版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/shuimofengyang/article/details/84137338
背景：取另外分公司的数据！以前是有那边的同事每天发数据包过来。现在是提供接口，获取众多类型的下载地址，自己去下。我来接手做这个事。语言java ，参数json格式 ，返回也是json格式。解析取到url生成txt文件。
1.依赖：
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.6</version>
</dependency>
2.
package getUrl;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class RestUtil {
/**
*
* @param url 请求地址
* @param body 请求参数
* @return 生成下载链接文件
* description：根据请求返回结果解析下载链接，生成链接文件。
* @throws Exception
*/
public static String sendHttpPost(String url, String body) throws Exception {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
Date d=new Date();
String today = sdf.format(new Date(d.getTime() - (long)24 * 60 * 60 * 1000 * 3));
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(url);
httpPost.addHeader("Content-Type", "application/json");
httpPost.setEntity(new StringEntity(body));
CloseableHttpResponse response = httpClient.execute(httpPost);
System.out.println(response.getStatusLine().getStatusCode() + "\n");
HttpEntity entity = response.getEntity();
String responseContent = EntityUtils.toString(entity, "UTF-8");
JsonParser parse = new JsonParser();
JsonObject json = (JsonObject) parse.parse(responseContent);
Iterator<JsonElement> iterator = json.get("data").getAsJsonObject().get("result").getAsJsonArray().iterator();
JsonObject parm = (JsonObject)parse.parse(body);
String typeId=parm.get("params").getAsJsonObject().get("typeId").toString().substring(1,6);
FileOutputStream stream = new FileOutputStream(typeId +"_" + today + ".txt");
while (iterator.hasNext()) {
String item = iterator.next().toString();
JsonObject subjson = (JsonObject) parse.parse(item);
String urls_one = subjson.get("downloadUrl").getAsString() + "\r\n";
byte[] bytes = urls_one.getBytes();
stream.write(bytes);
stream.flush();
}
stream.close();
response.close();
httpClient.close();
return responseContent;
}
public String sendParams(String type){
JSONObject jsonObj = new JSONObject();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
Date d=new Date();
String today = sdf.format(new Date(d.getTime() - (long)24 * 60 * 60 * 1000 * 3));
Map<String,String> params= new HashMap();
params.put("date","20181112");
//params.put("date",today);
params.put("typeId",type);
jsonObj.put("params",params);
jsonObj.put("key","/3MUlS7058C0ow7avJTb");
jsonObj.put("id","5be566660e5b084842ca732c");
jsonObj.put("pageNum",0);
jsonObj.put("pageSize",25);
return jsonObj.toString();
}
public static void main(String []args) {
try {
RestUtil restUtil = new RestUtil();
String url ="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
String[] arr={"layout","video","click","ffalcon_appstore"};
for (int i = 0; i <arr.length ; i++) {
String parm=restUtil.sendParams(arr[i]);
String resultString = restUtil.sendHttpPost(url, parm);
System.out.println("参数："+parm);
System.out.println("返回结果："+resultString);
}
} catch (Exception e) {
// TODO: handle exception
System.out.print(e.getMessage());
}
}
}
结果：
