Spring on GAE

sikeh

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2009-04 ( 1)
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GAE Spring Java Web Google

The simplest annotated Spring MVC app on GAE

prerequisite:
1. Google App Engine account enabled
2. Google Plugin for Eclipse ready

Here is the preview of the project structure

Create a Google Web Application Project & follow these steps:
1) Copy & paste following libraries to /WEB-INF/lib/, and add to Java build path:

spring-core.jar
spring-beans.jar
spring-context.jar
spring-web.jar
spring-webmvc.jar
// don't use spring.jar (all-in-one jar), it will throw java.lang.NoClassDefFoundError: javax/naming/NamingException,
probably due to the fact that GAE/Java doesn't support EJB (javax.naming?)

jstl.jar
standard.jar
// gonna use JSTL in View

2) modify the auto-generated web.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app xmlns="http://java.sun.com/xml/ns/javaee" version="2.5">
	<servlet>
		<servlet-name>dispatcher</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>dispatcher</servlet-name>
		<url-pattern>*.do</url-pattern>
	</servlet-mapping>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>

3) Create dispatcher-servlet.xml under /WEB-INF/

<?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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

	<context:component-scan base-package="sikeh" />

	<bean id="viewResolver"
		class="org.springframework.web.servlet.view.InternalResourceViewResolver"
		p:prefix="/WEB-INF/views/" p:suffix=".jsp" />

</beans>

4) Create the index.jsp

<?xml version="1.0" encoding="ISO-8859-1" ?>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
	pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Insert title here</title>
</head>
<body>
<form action="test.do" method="post">your name: <br />
<input type="text" name="name" /> <br />
<input type="submit" value="Submit" /></form>

</body>
</html>

5) Create the Controller, in this case sikeh.TestController

package sikeh;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class TestController {

	@RequestMapping(value = "/test.do", method = RequestMethod.POST)
	public String get(String name, Model model) {
		model.addAttribute("name", name);
		return "test";
	}
}

6) Create the View, in this case test.jsp under /WEB-INF/views/

<?xml version="1.0" encoding="ISO-8859-1" ?>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
	pageEncoding="ISO-8859-1"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ page isELIgnored="false"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Insert title here</title>
</head>
<body>
Hi,
<c:out value="${name}" />
<br />
It works!
<br />
<a href="/index.jsp">Back</a>
</body>
</html>

// please notice isELIgnored must be set to enable JSTL in GAE/Java

Congrats, depoly to GAE and have fun

Live demo -> http://sike-java.appspot.com/

查看图片附件

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2009-04-09 05:57
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7 楼 yuyanshan 2010-09-27

// don't use spring.jar (all-in-one jar), it will throw java.lang.NoClassDefFoundError: javax/naming/NamingException,
probably due to the fact that GAE/Java doesn't support EJB (javax.naming?)
我的程序在本地没有问题，但是上传上去就报这个，我用的包是2.5.6,你用的是3.0吗？

6 楼蓝月鸟 2009-05-29

lw223 写道

qsrock 写道
看来看去都是springMVC，究竟和GAE有什么关系呢？？

GAE上可以用springMVC，这下明白了吧。

什么VC不VC的，只要那些个包的规范符合就行了嘛..

5 楼 sikeh 2009-04-12

这里给出了GAE支持的框架、语言、库
http://groups.google.com/group/google-appengine-java/web/will-it-play-in-app-engine

4 楼 lw223 2009-04-11

qsrock 写道

看来看去都是springMVC，究竟和GAE有什么关系呢？？

GAE上可以用springMVC，这下明白了吧。

3 楼 qsrock 2009-04-10

看来看去都是springMVC，究竟和GAE有什么关系呢？？

2 楼 wangxin0072000 2009-04-09

支持，马上去试。留名

1 楼 yanhua 2009-04-09

太棒了，支持

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