包下载路径就不给了.自己随便google一下都可以找到
方法一: commons-fileupload-1.1.1.jar开源包:
boolean isMultipart = org.apache.commons.fileupload.FileUploadBase
.isMultipartContent(request);
// Create a factory for disk-based file items
if(isMultipart)
{
DiskFileItemFactory factory = new DiskFileItemFactory();
// 设置大文件的缓冲目录
factory.setRepository(new File(this.getFilePathRepository()));
// 设置内存缓冲大小
factory.setSizeThreshold(this.getSizeThreshold());
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// 设置文件的最大字节数
upload.setSizeMax(this.getSizeMax());
// 设置响应的字符编码
httpServletResponse.setCharacterEncoding(this
.getResponseCharacterEncoding());
this.getFileNames().clear();
// Parse the request
try
{
List items = upload.parseRequest(request);
// Process the uploaded items
for(Object itemT : items)
{
FileItem item = (FileItem) itemT;
if(!item.isFormField())
{
// 文件名有可能包含路径
String name = item.getName();
if(name == null || name.length() < 1
|| item.getSize() < 1)
{
continue;
}
try
{
// 去掉文件名的路径
name = (new File(name)).getName();
String path = this.getFilePathCurrent() + "/"
+ name;
item.write(new File(path));
this.fileNames.add(path);
request
.setAttribute("msg",
"save file successful!");
}
catch (Exception e)
{
e.printStackTrace();
}
}
else
{
//parameter
String par = item.getFieldName();
//value
System.out.println(par+"->"+item.getString());
//processUploadedFile(item);
}
}
if(request.getAttribute("msg") == null)
{
request.setAttribute("msg", "save file failed!");
this
.receivingCompleted(false, request,
httpServletResponse);
}
else
{
this.receivingCompleted(true, request, httpServletResponse);
}
}
catch (FileUploadException e)
{
e.printStackTrace();
this.receivingCompleted(false, request, httpServletResponse);
}
}
else
{
System.out.println("isMultipartContent = false");
this.receivingCompleted(false, request, httpServletResponse);
}
方法二: oreilly开源包
String projectName = null, fileName = null,dirName="E:/upload";
try
{
// Use an advanced form of the constructor that specifies a
// character
// encoding of the request (not of the file contents) and a file
// rename policy.
MultipartRequest multi = new MultipartRequest(request, dirName,
10 * 1024 * 1024, "ISO-8859-1",
new DefaultFileRenamePolicy());
projectName = multi.getParameter("projectName");
System.out.println("projectName = " + projectName);
Enumeration params = multi.getParameterNames();
while (params.hasMoreElements())
{
String name = (String) params.nextElement();
String value = multi.getParameter(name);
if(name == "projectName")
projectName = value;
System.out.println(name + "=" + value);
}
System.out.println();
System.out.println("FILES:");
Enumeration files = multi.getFileNames();
while (files.hasMoreElements())
{
String name = (String) files.nextElement();
String filename = multi.getFilesystemName(name);
String originalFilename = multi.getOriginalFileName(name);
String type = multi.getContentType(name);
File f = multi.getFile(name);
System.out.println("name: " + name);
System.out.println("filename: " + filename);
System.out.println("originalFilename: " + originalFilename);
System.out.println("type: " + type);
if(f != null)
{
System.out.println("f.toString(): " + f.toString());
System.out.println("f.getName(): " + f.getName());
fileName = f.getName();
System.out.println("f.exists(): " + f.exists());
System.out.println("f.length(): " + f.length());
}
System.out.println();
}
// ArrayList<Project> projects = (ArrayList<Project>) session
// .getAttribute("projects");
// System.out.println("projectName, fileName = " + projectName + ", "
// + fileName);
// Project p = new Project(projectName, fileName);
// System.out.println("PROJ = " + p);
// projects.add(p);
}
catch (IOException lEx)
{
lEx.printStackTrace();
}
方法三: jspsmartupload.jar开源包
selectfile.jsp---->web.xml >servletUpload.java 基本就是这么个结构
下面是代码:
//selectfile.jsp
<%@ page contentType="text/html;charset=GBK" %>
<html>
<head>
<title>file upload</title>
</head>
<body>
<font size="5" color="#FF0000">
<b>文件上传 - 使用jspsmart upload组件</b>
</font><br>
<form name="selectfile" enctype="multipart/form-data" method="post" action="servletUpload">
