guice整合struts2与jpa，guice的使用（九）

传统我们开发一般使用ssh，但是有些微服务应用的项目我们不需要这么臃肿的框架做开发，于是采用了guice+struts2+guice作为框架组合进行了开发。

先看我们项目引用的jar包:

使用的时候一定要主要jar的版本问题.我项目在jdk1.7上面开发的

然后看一下web.xml的配置:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <filter>
    <filter-name>guiceFilter</filter-name>
    <filter-class>com.google.inject.servlet.GuiceFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>guiceFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <listener>
    <listener-class>com.ming.core.web.listener.GoogleGuiceServletContextListener</listener-class>
  </listener>
  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

然后是struts.xml的配置:

<?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>
    <!-- 引用guice代理 -->
    <constant name="struts.objectFactory" value="guice" />
    <constant name="struts.i18n.encoding" value="UTF-8" />    
    <constant name="struts.enable.DynamicMethodInvocation" value="true"/>
    <include file="com/ming/user/action/userStruts.xml"></include>
</struts>

然后是jpa的persistence.xml的配置:

<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_2_0.xsd"
    version="2.0">
    <persistence-unit name="myunit" transaction-type="RESOURCE_LOCAL">

        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <class>com.ming.user.entity.Student</class>
        <properties>
            <property name="hibernate.connection.provider_class"
                value="org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider" />
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
            <property name="hibernate.c3p0.max_size" value="2" />
            <property name="hibernate.c3p0.min_size" value="1" />
            <property name="hibernate.c3p0.timeout" value="120" />
            <property name="hibernate.c3p0.max_statements" value="100" />
            <property name="hibernate.c3p0.idle_test_period" value="120" />
            <property name="hibernate.c3p0.acquire_increment" value="1" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
            <property name="hibernate.connection.url"
                value="jdbc:mysql://localhost:3306/test?autoReconnect=true&amp;useUnicode=true&amp;characterEncoding=gbk" />
            <property name="hibernate.connection.username" value="root" />
            <property name="hibernate.connection.password" value="root" />
            <property name="hibernate.temp.use_jdbc_metadata_defaults"
                value="false" />
        </properties>

        <!-- <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" 
            /> <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" 
            /> <property name="hibernate.connection.driver" value="com.mysql.jdbc.Driver" 
            /> <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/test?autoReconnect=true&amp;useUnicode=true&amp;characterEncoding=UTF-8" 
            /> <property name="hibernate.connection.user" value="root" /> <property name="hibernate.connection.password" 
            value="root" /> <property name="hibernate.temp.use_jdbc_metadata_defaults" 
            value="false"/> </properties> -->
    </persistence-unit>
</persistence>

然后是module的一些配置:

package com.ming.core.web.listener;

import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.servlet.GuiceServletContextListener;
import com.ming.user.UserModule;

public class GoogleGuiceServletContextListener extends GuiceServletContextListener {

    @Override
    protected Injector getInjector() {
        
        return Guice.createInjector(new UserModule());
        //如果绑定多个module，需要像下面这样就可以了
        //return Guice.createInjector(new UserModule(),new UserModule());
    }

}

package com.ming.user;

import org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter;

import com.google.inject.AbstractModule;
import com.google.inject.Singleton;
import com.google.inject.persist.PersistFilter;
import com.google.inject.persist.jpa.JpaPersistModule;
import com.google.inject.servlet.ServletModule;
import com.google.inject.struts2.Struts2GuicePluginModule;
public class UserModule extends AbstractModule {
    @Override
    protected void configure() {
        install(new ServletModule(){
            @Override
            protected void configureServlets() {
                install(new JpaPersistModule("myunit")); //这个一定要写最前面
                install(new Struts2GuicePluginModule());//这个是struts2与guice组件结合的注入
                bind(StrutsPrepareAndExecuteFilter.class).in(Singleton.class);//这个类似struts2的那个过滤
                filter("/*").through(StrutsPrepareAndExecuteFilter.class);
                filter("/*").through(PersistFilter.class);
            }
        });
    
    }
    
}

以上是几个重要的配置文件。

下面是项目结构:

 注意persistence.xml这个配置文件要放在src下的META-INF下。

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