Go语言视频零基础入门到精通

javalearner

1. 从网络下载图片:
2. import java.net.MalformedURLException;
   
3. import java.net.URL;
   
4. import java.io.*;
   
5. public class Testimg{
   
6.   public static void writeFile(String strUrl,String fileName){
   
7.    URL url = null;
   
8.    try {
   
9.     url = new URL(strUrl);
   
10.    } catch (MalformedURLException e2) {
    
11.     e2.printStackTrace();
    
12.    }
    
13.    InputStream is = null;
    
14.    try {
    
15.     is = url.openStream();
    
16.    }catch (IOException e1) {
    
17.     e1.printStackTrace();
    
18.    }
    
19.   OutputStream os = null;
    
20.   File f = new File("d:\webimg");
    
21.   f.mkdirs();
    
22.   try{
    
23.     os = new FileOutputStream("d:\webimg"+fileName);
    
24.     int bytesRead = 0;
    
25.     byte[] buffer = new byte[8192];
    
26.     while((bytesRead = is.read(buffer,0,8192))!=-1){
    
27.        os.write(buffer,0,bytesRead);
    
28.     }
    
29.   }catch(FileNotFoundException e){
    
30.     e.printStackTrace();
    
31.   } catch(IOException e) {
    
32.     e.printStackTrace();
    
33.   }
    
34. }
    
35.    public static void main(String args[]){
    
36.       writeFile("http://www.java3z.com/cwbwebhome/images/logo.gif","logo.gif");
    
37.   }
    
38. }
39. 
    
40.                      

复制代码

  


源码下载：http://file.javaxxz.com/2014/11/3/000202125.zip