Java进阶(三十一) Web服务调用

Java进阶(三十一) Web服务调用

前言

有朋友问了一个问题:如何调用已知的音乐服务接口，服务文档如下:

https://www.evernote.com/shard/s744/sh/c37cd503-68fc-4406-b8f2-5e90095be303/19b67e36aa2ccd19

查看代码之后，按照以往的服务调用方法实现，结果无法实现。很是费解，求教大师兄之后，问题，迎刃而解，只能说自己需要学习的地方还有很多。

完整代码如下：

package plan.http.util;

import java.io.IOException;

import java.io.UnsupportedEncodingException;

import java.util.ArrayList;

import java.util.List;

import org.apache.http.HttpEntity;

import org.apache.http.NameValuePair;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.CloseableHttpResponse;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;

public class HttpClientUtil {

public static void main(String[] args) throws Exception {

HttpClientUtil.getByHttpPost();

}

public static String getByHttpPost() throws Exception {

// 1.创建HttpClient对象。(创建默认的httpClient实例.)

CloseableHttpClient httpclient = HttpClients.createDefault();

// 首页

String indexStr = "http://music-download.dev.fotoable.net/musics/lists";

// 搜索

String searchStr = "http://music-download.dev.fotoable.net/public/search";

// 2.创建请求方法的实例，并指定请求URL。如果需要发送GET请求，创建HttpGet对象；如果需要发送POST请求，创建HttpPost对象。(创建httppost)

HttpPost httppost = new HttpPost(searchStr);

List formparams = new ArrayList();

// 3.如果需要发送请求参数，可调用HttpGet、HttpPost共同的setParams(HetpParams params)方法来添加请求参数；

// 对于HttpPost对象而言，也可调用setEntity(HttpEntity entity)方法来设置请求参数。

// 关键词搜索传参(创建参数队列)

formparams.add(new BasicNameValuePair("keyword", "See you again"));

// formparams.add(new BasicNameValuePair("pwd", "123"));

UrlEncodedFormEntity uefEntity;

try {

uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8");

httppost.setHeader("User-Agent","Mozilla/5.0 (Windows NT 10.0; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0");

httppost.setHeader("Connection", "keep-alive");

httppost.setHeader("Accept-Language","zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3");

httppost.setHeader("Accept-Encoding", "gzip, deflate");

httppost.setHeader("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");

httppost.setHeader("JSESSIONID","536020F424630F22DB1F4EAEAD8E83BD");

httppost.setEntity(uefEntity);

System.out.println("executing request " + httppost.getURI());

// 4.调用HttpClient对象的execute(HttpUriRequest request)发送请求，该方法返回一个HttpResponse。

CloseableHttpResponse response = httpclient.execute(httppost);

try {

HttpEntity entity = response.getEntity();

if (entity != null) {

System.out.println("--------------------------------------");

System.out.println("Response content: " + EntityUtils.toString(entity, "UTF-8"));

System.out.println("--------------------------------------");

}

} finally {

response.close();

}

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (UnsupportedEncodingException e1) {

e1.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

// 5. 释放连接。无论执行方法是否成功，都必须释放连接

httpclient.close();

} catch (IOException e) {

e.printStackTrace();

}

}

return null;

}

}

参考文献

http://blog.csdn.net/wangpeng047/article/details/19624529

感触

自己还是应该多多学习才是，遇到了问题不要紧，要懂得回过头来认真总结，学习。这样才能不断进步。

美文美图

Java web前端

版权声明：本文内容由网络用户投稿，版权归原作者所有，本站不拥有其著作权，亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容，请联系我们jiasou666@gmail.com 处理，核实后本网站将在24小时内删除侵权内容。