Java進階(三十一) Web服務調用

Java進階(三十一) Web服務調用

前言

有朋友問了一個問題:如何調用已知的音樂服務接口，服務文檔如下:

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

查看代碼之后，按照以往的服務調用方法實現，結果無法實現。很是費解，求教大師兄之后，問題，迎刃而解，只能說自己需要學習的地方還有很多。

完整代碼如下：

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.創建HttpClient對象。(創建默認的httpClient實例.)

CloseableHttpClient httpclient = HttpClients.createDefault();

// 首頁

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

// 搜索

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

// 2.創建請求方法的實例，并指定請求URL。如果需要發送GET請求，創建HttpGet對象；如果需要發送POST請求，創建HttpPost對象。(創建httppost)

HttpPost httppost = new HttpPost(searchStr);

List formparams = new ArrayList();

// 3.如果需要發送請求參數，可調用HttpGet、HttpPost共同的setParams(HetpParams params)方法來添加請求參數；

// 對于HttpPost對象而言，也可調用setEntity(HttpEntity entity)方法來設置請求參數。

// 關鍵詞搜索傳參(創建參數隊列)

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.調用HttpClient對象的execute(HttpUriRequest request)發送請求，該方法返回一個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. 釋放連接。無論執行方法是否成功，都必須釋放連接

httpclient.close();

} catch (IOException e) {

e.printStackTrace();

}

}

return null;

}

}

參考文獻

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

感觸

自己還是應該多多學習才是，遇到了問題不要緊，要懂得回過頭來認真總結，學習。這樣才能不斷進步。

美文美圖

Java web前端

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