rest服务例子
1、接口类（IHello）

import javax.ws.rs.GET;import javax.ws.rs.Path;import javax.ws.rs.PathParam;import com.bean.Result;@Path("/find/")public interface IHello {/** * 按名称查询  * @param who 名字 * @return */@GET@Path("/findByName/{who}")Result findByName(@PathParam("who")String who);}

2、实现类（HelloImpl）

public class HelloImpl implements IHello {@Overridepublic Result findByName(String who) {       //逻辑实现    }}

3、返回实体（Result）

import java.util.List;import javax.xml.bind.annotation.XmlRootElement;@XmlRootElement(name = "result")public class Result implements Serializable{/** * 返回结果 */private List<User> lstUser;public List<User> getLstUser() {return lstUser;}public void setLstUser(List<User> lstUser) {this.lstUser = lstUser;}}

4、app-rest.xml配置

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jaxrs="http://cxf.apache.org/jaxrs"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://cxf.apache.org/jaxrshttp://cxf.apache.org/schemas/jaxrs.xsd"><import resource="classpath:META-INF/cxf/cxf.xml" /><import resource="classpath:META-INF/cxf/cxf-extension-jaxrs-binding.xml" /><import resource="classpath:META-INF/cxf/cxf-servlet.xml" /><jaxrs:server id="hello" address="/hello"><jaxrs:extensionMappings><entry key="json" value="application/json" /><entry key="xml" value="application/xml" /></jaxrs:extensionMappings><jaxrs:serviceBeans><ref bean="helloImpl" /></jaxrs:serviceBeans></jaxrs:server><bean id="helloImpl" /></beans>

5、依赖jar包

<dependency><groupId>org.apache.cxf</groupId><artifactId>apache-cxf</artifactId><version>2.2.7</version><type>pom</type><scope>compile</scope></dependency><dependency><groupId>javax.ws.rs</groupId><artifactId>jsr311-api</artifactId><version>1.0</version><type>jar</type><scope>compile</scope></dependency><dependency><groupId>commons-httpclient</groupId><artifactId>commons-httpclient</artifactId><version>3.1</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring</artifactId><version>2.5.4</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>2.5.4</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version><type>jar</type><scope>provided</scope></dependency>

6、web.xml配置

<servlet><servlet-name>CXFServlet</servlet-name><servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>CXFServlet</servlet-name><url-pattern>/rest/*</url-pattern></servlet-mapping>

7、调用方法
方法一：

HttpClient httpClient = new HttpClient();GetMethod getMethod = new GetMethod("http://localhost:8080/Test/rest/hello/find/findByName/jack.xml");try {int status = httpClient.executeMethod(getMethod);if (status == 200) {XMLSource xmlSource = new XMLSource(getMethod.getResponseBodyAsStream());Result result = xmlSource.getNode("/", Result.class);System.out.println(result.getLstUser().size());}} catch (Exception e) {e.printStackTrace();}

方法二：

IHello hello = (IHello) JAXRSClientFactory.create("http://localhost:8080/Test/rest/hello", IHello.class);Result result = hello.findByName("jack");System.out.println(result.getLstUser().size());

8、优缺点和注意事项
1.优缺点
优点：跨平台（支持xml和json格式）
缺点：效率低
2.注意事项
参数：如果不是java的基本类型需要封装成javabean，类必须加如下注解：

@XmlRootElement@XmlAccessorType(XmlAccessType.FIELD)public class Param {... }

返回值：如果不是java基本类型需要封装成javabean，需要序列化，属性和类需要加如下注解：

@XmlRootElement(name = "result")public class Result implements Serializable { @Field private String id; ...}