HTTP send Post - Java Network

Java examples for Network:Http

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Description

HTTP send Post

Demo Code


//package com.java2s;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;

public class Main {
    public static void main(String[] argv) throws Exception {
        String url = "java2s.com";
        String param = "java2s.com";
        System.out.println(sendPost(url, param));
    }//www .  ja va  2s .  c o  m

    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(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)");
            // ?POST
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // URLConnection?
            out = new PrintWriter(conn.getOutputStream());
            // ?
            out.print(param);
            // flush?
            out.flush();
            // BufferedReader?URL
            in = new BufferedReader(new InputStreamReader(
                    conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("? POST " + e);
            e.printStackTrace();
        }
        // finally
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }
}

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