直接用 Java 自带的包搞定，无需其他第三方jar包

[Java]代码

public static String fetch_url(String url) throws IOException {        BufferedReader bis = null;        InputStream is = null;        try {            URLConnection connection = new URL(url).openConnection();            is = connection.getInputStream();            // warning of UTF-8 data            bis = new BufferedReader(new InputStreamReader(is, "UTF-8"));            String line = null;            StringBuffer result = new StringBuffer();            while ((line = bis.readLine()) != null) {                result.append(line);            }            return result.toString();        } finally {            if (bis != null) {                try {                    bis.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if (is != null) {                try {                    is.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }