基于Restful接口调用方法总结(超详细)

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。

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