HTTP send Get - Java Network

Java examples for Network:Http

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Description

HTTP send Get

Demo Code


//package com.java2s;
import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

public class Main {

    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        String urlNameString = url;
        try {/*ww  w  . ja va2 s. c  o m*/
            if (param != null) {
                urlNameString = url + "?" + param;
            }
            URL realUrl = new URL(urlNameString);
            // ?URL?
            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();
            // 
            Map<String, List<String>> map = connection.getHeaderFields();
            // ?
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            //  BufferedReader?URL
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("?GET" + e);
            e.printStackTrace();
        } finally {
            // finally
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }
}

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