Struts2+jpa+spring的那点点

1.struts.xml零配置+我的拦截器，直接CODING吧。

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    
    <!-- 请求参数的编码方式 -->
    <constant name="struts.i18n.encoding" value="UTF-8" />
    <!-- 该属性指定需要Struts 2处理的请求后缀，该属性的默认值是action，即所有匹配*.action的请求都由Struts2处理。
    如果用户需要指定多个请求后缀，则多个后缀之间以英文逗号（,）隔开。 -->
    <constant name="struts.action.extension" value="action,,"/>
    <!-- 设置浏览器是否缓存静态内容,默认值为true(生产环境下使用),开发阶段最好关闭 -->
    <constant name="struts.serve.static.browserCache" value="false"/>
    <!-- 当struts的配置文件修改后,系统是否自动重新加载该文件,默认值为false(生产环境下使用),开发阶段最好打开 -->
    <constant name="struts.configuration.xml.reload" value="true"/>
    <!-- 开发模式下使用,这样可以打印出更详细的错误信息 -->
    <constant name="struts.devMode" value="true" />
    <!-- 是否开启动态方法调用 -->
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
     <!-- 默认的视图主题 -->
    <constant name="struts.ui.theme" value="simple" />
    <!-- 与spring框架整合 -->
    <constant name="struts.objectFactory" value="spring" />
     <!-- 指定允许上传的文件最大字节数。默认值是2097152(2M) -->
    <constant name="struts.multipart.maxSize" value="2097152"/>
    <!-- 设置上传文件的临时文件夹,默认使用javax.servlet.context.tempdir -->
   <!--  <constant name="struts.multipart.saveDir " value="d:/uploads/tmp"/> -->
   <constant name="struts.convention.result.path" value="/WEB-INF/page/" /> 
   <constant name="struts.custom.i18n.resources" value="globalMessages"/>
   
   <package name="myStruts" extends="struts-default">
    <interceptors>
        <interceptor-stack name="myInterceptor"> 
            <interceptor-ref name="fileUpload">
                <param name="allowedTypes">image/x-png,image/pjpeg,image/gif,image/jpeg,image/png</param>
                <param name="maximumSize">2097152</param>
            </interceptor-ref>
            <interceptor-ref name="defaultStack"/>  
        </interceptor-stack>
    </interceptors>
    <default-interceptor-ref name="myInterceptor"/> 
</package>
</struts>
 

2.strus2 + spring + jpa 的web.xml配置

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<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <!-- ===========对Spring容器实例化 start=========== -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- ===========对Spring容器实例化 end============ -->

    <!-- ===========spring编码过滤器配置 start============ -->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
        
<!-- 解决延迟加载问题 -->

    <filter>
        <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
        <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <filter>
        <!-- 配置Struts2框架的核心Filter -->
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
        
        <!-- 配置Struts2的核心Filter的实现类 -->
        <!-- <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> -->
        <!-- 在web.xml中配置常量的方法，但建议不要在该文件中配置常量
         <init-param> 
             <param-name>struts.custom.il8n.resources</param-name> 
                <param-value>myMessageResource</param-value> 
        </init-param> -->
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <!-- 匹配所有请求 -->
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

3.JPA的配置文件

在src文件夹下新建文件夹META-INF，再在该文件夹下新建persistence.xml文件。配置内容

 

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<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
    http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
    version="1.0">
    
    <!-- name 实体管理器工厂名，用于创建实体管理类对象
        EntityManagerFactory factory = Persistence
                .createEntityManagerFactory("joysport");
        transaction-type 事物类型 配置本地化事物，这里我没有闹清楚
    -->
    <persistence-unit name="joysport" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
            <!-- MySQL数据库方言 -->
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
            <property name="hibernate.max_fetch_depth" value="3" />
            <property name="hibernate.hbm2ddl.auto" value="update" />
            <property name="hibernate.jdbc.fetch_size" value="18" />
            <property name="hibernate.jdbc.batch_size" value="10" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.format_sql" value="true" />
        </properties>
    </persistence-unit>
</persistence>
<!-- 没有和spring整合时，把下面的配置加入到<properties>里 -->
<!--         
            //MySQL数据库驱动
            <property name="hibernate.driverClassName" value="com.mysql.jdbc.Driver"/>
            //数据库用户名
            <property name="hibernate.connection.username" value="root" />
            //密码
            <property name="hibernate.connection.password" value="root" />
            //连接URL
            <property name="hibernate.connection.url" 
            value="jdbc:mysql://localhost:3308/joysport?useUnicode=true&amp;characterEncoding=UTF-8" /> 
-->

4.applicationContext.xml配置(基于spring2.5)

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<?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: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-2.5.xsd
           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

    <!-- 注解支持 -->
    <context:annotation-config />
    <!-- 扫描位置 -->
    <context:component-scan base-package="com" />

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close" >
        <property name="driverClassName" value="com.mysql.jdbc.Driver" /><!-- org.gjt.mm.mysql.Driver -->
        <property name="url"
            value="jdbc:mysql://localhost:3308/enjoysport?useUnicode=true&amp;characterEncoding=UTF-8" /><!-- mpros -->
        <property name="username" value="root" />
        <property name="password" value="admin" />
        <!-- 连接池启动时的初始值 -->
        <property name="initialSize" value="1" />
        <!-- 连接池的最大值 -->
        <property name="maxActive" value="500" />
        <!-- 最大空闲值.当经过一个高峰时间后，连接池可以慢慢将已经用不到的连接慢慢释放一部分，一直减少到maxIdle为止 -->
        <property name="maxIdle" value="2" />
        <!-- 最小空闲值.当空闲的连接数少于阀值时，连接池就会预申请去一些连接，以免洪峰来时来不及申请 -->
        <property name="minIdle" value="1" />
    </bean>
    
    <!-- Spring集成JPA -->
    <bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
        <property name="loadTimeWeaver">
            <bean
                class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
        </property>
    </bean>
    <!-- Spring针对Hibernate的事务管理器 -->
    <bean id="txManager"
        class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>
    <!-- 事物注解支持 -->
    <tx:annotation-driven transaction-manager="txManager" />
</beans>

5.我常用的Action的注解

1.@ParentPackage("struts-default")<--->等价于struts.xml的 extends="struts-default",通常此处可配置拦截器，

即配置@ParentPackage("myStruts"),既可以拦截一下Action了。

2.@Namespace,命名空间

3.@Results({@Result(name="success",loction="index.jsp")})

4.@Action("value="/main")

6.配置返回json数据格式，通过struts自动封装对象，产生json对象。

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@ParentPackage("json-default")
@Namespace("/control/client/product")
@Results({})
....
@Action(value="/getproducts",results={ @Result(name="products", 
            type = "json")})
    public String getproducts() {
....
}