Java URL Post post(String url, Map parameters)

Description

post

License

Open Source License

Declaration

public static String post(String url, Map<String, String> parameters) throws Exception 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.*;

import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

import java.util.Map;

public class Main {
    public static String post(String url, Map<String, String> parameters) throws Exception {
        URLConnection connection = new URL(url).openConnection();
        connection.setRequestProperty("User-Agent",
                "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36");
        connection.setDoOutput(true);/* w  ww .j  av a 2 s .  co  m*/
        connection.setDoInput(true);
        OutputStreamWriter osw = new OutputStreamWriter(connection.getOutputStream());
        osw.write(parametersToWWWFormURLEncoded(parameters));
        osw.flush();
        osw.close();
        Reader r = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        StringWriter w = new StringWriter();
        char[] buffer = new char[1024];
        int n = 0;
        while ((n = r.read(buffer)) != -1) {
            w.write(buffer, 0, n);
        }
        r.close();
        return w.toString();
    }

    public static String parametersToWWWFormURLEncoded(Map<String, String> parameters) throws Exception {
        StringBuilder s = new StringBuilder();
        for (Map.Entry parameter : parameters.entrySet()) {
            if (s.length() > 0) {
                s.append("&");
            }
            s.append(URLEncoder.encode((String) parameter.getKey(), "UTF-8"));
            s.append("=");
            s.append(URLEncoder.encode((String) parameter.getValue(), "UTF-8"));
        }
        return s.toString();
    }
}

Related

1. post(JSONObject json, String url)
2. post(String url, String content)
3. post(String url, String content)
4. post(String urlstr, String[] params)
5. post(String urlString, HashMap values)