一、创建一个简单的包含WEB依赖的SpringBoot项目 pom.xml 内容: !-- Spring Boot web启动器 --dependency groupIdorg.springframework.boot/groupId artifactIdspring-boot-starter-web/artifactId/dependency!-- jsp --dependency gr
一、创建一个简单的包含WEB依赖的SpringBoot项目
pom.xml
内容:
<!-- Spring Boot web启动器 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- jsp --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> </dependency> <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> <!--<scope>provided</scope>--> </dependency>
二、配置文件上传的文件大小限制
application.properties
配置文件添加:
# 上传文件总的最大值 spring.servlet.multipart.max-request-size=10MB # 单个文件的最大值 spring.servlet.multipart.max-file-size=10MB ## jsp spring.mvc.view.prefix=/WEB-INF/jsp/ spring.mvc.view.suffix=.jsp
spring.servlet.multipart.max-file-size
限制单个文件的最大值spring.servlet.multipart.max-request-size
限制上传的多个文件的总大小
三、单文件上传示例
1、创建Controller控制类,内容如下:
package com.songguoliang.springboot.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping; 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; import javax.servlet.http.HttpServletRequest; import java.io.File; import java.io.IOException; import java.util.List; /** * @Description * @Author sgl * @Date 2018-05-15 14:04 */ @Controller public class UploadController { private static final Logger LOGGER = LoggerFactory.getLogger(UploadController.class); @GetMapping("/upload") public String upload() { return "upload"; } @PostMapping("/upload") @ResponseBody public String upload(@RequestParam("file") MultipartFile file) { if (file.isEmpty()) { return "上传失败,请选择文件"; } String fileName = file.getOriginalFilename(); String filePath = "/Users/itinypocket/workspace/temp/"; File dest = new File(filePath + fileName); try { file.transferTo(dest); LOGGER.info("上传成功"); return "上传成功"; } catch (IOException e) { LOGGER.error(e.toString(), e); } return "上传失败!"; } }
2、创建upload.jsp
文件
只有一个表单,选择文件,form的enctype
为multipart/form-data
:
<%@ page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-type" content="text/html; charset=UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/> <title>单文件上传</title> </head> <body> <form method="post" action="/upload" enctype="multipart/form-data"> <input type="file" name="file"><br> <input type="submit" value="提交"> </form> </body> </html>
3、通过springboot插件启动项目,浏览器输入http://localhost:8080/upload
:
选择文件点击提交按钮返回成功信息,我们上传的文件保存在/Users/itinypocket/workspace/temp
路径下:
四、多文件上传
1、创建多文件上传的jsp页面,多文件上传页面只是比单文件上传多了file选择的input而已,multiUpload.jsp
内容如下:
<%@ page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-type" content="text/html; charset=UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/> <title>多文件上传</title> </head> <body> <form method="post" action="/multiUpload" enctype="multipart/form-data"> <input type="file" name="file"><br> <input type="file" name="file"><br> <input type="file" name="file"><br> <input type="submit" value="提交"> </form> </body> </html>
2、在UploadController
里添加多文件上传的方法
@GetMapping("/multiUpload") public String multiUpload() { return "multiUpload"; } @PostMapping("/multiUpload") @ResponseBody public String multiUpload(HttpServletRequest request) { List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("file"); String filePath = "/Users/itinypocket/workspace/temp/"; for (int i = 0; i < files.size(); i++) { MultipartFile file = files.get(i); if (file.isEmpty()) { return "上传第" + (i++) + "个文件失败"; } String fileName = file.getOriginalFilename(); File dest = new File(filePath + fileName); try { file.transferTo(dest); LOGGER.info("第" + (i + 1) + "个文件上传成功"); } catch (IOException e) { LOGGER.error(e.toString(), e); return "上传第" + (i++) + "个文件失败"; } } return "上传成功"; }
3、重启服务,浏览器输入http://localhost:8080/multiUpload
:
4、然后选择要上传的文件,点击提交按钮,得到成功信息:
我们选择的三个文件已被成功上传到/Users/itinypocket/workspace/temp
路径下。
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