Java URLConnection實現HTTP的GET/POST

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public static String doGet(String url, String param) {        String result = "";        BufferedReader in = null;        try {            String urlNameString = url + "?" + param;            URL realUrl = new URL(urlNameString);            URLConnection connection = realUrl.openConnection();            connection.setRequestProperty("accept", "*/*");            connection.setRequestProperty("connection", "Keep-Alive");            connection.setRequestProperty("user-agent",                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");            connection.connect();            in = new BufferedReader(new InputStreamReader(connection.getInputStream()));            String line;            while ((line = in.readLine()) != null) {                result += line;            }        } catch (Exception e) {            try {in.close();} catch (Exception ex) {}        return null;        }        try {in.close();} catch (Exception e) {}        return result;    }public static String doPost(String url, String param) {        PrintWriter out = null;        BufferedReader in = null;        String result = "";        try {            URL realUrl = new URL(url);            URLConnection conn = realUrl.openConnection();            conn.setRequestProperty("accept", "*/*");            conn.setRequestProperty("connection", "Keep-Alive");            conn.setRequestProperty("user-agent",                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");            conn.setDoOutput(true);            conn.setDoInput(true);            out = new PrintWriter(conn.getOutputStream());            out.print(param);            out.flush();            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));            String line;            while ((line = in.readLine()) != null) {                result += line;            }        } catch (Exception e) {            try{out.close();}catch(Exception ex){}            try{in.close();}catch(Exception ex){}        return null;        }        try{out.close();}catch(Exception ex){}        try{in.close();}catch(Exception ex){}        return result;    }   

 

Java URLConnection實現HTTP的GET/POST