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| package com.chen;
import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.List; import java.util.UUID;
import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.ProgressListener; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class FileSerlvet extends HttpServlet { private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if (!ServletFileUpload.isMultipartContent(request)) { return; } String uploadPath =this.getServletContext().getRealPath("/WEB-INF/upload"); File uploadFile = new File(uploadPath); if (!uploadFile.exists()){ uploadFile.mkdir(); } String tmpPath = this.getServletContext().getRealPath("/WEB-INF/tmp"); File file = new File(tmpPath); if (!file.exists()) { file.mkdir(); }
try { DiskFileItemFactory factory = getDiskFileItemFactory(file);
ServletFileUpload upload = getServletFileUpload(factory);
String msg = uploadParseRequest(upload, request, uploadPath); System.out.println(msg); if(msg == "文件上传成功!") { request.setAttribute("msg",msg); request.getRequestDispatcher("info.jsp").forward(request, response); }else { msg ="请上传文件"; request.setAttribute("msg",msg); request.getRequestDispatcher("info.jsp").forward(request, response); }
} catch (FileUploadException e) { e.printStackTrace(); } }
public static DiskFileItemFactory getDiskFileItemFactory(File file) { DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(1024 * 1024); factory.setRepository(file); return factory; }
public static ServletFileUpload getServletFileUpload(DiskFileItemFactory factory) { ServletFileUpload upload = new ServletFileUpload(factory); upload.setProgressListener(new ProgressListener() {
public void update(long pBytesRead, long pContentLength, int pItems) { System.out.println("总大小:" + pContentLength + "已上传:" + pBytesRead); } });
upload.setHeaderEncoding("UTF-8"); upload.setFileSizeMax(1024 * 1024 * 10);
return upload; }
public static String uploadParseRequest(ServletFileUpload upload, HttpServletRequest request, String uploadPath) throws FileUploadException, IOException {
String msg = ""; List<FileItem> fileItems = upload.parseRequest(request); for (FileItem fileItem : fileItems) { if (fileItem.isFormField()) { String name = fileItem.getFieldName(); String value = fileItem.getString("UTF-8"); System.out.println(name + ": " + value); } else {
String uploadFileName = fileItem.getName(); System.out.println("上传的文件名: " + uploadFileName); if (uploadFileName.trim().equals("") || uploadFileName == null) { continue; }
String fileName = uploadFileName.substring(uploadFileName.lastIndexOf("/") + 1); String fileExtName = uploadFileName.substring(uploadFileName.lastIndexOf(".") + 1);
System.out.println("文件信息[件名: " + fileName + " ---文件类型" + fileExtName + "]"); String uuidPath = UUID.randomUUID().toString();
String realPath = uploadPath + "/" + uuidPath; File realPathFile = new File(realPath); if (!realPathFile.exists()) { realPathFile.mkdir(); } InputStream inputStream = fileItem.getInputStream(); FileOutputStream fos = new FileOutputStream(realPath + "/" + fileName);
byte[] buffer = new byte[1024 * 1024]; int len = 0; while ((len = inputStream.read(buffer)) > 0) { fos.write(buffer, 0, len); } fos.close(); inputStream.close(); msg = "文件上传成功!"; fileItem.delete(); } } return msg;
} }
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