1.在src下创建filter包，包内Class名UploadFilter
package com.gd.filter;
import org.apache.catalina.servlet4preview.http.HttpServletRequest;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
@WebFilter(urlPatterns = "/upload/*", filterName = "uploadFilter")
public class UploadFilter implements Filter {
//定义文件路径常量
public static final File UPLOAD_FOLDER = new File("F:\\nginx-1.14.2\\html\\upload");//修改上传路径
@Override
public void init(FilterConfig filterConfig) throws ServletException {
System.out.println("初始化uploadFilter");
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
//转换ServletRequest request类型
HttpServletRequest req = (HttpServletRequest) request;
String uri = req.getRequestURI();
int index = uri.lastIndexOf("/");
String fileName = uri.substring(index + 1);
File file = new File(UploadFilter.UPLOAD_FOLDER, fileName);
//输入流
FileInputStream fileInputStream = new FileInputStream(file);
byte[] bs = new byte[(int) file.length()];
fileInputStream.read(bs);
//关闭流
fileInputStream.close();
//转换ServletResponse response类型
HttpServletResponse resp = (HttpServletResponse) response;
resp.getOutputStream().write(bs);
System.out.println("---请求进入--");
}
@Override
public void destroy() {
}
}
2.在控制层（controller）编写交互接口
package com.gd.controller;
import com.gd.filter.UploadFilter;
import org.apache.catalina.servlet4preview.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.IOException;
@RestController
public class UploadController {
/**
* 文件上传
*
* @param multipartFile
* @param request
* @return
*/
@RequestMapping("/uploadFile")
public String uploadFile(@RequestParam("multipartFile") MultipartFile multipartFile,HttpServletRequest request) {
System.out.println(multipartFile.getOriginalFilename());
System.out.println("上传的文件夹路径：" + UploadFilter.UPLOAD_FOLDER);
if (UploadFilter.UPLOAD_FOLDER.exists() == false) {
UploadFilter.UPLOAD_FOLDER.mkdirs();
}
//准备用来接收数据的文件
File uploadFile = new File(UploadFilter.UPLOAD_FOLDER, multipartFile.getOriginalFilename());
try {
multipartFile.transferTo(uploadFile);
} catch (IOException e) {
e.printStackTrace();
}
return "ok";
}
}
3.前端页面上传入口静态页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="/uploadFile" method="post" enctype="multipart/form-data">
<input type="file" name="multipartFile">
<input type="submit" value="提交">
</form>
</body>
</html>
参考文章：http://blog.ncmem.com/wordpress/2023/11/23/springboot%e6%96%87%e4%bb%b6%e4%b8%8a%e4%bc%a0%e4%bb%a3%e7%a0%81%e7%ac%94%e8%ae%b0/
欢迎入群一起讨论
标签：Springboot,UploadFilter,笔记,File,org,import,multipartFile,上传,public From： https://www.cnblogs.com/songsu/p/17852196.html