Jersey实现Restful服务

Jersey是基于Java的一个轻量级RESTful风格的Web Services框架。以下我基于IDEA实现Restful完整Demo。

1.创建maven-web工程，后面就是正常的maven工程创建流程。

2.添加Jersey框架的maven文件。

  4.0.0
  com.restful
  jerseyDemo
  war
  1.0-SNAPSHOT
  jerseyDemo Maven Webapp
  http://maven.apache.org
  
    
      junit
      junit
      3.8.1
      test
    
    
      org.glassfish.jersey.containers
      jersey-container-servlet
      2.9
    
    
      org.glassfish.jersey.core
      jersey-client
      2.9
    
    
      org.glassfish.jersey.media
      jersey-media-json-jackson
      2.9
    
    
      com.sun.jersey
      jersey-client
      1.19.3
    
  
  
    jerseyDemo
  

3.Restful接口定义。

package com.restful.service;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.restful.entity.PersonEntity;

import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by XuHui on 2017/8/2.
 */
@Path("/JerseyService")
public class JerseyService {
    private static Map map = new HashMap();

    @GET
    @Path("/getAllResource")
    @Produces(MediaType.APPLICATION_JSON)
    public String getAllResource() throws JsonProcessingException {
        List list = new ArrayList();
        for (PersonEntity entity : map.values()) {
            list.add(entity);
        }

        ObjectMapper mapper = new ObjectMapper();
        return mapper.writeValueAsString(list);
    }

    @GET
    @Path("/getResourceById/{id}")
    @Produces(MediaType.APPLICATION_JSON)
    public String getResource(@PathParam("id") String id) throws JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();
        return mapper.writeValueAsString(map.get(id));
    }

    @POST
    @Path("/addResource/{person}")
    @Consumes({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
    @Produces(MediaType.APPLICATION_JSON)
    public String addResource(String person) throws IOException {
        ObjectMapper mapper = new ObjectMapper();
        PersonEntity entity = mapper.readValue(person, PersonEntity.class);
        map.put(entity.getId(), entity);
        return mapper.writeValueAsString(entity);
    }

    @GET
    @Path("/getRandomResource")
    @Produces(MediaType.APPLICATION_JSON)
    public String getRandomResource() throws JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();
        PersonEntity entity = new PersonEntity("NO1", "Joker", "http:///");
        return mapper.writeValueAsString(entity);
    }
}

PersonEntity实体类实现。

package com.restful.entity;

/**
 * Created by XuHui on 2017/8/2.
 */
public class PersonEntity {
    private String id;
    private String name;
    private String addr;

    public PersonEntity() {
    }

    public PersonEntity(String id, String name, String addr) {
        this.id = id;
        this.name = name;
        this.addr = addr;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAddr() {
        return addr;
    }

    public void setAddr(String addr) {
        this.addr = addr;
    }

    @Override
    public String toString() {
        return "PersonEntity{" +
                "id='" + id + ''' +
                ", name='" + name + ''' +
                ", addr='" + addr + ''' +
                '}';
    }
}

4.web.xml配置。

  Archetype Created Web Application
  
    Jersey RESTful Application
    org.glassfish.jersey.servlet.ServletContainer
    
      jersey.config.server.provider.packages
      com.restful
    
  
  
  Jersey RESTful Application
  /rest/*
  

5.搭建本地tomcat

6.运行结果.http://localhost:8080/jerseyDemo/rest/application.wadl是所有对外接口的调用方法。使用postman来看看这个接口是怎么调用的吧。

POST请求

GET请求

：http://www.linuxidc.com/Linux/2017-08/146045.htm