首页 > 代码库 > SSH整合(struts2.3.24+hibernate3.6.10+spring4.3.2+mysql5.5+myeclipse8.5+tomcat6+jdk1.6)

SSH整合(struts2.3.24+hibernate3.6.10+spring4.3.2+mysql5.5+myeclipse8.5+tomcat6+jdk1.6)

终于开始了ssh的整合,虽然现在比较推崇的是,ssm(springmvc+spring+mybatis)这种框架搭配确实比ssh有吸引力,因为一方面springmvc本身就是遵循spring标准,所以不用像struts那样添加jar包去管理,其次是mybatis不能算一个完全的orm框架(因为mybatis依旧写的是面向关系的sql)但是相比ssh更加灵活和优化更加容易。

貌似偏题了,重新说回ssh整合。

首先引入jar包:(这里需要新建一个web项目,如果你不知道怎么在myeclipse怎么新建一个web项目,那么你需要做的不是整合ssh,而是回去重新翻一遍java的IDE使用手册)

struts2(常规jar包):

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 hibernate常规jar包:

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spring jar包(包括core,aop,jdbc,tx,orm,spring-struts)ps:下图里面tx类的jar包被分在了aop中,因为aop中要用到事务,所以就不单独建一个user library

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mysql的jdbc的jar包:

 mysql-connector-java-5.0.8-bin.jar

 接着来看项目结构:

很简答的三层:dao,service,action,javabean放在entity包下面,所有的都写在配置文件里(spring管理的bean,hibernate的属性,struts2action的配置)

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 mysql的mybatis数据库中有两张表:

t_user

_dept

有人说干嘛起这样的名字,我只能说,我愿意你咬我啊(当然,这里肯定不是,一方面是避免和数据库中关键字重名,一方面是也可以表明这是数据库的表,免得和别的数据库中搞混)

user表里有四个字段,一个id,一个username,一个password,一个关联部门表的外键

dept中有两个字段,一个部门编号(deptNo),一个部门名称(deptName)

好了,准备条件都写好了,现在可以开始写

UserDao中三个方法,直接贴代码:

package com.mz.dao;import java.io.Serializable;import java.util.List;import org.hibernate.Query;import org.hibernate.SessionFactory;import org.hibernate.classic.Session;import com.mz.entity.User;public class UserDao {    private SessionFactory sessionFactory;    //保存一个user对象到数据库    public boolean save(User user) {        Serializable serializable = sessionFactory.getCurrentSession().save(user);        System.out.println("serializable:" + serializable);        return true;    }    //通过id寻找到user    public User getUserById(int id) {        User user = (User) sessionFactory.getCurrentSession().get(User.class, id);        return user;    }    //通过部门编号寻找到一个list的user    public List<User> getUserByDept(int deptNo) {        String hql = "from User user where user.dept.deptNo = ?";        Session session = this.sessionFactory.getCurrentSession();        //Criteria criteria = session.createCriteria(hql);        Query query = session.createQuery(hql);        query.setInteger(0, deptNo);        List<User> users = query.list();        return users;    }    public SessionFactory getSessionFactory() {        return sessionFactory;    }    public void setSessionFactory(SessionFactory sessionFactory) {        this.sessionFactory = sessionFactory;    }        }

 

通过hibernate中的SessionFactory建立数据持久层。有人说为什么本来该有事务的地方现在却没有了,我只能说,你还没看完,这部份已经被spring声明式事务管理了好吧。

其次是UserService,简化之后只有一个方法:

package com.mz.service;import com.mz.dao.UserDao;import com.mz.entity.User;public class UserService {    private UserDao userDao;        public User getUser(int id) {        User user = userDao.getUserById(id);        return user;    }    public UserDao getUserDao() {        return userDao;    }    public void setUserDao(UserDao userDao) {        this.userDao = userDao;    }        }

 

然后是UserAction层,依然只有一个方法(省略了一些东西没有介绍,毕竟这里很多东西是struts的,本文重点介绍的是spring整合):

package com.mz.action;import java.util.Map;import org.apache.struts2.interceptor.RequestAware;import com.mz.entity.User;import com.mz.service.UserService;import com.opensymphony.xwork2.ActionSupport;public class UserAction extends ActionSupport implements RequestAware{    private Map<String, Object> request;        private UserService userService;        public String execute() {        int id = 2;        User user = userService.getUser(id);        request.put("user", user);        return SUCCESS;    }    public Map<String, Object> getRequest() {        return request;    }    public void setRequest(Map<String, Object> request) {        this.request = request;    }    public UserService getUserService() {        return userService;    }    public void setUserService(UserService userService) {        this.userService = userService;    }            }

 

 

查找id为2的user并且存储到request中,最后返内部跳转。

最后来看javabean:

User.java:

 

package com.mz.entity;public class User {    private int id;        private String username;        private String password;            private Dept dept;    public int getId() {        return id;    }    public void setId(int 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 Dept getDept() {        return dept;    }    public void setDept(Dept dept) {        this.dept = dept;    }        }

 

User的hibernate映射文件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"><hibernate-mapping >    <class name="com.mz.entity.User"  table="t_user">        <id name="id" column="id">            <generator class="native" />        </id>         <property name="username" column="username" ></property>                <property name="password" column="password"></property>                <many-to-one name="dept" column="deptNo" class="com.mz.entity.Dept"></many-to-one>    </class></hibernate-mapping>

 

Dept.java

package com.mz.entity;public class Dept {    private int deptNo;        private String deptName;    public int getDeptNo() {        return deptNo;    }    public void setDeptNo(int deptNo) {        this.deptNo = deptNo;    }    public String getDeptName() {        return deptName;    }    public void setDeptName(String deptName) {        this.deptName = deptName;    }        }

 

Dept的映射文件Dept.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 content-based discrimination for the        table-per-hierarchy mapping strategy, using a formula discriminator.    --><hibernate-mapping >    <class name="com.mz.entity.Dept"  table="_dept">        <id name="deptNo" column="deptNo">            <generator class="native" />        </id>         <property name="deptName" column="deptName" ></property>            </class></hibernate-mapping>

 

好了,接下来就是配置文件的事情了:

struts.xml:

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"    "http://struts.apache.org/dtds/struts-2.3.dtd"><struts>    <package name="user" namespace="/" extends="struts-default">        <!-- 这里的userAction配置在bean.xml中,struts会自动到bean.xml中寻找对应的类 -->        <action name="user" class="userAction">            <result name="success">/index.jsp</result>        </action>    </package></struts>

 

接着是bean.xml:这里需要配置的有:dao,service,dataSource(数据池),sessionFactory,sessionFactory的事务管理,事务管理器,以及拦截的aop(aop配置在service层,因为service层主要是业务处理,如果业务出现问题,事务就应该回滚,当然,具体的事务配置应该根据项目需求来定!!!!!):

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:p="http://www.springframework.org/schema/p"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:aop="http://www.springframework.org/schema/aop"    xmlns:tx="http://www.springframework.org/schema/tx"    xsi:schemaLocation="        http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd         http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop.xsd        http://www.springframework.org/schema/tx        http://www.springframework.org/schema/tx/spring-tx.xsd">             <!-- 配置dataSource -->            <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >            <property name="driverClass" value="com.mysql.jdbc.Driver"></property>            <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/mybatis"></property>            <property name="user" value="root"></property>            <property name="password" value="111111"></property>            <property name="initialPoolSize" value="3"></property>            <property name="maxPoolSize" value="10"></property>            <property name="acquireIncrement" value="2"></property>            <property name="maxStatements" value="10"></property>            </bean>            <!-- 配置dao -->      <bean id="userDao" class="com.mz.dao.UserDao" >          <property name="sessionFactory" ref="sessionFactory"></property>      </bean>            <!-- 配置action -->      <bean id="userAction" class="com.mz.action.UserAction">          <property name="userService" ref="userService"></property>      </bean>                  <!-- 配置service -->      <bean id="userService" class="com.mz.service.UserService">          <property name="userDao" ref="userDao"></property>      </bean>      <!-- 配置sessionFactory -->      <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">      <!-- 引用配置好了的数据池,需要c3p0的对应jar -->          <property name="dataSource" ref="dataSource"></property>          <!-- hibernate的属性配置 START: -->          <property name="hibernateProperties">               <props>                  <prop key="dialect">org.hibernate.dialect.MySQL5Dialect</prop>                  <prop key="show_sql">true</prop>                  <prop key="hbm2ddl.auto">update</prop>              </props>          </property>          <!-- hibernate的属性配置 END: -->          <!-- hibernate需要做持久化的映射文件 START: -->          <property name="mappingLocations">              <list>                  <value>classpath:com/mz/entity/*.hbm.xml</value>              </list>          </property>          <!-- hibernate需要做持久化的映射文件 END: -->      </bean>            <!-- 配置sessionFactory的事务管理器 -->      <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">          <property  name="sessionFactory" ref="sessionFactory"></property>      </bean>      <!-- 配置事务 -->        <tx:advice id="txAdvice" transaction-manager="txManager">            <tx:attributes>                <tx:method name="*save*" read-only="false"/>                <tx:method name="*get*" read-only="true"></tx:method>            </tx:attributes>        </tx:advice>            <!-- 配置事务aop -->      <aop:config>          <aop:pointcut expression="execution(* com.mz.service.*.*(..))" id="pt"></aop:pointcut>          <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>      </aop:config>  </beans>

 

因为所有的属性都是配置在spring的配置文件中,所以其实不需要hibernate.cfg.xml,

最后就是在web.xml加入struts2的filter和spring的listener,代码如下:

struts2:

    <!--struts2配置 START: -->    <filter>        <filter-name>struts2</filter-name>        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>    </filter>        <filter-mapping>        <filter-name>struts2</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <!-- struts2配置 END: -->

 

spring:

<!-- spring ioc配置 START: -->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:bean.xml</param-value>    </context-param>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <!-- spring ioc配置 END: -->

 

好了,部署到tomcat开始做测试:

index.jsp中加入:

用户名:${user.username }

url:http:localhost:8080/ssh/user(截图是因为加了sessionInViewFilter,请无视)

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相当于我们测试成功了,可是如果我们想要看user对应的部门${user.dept.deptName}),就会报错:

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这是因为hibernate的session的懒加载机制导致的,那么我们可以在web.xml中配置一个filter使得在返回客户端时session一直存在:

<!-- 配置spring的opensessioninview  START:-->    <filter>        <filter-name>openSessionInViewFilter</filter-name>        <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>    </filter>        <filter-mapping>        <filter-name>openSessionInViewFilter</filter-name>        <url-pattern>*.action</url-pattern>    </filter-mapping>    <!-- 配置spring的opensessioninview  END:-->

 

 拦截所有的.action访问,再次访问,如图所示:

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这次就可以显示了,当然还有其他方法,比如(lazy="false",当然这样子每次都要加载出来,这种多对一的还好,如果是1对多,每次都是默认加载出来,对系统的负担会很大,所以不推荐不推荐不推荐!!!!)

ssh整合基本就是这样的,结束!

 

SSH整合(struts2.3.24+hibernate3.6.10+spring4.3.2+mysql5.5+myeclipse8.5+tomcat6+jdk1.6)