SSH

 

JAVAEE——SSH三大框架整合(spring+struts2+hibernate)

 

一、整合原理

 

二、导包(41个)

  1.hibernate

  (1)hibernate/lib/required

  

  (2)hibernate/lib/jpa | java persist api java的持久化规范(接口)

  

  (3)数据库驱动

  

  2.struts2

  (1)struts-blank.war/WEB-INF/lib/*

   注意:javassist-3.18.1-GA.jar包与hibernate中的重复(只保留高版本即可)

  

  (2)struts整合spring插件包

   注意:这个包一旦导入,那么struts2在启动时就会寻找spring容器.找不到将会抛出异常

  

  3.spring

  (1)基本:4+2

   core | beans | context | expression | logging | log4j

  (2)整合web:web包

   spring-web

  (3)整合aop:4个

   spring-aop | spring-aspect | aop联盟 | aopweaving

  (4)整合Hibernate和事务:4个

   spring-jdbc | spring-tx | c3p0 | spring-orm

  (5)整合junit4测试:test包

   spring-test

  4.标签库

    standard.jar | jstl-1.2.jar

三、单独配置spring容器

  1.创建applicationContext.xml,并导入约束(4个) beans | context | aop | tx

    

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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://www.springframework.org/schema/beans" 
        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-4.2.xsd 
                            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd 
                            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd 
                            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd ">

    <bean name="userAction" class="cn.xyp.web.action.UserAction"></bean>

</beans>
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  2.配置spring随项目启动(web.xml)

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  <!-- 让spring随web启动而创建的监听器 -->
  <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 配置spring配置文件位置参数 -->
  <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
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四、单独配置struts2

  1.配置struts2主配置文件(struts.xml)

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<?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="crm" namespace="/" extends="struts-default">
        <action name="UserAction_*" class="cn.xyp.web.action.UserAction" method="{1}">
            <result name="success">/success.jsp</result>
        </action>
    </package>
</struts>
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  2.配置struts2核心过滤器到web.xml

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  <!-- struts2核心过滤器 -->
  <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>
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五、struts2与spring整合

  1.导包(已经导入)

   struts2-spring-plugin-2.3.24.jar

  2.配置常量

   查看默认配置文件从31行开始找到要配置的变量。

  

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### if specified, the default object factory can be overridden here
### Note: short-hand notation is supported in some cases, such as "spring"
###       Alternatively, you can provide a com.opensymphony.xwork2.ObjectFactory subclass name here
# struts.objectFactory = spring

### specifies the autoWiring logic when using the SpringObjectFactory.
### valid values are: name, type, auto, and constructor (name is the default)
struts.objectFactory.spring.autoWire = name
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   添加常量到struts.xml

    <!-- #  struts.objectFactory = spring    将action的创建交给spring容器    
            struts.objectFactory.spring.autoWire = name spring负责装配Action依赖属性
            -->
    <constant name="struts.objectFactory" value="spring"></constant>

  3.整合方案1:struts2自己创建action,spring负责组装依赖属性(了解)

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        <!-- 整合方案1:class属性上仍然配置action的完整类名
                struts2仍然创建action,由spring负责组装Action中的依赖属性
         -->
        <action name="UserAction_*" class="cn.xyp.web.action.UserAction" method="{1}" >
            <result name="toHome" type="redirect" >/index.htm</result>
            <result name="error" >/login.jsp</result>
        </action>
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   不推荐理由:最好由spring完整管理action的生命周期.spring中功能才应用到Action上.

  4.整合方案2:spring负责创建action以及组装.(推荐)

   applicationContext.xml:

    <!-- action -->
    <!-- 注意:Action对象作用范围一定是多例的.这样才符合struts2架构 -->
    <bean name="userAction" class="cn.itcast.web.action.UserAction" scope="prototype" >
        <property name="userService" ref="userService" ></property>
    </bean>

   struts.xml:

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         <!-- 
             整合方案2:class属性上填写spring中action对象的BeanName
                 完全由spring管理action生命周期,包括Action的创建
                 注意:需要手动组装依赖属性
          -->
        <action name="UserAction_*" class="userAction" method="{1}" >
            <result name="toHome" type="redirect" >/index.htm</result>
            <result name="error" >/login.jsp</result>
        </action>
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六、单独配置hibernate

  1.导入实体类&orm元数据

  

   举例:User.java

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package cn.xyp.web.domain;

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

public class User {
    private Long user_id;
    private String user_code;
    private String user_name;
    private String user_password;
    private Character user_state;
    public Long getUser_id() {
        return user_id;
    }
    public void setUser_id(Long user_id) {
        this.user_id = user_id;
    }
    public String getUser_code() {
        return user_code;
    }
    public void setUser_code(String user_code) {
        this.user_code = user_code;
    }
    public String getUser_name() {
        return user_name;
    }
    public void setUser_name(String user_name) {
        this.user_name = user_name;
    }
    public String getUser_password() {
        return user_password;
    }
    public void setUser_password(String user_password) {
        this.user_password = user_password;
    }
    public Character getUser_state() {
        return user_state;
    }
    public void setUser_state(Character user_state) {
        this.user_state = user_state;
    }
    @Override
    public String toString() {
        return "User [user_id=" + user_id + ", user_code=" + user_code + ", user_name=" + user_name + ", user_password="
                + user_password + "]";
    }
}
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   User.hbm.xml:

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<?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="cn.xyp.domain" >
    <class name="User" table="sys_user" >
        <id name="user_id"  >
            <generator class="native"></generator>
        </id>
        <property name="user_code"  ></property>
        <property name="user_name"  ></property>
        <property name="user_password"  ></property>
        <property name="user_state"  ></property>
    
    </class>
</hibernate-mapping>
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  2.配置主配置文件(hibernate.xml)

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<?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>
    
         <!-- 数据库驱动 -->
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
         <!-- 数据库url -->
        <property name="hibernate.connection.url">jdbc:mysql:///crm_32</property>
         <!-- 数据库连接用户名 -->
        <property name="hibernate.connection.username">root</property>
         <!-- 数据库连接密码 -->
        <property name="hibernate.connection.password">1234</property>
        <!-- 数据库方言
            注意: MYSQL在选择方言时,请选择最短的方言.
         -->
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
        
        
        <!-- 将hibernate生成的sql语句打印到控制台 -->
        <property name="hibernate.show_sql">true</property>
        <!-- 将hibernate生成的sql语句格式化(语法缩进) -->
        <property name="hibernate.format_sql">true</property>
        <!-- 
        自动导出表结构. 自动建表
         -->
        <property name="hibernate.hbm2ddl.auto">update</property>
         
         <!-- 引入实体配置文件 -->
        <mapping resource="cn/xyp/domain/Customer.hbm.xml" />
        <mapping resource="cn/xypt/domain/LinkMan.hbm.xml" />
        <mapping resource="cn/xyp/domain/User.hbm.xml" />
        
    </session-factory>
</hibernate-configuration>
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七、spring整合hibernate

  1.整合原理

   将sessionFactory对象交给spring容器管理

  2.在spring中配置sessionFactory

  (1)配置方案一:(了解)

    <!-- 加载配置方案1:仍然使用外部的hibernate.cfg.xml配置信息 -->
    <bean name="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean" >
        <property name="configLocation" value="classpath:hibernate.cfg.xml" ></property>
    </bean> 

  (2)配置方案二:(推荐)

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    <!-- 加载配置方案2:在spring配置中放置hibernate配置信息 -->
    <bean name="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean" >
        <!-- 将连接池注入到sessionFactory, hibernate会通过连接池获得连接 -->
        <property name="dataSource" ref="dataSource" ></property>
        <!-- 配置hibernate基本信息 -->
        <property name="hibernateProperties">
            <props>
                <!--  必选配置 -->
                <prop key="hibernate.connection.driver_class" >com.mysql.jdbc.Driver</prop>
                <prop key="hibernate.connection.url" >jdbc:mysql:///crm_32</prop>
                <prop key="hibernate.connection.username" >root</prop>
                <prop key="hibernate.connection.password" >1234</prop> 
                <prop key="hibernate.dialect" >org.hibernate.dialect.MySQLDialect</prop>
                
                <!--  可选配置 -->
                <prop key="hibernate.show_sql" >true</prop>
                <prop key="hibernate.format_sql" >true</prop>
                <prop key="hibernate.hbm2ddl.auto" >update</prop>
            </props>
        </property>
        <!-- 引入orm元数据,指定orm元数据所在的包路径,spring会自动读取包中的所有配置 -->
        <property name="mappingDirectoryLocations" value="classpath:cn/itcast/domain" ></property>
    </bean>
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八、spring整合c3p0连接池

  1.配置db.properties

jdbc.jdbcUrl=jdbc:mysql:///xyp_crm
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=123456

  2.引入连接池到spring中

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    <!-- 读取db.properties文件 -->
    <context:property-placeholder location="classpath:db.properties" />
    <!-- 配置c3p0连接池 -->
    <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}" ></property>
        <property name="driverClass" value="${jdbc.driverClass}" ></property>
        <property name="user" value="${jdbc.user}" ></property>
        <property name="password" value="${jdbc.password}" ></property>
    </bean>
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  3.将连接池注入给SessionFactory

    <bean name="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean" >
        <!-- 将连接池注入到sessionFactory, hibernate会通过连接池获得连接 -->
        <property name="dataSource" ref="dataSource" ></property>

 

九、spring整合hibernate环境操作数据库

  1.Dao类创建:继承HibernateDaoSupport

   注意:项目中要确保使用统一版本。

  

//HibernateDaoSupport 为dao注入sessionFactory
public class UserDaoImpl extends HibernateDaoSupport implements UserDao {

  2.hibernate模板的操作

  (1)execute

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    @Override
    public User getByUserCode(final String usercode) {
        //HQL
        return getHibernateTemplate().execute(new HibernateCallback<User>() {
            @Override
            public User doInHibernate(Session session) throws HibernateException {
                    String hql = "from User where user_code = ? ";
                    Query query = session.createQuery(hql);
                    query.setParameter(0, usercode);
                    User user = (User) query.uniqueResult();
                return user;
            }
        });
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  (2)findByCriteria

