Restful实战(基于Jersey)

来源：互联网发布：cs1.6 for mac 编辑：程序博客网时间：2024/06/05 08:26

基于网上的例子进行了Jersey的实战

1.在eclipse中新建动态web工程JerseyWS

2.拷贝jar包到lib目录

asm-3.3.1.jar

jackson-core-asl-1.9.2.jar

jackson-jaxrs-1.9.2.jar

jackson-mapper-asl-1.9.2.jar

jackson-xc-1.9.2.jar

jersey-bundle-1.18.jar

jersey-client-1.17.1.jar

jersey-core-1.17.1.jar

jersey-json-1.18.jar

jersey-server-1.17.1.jar

jersey-servlet-1.17.1.jar

jsr311-api-1.1.1.jar

工程截图

3.src下创建com.eviac.blog.restws包，创建类Track.java和TrackService.java

==========

Track.java

==========

package com.eviac.blog.restws;

public class Track {
   Integer id;
   String title;
   String singer;

   public Integer getId() {
       return id;
   }
   public void setId(Integer id) {
       this.id = id;
   }
   public String getTitle() {
       return title;
   }
   public void setTitle(String title) {
       this.title = title;
   }
   public String getSinger() {
       return singer;
   }
   public void setSinger(String singer) {
       this.singer = singer;
   }
   @Override
   public String toString(){
       return "Track [title="+title+", singer="+singer+"]";
   }
}

==========

TrackService.java

==========

package com.eviac.blog.restws;

import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

@Path("/trackService")
public class TrackService {
   static Track track = null;
   @GET
   @Path("/get")
   @Produces(MediaType.APPLICATION_JSON)
   public Track getTrackInJSON(){
        if(null == this.track){
           Track track = new Track();
           track.setTitle("Enter Sandman");
           track.setSinger("Metallica");
           return track;
       }
       return this.track;
   }

   @POST
   @Path("/post")
   public Response createTrackInJSON(Track track){
       this.track = track;
       String result = "Track saved : " + track;
       return Response.status(201)
                                   .entity(result)
                                   .type(MediaType.TEXT_PLAIN)
                                   .build();
   }

   @PUT
   @Path("/put/{id}")
   public Response updateTrackInfoInJSON(@PathParam("id") Integer id, Track track){
       int response_code = 204;
       String result = "Track updated : " + track;
       if(null == this.track || this.track.getId() != id){
           response_code = 201;
           result = "Track saved : " + track;
       }

       this.track = track;
       return Response.status(response_code)
                                   .entity("response_code "+response_code+", "+result)
                                   .type(MediaType.TEXT_PLAIN)
                                   .build();
//       return Response.ok().entity("response_code "+response_code+", "+result).type(MediaType.TEXT_PLAIN).build();
   }
}

4.配置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" 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>JerseyWS</display-name>
<welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
</welcome-file-list>

<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>
    
    <init-param>
        <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
        <param-value>true</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>

5.启动tomcat，在浏览器中输入http://localhost/JerseyWS/rest/trackService/get/，出现如下界面则服务端启动成功

5.创建普通java工程JerseyWSClient

6.新建lib目录,拷贝jar包到lib目录

jersey-bundle-1.18.jar

jersey-client-1.17.1.jar

jersey-core-1.17.1.jar

7.在src下新建com.track.client包，新建类TrackClient.java

===========

TrackClient.java

=============

package com.track.client;

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;
import com.sun.jersey.api.json.JSONConfiguration;

public class TrackClient {

   public static void main(String[] args) {
       ClientConfig clientConfig = new DefaultClientConfig();
       clientConfig.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING, Boolean.TRUE );
       Client client = Client.create(clientConfig);

