JspSmart 文件上传包，放在WEB-INF/lib下
uploadForm.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath%>" />
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>test</title>
<link rel="stylesheet" href="">
</head>
<body>
文件上传
<hr>
<form action="UploadServlet" method="post"
enctype="multipart/form-data">
你选择一个文件进行上传：
<input type="file" name="myFile">
<input type="submit" value="上传">
</form>
${msg}
</body>
</html>
UploadServlet.java
package servlets; import java.io.IOException;
import javax.servlet.RequestDispatcher;
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;
import com.jspsmart.upload.SmartUploadException; public class UploadServlet extends HttpServlet {
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
SmartUpload smartUpload = new SmartUpload();
// 初始化
ServletConfig config = this.getServletConfig();
smartUpload.initialize(config, request, response);
try {
// 上传文件
smartUpload.upload();
// 得到上传的文件对象
File smartFile = smartUpload.getFiles().getFile(0);
// 保存文件
smartFile.saveAs("C:/" + smartFile.getFileName(),
smartUpload.SAVE_PHYSICAL);// 保存文件到C盘根目录
} catch (SmartUploadException e) {
e.printStackTrace();
}
String msg = "Upload Success!";
request.setAttribute("msg", msg);
RequestDispatcher rd = request.getRequestDispatcher("/uploadForm.jsp");
rd.forward(request, response);
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>UploadServlet</servlet-name>
<servlet-class>servlets.UploadServlet</servlet-class>
</servlet> <servlet-mapping>
<servlet-name>UploadServlet</servlet-name>
<url-pattern>/UploadServlet</url-pattern>
</servlet-mapping>
</web-app>
文件下载
download.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String filename = request.getParameter("file");
//告诉客户端出现下载框，并指定下载框中的文件名
response.setHeader("Content-Disposition","attachment;filename="+filename);
//指定文件类型
response.setContentType("image/jpeg");
//指定文件
RequestDispatcher rd = request.getRequestDispatcher("/FILES/" + filename);
rd.forward(request, response);
%>
download1.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<body>
文件下载
<hr>
<a href="download.jsp?file=img.jpg">下载</a>
</body>
</html>