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; 
    } 
    
}