一、创建一个简单的包含WEB依赖的SpringBoot项目
pom.xml
内容:
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<!-- 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>
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二、配置文件上传的文件大小限制
application.properties
配置文件添加:
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# 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
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-
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:
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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!" ;
}
}
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2、创建upload.jsp
文件
只有一个表单,选择文件,form的enctype
为multipart/form-data
:
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<%@ 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 >
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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:
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<%@ 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 >
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2、在UploadController
里添加多文件上传的方法
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@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" ;
}
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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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原文链接:https://blog.csdn.net/gnail_oug/article/details/80324120