• 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

        

    <?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>

      2.配置spring随项目启动(web.xml)

      <!-- 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>

    四、单独配置struts2

      1.配置struts2主配置文件(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="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>

      2.配置struts2核心过滤器到web.xml

      <!-- 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>

    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。

      

    ### 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

       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)

            <!-- 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>

       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:

             <!-- 
                 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>

     

    六、单独配置hibernate

      1.导入实体类&orm元数据

      

       举例:User.java

    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 + "]";
        }
    }

       User.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="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>

      2.配置主配置文件(hibernate.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>
        
             <!-- 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>

    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)

        <!-- 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>

    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

        <!-- 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>

      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

        @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;
                }
            });

      (2)findByCriteria

            //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;
            }

      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

        <!-- 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>

      (2)配置织入

        <!-- 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>

      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。

      <!-- 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>

    十二、练习:用户登录

      1.struts.xml核心配置

    <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>

      2.Action代码

    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;
        }
    
    }

      2.Service核心代码

        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;
        }

      3.Dao核心代码

        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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  • 原文地址:https://www.cnblogs.com/xieyupeng/p/7108141.html
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