HttpURLConnection（GET）

最新推荐文章于 2025-06-11 13:06:20 发布

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本文介绍了一个简单的Java类，用于发送HTTP GET请求并解析返回的JSON数据。该类包括发送请求的方法及回调监听器接口，能够处理响应结果或错误情况，并提供JSON字符串解析功能。

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

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpUtils {


    public static void SendHttpRequest(final String address, final HttpCallbackListener listener){
        new Thread(new Runnable() {
            @Override
            public void run() {
                HttpURLConnection connection = null;
                try{
                    URL url =  new URL(address);
                    connection = (HttpURLConnection)url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setConnectTimeout(8000);
                    connection.setReadTimeout(8000);

                    connection.setDoInput(true);
                    connection.setDoOutput(true);
                    if (connection.getResponseCode() == 200) {// 判断请求码是否200，否则为失败
                        InputStream in = connection.getInputStream();
                        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
                        StringBuilder response = new StringBuilder();
                        String line;
                        while ((line = reader.readLine()) != null){
                            response.append(line);
                        }
                        if (listener != null){
                            listener.onFinish(response.toString());
                        }
                    }else{
                        if (listener != null){
                            listener.onFinish("{\"code\":-1000}");
                        }
                    }

                }catch (Exception e){
                    if (listener != null){
                        listener.onError(e);
                    }
                }finally {
                    if (connection != null){
                        connection.disconnect();
                    }
                }
            }
        }).start();
    }

    public static JSONObject parseJson (String jsonString) throws JSONException {

        return  new JSONObject(jsonString);
    }

}

public interface HttpCallbackListener {
    void onFinish(String response);

    void onError(Exception e);
}