package com.hxzkoa.util;
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import org.apache.commons.fileupload.FileItem;
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import org.apache.commons.fileupload.FileUploadBase;
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import org.apache.commons.fileupload.FileUploadException;
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import org.apache.commons.fileupload.disk.DiskFileItemFactory;
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import org.apache.commons.fileupload.servlet.ServletFileUpload;
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import sun.misc.IOUtils;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.List;
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import java.util.UUID;
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@WebServlet("/UploadServlet")
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public class UploadServlet extends HttpServlet {
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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DiskFileItemFactory factory=new DiskFileItemFactory();
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ServletFileUpload upload=new ServletFileUpload(factory);
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request.setCharacterEncoding("utf-8");
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//文件名中文乱码处理也可以如此写
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// upload.setHeaderEncoding("utf-8");
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//设置缓冲区大小与临时文件目录
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factory.setSizeThreshold(1024*1024*10);
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File uploadTemp=new File("e:\\uploadTemp");
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uploadTemp.mkdirs();
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factory.setRepository(uploadTemp);
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//设置单个文件大小限制
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upload.setFileSizeMax(1024*1024*10);
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//设置所有文件总和大小限制
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upload.setSizeMax(1024*1024*30);
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try {
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List<FileItem> list=upload.parseRequest(request);
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System.out.println(list);
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for (FileItem fileItem:list){
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if (!fileItem.isFormField()&&fileItem.getName()!=null&&!"".equals(fileItem.getName())){
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String filName=fileItem.getName();
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//利用UUID生成伪随机字符串，作为文件名避免重复
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String uuid= UUID.randomUUID().toString();
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//获取文件后缀名
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String suffix=filName.substring(filName.lastIndexOf("."));
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//获取文件上传目录路径，在项目部署路径下的upload目录里。若想让浏览器不能直接访问到图片，可以放在WEB-INF下
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String uploadPath=request.getSession().getServletContext().getRealPath("/upload");
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File file=new File(uploadPath);
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file.mkdirs();
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//写入文件到磁盘，该行执行完毕后，若有该临时文件，将会自动删除
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fileItem.write(new File(uploadPath,uuid+suffix));
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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doPost(request,response);
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}
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}
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