       String input = "{\"id\":1,\"singer\":\"Metallica\",\"title\":\"Fade To Black\"}";
       WebResource r = client.resource("http://localhost/JerseyWS/rest/trackService/post/");
       input = postTrack2Remoute(r, input);

       getRemouteTrack(client);


       input = "{\"id\":2,\"singer\":\"Metallica\",\"title\":\"Enter Sandman\"}";
       postTrack2Remoute2(input, r);

       getRemouteTrack(client);

       input = "{\"id\":3,\"singer\":\"Metallica\",\"title\":\"Creeping Death\"}";
       postTrack2Remoute3(input, r);

       getRemouteTrack2(client);

       input = "{\"id\":2,\"singer\":\"Metallica\",\"title\":\"Creeping Death333\"}";
       r = client.resource("http://localhost/JerseyWS/rest/trackService/put/2");
       putTrack2Remoute(input, r);

       getRemouteTrack2(client);
   }

   /**
   * post提交3
   * @param input
   * @param r
   */
   private static void postTrack2Remoute3(String input, WebResource r) {
       String response3 = r.accept(MediaType.APPLICATION_JSON, MediaType.TEXT_XML)
                                          .entity(input, MediaType.APPLICATION_JSON)
                                          .post(String.class);
       System.out.println(response3);
   }
   /**
   * 用于更新
   * @param input
   * @param r
   */
   private static void putTrack2Remoute(String input, WebResource r) {
       String response3 = r.accept(MediaType.APPLICATION_JSON, MediaType.TEXT_XML)
                                          .entity(input, MediaType.APPLICATION_JSON)
                                          .put(String.class);
       System.out.println(response3);
   }

   /**
   * post提交2
   * @param input
   * @param r
   */
   private static void postTrack2Remoute2(String input, WebResource r) {
       String response2 = r.accept(MediaType.APPLICATION_JSON, MediaType.TEXT_XML)
                                          .type(MediaType.APPLICATION_JSON)
                                          .post(String.class, input);
       System.out.println(response2);
   }
   /**
   * post提交1
   * @param r
   * @param input
   * @return
   */
   private static String postTrack2Remoute(WebResource r, String input) {

       ClientResponse response = r.type(MediaType.APPLICATION_JSON)
                                                        .post(ClientResponse.class, input);
       if(201 != response.getStatus()){
           throw new RuntimeException("Failed : HTTP error code : "+response.getStatus());
       }
       System.out.println("\nOutput from Server ..................\n");
       String output = response.getEntity(String.class) ;
       System.out.println(output);
       return input;
   }

   /**
   * get请求
   * @param client
   */
   private static void getRemouteTrack(Client client) {
       //获取请求响应状态消息
       WebResource resource = client.resource("http://localhost/JerseyWS/rest/trackService/get/");
       String returnMsg = resource.accept(MediaType.APPLICATION_JSON, MediaType.TEXT_XML)
                                                       .get(ClientResponse.class)
                                                       .toString();
       System.out.println(returnMsg);

       //获取调用方法的返回结果
       String returnMsg2 = resource.accept(MediaType.APPLICATION_JSON, MediaType.TEXT_XML)
                                                       .get(String.class);
       System.out.println(returnMsg2);
       System.out.println("\n");
   }

   private static void getRemouteTrack2(Client client){
       WebResource resource = client.resource("http://localhost/JerseyWS/rest/trackService/get/");
       ClientResponse clientResponse = resource.accept(MediaType.APPLICATION_JSON, MediaType.TEXT_XML)
           .get(ClientResponse.class);
       System.out.println("response status : " + clientResponse.getStatus());
       System.out.println("response result : " + clientResponse.getEntity(String.class));
       System.out.println("\n");
   }

}

8运行TrackClient.java的main方法，输出如下结果

Output from Server ..................

Track saved : Track [title=Fade To Black, singer=Metallica]
GET http://localhost/JerseyWS/rest/trackService/get/ returned a response status of 200 OK
{"id":1,"title":"Fade To Black","singer":"Metallica"}

Track saved : Track [title=Enter Sandman, singer=Metallica]
GET http://localhost/JerseyWS/rest/trackService/get/ returned a response status of 200 OK
{"id":2,"title":"Enter Sandman","singer":"Metallica"}

Track saved : Track [title=Creeping Death, singer=Metallica]
response status : 200
response result : {"id":3,"title":"Creeping Death","singer":"Metallica"}

response_code 201, Track saved : Track [title=Creeping Death333, singer=Metallica]
response status : 200
response result : {"id":2,"title":"Creeping Death333","singer":"Metallica"}

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