前面介绍过Spring的MVC结合不同的view显示不同的数据,如:结合json的view显示json、结合xml的view显示xml文档。那么这些数据除了在WebBrowser中用JavaScript来调用以外,还可以用远程服务器的Java程序、C#程序来调用。也就是说现在的程序不仅在BS中能调用,在CS中同样也能调用,不过你需要借助RestTemplate这个类来完成。RestTemplate有点类似于一个WebService客户端请求的模版,可以调用http请求的WebService,并将结果转换成相应的对象类型。至少你可以这样理解!
上一次博文介绍SpringMVC结合不同的View,显示不同的数据。http://www.cnblogs.com/hoojo/archive/2011/04/29/2032571.html
Email:hoojo_@126.com
Blog:http://blog.csdn.net/IBM_hoojo
一、准备工作
1、 下载jar包
spring各版本jar下载地址:http://ebr.springsource.com/repository/app/library/detail?name=org.springframework.spring
相关的依赖包也可以在这里找到:http://ebr.springsource.com/repository/app/library
2、 需要jar包如下
3、 当前工程的web.xml配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<!-- 配置Spring核心控制器 -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/dispatcher.xml</param-value>
</init-param>
<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>
4、 WEB-INF中的dispatcher.xml配置
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.0.xsd">
<context:component-scan base-package="com.hoo.*">
<!-- 忽略这个类 -->
<context:exclude-filter type="assignable" expression="com.hoo.client.RESTClient"/>
</context:component-scan>
<!-- annotation的方法映射适配器 -->
<bean id="handlerAdapter" class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
<!-- xml视图,XStreamMarshaller,可以转换任何形式的java对象 -->
<bean name="xStreamMarshallingView" class="org.springframework.web.servlet.view.xml.MarshallingView">
<property name="marshaller">
<bean class="org.springframework.oxm.xstream.XStreamMarshaller">
<!-- 为了初始化XStreamMarshaller,这个类会把我们接口中得到结果以XML文档形式展现出来 -->
<property name="autodetectAnnotations" value="true"/>
</bean>
</property>
</bean>
<!-- 视图解析器,根据视图的名称new ModelAndView(name),在配置文件查找对应的bean配置 -->
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver">
<property name="order" value="3"/>
</bean>
<!-- annotation默认的方法映射适配器 -->
<bean id="handlerMapping" class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
<property name="order" value="1" />
</bean>
</beans>
5、 启动后,可以看到index.jsp 没有出现异常或错误。那么当前SpringMVC的配置就成功了。
二、REST控制器实现
REST控制器主要完成CRUD操作,也就是对于http中的post、get、put、delete。
还有其他的操作,如head、options、trace。
具体代码:
package com.hoo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
/**
* <b>function:</b>SpringMVC REST示例
* @author hoojo
* @createDate 2011-6-9 上午11:34:08
* @file RESTController.java
* @package com.hoo.controller
* @project SpringRestWS
* @blog http://blog.csdn.net/IBM_hoojo
* @email hoojo_@126.com
* @version 1.0
*/
@RequestMapping("/restful")
@Controller
public class RESTController {
@RequestMapping(value = "/show", method = RequestMethod.GET)
public ModelAndView show() {
System.out.println("show");
ModelAndView model = new ModelAndView("xStreamMarshallingView");
model.addObject("show method");
return model;
}
@RequestMapping(value = "/get/{id}", method = RequestMethod.GET)
public ModelAndView getUserById(@PathVariable String id) {
System.out.println("getUserById-" + id);
ModelAndView model = new ModelAndView("xStreamMarshallingView");
model.addObject("getUserById method -" + id);
return model;
}
@RequestMapping(value = "/add", method = RequestMethod.POST)
public ModelAndView addUser(String user) {
System.out.println("addUser-" + user);
ModelAndView model = new ModelAndView("xStreamMarshallingView");
model.addObject("addUser method -" + user);