由于在实际项目中碰到的restful服务，参数都以json为准。这里我获取的接口和传入的参数都是json字符串类型。发布restful服务可参照文章Jersey实现Restful服务(实例讲解)，以下接口调用基于此服务。

基于发布的Restful服务，下面总结几种常用的调用方法。

(1)Jersey API

package com.restful.client;import com.fasterxml.jackson.core.JsonProcessingException;import com.fasterxml.jackson.databind.ObjectMapper;import com.restful.entity.PersonEntity;import com.sun.jersey.api.client.Client;import com.sun.jersey.api.client.ClientResponse;import com.sun.jersey.api.client.WebResource;import javax.ws.rs.core.MediaType;/** * Created by XuHui on 2017/8/7. */public class JerseyClient { private static String REST_API = "http://localhost:8080/jerseyDemo/rest/JerseyService"; public static void main(String[] args) throws Exception { getRandomResource(); addResource(); getAllResource(); } public static void getRandomResource() { Client client = Client.create(); WebResource webResource = client.resource(REST_API + "/getRandomResource"); ClientResponse response = webResource.type(MediaType.APPLICATION_JSON).accept("application/json").get(ClientResponse.class); String str = response.getEntity(String.class); System.out.print("getRandomResource result is : " + str + "\n"); } public static void addResource() throws JsonProcessingException { Client client = Client.create(); WebResource webResource = client.resource(REST_API + "/addResource/person"); ObjectMapper mapper = new ObjectMapper(); PersonEntity entity = new PersonEntity("NO2", "Joker", "http://"); ClientResponse response = webResource.type(MediaType.APPLICATION_JSON).accept(MediaType.APPLICATION_JSON).post(ClientResponse.class, mapper.writeValueAsString(entity)); System.out.print("addResource result is : " + response.getEntity(String.class) + "\n"); } public static void getAllResource() { Client client = Client.create(); WebResource webResource = client.resource(REST_API + "/getAllResource"); ClientResponse response = webResource.type(MediaType.APPLICATION_JSON).accept("application/json").get(ClientResponse.class); String str = response.getEntity(String.class); System.out.print("getAllResource result is : " + str + "\n"); }}

结果：

getRandomResource result is : {"id":"NO1","name":"Joker","addr":"http:///"}addResource result is : {"id":"NO2","name":"Joker","addr":"http://"}getAllResource result is : [{"id":"NO2","name":"Joker","addr":"http://"}]

(2)HttpURLConnection

package com.restful.client;import com.fasterxml.jackson.databind.ObjectMapper;import com.restful.entity.PersonEntity;import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;/** * Created by XuHui on 2017/8/7. */public class HttpURLClient { private static String REST_API = "http://localhost:8080/jerseyDemo/rest/JerseyService"; public static void main(String[] args) throws Exception { addResource(); getAllResource(); } public static void addResource() throws Exception { ObjectMapper mapper = new ObjectMapper(); URL url = new URL(REST_API + "/addResource/person"); HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setDoOutput(true); httpURLConnection.setRequestMethod("POST"); httpURLConnection.setRequestProperty("Accept", "application/json"); httpURLConnection.setRequestProperty("Content-Type", "application/json"); PersonEntity entity = new PersonEntity("NO2", "Joker", "http://"); OutputStream outputStream = httpURLConnection.getOutputStream(); outputStream.write(mapper.writeValueAsBytes(entity)); outputStream.flush(); BufferedReader reader = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream())); String output; System.out.print("addResource result is : "); while ((output = reader.readLine()) != null) { System.out.print(output); } System.out.print("\n"); } public static void getAllResource() throws Exception { URL url = new URL(REST_API + "/getAllResource"); HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setRequestMethod("GET"); httpURLConnection.setRequestProperty("Accept", "application/json"); BufferedReader reader = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream())); String output; System.out.print("getAllResource result is :"); while ((output = reader.readLine()) != null) { System.out.print(output); } System.out.print("\n"); }}

结果：

addResource result is : {"id":"NO2","name":"Joker","addr":"http://"}getAllResource result is :[{"id":"NO2","name":"Joker","addr":"http://"}]

