欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识！
您现在的位置是： 首页

Springboot 配置跳转html + 文件的上传下载

程序员文章站 2022-03-11 15:42:08
...
1. 引入相关依赖， 重点是thymeleaf依赖
pom.xml

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
2.在 application.properties 【src/main/resources】配置
spring.thymeleaf.cache=false
spring.thymeleaf.prefix=classpath:/templates/
3.html文件

Springboot 配置跳转html + 文件的上传下载

fileUpload.html 

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"  
      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<meta charset="UTF-8" />
<title>fileUpload page</title>
</head>
<body>
    <h1 th:inlines="text">文件上传</h1>
    <form action="fileUpload" method="post" enctype="multipart/form-data">
        <p>选择文件: <input type="file" name="fileName"/></p>
        <p><input type="submit" value="提交"/></p>
    </form>
</body>
</html>

multifileUpload.html 

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"  
      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<meta charset="UTF-8" />
<title>multifileUpload page</title>
</head>
<body>
    <h1 th:inlines="text">文件上传</h1>
    <form action="multifileUpload" method="post" enctype="multipart/form-data" >
        <p>选择文件1: <input type="file" name="fileName"/></p>
        <p>选择文件2: <input type="file" name="fileName"/></p>
        <p>选择文件3: <input type="file" name="fileName"/></p>
        <p><input type="submit" value="提交"/></p>
    </form>
</body>
</html>
4.我这边是用文件上传的demo测试的，顺便把文件上传的controller代码也贴一下：

FileUploadController.java

package com.example.demo;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

@Controller  //此处必须是@Controller，@RestController不行  
public class FileUploadController {
    private final static Logger logger = LoggerFactory.getLogger(MyController.class);

    /**
     http://ip:port/file
    */
    @RequestMapping("/file")
    public String file() {
        logger.info("单文件上传页面");
        return "/fileUpload";
    }

    /**
     http://ip:port/multifile
    */
    @RequestMapping("/multifile")
    public String multifile() {
        logger.info("多文件上传页面");
        return "/multifileUpload";
    }

    /**
     * 实现单文件上传
     *http://ip:port/fileUpload
     * */
    @RequestMapping("fileUpload")
    @ResponseBody 
    public String fileUpload(@RequestParam("fileName") MultipartFile file){
        if(file.isEmpty()){
            return "this file is empty";
        }
        String fileName = file.getOriginalFilename();
        int size = (int) file.getSize();
        System.out.println(fileName + "-->" + size);

        String path = "F:/test" ;//文件保存路径
        File targetFile = new File(path + "/" + fileName);
        if(!targetFile.getParentFile().exists()){ //判断文件父目录是否存在
            targetFile.getParentFile().mkdir();
        }
        try {
            file.transferTo(targetFile); //保存文件
            return "upload file success";
        } catch (IllegalStateException e) {
            e.printStackTrace();
            return "upload file fail";
        } catch (IOException e) {
            e.printStackTrace();
            return "upload file fail";
        }
    }

    /**
     * 实现多文件上传
     * http://ip:port/multifileUpload
     * */
    @RequestMapping(value="multifileUpload",method=RequestMethod.POST) 
    public @ResponseBody String multifileUpload(HttpServletRequest request){

        List<MultipartFile> files = ((MultipartHttpServletRequest)request).getFiles("fileName");

        if(files.isEmpty()){
            return "this file is empty";
        }

        String path = "F:/test" ;

        for(MultipartFile file:files){
            String fileName = file.getOriginalFilename();
            int size = (int) file.getSize();
            System.out.println(fileName + "-->" + size);

            if(file.isEmpty()){
                return "this file is empty";
            }else{        
                File targetFile= new File(path + "/" + fileName);
                if(!targetFile.getParentFile().exists()){ //判断文件父目录是否存在
                    targetFile.getParentFile().mkdir();
                }
                try {
                    file.transferTo(targetFile);
                }catch (Exception e) {
                    e.printStackTrace();
                    return "upload file fail";
                } 
            }
        }
        return "upload file success";
    }

    @RequestMapping("download")
    public String downLoad(HttpServletResponse response){
        String filename="test.jpg";
        String filePath = "F:/test" ;
        File file = new File(filePath + "/" + filename);
        if(file.exists()){ //判断文件父目录是否存在
            response.setContentType("application/force-download");
            response.setHeader("Content-Disposition", "attachment;fileName=" + filename);

            byte[] buffer = new byte[1024];
            FileInputStream fis = null; //文件输入流
            BufferedInputStream bis = null;

            OutputStream os = null; //输出流
            try {
                os = response.getOutputStream();
                fis = new FileInputStream(file); 
                bis = new BufferedInputStream(fis);
                int i = bis.read(buffer);
                while(i != -1){
                    os.write(buffer);
                    i = bis.read(buffer);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            System.out.println("file download:  " + filename);
            try {
                bis.close();
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

}
5.访问

Springboot 配置跳转html + 文件的上传下载
Springboot 配置跳转html + 文件的上传下载

相关标签： springboot 文件上传下载 跳转html

上一篇： 2015年将是云计算快速成长的一年？

下一篇： SpringBoot文件上传下载

推荐阅读