<p>文件名称：
<input type="file" name="ulfile" size="20" maxlength="80"><br>
</p>
<p>上传路径：
<input type="text" name="PATH" size="30" maxlength="50"><br>
</p>
<p>附加内容：
<input type="text" name="other" size="30" maxlength="50"><br>
</p>
<p>
<input type="submit" value="上传">
<input type="reset" value="清除">
</p>
</form>
</body>
</html>
//servletUpload.java
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import com.jspsmart.upload.*;
public class servletUpload extends HttpServlet {
private ServletConfig config;
/**
* 初始化Servlet
*/
final public void init(ServletConfig config) throws ServletException {
this.config = config;
}
/**
* 处理GET请求
*/
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
out.println("<HTML>");
out.println("<BODY BGCOLOR='white'>");
out.println("<H1>jspSmartUpload : Servlet Sample</H1>");
out.println("<HR><BR>");
out.println("The method of the HTML form must be POST.");
out.println("</BODY>");
out.println("</HTML>");
}
/**
* 响应POST请求
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
out.println("<HTML>");
out.println("<BODY BGCOLOR='white'>");
out.println("<H1>jspSmartUpload : Servlet Sample</H1>");
out.println("<HR>");
// 变量定义
int count=0;
SmartUpload mySmartUpload = new SmartUpload();
try {
// 初始化
mySmartUpload.initialize(config,request,response);
// 上载
mySmartUpload.upload();
com.jspsmart.upload.File f1 = mySmartUpload.getFiles().getFile(0);
String name = f1.getFileName();
// System.out.println (name);
// 保存上载文件到指定目录
// PATH为form表单提交过来的
count = mySmartUpload.save(mySmartUpload.getRequest().getParameter("PATH"));
//other为form表单提交过来的
String other=mySmartUpload.getRequest().getParameter("other"); //这里可以对other进行处理
//request.getParameter("PATH");request.gerParameter("other");
// 显示处理结果
out.println(count + " file uploaded.");
} catch (Exception e){
out.println("Unable to upload the file.<br>");
out.println("Error : " + e.toString());
}
out.println("</BODY>");
out.println("</HTML>");
}
}
//web.xml的配置如下:
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<servlet>
<servlet-name>upload</servlet-name>
<servlet-class>servletUpload</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>upload</servlet-name>
<url-pattern>servletUpload</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>selectfile.jsp</welcome-file>
</welcome-file-list>
</web-app>
需要在WEB-INF\lib中引入jspsmart这个包,上网找一下就有,很多都有的下 www.jspsmart.com 这里是他的官方网站.把编译后的class文件放到WEB-INF\classes下就可以运行了.
这里面用到了jspsmart提供的mySmartUpload.getRequest().getParameter("other"); 这个东西,由于开始的时候觉得PATH地址没有必要传递就早早的把这条代码删掉了,后来就想用request.getParameter("")这个得到信息,可是总是出错.在网上找了N多文章,很多人面临同样的困难.于是想用逻辑关系把这种情况避免掉.就是用单独的form上传用另一个form往数据库里录入.可是录入的时候又得不到要上传的文件名,我是想把文件名存到数据库里的.如果一定要得的话就得放到session里去,一想这样太麻烦,弄不好还容易出bug,要是把临时信息放到数据库里去,有多人一起操作的话又是个问题,其中还遇到了想往file的属性value里写信息的问题.只能读,不能写,就是这个结果.每次都是快成功的时候就卡在这样的小地方了.于是上网查找其他组件看看能不能有相应的功能.这时候使用了fileupload这个组件,网友使用的情况来看这个也要好于jspsmart可是同样没找到getParameter这样的方法.
于是继续在网上搜,结果找到自己原来用的那段代码,发现...原来mySmartUpload.getRequest().getParameter就可以实现了.巨汗啊.现在改成这个样子,可以运行了.不过也许后面还要改成其他的组件,使上传的数据更稳定一些.现在就先这样了,商务逻辑已经实现了
// 变量定义
/*int count=0;
SmartUpload mySmartUpload = new SmartUpload();
try {
// 初始化
mySmartUpload.initialize(config,request,response);
mySmartUpload.setAllowedFilesList("doc,txt");
mySmartUpload.setDeniedFilesList("exe,bat,jsp,htm,html,xml,");
// 上载
mySmartUpload.upload();
com.jspsmart.upload.File f1 = mySmartUpload.getFiles().getFile(0);
// 保存上载文件到指定目录
// PATH为form表单提交过来的
count = mySmartUpload.save("e:/current2");
//other为form表单提交过来的
String other=mySmartUpload.getRequest().getParameter("other"); //这里可以对other进行处理
//request.getParameter("PATH");request.gerParameter("other");
// 显示处理结果
System.out.println(count + " file uploaded.");
} catch (Exception e){
System.out.println("Unable to upload the file.<br>");
System.out.println("Error : " + e.toString());
}
com.jspsmart.upload.Request re = mySmartUpload.getRequest();
Enumeration params = re.getParameterNames();
while (params.hasMoreElements())
{
String name = (String) params.nextElement();
String value = re.getParameter(name);
System.out.println(name + "=->" + value);
}
System.out.println("end2");*/