Spring3 REST MVC框架,提速你的Web开发

renxiao2003 发表于 2011-12-21 08:44

最近在Java web 项目中需要采用非常简单的REST框架，Struts2、webwork、JSF 经过一番比较，最后选择了Spring3，理由只有一个 “简单，好用，并满足需要”。很久以前就Rod Johnson大叔说 Spring3 全面支持REST风格的Web服务，"We're really seeing extensive interest and growth in REST, and it will have comprehensive support for RESTful Web services," said Johnson，今天亲自尝试了一下，真有点相识恨晚的感觉，如果在这次项目运用没有太大的问题，将来在其他项目会大量运用。
工作原理如图所示： <IMG alt=http://1aqpcg.bay.livefilestore.com/y1p_Q90l9w2JCMiEtgzkdikNQZoyy7Ic7GiCrm8Uk2GUhHZ1C80d7j2Ty4X0IWuydFepV3htprYHjptpEtq561o-7Ok_rkBgoZa/spring_rest_fm.png src="http://1aqpcg.bay.livefilestore.com/y1p_Q90l9w2JCMiEtgzkdikNQZoyy7Ic7GiCrm8Uk2GUhHZ1C80d7j2Ty4X0IWuydFepV3htprYHjptpEtq561o-7Ok_rkBgoZa/spring_rest_fm.png"> *根据HTTP请求的URL，调用相应的DispatcherServlet控制器。 *提供一个视图是作为HTTP响应发送。
页面上最终运行效果，如图所示：
<IMG alt=http://1aqpcg.bay.livefilestore.com/y1pu1qm8gBjr1VJ_9hg2BvILVMcD3tnvyc1WTPRVpkVTHqbP00tQTml9vMDJU_xnyfNrGls2OPS7Df-Z96_zPSMFbqsWXxxUr2t/topic_view.png src="http://1aqpcg.bay.livefilestore.com/y1pu1qm8gBjr1VJ_9hg2BvILVMcD3tnvyc1WTPRVpkVTHqbP00tQTml9vMDJU_xnyfNrGls2OPS7Df-Z96_zPSMFbqsWXxxUr2t/topic_view.png"> 主要代码： 清单1：TopicController package com.javabloger.springrest.action;
import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; 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;
@Controller @RequestMapping("/topic")  //url映射的名称 public class TopicController {
    @RequestMapping(value = "/{id}",method=RequestMethod.GET)     public String helloWorld(             @PathVariable Long id,             HttpServletRequest request,             HttpServletResponse response) {             request.setAttribute("message", "You Input Topci Id is: "+id+"");         return  "topic" ;   // 对应 /WEB-INF/jsp 目录下的 topic.jsp 文件     }             @RequestMapping(value="/add")     public String test(HttpServletRequest request,               HttpServletResponse response){         System.out.println("Hello www.JavaBloger.com ");         request.setAttribute("message", "Hello JavaBloger ! ,@RequestMapping(value='/add')");         return "topic";  // 对应 /WEB-INF/jsp 目录下的 topic.jsp 文件             } }
清单2 :UserController package com.javabloger.springrest.action;
import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import com.javabloger.springrest.pojo.Users;
@Controller @RequestMapping("/user")
public class UserController {      @RequestMapping(value="/login")     public String test(HttpServletRequest request,               HttpServletResponse response,Users  userinfo){   // 非常方便可以直接在方法里面放入对象          if (userinfo.getUsername().equals("username") &&                  userinfo.getPassword().equals("password")              )          {              request.setAttribute("user", userinfo);              return "users/list";   //判断，将跳转不同的页面          }          else{              return "users/loginerr";  //判断，将跳转不同的页面          }     } }
清单3：web.xml    <servlet>         <servlet-name>springmvc</servlet-name>         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>         <load-on-startup>2</load-on-startup>      </servlet>    <servlet-mapping>        <servlet-name>springmvc</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping>   清单4:springmvc-servlet.xml <?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:p="http://www.springframework.org/schema/p"     xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"     xsi:schemaLocation="http://www.springframework.org/schema/beans              http://www.springframework.org/schema/beans/spring-beans-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/tx              http://www.springframework.org/schema/tx/spring-tx-3.0.xsd              http://www.springframework.org/schema/jdbc              http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd">     <bean         class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />     <bean         class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />     <!– 自动搜索@Controller标注的类 –>     <context:component-scan base-package="com.javabloger.springrest.action" />     <bean         class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />     <bean         class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />     <!– Default ViewResolver –>     <bean id="viewResolver"         class="org.springframework.web.servlet.view.InternalResourceViewResolver">         <property name="viewClass"             value="org.springframework.web.servlet.view.JstlView" />         <property name="prefix" value="/WEB-INF/jsp/" />         <property name="suffix" value=".jsp"></property>     </bean>     <bean id="messageSource"         class="org.springframework.context.support.ResourceBundleMessageSource"         p:basename="i18n/messages" /> </beans>
 
<A href="http://javabloger-mini-books.googlecode.com/files/SpringREST.rar" target=_blank><<完整的Spring3 REST代码例子下载>></A>
 一些废话： 我个人非常非常喜欢没有xml配置框架，因为项目一大不仅需要对代码进行维护对xml文件还需要维护相当繁琐，在这个项目中除了采用Spring3的REST特性，还采用了Apache的dbutils对数据进行操作，传说中的SSH轻量级框架是针对EJB和J2EE而言的轻量级，对于上述这样的框架SSH还能称得上“轻量级”吗？也许SSH目前成为了标准，但不再是“轻量级J2EE框架”的代名词！
另外，还有一份专门介绍 Spring3 MVC的资料《Spring 3 MVC CodeMash 2009》，请看幻灯片：
<DIV id=__ss_915100 style="WIDTH: 425px"><EMBED src=http://static.slidesharecdn.com/swf/ssplayer2.swf?doc=spring-mvc-code-mash09a-1231894880943441-1&stripped_title=spring-mvc-code-mash09-presentation width=425 height=355 type=application/x-shockwave-flash allowfullscreen="true" allow.access="always"></EMBED>
 
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Spring3 REST MVC框架,提速你的Web开发