//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);
....................................
}
}