上传文件问题?

package com.itheima.web.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.annotation.WebServlet;
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.tomcat.util.http.fileupload.IOUtils;
import org.fujb.commons.CommonsUtil;

@WebServlet("/AddFileServlet")
public class AddFileServlet extends HttpServlet {
   private static final long serialVersionUID = 1L;

   protected void doGet(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {
       doPost(request, response);
   }

   protected void doPost(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {
       // 使用FileUpload完成文件上传
       /**
       * 使用Commons-FileUpload完成文件上传的步骤： * 1、生成工厂类 DiskFileItemFactory *
       * 2、生成解析器类 ServletFileUpload * 3、解析request对象，的到表单项的对象的集合List
       * <FileItem> * 4、遍历list集合，获取相关表单项的值
       */

       // 创建工厂类
       DiskFileItemFactory factory = new DiskFileItemFactory();
       // 设置文件的缓存路径
       factory.setRepository(new File("D:/upload"));
       // 设置上传的文件大于多少的时候需要缓存，即大小限制
       factory.setSizeThreshold(1024 * 1024 * 3);

       // 创建解析器类，需要工厂类作为参数
       ServletFileUpload fileUpload = new ServletFileUpload(factory);

       // 如果文件名出现中文，并且中文乱码，就可以通过一下设置规避
       fileUpload.setHeaderEncoding("UTF-8");

       try {
           // 解析request，得到表单项对象的集合
           List<FileItem> list = fileUpload.parseRequest(request);

           for (FileItem fileItem : list) {
               if (fileItem.isFormField()) {
                   // 是普通表单项
                   // 获取普通项的值
                   // String value = fileItem.getString();
                   // 对普通项中文乱码的处理
                   String value = fileItem.getString("UTF-8");
                   // 获取当前表单项的name的值
                   String fieldName = fileItem.getFieldName();

                   System.out.println("表单项name ： " + fieldName + ", 值是： " + value);

               } else {
                   // 是文件表单项
                   // 获取文件名
                   String fileName = fileItem.getName();
                   System.out.println("文件名： " + fileName);
                   // 获取唯一文件名
                   fileName = CommonsUtil.UUID() + "_" + fileName;

                   // 目录分离
                   String hexString = Integer.toHexString(fileName.hashCode());
                   String path = hexString.charAt(0) + "/" + hexString.charAt(1);

                   File destFile = new File("D:/upload/" + path);
                   destFile.mkdirs();

                   File file = new File(destFile, fileName);
                   OutputStream out = new FileOutputStream(file);

                   // 文件流
                   InputStream in = fileItem.getInputStream();

                   // 拷贝文件流
                   IOUtils.copy(in, out);

                   // 释放资源
                   IOUtils.closeQuietly(in);
                   IOUtils.closeQuietly(out);

               }
           }

       } catch (FileUploadException e) {
           e.printStackTrace();
       }

   }

}

// 释放资源
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);这个位置显示错误,说安静地关闭未定义怎么解决?(The method closeQuietly(OutputStream) is undefined for the type IOUtils)

慕姐8946757

浏览 1238回答 1

上传文件问题?

1回答