java httpclient 發起post請求 并且添加 fiddler代理抓包，處理字元集

此部落格為：fiddler 抓包  java  httpclient 發起post請求

從其他部落格看到的方法：

1. jvm 設定啟動代理參數

-DproxySet=true
 
-DproxyHost=127.0.0.1
 
-DproxyPort=8888      

失敗！

2.代碼中設定代理

System.setProperty("http.proxySet", "true");

System.setProperty("http.proxyHost", "127.0.0.1");

System.setProperty("http.proxyPort", "8888");

失敗！

解決問題:

             1. 發起的 請求體 用 StringEntity 類建立，并且加入utf-8字元集，否則中文在抓包資料中亂碼

                     String body = "{\"config\":{\"wo張三\":\"123\",\"mac\":\"FC:2F:EF:72:5F:43\"}}";

StringEntity entity = new StringEntity(body,"utf-8");
      

             2. fiddler 抓包java發起的請求。需要先開啟fiddler，設定代理端口為 8888，或者其他

              代理設定的正确姿勢：

             3.代碼中添加代理 使用HttpHost建立代理，

HttpHost proxy = new HttpHost("127.0.0.1",8888)                               
           response =  client.execute(proxy,httpPost);      

                     這個問題花了1天時間，以此紀念

import org.apache.http.client.methods.CloseableHttpResponse;
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.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.StatusLine;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;



public class test{

    public void testpost() throws IOException{
        
        //普通的client 設定方法
        CloseableHttpClient client = HttpClients.createDefault();

        String entityStr = null;

        CloseableHttpResponse response = null;

        String url = "http://192.168.10.16/api/ilink/device/gwpolicy_authpolicy_add?;

        //傳送json類型的字元串的請求體
        String body = "{\"config\":{\"wo張三\":\"123\",\"mac\":\"FC:2F:EF:72:5F:43\"}}";

        //建構請求實體,utf-8字元集
        StringEntity entity = new StringEntity(body,"utf-8");

        HttpPost httpPost = new HttpPost(url) ;


        //添加請求頭
        httpPost.addHeader("User-Agent","Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36");
        httpPost.addHeader("Content-Type","application/json;charset=UTF-8");


        //添加實體到post請求中
        httpPost.setEntity(entity);

        //fiddler 抓包 開啟的代理，若不需要，則注釋，client.execute（）的參數就不傳入此代理
        HttpHost proxy = new HttpHost("127.0.0.1",8888);

        //發起請求
        response =  client.execute(proxy,httpPost);


        //擷取響應狀态碼
        StatusLine statusLine = response.getStatusLine();
        int statu = statusLine.getStatusCode();
        System.out.println(statu);

        //擷取響應實體
        HttpEntity rentity = response.getEntity();


        //響應實體解碼
        entityStr = EntityUtils.toString(rentity, "UTF-8");
        System.out.println(entityStr);

    }


}