使用Apache CXF搭建REST风格的Web Service

奇忠诚

　　1）编写domain实体类


package com.domain;
import java.io.Serializable;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name="UserInfo")
public class User implements Serializable,Comparable<User>{
/**
*
*/
private static final long serialVersionUID = 1L;
private int id;
private String name;
private String email;
private String address;
public User(){}
@XmlElement
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
@XmlElement
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@XmlElement
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@XmlElement
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return this.name+","+this.email+","+this.address;
}
@Override
public int compareTo(User other) {
return this.id - other.id;
}
}
　　2）业务处理接口


package com.service;
import com.domain.User;
public interface IUserService {
public User getUserById(int id);
}
　　3）业务处理实现类

package com.service;
import com.domain.User;
public class UserService implements IUserService{
public User getUserById(int id){
User user = new User();
user.setId(1);
user.setName("Rickesy");
user.setAddress("china");
user.setEmail("Rickesy@163.com");
return user;
};
}
　　3）Web Service接口


package com.rest;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import com.domain.User;
@Path(value="/")
public interface IRESTService {
@GET
@Path("user/{id}")
@Produces({MediaType.APPLICATION_XML,
MediaType.APPLICATION_JSON})
public User getUserById(@PathParam("id") int id);
}
　　4）Web Service实现类


package com.rest;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import com.domain.User;
import com.service.UserService;
@Path(value="/")
public class RESTService implements IRESTService{
private User user;
private IUserService userService;
@GET
@Path("user/{id}")
@Produces({MediaType.APPLICATION_XML,
MediaType.APPLICATION_JSON})
public User getUserById(@PathParam("id") int id){
return userService.getUserById(id);
}
public IUserService getUserService() {
return userService;
}
public void setUserService(IUserService userService) {
this.userService = userService;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}   
}
　　5）配置applicationContext.xml文件


<?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: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-3.1.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">
<import resource="classpath:META-INF/cxf/cxf.xml"/>
<import resource="classpath:META-INF/cxf/cxf-servlet.xml"/>
<bean id="user" class="com.domain.User"></bean>
<bean id="userService" class="com.service.UserService"></bean>
<bean id="restService" class="com.rest.RESTService">
<property name="user" ref="user"></property>
<property name="userService" ref="userService"></property>
</bean>
<jaxrs:server id="restServiceContainer" address="/rest">
<jaxrs:serviceBeans>
<ref bean="restService" />
</jaxrs:serviceBeans>
<jaxrs:extensionMappings>
<entry key="json" value="application/json" />
<entry key="xml" value="application/xml" />
</jaxrs:extensionMappings>
<jaxrs:languageMappings>
<entry key="en" value="en-gb"/>  
</jaxrs:languageMappings>
</jaxrs:server>
</beans>
　　6）配置web.xml


<listener>
<listene-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<servlet>
<servlet-name>CXFServlet</servlet-name>
<servlet-class>
org.apache.cxf.transport.servlet.CXFServlet
</servlet-class>
</servlet>
<servlet-mapping>   
<servlet-name>CXFServlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
　　7）客户端测试


package com.client;
import javax.ws.rs.core.MediaType;
import org.apache.cxf.jaxrs.client.WebClient;
public class Client {
static WebClient client = WebClient.create(
"http://localhost:8080/RESTWebService/rest");
public static void main(String[] args) {
User user = client.path("/user/{id}",
1).accept(MediaType.APPLICATION_XML).get(User.class);
System.out.println(user);
}
}