前言
针对thymeleaf对文件上传的方法进行总结，有不到之处敬请指正！
1.pom.xml依赖的编写
<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>
2.application.yml配置文件的编写
# 端口
server:
port: 8014
spring:
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
3.templates下上传页面的编写
<!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/>
4.文件上传控制器的编写
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;
@RestController
public 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" ;
}
}