本篇内容介绍了“如何利用springboot、thymeleaf和jquery实现多文件图片上传功能”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<link th:href="@{favicon.ico}" rel="shortcut icon"/>
<title>上传页</title>
<script th:src="@{/webjars/jquery/dist/jquery.js}" type="text/javascript"></script>
</head>
<body>
<div class="con">
<form action="multiUpload" method="post" enctype="multipart/form-data">
<input type="file" name="file"><br/>
<input type="file" name="file"><br/>
如上传图片：会展示最后一个上传的图片： <input type="file" name="file"><br/>
<button type="submit">上传</button>
</form>
<img th:src="${filePath}" width="300px" height="300px">
<div th:if="${ message }">
<h3 th:text="${ message }"/>
</div>
</div>
<div>
下载文件名：
<input type="text" value="" id="fileName"/>
<input type="button" value="下载" onclick="download()"/>
<script>
$(document).ready(function(){
});
function download(){
let fileName = $("#fileName").val();
if(fileName){
window.open("http://" + window.location.host + "/download/" + fileName, '_blank')
}else{
alert("输入文件名")
}
}
</script>
</div>
</body>
</html># 文件路径, 注意路径末尾一定要带上/ user.file.path=E:/upload/
package com.example.springboot_jxc_0511.common;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* 参考：https://blog.csdn.net/sinat_34104446/article/details/100178488
*/
@Component
public class CustomWebConfiguration implements WebMvcConfigurer {
@Value("${user.file.path}")
private String filePath;
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
// 注意如果filePath是写死在这里，一定不要忘记尾部的/或者\\，这样才能读取其目录下的文件
registry.addResourceHandler("/**").addResourceLocations(
"classpath:/META-INF/resources/",
"classpath:/resources/",
"classpath:/static/",
"classpath:/public/",
"file:/" + filePath,
"classpath:/webapp/");
}
}package com.example.springboot_jxc_0511.common;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
public class FileUtil {
public static void download(String filename, HttpServletResponse res) throws IOException {
// 发送给客户端的数据
OutputStream outputStream = res.getOutputStream();
byte[] buff = new byte[1024];
BufferedInputStream bis = null;
// 读取filename
bis = new BufferedInputStream(new FileInputStream(new File("e:/upload/" + filename)));
int i = bis.read(buff);
while (i != -1) {
outputStream.write(buff, 0, buff.length);
outputStream.flush();
i = bis.read(buff);
}
}
}package com.example.springboot_jxc_0511.common;
import com.baomidou.mybatisplus.core.metadata.OrderItem;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.springboot_jxc_0511.common.FileUtil;
import com.example.springboot_jxc_0511.jxc.common.Constants;
import com.example.springboot_jxc_0511.jxc.entity.Product;
import com.example.springboot_jxc_0511.jxc.entity.Sale;
import com.example.springboot_jxc_0511.jxc.entity.Users;
import com.example.springboot_jxc_0511.jxc.service.IProductService;
import com.example.springboot_jxc_0511.jxc.service.ISaleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Date;
import java.util.List;
/**
* <p>
* 前端控制器
* </p>
*
* @author gongxl
* @since 2021-05-11
*/
@Controller
@RequestMapping
public class UploadController {
@Value("${user.file.path}")
private String filePath;
/**
* @Author GongXl
* @Description
* @Date 2021/5/20 14:44
* @Param [model]
* @return java.lang.String
**/
@RequestMapping("/toUpload")
public String toUpload(Model model) {
return "upload";
}
/**
* @Author GongXl
* @Description 单文件上传
* @Date 2021/5/20 14:47
* @Param [file, model]
* @return java.lang.String
**/
@PostMapping("/uploadFile")
public String upload(@RequestParam("file") MultipartFile file, Model model){
if (file.isEmpty()){
model.addAttribute("message", "The file is empty!");
return "upload";
}
try{
byte[] bytes = file.getBytes();
Path path = Paths.get(filePath + file.getOriginalFilename());
Files.write(path, bytes);
model.addAttribute("message", "succes");
}catch (Exception e){
e.printStackTrace();
}
return "upload";
}
/**
* 多文件上传
* @param request
* @param model
* @return
*/
@PostMapping("/multiUpload")
public String multiUpload(HttpServletRequest request, Model model) {
List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("file");
File fileTemp = new File(filePath);
//判断文件父目录是否存在
if(!fileTemp.exists()){
//不存在就创建一个
fileTemp.mkdirs();
}
for (int i = 0; i < files.size(); i++) {
MultipartFile file = files.get(i);
if (file.isEmpty()) {
model.addAttribute("message", "上传第"+i+"个文件失败。");
}
String fileName = file.getOriginalFilename();
File dest = new File(filePath + fileName);
try {
file.transferTo(dest);
System.out.println(dest.getAbsolutePath());
model.addAttribute("message", "succes");
model.addAttribute("filePath","/"+fileName);
} catch (IOException e) {
model.addAttribute("message", "上传异常");
}
}
return "upload";
}
/**
* 下载文件
* @param fileName
* @throws IOException
*/
@RequestMapping(value = "/download/{fileName:.+}")
public void download(@PathVariable String fileName) throws IOException {
ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletResponse response = requestAttributes.getResponse();
// 设置信息给客户端不解析
String type = fileName.substring(fileName.lastIndexOf(".")+1);
// 设置contenttype，即告诉客户端所发送的数据属于什么类型
response.setHeader("Content-type",type);
// 设置编码
String hehe = new String(fileName.getBytes("utf-8"), "iso-8859-1");
// 设置扩展头，当Content-Type 的类型为要下载的类型时 , 这个信息头会告诉浏览器这个文件的名字和类型。
response.setHeader("Content-Disposition", "attachment;filename=" + hehe);
FileUtil.download(fileName, response);
}
}<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.4.5</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>springboot_jxc_0511</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot_jxc_0511</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.2</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-generator</artifactId> <version>3.4.1</version> </dependency> <dependency> <groupId>org.apache.velocity</groupId> <artifactId>velocity-engine-core</artifactId> <version>2.3</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- https://mvnrepository.com/artifact/org.webjars/webjars-locator --> <dependency> <groupId>org.webjars</groupId> <artifactId>webjars-locator</artifactId> <version>0.40</version> </dependency> <!-- https://mvnrepository.com/artifact/org.webjars.bower/jquery --> <dependency> <groupId>org.webjars.bower</groupId> <artifactId>jquery</artifactId> <version>3.6.0</version> </dependency> <!-- https://mvnrepository.com/artifact/org.webjars/bootstrap --> <dependency> <groupId>org.webjars</groupId> <artifactId>bootstrap</artifactId> <version>5.0.0</version> </dependency> <!-- https://mvnrepository.com/artifact/org.webjars/layui --> <dependency> <groupId>org.webjars</groupId> <artifactId>layui</artifactId> <version>2.5.7</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>
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