Java网络通信之HttpUrlConnection

来源：互联网发布：python编程思想编辑：程序博客网时间：2024/05/17 08:17

Get Post区别：
1.Get数据大小有限制，请求的参数内容直接显示在地址栏里面，相对不安全
2.Post数据没有大小限制，请求的参数内容，不会显示在地址栏里面，相对安全一些

一.Get方式请求

package httpurlconnection;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;/** * Created by Administrator on 2016/7/30. */public class Get {    private static final String path = "http://www.baidu.com";    public static void main(String[] args) {        httpurlconnetionGet(path);    }    public static void httpurlconnetionGet(String path){        try {            URL url = new URL(path);            HttpURLConnection  httpURLConnection= (HttpURLConnection) url.openConnection();            //get方式请求            httpURLConnection.setRequestMethod("GET");            httpURLConnection.setReadTimeout(5000);            httpURLConnection.setConnectTimeout(5000);            //发送请求            httpURLConnection.connect();            if (httpURLConnection.getResponseCode()== HttpURLConnection.HTTP_OK) {                InputStream is = httpURLConnection.getInputStream();                BufferedReader br = new BufferedReader(new InputStreamReader((is)));                String len = null;                while ((len = br.readLine()) != null) {                    System.out.println(len);                }                br.close();            }        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }}

二.Post方式

package httpurlconnection;import java.io.*;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;/** * Created by Administrator on 2016/7/30. */public class Post {    private static final String path = "http://www.baidu.com";    public static void main(String[] args) {        httpurlconnectionPost(path);    }    public static void httpurlconnectionPost(String path){        try {            URL url = new URL(path);            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();            httpURLConnection.setRequestMethod("POST"); //请求方式为POST            httpURLConnection.setReadTimeout(5000);            httpURLConnection.setConnectTimeout(5000);            httpURLConnection.setDoOutput(true);  //设置向服务端写数据            OutputStream os = httpURLConnection.getOutputStream();            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os));            bw.write("sjfsfjssljl");  //向服务端提交数据            bw.close();            httpURLConnection.connect();            if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {  //判断状态码是否为200                InputStream is = httpURLConnection.getInputStream();                BufferedReader br = new BufferedReader(new InputStreamReader(is)); //读取从服务端返回的数据                String len = null;                while ((len = br.readLine()) != null) {                    System.out.println(len);                }                br.close();            }        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }}

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