jersey概览

概览

服务端

相关库

• 标准的Java Web项目
• asm-3.1.jar
• jersey-client-1.17.1.jar
• jersey-core-1.17.1.jar
• jersey-server-1.17.1.jar
• jersey-servlet-1.17.1.jar
• jsr311-api-1.1.1.jar

web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
	id="WebApp_ID" version="2.5">  
  <display-name>RESTfulWS</display-name>  
  <servlet>  
    <servlet-name>Jersey REST Service</servlet-name>  
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>  
    <init-param>  
      <param-name>com.sun.jersey.config.property.packages</param-name>  
      <param-value>com.eviac.blog.restws</param-value>  
    </init-param>  
    <load-on-startup>1</load-on-startup>  
  </servlet>  
  <servlet-mapping>  
    <servlet-name>Jersey REST Service</servlet-name>  
    <url-pattern>/rest/*</url-pattern>  
  </servlet-mapping>  
</web-app>

业务逻辑

import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

/**
 * 
 * @author pavithra
 * 
 */

// @Path here defines class level path. Identifies the URI path that 
// a resource class will serve requests for.
@Path("UserInfoService")
public class UserInfo {

 // @GET here defines, this method will method will process HTTP GET
 // requests.
 @GET
 // @Path here defines method level path. Identifies the URI path that a
 // resource class method will serve requests for.
 @Path("/name/{i}")
 // @Produces here defines the media type(s) that the methods
 // of a resource class can produce.
 @Produces(MediaType.TEXT_XML)
 // @PathParam injects the value of URI parameter that defined in @Path
 // expression, into the method.
 public String userName(@PathParam("i") String i) {

  String name = i;
  return "<User>" + "<Name>" + name + "</Name>" + "</User>";
 }
 
 @GET 
 @Path("/age/{j}") 
 @Produces(MediaType.TEXT_XML)
 public String userAge(@PathParam("j") int j) {

  int age = j;
  return "<User>" + "<Age>" + age + "</Age>" + "</User>";
 }
}

访问地址

http://localhost:8080/RESTfulWS/rest/UserInfoService/name/Pavithra

返回结果为XML：

<User>
	<Name>Pavithra</Name>
</User>

客户端

逻辑代码

package com.eviac.blog.restclient;

import javax.ws.rs.core.MediaType;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;

/**
 * 
 * @author pavithra
 * 
 */
public class UserInfoClient {

 public static final String BASE_URI = "http://localhost:8080/RESTfulWS";
 public static final String PATH_NAME = "/UserInfoService/name/";
 public static final String PATH_AGE = "/UserInfoService/age/";

 public static void main(String[] args) {

  String name = "Pavithra";
  int age = 25;

  ClientConfig config = new DefaultClientConfig();
  Client client = Client.create(config);
  WebResource resource = client.resource(BASE_URI);

  WebResource nameResource = resource.path("rest").path(PATH_NAME + name);
  System.out.println("Client Response \n"
    + getClientResponse(nameResource));
  System.out.println("Response \n" + getResponse(nameResource) + "\n\n");

  WebResource ageResource = resource.path("rest").path(PATH_AGE + age);
  System.out.println("Client Response \n"
    + getClientResponse(ageResource));
  System.out.println("Response \n" + getResponse(ageResource));
 }

 /**
  * Returns client response.
  * e.g : 
  * GET http://localhost:8080/RESTfulWS/rest/UserInfoService/name/Pavithra 
  * returned a response status of 200 OK
  *
  * @param service
  * @return
  */
 private static String getClientResponse(WebResource resource) {
  return resource.accept(MediaType.TEXT_XML).get(ClientResponse.class)
    .toString();
 }

 /**
  * Returns the response as XML
  * e.g : <User><Name>Pavithra</Name></User> 
  * 
  * @param service
  * @return
  */
 private static String getResponse(WebResource resource) {
  return resource.accept(MediaType.TEXT_XML).get(String.class);
 }
}

运行

Client Response 
GET http://localhost:8080/RESTfulWS/rest/UserInfoService/name/Pavithra returned 
a response status of 200 OK
Response 
<User><Name>Pavithra</Name></User>


Client Response 
GET http://localhost:8080/RESTfulWS/rest/UserInfoService/age/25 returned a 
response status of 200 OK
Response 
<User><Age>25</Age></User>