版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/Eudemon_yf/article/details/82625532
package com.yangfei.servlet; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.List; 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.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.io.IOUtils; /** * @author yangfei */ public class FileUploadServlet2 extends HttpServlet { @Override public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { //1、创建磁盘文件项工厂 //作用:设置缓存文件的大小 设置临时文件存储的位置 String path_temp = this.getServletContext().getRealPath("temp"); //DiskFileItemFactory factory = new DiskFileItemFactory(1024*1024, new File(path_temp)); DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(1024*1024); factory.setRepository(new File(path_temp)); //2、创建文件上传的核心类 ServletFileUpload upload = new ServletFileUpload(factory); //设置上传文件的名称的编码 upload.setHeaderEncoding("UTF-8"); //ServletFileUpload的API //判断表单是否是文件上传的表单 boolean multipartContent = ServletFileUpload.isMultipartContent(request); if(multipartContent){ //是文件上传的表单 //***解析request获得文件项集合 List<FileItem> parseRequest = upload.parseRequest(request); if(parseRequest!=null){ for(FileItem item : parseRequest){ //判断是不是一个普通表单项 boolean formField = item.isFormField(); if(formField){ //username=zhangsan String fieldName = item.getFieldName(); //对普通表单项的内容进行编码 String fieldValue = item.getString("UTF-8"); System.out.println(fieldName+"----"+fieldValue); //当表单是enctype="multipart/form-data"时 request.getParameter相关的方法 //String parameter = request.getParameter("username"); }else{ //文件上传项 //文件的名 String fileName = item.getName(); //获得上传文件的内容 InputStream in = item.getInputStream(); String path_store = this.getServletContext().getRealPath("upload"); OutputStream out = new FileOutputStream(path_store+"/"+fileName); IOUtils.copy(in, out); in.close(); out.close(); //删除临时文件 item.delete(); } } } }else{ //不是文件上传表单 //使用原始的表单数据的获得方式 request.getParameter(); } } catch (FileUploadException e) { e.printStackTrace(); } } @Override public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }