Jersey实现Restful服务(实例讲解)

2019-11-26 11:42:08

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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