安卓基础之Get方式发送http请求

本文参考作者:超超boy 链接:https://www.cnblogs.com/jycboy/p/post01.html

一、在android用Get方式发送http请求，使用的是java标准类。

主要步骤：

1.构造URL

URL url = new URL(String path);

2.设置连接

httpURLConnection = (HttpURLConnection) url.openConnection();
//设置超时时间
httpURLConnection.setConnectTimeout(3000);
//设置请求使用GET方式
httpURLConnection.setRequestMethod("GET");
int responsecode = httpURLConnection.getResponseCode();//返回至为响应编号，如：HTTP_OK表示连接成功。

3.获取返回数据

if(responsecode == HttpURLConnection.HTTP_OK){
inputStream = httpURLConnection.getInputStream();
}   
new InputStreamReader(inputStream,"utf-8")

4.关闭连接

void disconnect()

二、在Eclipse中创建Demo实现get方式的请求的逻辑代码：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL; 

public class HttpUtils { 

    private static String URL_PATH="http://www.baidu.com";
    private static HttpURLConnection httpURLConnection = null;
    public HttpUtils(){}

    public static void main(String[] args){
        shuchu();
    } 

     public static void shuchu(){
        InputStream inputStream = getInputStream();
        String result;
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream,"utf-8"));
            result = "";
            String line = "";
       try {
            while((line = reader.readLine())!= null){
                   result = result+ line;
               }
     } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
   }
          System.out.println(result);
          httpURLConnection.disconnect();
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 

    }
    /**
     * 获取服务端的数据，以InputStream返回
     * @return
     */
    public static InputStream getInputStream(){
        InputStream inputStream = null; 

        try {
            URL url = new URL(URL_PATH);
            if(url != null){
                try {
                    httpURLConnection = (HttpURLConnection) url.openConnection();
                    //设置超时时间
                    httpURLConnection.setConnectTimeout(3000);
                    //设置请求方式
                    httpURLConnection.setRequestMethod("GET");
                    int responsecode = httpURLConnection.getResponseCode();
                    if(responsecode == HttpURLConnection.HTTP_OK){
                        inputStream = httpURLConnection.getInputStream();
                    }
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return inputStream;
    } 

}