Question

我想用java获取url的文本。

 public static String getResponseFromUrlDesktop(String url) {
    try {
        URL website = new URL(url);
        URLConnection connection = website.openConnection();


        BufferedReader in = new BufferedReader(
                new InputStreamReader(
                        connection.getInputStream()));

        StringBuilder response = new StringBuilder();
        String inputLine;

        while ((inputLine = in.readLine()) != null)
            response.append(inputLine);

        in.close();

        return response.toString();
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

问题是，当我转到一个URL并且它给了我 java.io.IOException：服务器返回HTTP响应代码：URL为

如果我打开broswer中的网址，我会收到一条文字。无论响应代码如何，我如何始终获取GET请求的文本？

Answer 1

试试这个：

 public static String getResponseFromUrlDesktop(String url) {

        HttpURLConnection connection = null;
        StringBuilder response = new StringBuilder();
        BufferedReader in = null;
        try {
            URL website = new URL(url);
            connection = (HttpURLConnection) website.openConnection();

            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String inputLine;

            while ((inputLine = in.readLine()) != null)
                response.append(inputLine);

            in.close();
        } catch (IOException e) {
            try {
                if (connection.getResponseCode() >= 400) {
                    in = new BufferedReader(new InputStreamReader(
                            connection.getErrorStream()));
        //                             ^^^^^^^^^^^^^^
                    String inputLine;

                    while ((inputLine = in.readLine()) != null)
                        response.append(inputLine);

                }
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }

        return response.toString();

}

Answer 2

使用BufferedReader阅读并StringBuilder构建必需的字符串..

protected String Method_Name(String... url){
String urls = url[0];    
String texts = "";      
 try{
     in = new java.net.URL(urls).openStream();    
     BufferedReader reader = new BufferedReader(new InputStreamReader(in, "iso-8859-1"), 8);
     StringBuilder sb = new StringBuilder();
     String line = null;             
     while ((line = reader.readLine()) != null) {
         sb.append(line + "\n");
     }
     texts = sb.toString();    
 }catch (IOException e) {
     e.printStackTrace();
 }
 return texts;
}

Java - 具有任何响应代码的Url to String

2 个答案: