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。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>

  <groupId>com.restful</groupId>

  <artifactId>jerseyDemo</artifactId>

  <packaging>war</packaging>

  <version>1.0-SNAPSHOT</version>

  <name>jerseyDemo Maven Webapp</name>

  <url>http://maven.apache.org</url>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

    <dependency>

      <groupId>org.glassfish.jersey.containers</groupId>

      <artifactId>jersey-container-servlet</artifactId>

      <version>2.9</version>

    </dependency>

    <dependency>

      <groupId>org.glassfish.jersey.core</groupId>

      <artifactId>jersey-client</artifactId>

      <version>2.9</version>

    </dependency>

    <dependency>

      <groupId>org.glassfish.jersey.media</groupId>

      <artifactId>jersey-media-json-jackson</artifactId>

      <version>2.9</version>

    </dependency>

    <dependency>

      <groupId>com.sun.jersey</groupId>

      <artifactId>jersey-client</artifactId>

      <version>1.19.3</version>

    </dependency>

  </dependencies>

  <build>

    <finalName>jerseyDemo</finalName>

  </build>

</project>

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<String, PersonEntity> map = new HashMap<String, PersonEntity>();

    @GET

    @Path("/getAllResource")

    @Produces(MediaType.APPLICATION_JSON)

    public String getAllResource() throws JsonProcessingException {

        List<PersonEntity> list = new ArrayList<PersonEntity>();

        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。

<!DOCTYPE web-app PUBLIC

 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>

  <display-name>Archetype Created Web Application</display-name>

  <servlet>

    <servlet-name>Jersey RESTful Application</servlet-name>

    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>

    <init-param>

      <param-name>jersey.config.server.provider.packages</param-name>

      <param-value>com.restful</param-value>

    </init-param>

  </servlet>

  <servlet-mapping>

  <servlet-name>Jersey RESTful Application</servlet-name>

  <url-pattern>/rest/*</url-pattern>

  </servlet-mapping>

</web-app>

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

巴特西

Jersey实现Restful服务

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