById(pasteid);
        answer.setPaste(paste);
        User user = (User) ActionContext.getContext().getSession().get("user");
        answer.setUser(user);

        System.out.println(pasteid + " --- "+answer.getContent());
        answerService.addAnswer(answer);

        return "success";
    }

    public String getPasteid() {
        return pasteid;
    }

    public void setPasteid(String pasteid) {
        this.pasteid = pasteid;
    }

    @Override
    public Answer getModel() {
    
        return answer;
    }

}

AnswerAction.java

package com.Gary.web;

import java.text.SimpleDateFormat;
import java.util.Date;

import com.Gary.domain.Paste;
import com.Gary.domain.User;
import com.Gary.service.PasteService;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class PasteAction extends ActionSupport implements ModelDriven<Paste>{

    public Paste paste = new Paste();
    
    //addPaste
    public String addPaste() throws Exception {
        
        //没有的数据手动封装
        //title  content  offer
        paste.setAnsnum(0);
        paste.setGlanceover(0);
        Date date = new Date(System.currentTimeMillis());
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        String createtime = format.format(date);
        paste.setCreatetime(createtime);
        User user = (User) ActionContext.getContext().getSession().get("user");
        paste.setUser(user);

        PasteService pasteService = new PasteService();
        pasteService.addPaste(paste);
        
        System.out.println("PasteAction"+paste);
        
        return "toIndex";
    }

    @Override
    public Paste getModel() {
        
        return paste;
    }

    
    
}

PasteAction.java

package com.Gary.web;

import com.Gary.domain.User;
import com.Gary.service.UserService;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport implements ModelDriven<User>{

    public User user = new User();
    
    public String login() throws Exception {
        
        UserService userService = new UserService();
        
        User temp = userService.findUesr(user);
        
        System.out.println("UserAction"+temp);
        
        if(temp!=null)
        {
            ActionContext.getContext().getSession().put("user", temp);
            return "toIndex";
        }
        else
        {
            ActionContext.getContext().put("error", "用户名或密码错误！！");
            return "login";
        }
        
        
        
    }

    @Override
    public User getModel() {
    
        return user;
    }

    
    
}

UserAction.java

posted @ 2019-11-28 14:43 Cynical丶Gary 阅读(187) 评论(0) 编辑收藏举报

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Cynical丶Gary

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