JSP页面：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head> <body>
<form action="UploadServlet" enctype="multipart/form-data" method="post">
用户姓名：<input type="text" name="userName" /><br/>
上传头像：<input type="file" name="userPhoto" /><br/>
<input type="submit" value="提交">
</form>
</body>
</html>
Servlet代码：
package com.gy.servlet; import java.io.IOException;
import java.io.PrintWriter; import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import com.jspsmart.upload.File;
import com.jspsmart.upload.SmartUpload; public class UploadServlet extends HttpServlet { /**
* Constructor of the object.
*/
public UploadServlet() {
super();
} /**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
} /**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
} /**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { response.setContentType("text/html");
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
try{
SmartUpload su = new SmartUpload();//创建SmartUpload对象
su.setCharset("utf-8");//设置编码
su.initialize(this.config,request,response);//初始化设置
su.setAllowedFilesList("gif,bmp,jpg");//设置允许上传的文件扩展名
su.setMaxFileSize(2*1024*1024);//设置单个文件允许最大长度(单位：字节)
su.setTotalMaxFileSize(10*1024*1024);//设置上传文件的总大小(单位：字节)
su.upload();//将文件数据上传
//注意：使用SmartUpload对象获取request这句代码要放在upload()方法后面，否则拿不到数据
out.print(su.getRequest().getParameter("userName"));
File f = su.getFiles().getFile(0);//获取第一个上传文件
String savePath = "upload\\";
savePath += f.getFileName();//组装存储路径
f.saveAs(savePath);//将文件保存到指定位置
out.println("上传成功！");
}catch(Exception ex){
ex.printStackTrace();
out.println("上传异常："+ex.getMessage());
}
out.flush();
out.close();
} private ServletConfig config;
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init(ServletConfig config) throws ServletException {
// Put your code here
this.config = config;
} }