慕哥7786388
2016-06-07 14:36
package com.imooc.servlet; import java.io.File; import java.io.IOException; import java.sql.SQLException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.jspsmart.upload.SmartUpload; import com.jspsmart.upload.SmartUploadException; /** * Servlet implementation class SmartUploadServlet */ @WebServlet("/SmartUploadServlet") public class SmartUploadServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public SmartUploadServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doPost(request,response); } /** * @throws ServletException * @throws IOException * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //设置文件保存路径 String path = getServletContext().getRealPath("/")+"image"; File file = new File(path); if(file.exists()){ file.mkdirs(); } SmartUpload su = new SmartUpload(); String result = "文件上传成功"; //初始化SmartUpload对象 getServletConfig()返回一个ServletConfig对象,通过该对象可以获得该servlet的初始化参数 su.initialize(getServletConfig(),request, response); //设置上传文件的大小为10M su.setMaxFileSize(1024*1024*10); //设置上传文件的总大小为100M su.setTotalMaxFileSize(1024*1024*100); //设置允许上传文件的类型 su.setAllowedFilesList("txt,jpg,png,gif"); //设置不允许上传类型 try { // su.setDeniedFilesList("jsp,js,rar"); //上传文件 su.upload(); int count = su.save(path); System.out.println("上传成功了"+count+"个文件"); // } catch (SQLException e) { // // TODO Auto-generated catch block // result = "上传失败"; // e.printStackTrace(); } catch (Exception e) {//这儿不能写成SmartUploadException 如果这样就会转发到异常信息页面而不是转发到02.jsp页面 // TODO Auto-generated catch block System.out.println(e.getMessage()); if(e.getMessage().indexOf("1015")!=-1){ result = "上传失败:上传文件类型不正确"; }else if(e.getMessage().indexOf("1010")!=-1){ result = "上传失败:上传文件类型不正确"; }else if(e.getMessage().indexOf("1005")!=-1){ result = "上传失败:大小超过单个上传文件的最大值"; }else if(e.getMessage().indexOf("1110")!=-1){ result = "上传失败:总大小超过所有上传文件的最大值"; } e.printStackTrace(); } request.setAttribute("result", result); request.getRequestDispatcher("jsp/02.jsp").forward(request, response); } }
这个Exception是最大的异常 只要是出现异常就会打印堆栈,可是写成SmartException的话 一旦出现其他异常就还需要另外一个try catch。 代码看起来会很嵌套繁琐,这个只是练习所以这么写的
这个Exception是最大的异常 只要是出现异常就会打印堆栈,可是写成SmartException的话 一旦出现其他异常就还需要另外一个try catch 代码看起来会很嵌套繁琐,这个只是练习所以这么写的
Java中的文件上传下载
77391 学习 · 337 问题
相似问题