GAE集成SpringMVC

 

所使用技术和工具：

1. Eclipse-Jee-Juno (version 4.2)
2. JDK 1.6
3. Google Plugin for Eclipse
4. Google App Engine Java SDK 1.7.4
5. Spring 3.1.0

备注：

在学习本教程以前，您可能须要了解SpringMVC开发技术，一样你也可能须要阅读下我上一篇博文 [GAE 教程] 初识GAE

 

• 项目集成Spring 3.0 MVC REST 须要依赖如下jar
  1. aopalliance-1.0.jar

  2. commons-logging-1.1.1.jar

  3. spring-aop-3.1.0.RELEASE.jar

  4. spring-asm-3.1.0.RELEASE.jar

  5. spring-beans-3.1.0.RELEASE.jar

  6. spring-context-3.1.0.RELEASE.jar

  7. spring-context-support-3.1.0.RELEASE.jar

  8. spring-core-3.1.0.RELEASE.jar

  9. spring-expression-3.1.0.RELEASE.jar

  10. spring-web-3.1.0.RELEASE.jar

  11. spring-webmvc-3.1.0.RELEASE.jar

 

• 准备好Jar包之后，将这些jar包拷贝到项目的war/WEB-INF/lib 中

 

 

• 导入后，经过Configure Build Path…配置引用下这些包就行了

 

 

 

• 配置SpringMVC，首先咱们须要在war/WEB-INF/ 下建立一个Spring XML bean的配置文件 {YourServletName}-servlet.xml，用来定义bean 和 试图解析器

 1 <beans xmlns="http://www.springframework.org/schema/beans"
 2     xmlns:context="http://www.springframework.org/schema/context"
 3     xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xsi:schemaLocation="  5         http://www.springframework.org/schema/beans       6         http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  7         http://www.springframework.org/schema/context   8         http://www.springframework.org/schema/context/spring-context-3.0.xsd  9         http://www.springframework.org/schema/mvc 10         http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
11 
12     <!-- 对web包中的全部类进行扫描，以完成bean的建立和自动依赖注入功能 -->
13     <context:component-scan base-package="com.javawill" />
14 
15     <!-- 对模型视图的名称的解析 -->
16     <bean 17         class="org.springframework.web.servlet.view.InternalResourceViewResolver">
18         <property name="prefix">
19             <value>/WEB-INF/jsp/</value>
20         </property>
21         <property name="suffix">
22             <value>.jsp</value>
23         </property>
24     </bean>
25 
26 </beans>

 

• 同时，咱们须要将Spring 集成到咱们的web.xml中，有的人可能IDE没法显示web.xml的内容，只须要刷新web.xml 文件（注意是文件，不是内容）

 1 <?xml version="1.0" encoding="utf-8" standalone="no"?>
 2 <web-app xmlns="http://java.sun.com/xml/ns/javaee"
 3     xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
 4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5"
 5     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 6     <!-- spring mvc的servlet，加载WEB-INF/baifeibai-servlet.xml的配置文件，以启动Spring MVC模块 -->
 7     <servlet>
 8         <servlet-name>baifeibai</servlet-name>
 9         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
10         <load-on-startup>1</load-on-startup>
11     </servlet>
12     <servlet-mapping>
13         <servlet-name>baifeibai</servlet-name>
14         <url-pattern>*.do</url-pattern>
15     </servlet-mapping>
16     <context-param>
17         <param-name>contextConfigLocation</param-name>
18         <param-value>/WEB-INF/baifeibai-servlet.xml</param-value>
19     </context-param>
20     <!-- spring容器启动监听器 -->
21     <listener>
22         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
23     </listener>
24     <welcome-file-list>
25         <welcome-file>index.html</welcome-file>
26     </welcome-file-list>
27     <servlet>
28         <servlet-name>SystemServiceServlet</servlet-name>
29         <servlet-class>com.google.api.server.spi.SystemServiceServlet</servlet-class>
30         <init-param>
31             <param-name>services</param-name>
32             <param-value />
33         </init-param>
34     </servlet>
35     <servlet-mapping>
36         <servlet-name>SystemServiceServlet</servlet-name>
37         <url-pattern>/_ah/spi/*</url-pattern>
38     </servlet-mapping>
39 </web-app>

 

• 如今咱们看看咱们项目的新结构，并实现一个简单的业务，经过Controller 定义一个变量值，并在JSP上展示出来

   

   

• 编写Controller.java

 1 /**
 2  * Create by Javawill in 2013-1-10  3  */
 4 package com.javawill.example.spring.controller;  5 
 6 import org.springframework.stereotype.Controller;  7 import org.springframework.ui.Model;  8 import org.springframework.web.bind.annotation.RequestMapping;  9 
10 /**
11  * GAE集成SpringMVC Controller 实例 12  * @author  <a href="mailto:iflytekwill@qq.com">Javawill</a> 13  * @version 1.0 14  */
15 @Controller 16 public class SpringController { 17     @RequestMapping("/example/welcome.do") 18     public String Welcome(Model model, String inputval){ 19         if ( inputval == null || ("".equals(inputval))) { 20             inputval = "您能够试试在下面的输入框输入值，测试下Spring的传参！"; 21         } else { 22             inputval = "您以前输入的值为:" + inputval; 23         } 24         model.addAttribute("hello", "您好，欢迎您来到GAE+SpringMVC学习项目演示网站！"); 25         model.addAttribute("msg", inputval); 26         return "example/spring/welcome"; 27     } 28 }

 

• 用于展示的JSP页面代码

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 5 <html>
 6 <head>
 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 8 <title>Javawill 演示案例</title>
 9 </head>
10 <body>
11     <h2>${hello }</h2>
12     ${msg } 13     <form action="<c:url  value='/example/welcome.do'  />" method="post">
14         输入值:<input id="inputval" name="inputval" /> 
15         <input type="submit" value="肯定" />
16     </form>
17 
18 </body>
19 </html>

 

• 接下来，咱们远程部署到Google 云端，访问下 http://www.baifeibai.com