Android HttpURLConnection 實現 GET/POST 請求完整示例

Android HttpURLConnection 實現 GET/POST 請求完整示例

本文專注於 HttpURLConnection 的數據傳輸核心邏輯，不包含 UI 操作及中文亂碼處理。實際開發中網絡請求需在子線程執行。

核心代碼實現

package com.example.httpurlconnectiontest;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import android.content.Context;
import android.widget.Toast;

public class HttpThread extends Thread {
    private String url;
    private String name;
    private String age;
    private Context context;

    public HttpThread(Context context, String url, String name, String age) {
        this.context = context;
        this.url = url;
        this.name = name;
        this.age = age;
    }

    private void doGet() {
        url = url + "?username=" + name + "&password=" + age;
        try {
            URL httpUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) httpUrl.openConnection();
            conn.setRequestMethod("GET");
            conn.setReadTimeout(5000);
            BufferedReader reader = new BufferedReader(
                new InputStreamReader(conn.getInputStream()));
            String str;
            StringBuffer sb = new StringBuffer();
            while ((str = reader.readLine()) != null) {
                sb.append(str);
            }
            System.out.println(sb);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void doPost() {
        try {
            URL httpUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) httpUrl.openConnection();
            conn.setRequestMethod("POST");
            conn.setReadTimeout(5000);
            OutputStream out = conn.getOutputStream();
            String content = "username=" + name + "&password=" + age;
            out.write(content.getBytes());
            BufferedReader reader = new BufferedReader(
                new InputStreamReader(conn.getInputStream()));
            String str;
            StringBuffer sb = new StringBuffer();
            while ((str = reader.readLine()) != null) {
                sb.append(str);
            }
            System.out.println(sb);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (ProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void run() {
        // doGet();
        doPost();
    }
}

MainActivity 中調用方式

String url = "https://115.158.57.173:8080/KuaiDi3/AddUser_servlet";
new HttpThread(MainActivity.this, url, "123", "123").start();

關鍵點總結：

• GET 請求：參數拼接在 URL 後，使用 conn.getInputStream() 讀取響應。
• POST 請求：通過 conn.getOutputStream() 寫入參數數據，同樣用 getInputStream() 讀取響應。
• 均設置了 5 秒讀取超時（setReadTimeout(5000)）。
• 實際項目中建議封裝為通用網絡工具類，並處理異常、編碼、線程池等。