CXF创建简单的RESTful 风格的webservice

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浅谈REST原理

REST与RPC(Rmote Procedure Call)几乎没有任何关系，RPC是面向服务的,并关注行为和动作；而REST是面向资源的，强调描述应用程序的事物和名词。尽管URL在REST中起了关键作用，但它们仅仅是整体的一部分而已。
更简洁的讲，REST就是将资源的状态以合适的形式从服务端转移到客户端（或者反之）。

【Spring本身也提供对REST的支持，但本章我们只是对CXF的RESTful进行简单应用】

环境

JDK7.0 + Tomcat7.x + Spring4.1.8

项目结构

服务端代码

a） IRESTfulWebService

package com.restful.base.service;import javax.ws.rs.Consumes;import javax.ws.rs.GET;import javax.ws.rs.Path;import javax.ws.rs.PathParam;import javax.ws.rs.core.MediaType;import com.restful.base.vo.LoginUser;public interface IRESTfulWebService {@GET    @Path(value = "/{id}/info")  @Consumes( { MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})String  findById(@PathParam("id") String id);@GET    @Path(value = "/search")  @Consumes( { MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })String  findByAll();@GET    @Path(value = "/{loginId}/user")  @Consumes( { MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})LoginUser  findUserById(@PathParam("loginId") String loginId);}

b） RESTfulWebServiceImp(接口实现类)

package com.restful.base.service.imp;import org.apache.log4j.Logger;import com.restful.base.service.IRESTfulWebService;import com.restful.base.vo.LoginUser;public class RESTfulWebServiceImp implements IRESTfulWebService {private static final Logger log = Logger.getLogger(RESTfulWebServiceImp.class);@Overridepublic String findById(String id) {log.info("---RESTful webservice测试--- param:"+id);return "restful webservice test success! id="+id;}@Overridepublic String findByAll() {log.info("---RESTful webservice测试---");return "restful webservice test success!";}@Overridepublic LoginUser findUserById(String loginId) {log.info("---RESTful webservice测试--- loginid:"+loginId);return this.getUserInfo();}//模拟数据库赋值private LoginUser getUserInfo(){LoginUser user = new LoginUser();user.setId("123");user.setLoginid("login1");user.setPwd("pwd123");user.setRegisterDate("2015-11-04");user.setStatus("1");return user;}}

@Produces

@Produces注释用来指定将要返回给client端的数据标识类型（MIME）。
指定多个MIME类型
@Produces({“application/json”,“application/xml”})

@Consumes
@Consumes与@Produces相反，用来指定可以接受client发送过来的MIME类型，也可以指定多个MIME类型

c） applicationContext-cxf.xml (注册)

<?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:jaxws="http://cxf.apache.org/jaxws"     xmlns:jaxrs="http://cxf.apache.org/jaxrs"    xsi:schemaLocation="http://www.springframework.org/schema/beans                              http://www.springframework.org/schema/beans/spring-beans-4.1.xsd                              http://cxf.apache.org/jaxws                               http://cxf.apache.org/schemas/jaxws.xsd                             http://cxf.apache.org/jaxrs                             http://cxf.apache.org/schemas/jaxrs.xsd "> <!--  日志拦截  --><bean id="inMessageInterceptor" class="org.apache.cxf.interceptor.LoggingInInterceptor" />      <bean id="outMessageInterceptor" class="org.apache.cxf.interceptor.LoggingOutInterceptor"/>          <!-- RESTful webservice -->    <bean id="service" class="com.restful.base.service.imp.RESTfulWebServiceImp" />    <jaxrs:server id="rest1" address="/hello">        <jaxrs:serviceBeans>            <ref bean="service" />        </jaxrs:serviceBeans>        <jaxrs:inInterceptors>             <ref bean="inMessageInterceptor"/>          </jaxrs:inInterceptors>          <jaxrs:outInterceptors>              <ref bean="outMessageInterceptor"/>          </jaxrs:outInterceptors>      </jaxrs:server>   </beans>

访问页面

客户端代码

a）RESTfullCilent

package com.restful.base.webclient;import java.lang.reflect.Field;import javax.ws.rs.core.MediaType;import org.apache.cxf.jaxrs.client.WebClient;import com.restful.base.vo.LoginUser;public class RESTfullCilent {private static final String CATEGORY_URL = "http://localhost:8080/cxfrestful/webservice";   private static final String path1 = "/hello/005/info"; private static final String path2 = "/hello/search"; private static final String path3 = "/hello/log1/user";      public static void main(String[] args) throws Exception {         String str = webClient(path1,String.class);       System.out.println("RESTful 测试1,服务端返回信息:"+str);              str = webClient(path2,String.class);       System.out.println("RESTful 测试2,服务端返回信息:"+str);              LoginUser user = null;       user = webClient(path3,LoginUser.class);              System.out.println("RESTful 测试3,服务端返回信息:");       Field[] file =  LoginUser.class.getDeclaredFields();       for (int i = 0; i < file.length; i++) {       Field f = file[i];           f.setAccessible( true ); // 设置些属性是可以访问的           Object val = f.get(user); // 得到此属性的值         System.out.print(" "+f.getName()+"="+val);       }    }         private static <T> T  webClient(String path,Class<T> c){          T t =null;          WebClient client = WebClient.create(CATEGORY_URL).path(path);          t = client.accept(MediaType.APPLICATION_XML).get(c);          return t;        }}

b）执行客户端结果

代码下载地址：http://download.csdn.net/download/onepersontz/9244683

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