文件上传解决方案（基于jspsmartupload）
这个程序是苦于jspsmartupload而完成的，大家可以自已去下载jspsmartupload.jar包。
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<servlet>
<description>This is the uploadfile</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>UploadServlet</servlet-name>
<servlet-class>test.UploadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UploadServlet</servlet-name>
<url-pattern>/servlet/UploadServlet</url-pattern>
</servlet-mapping>
</web-app>
index.jsp文件
<html>
<head>
<title> Jspsmart.html </title>
<meta http-equiv ="Content-Type" content ="text/html; charset=GB2312">
</head>
<body>
<center>该文件上传共有两种方法，一种是在jsp页面上进行上<br>
传，另一种是用servlet进行上传，只需要改form表单的action即可</center>
<h2> 文件上传范例 - jspSmart </h2>
<form name ="Form1" enctype ="multipart/form-data" method ="post" action ="servlet/UploadServlet">
<p> 上传文件 1： <input type ="file" name ="File1" size ="20" maxlength ="20"></p>
<p> 上传文件 2： <input type ="file" name ="File2" size ="20" maxlength ="20" ></p>
<input type ="submit" value ="上传">
<input type ="reset"alue ="清除">
</form>
<br>
<a href="download.jsp">下载测试</a>
</body>
</html>
jspsmart文件
<%@ page import="com.jspsmart.upload.*" %>
<%@ page contentType="text/html;charset=GB2312" %>
<html>
<head>
<title>CH9 - Jspsmart2.jsp</title>
</head>
<body>
<h2>文件上传范例 - jspSmart</h2>
<jsp:useBean id="mySmartUpload" scope="page" class="SmartUpload"/>
<%
//计算文件上传个数
int count=0;
//SmartUpload的初始化，使用这个jspsmart一定要在一开始就这样声明
mySmartUpload.initialize(pageContext);
//依据form的内容上传
mySmartUpload.upload();
//将上传的文件一个一个取出来处理
for (int i=0;i<mySmartUpload.getFiles().getCount();i++)
{
//取出一个文件
com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(i);
//如果文件存在，则做存档操作
if (!myFile.isMissing()) {
//将文件存放于绝对路径的位置
myFile.saveAs("C:\\upload\\" + myFile.getFileName(),SmartUpload.SAVE_PHYSICAL);
//显示此上传文件的详细信息
out.println("FieldName = " + myFile.getFieldName() + "<BR>");
out.println("Size = " + myFile.getSize() + "<BR>");
out.println("FileName = " + myFile.getFileName() + "<BR>");
out.println("FileExt = " + myFile.getFileExt() + "<BR>");
out.println("FilePathName = " + myFile.getFilePathName() + "<BR>");
out.println("ContentType = " + myFile.getContentType() + "<BR>");
out.println("ContentDisp = " + myFile.getContentDisp() +"<BR>");
out.println("TypeMIME = " + myFile.getTypeMIME() +"<BR>");
out.println("SubTypeMIME = " + myFile.getSubTypeMIME() + "<BR>");
count ++;
}
}
// 显示应该上传的文件数目
out.println("<BR>" + mySmartUpload.getFiles().getCount() + " files could be uploaded.<BR>");
// 显示成功上传的文件数目
out.println(count + "file(s) uploaded.");
%>
</body>
</html>
UploadServlet.java文件（这是一个servlet）
package test;
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 {
response.setContentType("text/html");
request.setCharacterEncoding("GBK");
response.setCharacterEncoding("GBK");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* 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("GBK");
response.setCharacterEncoding("GBK");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head><title>JspSmartUploadSaveServlet</title></head>");
out.println("<body bgcolor=\"#ffffff\">");
saveFile(request, response, out);
out.println("<p>文件保存完成" + request.getMethod() +".<a href=\"index.html\">继续上传文件</a></p>");
out.println("</body>");
out.println("</html>");
out.close();
}
private void saveFile(HttpServletRequest request,HttpServletResponse response, PrintWriter out) {
//上传的文件个数
int count = 0;
//文件描述
String FileDescription[] = {null, null, null};
SmartUpload mySmartUpload = new SmartUpload();
ServletConfig servletConfig = getServletConfig();
try {
//SmartUpload之初始化,一定要初始化才可以使用
mySmartUpload.initialize(servletConfig, request, response);
//进行相应处理
mySmartUpload.upload();
//最大文件//20mb
mySmartUpload.setMaxFileSize(20 * 1024 * 1024);
} catch (Exception e) {
}
//取得所有文件信息
File myFile;
for (int i = 0; i < mySmartUpload.getFiles().getCount(); i++) {
//产生1个File对象
myFile = mySmartUpload.getFiles().getFile(i);
//如果文件存在,则把他存入指定位址
if (!myFile.isMissing()) {
try { //save file
myFile.saveAs("c:\\upload\\" + myFile.getFileName(),SmartUpload.SAVE_PHYSICAL);
} catch (Exception ex) {
System.out.println(" error---" + ex.getMessage());
}
out.println("<font color = \"red\">您上传的第" + count +
"个的文件 :</font><BR> ");
out.println("文件名称为 :" + myFile.getFileName() + "<BR>");
out.println("文件类型为 :" + myFile.getContentType() + "<BR>");
out.println("文件说明为 :" + FileDescription[i] + "<BR>");
count++;
}
}
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occure
*/
public void init() throws ServletException {
// Put your code here
}
}