文件上传之传统方式上传代码回顾
1.在index.jsp编写如下代码:
<%--
Created by IntelliJ IDEA.
User: Adair
Date: 2020/7/2 0002
Time: 16:07
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>首页</title>
</head>
<body>
<h3>传统文件上传</h3>
<form action="/file/fileUpload01" method="post" enctype="multipart/form-data">
选择文件:<input type="file" name="upload" /><br/>
<input type="submit" value="上传" />
</form>
</body>
</html>
- 创建文件上传控制器类控制器类的代码如下:
package com.txw.controller;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.util.List;
import java.util.UUID;
/**
* 文件上传的处理类
* @author Adair
*/
@Controller
@RequestMapping(path = "/file")
@SuppressWarnings("all") // 注解警告信息
public class FileUploadController {
/**
* 文件上传
* @return
*/
@RequestMapping(path = "/fileUpload01")
public String fileUpload01(HttpServletRequest request) throws Exception{
System.out.println("文件上传");
// 使用fileupload组件完成文件上传
// 上传的位置
String path = request.getSession().getServletContext().getRealPath("/uploads/");
System.out.println(path);
// 判断,该路径是否存在
File file = new File(path);
if(!file.exists()){
// 创建该文件夹
file.mkdirs();
}
// 解析request对象,获取上传文件项
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
// 解析request
List<FileItem> items = upload.parseRequest(request);
// 遍历文件项
for(FileItem item:items){
// 进行判断,当前item对象是否是上传文件项
if(item.isFormField()){
// 说明普通表单向
}else{
// 说明上传文件项
// 获取上传文件的名称
String filename = item.getName();
// 把文件的名称设置唯一值,uuid
String uuid = UUID.randomUUID().toString().replace("-", "");
filename = uuid+"_"+filename;
// 完成文件上传
item.write(new File(path,filename));
// 删除临时文件
item.delete();
}
}
return "success";
}
}
3.使用TomCat运行结果如图:
4.通过浏览器访问http://localhost:8080/index.jsp结果如图所示:
5.点击上传会跳转到如图所示的界面:
6.控制台打印结果如图所示:
7.查看上传的文件如图所示: