JAVA 实现通过URL下载文件到本地库

 1 /**
 2      * TODO 下载文件到本地
 3      * @author nadim  
 4      * @date Sep 11, 2015 11:45:31 AM
 5      * @param fileUrl 远程地址
 6      * @param fileLocal 本地路径
 7      * @throws Exception 
 8      */
 9     public void downloadFile(String fileUrl,String fileLocal) throws Exception {
10         URL url = new URL(fileUrl);
11         HttpURLConnection urlCon = (HttpURLConnection) url.openConnection();
12         urlCon.setConnectTimeout(6000);
13         urlCon.setReadTimeout(6000);
14         int code = urlCon.getResponseCode();
15         if (code != HttpURLConnection.HTTP_OK) {
16             throw new Exception("文件读取失败");
17         }
18         
19         //读文件流
20         DataInputStream in = new DataInputStream(urlCon.getInputStream());
21         DataOutputStream out = new DataOutputStream(new FileOutputStream(fileLocal));
22         byte[] buffer = new byte[2048];
23         int count = 0;
24         while ((count = in.read(buffer)) > 0) {
25             out.write(buffer, 0, count);
26         }
27         out.close();
28         in.close();
29     }