檔案上傳 commons-fileupload
首先是上傳頁面
fileupload.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'fileUpload.jsp' starting page</title>
</head>
<body>
<br>
檔案一：<input type="file" name="file1" /> <br>
檔案二：<input type="file" name="file2" /> <br>
上傳者: <input type="text" name="uploader"/> <br>
<input type="submit" value="提交"/>
</form>
</body>
</html>
傳如servlet 處理
public class FileUpload extends HttpServlet {
private static final String fileDir = "F:/";
/**
* Constructor of the object.
*/
public FileUpload() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
doPost();
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//設定編碼
response.setContentType("text/html");
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
//核心程式碼
try {
DiskFileItemFactory fileFactory = new DiskFileItemFactory(); //產生工廠
ServletFileUpload fu = new ServletFileUpload(fileFactory); //呼叫工具
fu.setFileSizeMax(30*1024*1024); //設定檔案大小限制
List fileItems = fu.parseRequest(request); // 獲取請求項
Iterator iter = fileItems.iterator();
String uploader = null;
String date = null;
List<String> fileNames = new ArrayList<String>();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if (!item.isFormField()) { // 判斷檔案
String oldFileName = item.getName();
String fieldName = item.getFieldName();
String content = item.getString();
String type = item.getContentType();
String newFileName = null;
// System.out.println("fileName :" +oldFileName +" and fileName : "+ fieldName + " and content :" + content + " and type "+ type);
int delimiter = oldFileName.lastIndexOf("/");
// System.out.println(delimiter);
if (delimiter == -1) {
newFileName = oldFileName.substring(delimiter + 1);
System.out.println(newFileName);
}else{
newFileName = oldFileName;
}
if(newFileName != null && !newFileName.trim().equals("")){
fileNames.add(newFileName);
item.write(new File(fileDir + "first.txt")); // 設定寫入地址，自己設定
}
} else { // 表單
String fieldName = item.getFieldName();
if ("uploader".equals(fieldName)) {
uploader = item.getString();
} else if ("date".equals(fieldName)) {
date = item.getString();
}
}
}
System.out.println("forword");
// request.setAttribute("fileNames",fileNames);
// request.getRequestDispatcher("../admin/fileUploadResult.jsp").forward(request, response); // 後續處理
} catch (Exception e) {
}
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}