保存URL返回的文件

//文件名，System.getProperty下面说明

String filename = sdf.format(new Date()) + "_11.pdf"; 

String file = System.getProperty("cdncharge_pdf") + filename;

 URL urls = null; 

try { 

//url是网页路径

 urls = new URL(url); 

HttpURLConnection conn = (HttpURLConnection) urls.openConnection();

 conn.setConnectTimeout(5 * 1000); conn.setRequestMethod("GET");

 conn.setRequestProperty("Connetion", "Keep-Alive");

 InputStream inputStream = conn.getInputStream(); 

FileOutputStream f = new FileOutputStream(file); 

 byte[] buffer = new byte[1024]; 

 int count = 0; 

 while ((count = inputStream.read(buffer)) > 0) { 

 f.write(buffer, 0, count); 

 } 

 f.close();

 inputStream.close(); 

} 

catch (Exception e) {

 e.printStackTrace(); 

 }

 

2.在xml文件里配置监听器，指向Java文件

public class ApplicationListener implements WebAppInit {

public void init(WebApp arg0) throws Exception {

String cdncharge_pdf = null;

cdncharge_pdf  = "D:/apache-tomcat-.0.32/webapps/cdncharge/cdndomaingrouppdf/";

File file = new File(cdncharge_pdf );

if(!file.exists()){

logger.info("cdncharge path not exists make dirs completed");

file.mkdirs();

}

System.setProperty("cdncharge_pdf", cdncharge_pdf);

....................................

}

}