针对thymeleaf对文件上传的方法进行总结，有不到之处敬请指正！
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</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-log4j2</artifactId> <version>2.6.3</version> </dependency> </dependencies># 端口server: port: 8014spring: application: # 应用名称 name: node14-boot-file servlet: multipart: # 启用 enabled: true # 上传文件单个限制 max-file-size: 5MB # 总限制 max-request-size: 6MB thymeleaf: cache: false # 开发时关闭缓存,不然没法看到实时页面 prefix: classpath: /templates # 访问template下的html文件需要配置模板，映射<!DOCTYPE html><html xmlns:th="http://www.thymeleaf.org"><body><hr/><h3>1、单文件上传</h3><form method="POST" action="/upload1" enctype="multipart/form-data"> 上传人：<input type="text" name="userName" /><br/> 文件一：<input type="file" name="file" /><br/> <input type="submit" value="Submit" /></form><hr/><h3>2、多文件上传</h3><form method="POST" action="/upload2" enctype="multipart/form-data"> 上传人：<input type="text" name="userName" /><br/> 文件一：<input type="file" name="file" /><br/> 文件二：<input type="file" name="file" /><br/><br/> <input type="submit" value="Submit" /></form></body></html><hr/>import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.multipart.MultipartFile;import javax.servlet.http.HttpServletRequest;import java.io.File;import java.util.Map;@RestControllerpublic class FileController { private static final Logger LOGGER = LoggerFactory.getLogger(FileController.class) ; /** * 如果单个文件大小超出1MB，抛出异常 * FileSizeLimitExceededException: * The field file exceeds its maximum permitted size of 1048576 bytes. */ @RequestMapping("/upload1") public String upload1 (HttpServletRequest request, @RequestParam("file") MultipartFile file){ Map<String, String[]> paramMap = request.getParameterMap() ; if (!paramMap.isEmpty()){ LOGGER.info("paramMap == >>{}",paramMap); } try{ if (!file.isEmpty()){ // 打印文件基础信息 LOGGER.info("Name == >>{}",file.getName()); LOGGER.info("OriginalFilename == >>{}",file.getOriginalFilename()); LOGGER.info("ContentType == >>{}",file.getContentType()); LOGGER.info("Size == >>{}",file.getSize()); // 文件输出地址 String filePath = "D:\\boot-file\\" ; new File(filePath).mkdirs(); File writeFile = new File(filePath, file.getOriginalFilename()); file.transferTo(writeFile); } return "success" ; } catch (Exception e){ e.printStackTrace(); return "系统异常" ; } } /** * 如果上传文件总大小超过6MB，抛出异常 * SizeLimitExceededException: * the request was rejected because its size (9052616) exceeds the configured maximum (6291456) */ @RequestMapping("/upload2") public String upload2 (HttpServletRequest request, @RequestParam("file") MultipartFile[] fileList){ Map<String, String[]> paramMap = request.getParameterMap() ; if (!paramMap.isEmpty()){ LOGGER.info("paramMap == >>{}",paramMap); } try{ if (fileList.length > 0){ for (MultipartFile file:fileList){ // 打印文件基础信息 LOGGER.info("Name == >>{}",file.getName()); LOGGER.info("OriginalFilename == >>{}",file.getOriginalFilename()); LOGGER.info("ContentType == >>{}",file.getContentType()); LOGGER.info("Size == >>{}",file.getSize()); // 文件输出地址 String filePath = "D:\\boot-file\\" ; new File(filePath).mkdirs(); File writeFile = new File(filePath, file.getOriginalFilename()); file.transferTo(writeFile); } } return "success" ; } catch (Exception e){ return "fail" ; } }