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        //Criteria
        DetachedCriteria dc = DetachedCriteria.forClass(User.class);
        
        dc.add(Restrictions.eq("user_code", usercode));
        
        List<User> list = (List<User>) getHibernateTemplate().findByCriteria(dc);
            
        if(list != null && list.size()>0){
            return list.get(0);
        }else{
            return null;
        }
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  3.spring中配置dao

    <!-- Dao -->
    <bean name="userDao" class="cn.xyp.dao.impl.UserDaoImpl" >
        <!-- 注入sessionFactory -->
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

 

十、spring的aop事务

  1.准备工作

    <!-- 核心事务管理器 -->
    <bean name="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager" >
        <property name="sessionFactory" ref="sessionFactory" ></property>
    </bean>

  2.xml配置aop事务

  (1)配置通知

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    <!-- 配置通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager" >
        <tx:attributes>
            <tx:method name="save*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="persist*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="update*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="modify*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="delete*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="remove*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="get*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true" />
            <tx:method name="find*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true" />
        </tx:attributes>
    </tx:advice>
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  (2)配置织入

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    <!-- 配置将通知织入目标对象
    配置切点
    配置切面 -->
    <aop:config>
        <aop:pointcut expression="execution(* cn.itcast.service.impl.*ServiceImpl.*(..))" id="txPc"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPc" />
    </aop:config>
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  3.注解配置aop事务

  (1)开启注解事务

    <!-- 开启注解事务 -->
    <tx:annotation-driven transaction-manager="transactionManager" />

  (2)Service类中使用注解

@Transactional(isolation=Isolation.REPEATABLE_READ,propagation=Propagation.REQUIRED,readOnly=true)
public class UserServiceImpl implements UserService{
    @Override
    @Transactional(isolation=Isolation.REPEATABLE_READ,propagation=Propagation.REQUIRED,readOnly=false)
    public void saveUser(User u) {
        ud.save(u);
    }

 

十一、扩大session作用范围

  1.配置filter

   为了避免使用懒加载时出现no-session问题.需要扩大session的作用范围。

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  <!-- 扩大session作用范围
      注意: 任何filter一定要在struts的filter之前调用
      因为struts是不会放行的
   -->
   <filter>
      <filter-name>openSessionInView</filter-name>
      <filter-class>org.springframework.orm.hibernate5.support.OpenSessionInViewFilter</filter-class>
  </filter>

  <filter-mapping>
      <filter-name>openSessionInView</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>
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十二、练习:用户登录

  1.struts.xml核心配置

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<struts>
    <!-- #  struts.objectFactory = spring    将action的创建交给spring容器    
            struts.objectFactory.spring.autoWire = name spring负责装配Action依赖属性
            -->
    <constant name="struts.objectFactory" value="spring"></constant>

    <package name="crm" namespace="/" extends="struts-default" >
        <global-exception-mappings>
            <exception-mapping result="error" exception="java.lang.RuntimeException"></exception-mapping>
        </global-exception-mappings>

         <!-- 
             整合方案:class属性上填写spring中action对象的BeanName
                 完全由spring管理action生命周期,包括Action的创建
                 注意:需要手动组装依赖属性
          -->
        <action name="UserAction_*" class="userAction" method="{1}" >
            <result name="toHome" type="redirect" >/index.htm</result>
            <result name="error" >/login.jsp</result>
        </action>
    </package>
</struts>
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  2.Action代码

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public class UserAction extends ActionSupport implements ModelDriven<User> {
    private User user = new User();
    
    private UserService userService ;
    
    public void setUserService(UserService userService) {
        this.userService = userService;
    }

    public String login() throws Exception {
            //1 调用Service执行登陆逻辑
            User u = userService.getUserByCodePassword(user);
            //2 将返回的User对象放入session域
            ActionContext.getContext().getSession().put("user", u);
            //3 重定向到项目首页
        return "toHome";
    }

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

}
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  2.Service核心代码

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    public User getUserByCodePassword(User u) {
        // 1 根据登陆名称查询登陆用户
        User existU = ud.getByUserCode(u.getUser_code());
        // 2 判断用户是否存在.不存在=>抛出异常,提示用户名不存在
        if (existU == null) {
            throw new RuntimeException("用户名不存在!");
        }
        // 3 判断用户密码是否正确=>不正确=>抛出异常,提示密码错误
        if (!existU.getUser_password().equals(u.getUser_password())) {
            throw new RuntimeException("密码错误!");
        }
        // 4 返回查询到的用户对象
        return existU;
    }
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  3.Dao核心代码

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    public User getByUserCode(final String usercode) {

        //Criteria
        DetachedCriteria dc = DetachedCriteria.forClass(User.class);
        dc.add(Restrictions.eq("user_code", usercode));
        
        List<User> list = (List<User>) getHibernateTemplate().findByCriteria(dc);
        
        if(list != null && list.size()>0){
            return list.get(0);
        }else{
            return null;
        }
        
    }
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posted @ 2017-07-18 14:14  超重语言  阅读(201)  评论(0编辑  收藏  举报