Android Get Post 請求

線程加載獲得json對象

//線程中或intentService加載執行請求


package com.example.administrator.mylogin;
import android.app.IntentService;
import android.content.Intent;
import android.content.Context;
import android.util.Log;
import android.widget.Toast;
import com.example.administrator.mylogin.Dao.dao;
import com.example.administrator.mylogin.Dao.imol.LoginImpl;
import java.util.HashMap;
import java.util.Map;
public class MyIntentService extends IntentService {

    final String KEY="http://api.dongman.fm/account/loginByAccountAndPwd";
    public MyIntentService() {
        super("MyIntentService");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        dao dao= new LoginImpl();
        String user=intent.getStringExtra("username");　　//獲得參數
        String pswd=intent.getStringExtra("password");　　//獲得參數

        Map map= new HashMap<String,String>();　　//設置map
        map.put("account",user);　　　　　　　　　　//傳入參數
        map.put("password",pswd);
        String json=dao.postDownloadJson(KEY,map);　　//填寫URL 和請求參數

        Log.i("Json",json);
    }

}

 

發送Post請求實現方法

package com.example.administrator.mylogin.Dao.imol;

import android.util.Log;

import com.example.administrator.mylogin.Dao.dao;
import com.example.administrator.mylogin.model.user;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by Administrator on 2017/12/5.
 */


/**
 * 獲取登錄的json
 */
public class LoginImpl implements dao {
    @Override
    public String postDownloadJson(String path, Map<String, String> keyAndValues) {
        URL url = null; //url
        HttpURLConnection conn=null;
        ByteArrayOutputStream baos = null;
        try {
            url = new URL(path);                          //對象創建
             conn= (HttpURLConnection) url.openConnection(); //創建鏈接對象，強轉對象打開鏈接
            conn.setRequestMethod("POST");              //設置請求類型（大寫）
            // conn.setConnectTimeout(10000);           //連接超時 單位毫秒
            // conn.setReadTimeout(2000);               //讀取超時 單位毫秒

            conn.setUseCaches(false);
            // 發送POST請求必須設置如下兩行
            conn.setDoInput(true);
            conn.setDoOutput(true);
            //application/x-javascript text/xml->xml數據 application/x-javascript->json對象 application/x-www-form-urlencoded->表單數據
            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            conn.connect(); //打開連接
            //獲取url對應的輸出流
            PrintWriter print = new PrintWriter(conn.getOutputStream());//設置輸出流
            StringBuilder builder = new StringBuilder();                        //用map設置key值
            for (Map.Entry<String, String> entry : keyAndValues.entrySet()) {
                builder.append(entry.getKey());
                builder.append("=");
                builder.append(entry.getValue());
                builder.append("&");
            }
            builder.substring(0, builder.length() - 1); //不顯示最后一個&
            String parameters = URLEncoder.encode(builder.toString(), "UTF-8");

            print.write(parameters);            //設置key 發出請求
            // flush輸出流的緩沖
            print.flush();

            //開始獲得數據
            InputStream bis = conn.getInputStream(); //獲得輸出流
            baos = new ByteArrayOutputStream();
            int len;

            byte[] b = new byte[2048];
            while ((len = bis.read(b)) != -1) {
                baos.write(b, 0, len);
            }
            baos.flush();
            return new String(baos.toByteArray()); //返回字符串

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (baos != null) baos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                if(conn!=null){
                    conn.disconnect(); //關閉連接
                }
            }
        }
        return null;
    }

    @Override
    public user postUserLoginInfo(String json) {
        JSONObject jsonObg;
        user user = new user();
        try {
            jsonObg = new JSONObject(json);
            jsonObg.getString("message");
            JSONObject jsonDate = jsonObg.getJSONObject("data");
            user.setAvatar_url(jsonDate.getString("avatar_url"));
            user.setName(jsonDate.getString("name"));
            user.setToken(jsonDate.getString("refresh_token"));
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return user;
    }

    public void aaa() {
        Map kvMap = new HashMap<String, String>();
        kvMap.put("username", "aaa");
        kvMap.put("password", "123");
        postDownloadJson("http://baidu.com", kvMap);
    }

    public  void readContentFromPost() throws IOException {
        // Post請求的url，與get不同的是不需要帶參數
        URL postUrl = new URL("http://api.dongman.fm/account/loginByAccountAndPwd");
        // 打開連接
        HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();

        // 設置是否向connection輸出，因為這個是post請求，參數要放在
        // http正文內，因此需要設為true
        connection.setDoOutput(true);
        // Read from the connection. Default is true.
        connection.setDoInput(true);
        // 默認是 GET方式
        connection.setRequestMethod("POST");

        // Post 請求不能使用緩存
        connection.setUseCaches(false);

        connection.setInstanceFollowRedirects(true);

        // 配置本次連接的Content-type，配置為application/x-www-form-urlencoded的
        // 意思是正文是urlencoded編碼過的form參數，下面我們可以看到我們對正文內容使用URLEncoder.encode
        // 進行編碼
        connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
        // 連接，從postUrl.openConnection()至此的配置必須要在connect之前完成，
        // 要注意的是connection.getOutputStream會隱含的進行connect。
        connection.connect();
        DataOutputStream out = new DataOutputStream(connection
                .getOutputStream());
        // The URL-encoded contend
        // 正文，正文內容其實跟get的URL中 '? '后的參數字符串一致
        String content = "account=" + URLEncoder.encode("[e-mail]", "UTF-8");
        content +="&password="+URLEncoder.encode("1", "UTF-8");;
        // DataOutputStream.writeBytes將字符串中的16位的unicode字符以8位的字符形式寫到流里面
        out.writeBytes(content);

        out.flush();
        out.close();

        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String line;

        while ((line = reader.readLine()) != null){
            Log.i("Log-----------",line);
        }

        reader.close();
        connection.disconnect();
    }

}