URLConnection 判断连接是否正常

最新推荐文章于 2025-06-27 13:09:01 发布

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import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

public class HttpURLConnectionTest {

    public static void testConnect(String surl) throws IOException {

        URL url = new URL(surl);

        String userInfo = url.getUserInfo();

        if (userInfo != null && userInfo.length() > 0) {

            String string = surl.replace(userInfo, "");

            url = new URL(string);

        }

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();

        if (userInfo != null && userInfo.length() > 0)

            connection.setRequestProperty("Authorization", userInfo);       

        connection.connect();           

        System.out.println(connection.getResponseCode());//如果hhtp服务器不需要验证，输出200

    }

    public static void testConnect2(String surl) throws IOException {

        URL url = new URL(surl);

        String userInfo = url.getUserInfo();

        if (userInfo != null && userInfo.length() > 0) {

            String string = surl.replace(userInfo, "");

            url = new URL(string);

        }

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();

        connection.setDoOutput(true);

        StringBuffer sb = new StringBuffer();

        sb.append("userName=" + "aaa");

        sb.append("&password=" + "bbb");

        //post信息

        OutputStream os = connection.getOutputStream();

        os.write(sb.toString().getBytes("GBK"));

        os.close();

        connection.connect();       

        System.out.println(connection.getResponseCode());//如果hhtp服务器需要验证时，输出401

    }

    public static void main(String args[]) throws IOException {

        String url = "http://192.9.168.11:1122/";

        testConnect(url);

        //testConnect2(url);

    }

}