远程下载文件

默认信任远程核心服务

	  /** 
	    * 远程下载文件并读取返回 
	    * @param filePath 文件网络地址 http://www.baidu.com/1.txt 
	    * @return String 
	    */  
	   public String DownAndReadFile(String filePath){  
	       String date = new SimpleDateFormat("yyyy-MM-dd").format(new Date());      
	       File savePath = new File("D://"+date);//创建新文件  
	       if (!savePath.exists()) {   
	           savePath.mkdir();   
	       }  
	       String[] urlname = filePath.split("/");  
	       int len = urlname.length-1;  
	       String uname = urlname[len];//获取文件名   
	       System.out.println("uname:"+uname);
	       try {  
	           File file = new File(savePath+"//"+uname);//创建新文件  
	           if(file!=null && !file.exists()){  
	               file.createNewFile();  
	           }  
	           OutputStream oputstream = new FileOutputStream(file);  
	           URL url = new URL(filePath); 
	           
	           HttpsURLConnection uc = (HttpsURLConnection) url.openConnection();  
	           uc.setHostnameVerifier(new HostnameVerifier()   
	           {         
	               public boolean verify(String hostname, SSLSession session)   
	               {   
	                   return true;   
	               }   
	           }); 
	           
	           uc.setDoInput(true);//设置是否要从 URL 连接读取数据,默认为true   
	           uc.connect();  
	           InputStream iputstream = uc.getInputStream();  
	           System.out.println("file size is:"+uc.getContentLength());//打印文件长度   
	           byte[] buffer = new byte[4*1024];  
	           int byteRead = -1;     
	           while((byteRead=(iputstream.read(buffer)))!= -1){  
	               oputstream.write(buffer, 0, byteRead);  
	           }  
	           oputstream.flush();    
	           iputstream.close();  
	           oputstream.close();  
	           //读取文件   
	           StringBuffer strb = new StringBuffer();  
	           FileInputStream fs = new FileInputStream(new File(savePath+"//"+uname));  
	           InputStreamReader isr = new InputStreamReader(fs,"UTF-8");  
	           BufferedReader br = new BufferedReader(isr);  
	           String data = "";  
	           while((data = br.readLine()) != null){  
	               strb.append(data + "\n");  
	           }  
	           br.close();  
	           fs.close();  
	           isr.close();  
	           System.out.println(strb.toString());  
	           return strb.toString();  
	             
	    } catch (Exception e) {  
	        System.out.println("读取失败！");  
	        e.printStackTrace();  
	    }     
	       return null;  
	   }

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