-----------------------------jsp页面--------------------------------------------------------------
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
上传文件
-----------------------------后台serverlet--------------------------------------------------------------
package com.cheletong.servlet;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Random;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
/**
* Servlet implementation class MaterialManage
*/
@WebServlet("/FileUpload")
public class FileUpload extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
* @throws IOException
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws IOException {
JSONObject resultJson = new JSONObject();
JSONArray paths = new JSONArray();
Random ran = new Random();
int respCode = -1;
try {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
String uploadPath = getServletContext().getRealPath("/upload");
System.out.println(uploadPath);
String tempPath = uploadPath + "\\temp";
String today = new SimpleDateFormat("yyyyMMdd").format(new Date());
String todayPath = uploadPath + "\\" + today;
if (uploadPath == null) {
return;
}
File uploadDir = new File(uploadPath);
File tempDir = new File(tempPath);
File todayDir = new File(todayPath);
if (!uploadDir.exists()) {
uploadDir.mkdir();
}
if (!tempDir.exists()) {
tempDir.mkdir();
}
if (!todayDir.exists()) {
todayDir.mkdir();
}
if (!ServletFileUpload.isMultipartContent(request)) {
return;
}
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setRepository(tempDir);
factory.setSizeThreshold(1024 * 1024 * 1);
ServletFileUpload sfu = new ServletFileUpload(factory);
sfu.setHeaderEncoding("utf-8");
List fileItems = null;
try {
fileItems = sfu.parseRequest(request);
} catch (FileUploadException e) {
e.printStackTrace();
return;
}
int i;
for (i = 0; i < fileItems.size(); i++) {
FileItem item = fileItems.get(i);
if (!item.isFormField()) {
String itemFullName = item.getName();
if (itemFullName.length() > 0) {
String fileExtension = itemFullName
.substring(itemFullName.lastIndexOf("."));
String fileNewName = new SimpleDateFormat(
"yyyyMMdd_HHmmss").format(new Date())
+ "_"
+ Math.abs(ran.nextInt()) + fileExtension;
File file = new File(todayPath, fileNewName);
try {
item.write(file);
String name = "/upload/" + today + "/"
+ file.getName();
JSONObject path = new JSONObject();
path.put("Path", name);
paths.add(path);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
if(i == fileItems.size()) {
respCode = 0;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
PrintWriter pw = response.getWriter();
resultJson.put("response", respCode);
resultJson.put("data", paths);
pw.write(resultJson.toString());
pw.flush();
pw.close();
}
}
/**
* @throws IOException
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws IOException {
doPost(request, response);
}
}