(3)HttpClient

package com.restful.client;import com.fasterxml.jackson.databind.ObjectMapper;import com.restful.entity.PersonEntity;import org.apache.http.HttpResponse;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.StringEntity;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;/** * Created by XuHui on 2017/8/7. */public class RestfulHttpClient { private static String REST_API = "http://localhost:8080/jerseyDemo/rest/JerseyService"; public static void main(String[] args) throws Exception { addResource(); getAllResource(); } public static void addResource() throws Exception { HttpClient httpClient = new DefaultHttpClient(); PersonEntity entity = new PersonEntity("NO2", "Joker", "http://"); ObjectMapper mapper = new ObjectMapper(); HttpPost request = new HttpPost(REST_API + "/addResource/person"); request.setHeader("Content-Type", "application/json"); request.setHeader("Accept", "application/json"); StringEntity requestJson = new StringEntity(mapper.writeValueAsString(entity), "utf-8"); requestJson.setContentType("application/json"); request.setEntity(requestJson); HttpResponse response = httpClient.execute(request); String json = EntityUtils.toString(response.getEntity()); System.out.print("addResource result is : " + json + "\n"); } public static void getAllResource() throws Exception { HttpClient httpClient = new DefaultHttpClient(); HttpGet request = new HttpGet(REST_API + "/getAllResource"); request.setHeader("Content-Type", "application/json"); request.setHeader("Accept", "application/json"); HttpResponse response = httpClient.execute(request); String json = EntityUtils.toString(response.getEntity()); System.out.print("getAllResource result is : " + json + "\n"); }}

结果：

addResource result is : {"id":"NO2","name":"Joker","addr":"http://"}getAllResource result is : [{"id":"NO2","name":"Joker","addr":"http://"}]

maven：

<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.1.2</version></dependency>

(4)JAX-RS API

package com.restful.client;import com.restful.entity.PersonEntity;import javax.ws.rs.client.Client;import javax.ws.rs.client.ClientBuilder;import javax.ws.rs.client.Entity;import javax.ws.rs.core.MediaType;import javax.ws.rs.core.Response;import java.io.IOException;/** * Created by XuHui on 2017/7/27. */public class RestfulClient { private static String REST_API = "http://localhost:8080/jerseyDemo/rest/JerseyService"; public static void main(String[] args) throws Exception { getRandomResource(); addResource(); getAllResource(); } public static void getRandomResource() throws IOException { Client client = ClientBuilder.newClient(); client.property("Content-Type","xml"); Response response = client.target(REST_API + "/getRandomResource").request().get(); String str = response.readEntity(String.class); System.out.print("getRandomResource result is : " + str + "\n"); } public static void addResource() { Client client = ClientBuilder.newClient(); PersonEntity entity = new PersonEntity("NO2", "Joker", "http://"); Response response = client.target(REST_API + "/addResource/person").request().buildPost(Entity.entity(entity, MediaType.APPLICATION_JSON)).invoke(); String str = response.readEntity(String.class); System.out.print("addResource result is : " + str + "\n"); } public static void getAllResource() throws IOException { Client client = ClientBuilder.newClient(); client.property("Content-Type","xml"); Response response = client.target(REST_API + "/getAllResource").request().get(); String str = response.readEntity(String.class); System.out.print("getAllResource result is : " + str + "\n"); }}

结果：

getRandomResource result is : {"id":"NO1","name":"Joker","addr":"http:///"}addResource result is : {"id":"NO2","name":"Joker","addr":"http://"}getAllResource result is : [{"id":"NO2","name":"Joker","addr":"http://"}]

(5)webClient

package com.restful.client;import com.fasterxml.jackson.databind.ObjectMapper;import com.restful.entity.PersonEntity;import org.apache.cxf.jaxrs.client.WebClient;import javax.ws.rs.core.Response;/** * Created by XuHui on 2017/8/7. */public class RestfulWebClient { private static String REST_API = "http://localhost:8080/jerseyDemo/rest/JerseyService"; public static void main(String[] args) throws Exception { addResource(); getAllResource(); } public static void addResource() throws Exception { ObjectMapper mapper = new ObjectMapper(); WebClient client = WebClient.create(REST_API) .header("Content-Type", "application/json") .header("Accept", "application/json") .encoding("UTF-8") .acceptEncoding("UTF-8"); PersonEntity entity = new PersonEntity("NO2", "Joker", "http://"); Response response = client.path("/addResource/person").post(mapper.writeValueAsString(entity), Response.class); String json = response.readEntity(String.class); System.out.print("addResource result is : " + json + "\n"); } public static void getAllResource() { WebClient client = WebClient.create(REST_API) .header("Content-Type", "application/json") .header("Accept", "application/json") .encoding("UTF-8") .acceptEncoding("UTF-8"); Response response = client.path("/getAllResource").get(); String json = response.readEntity(String.class); System.out.print("getAllResource result is : " + json + "\n"); }}

结果：

addResource result is : {"id":"NO2","name":"Joker","addr":"http://"}getAllResource result is : [{"id":"NO2","name":"Joker","addr":"http://"}

maven：

<dependency> <groupId>org.apache.cxf</groupId> <artifactId>cxf-bundle-jaxrs</artifactId> <version>2.7.0</version></dependency>

注：该jar包引入和jersey包引入有冲突，不能在一个工程中同时引用。

以上这篇基于Restful接口调用方法总结(超详细)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。