springMVC实现文件上传

最新推荐文章于 2025-04-24 16:03:33 发布

坏小福

最新推荐文章于 2025-04-24 16:03:33 发布

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分类专栏：文件上传

本文链接：https://blog.youkuaiyun.com/sharpcool/article/details/51764849

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本文介绍了一个基于Spring MVC的图片上传控制器的设计与实现，包括文件类型验证、文件保存、URL生成及图片内容验证等关键步骤。

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配置：

REPOSITORY_PATH=E:\\0524\\upload
IMAGE_BASE_URL=http://image.static.com
TAOTAO_WEB_URL=http://www.static.com
TAOTAO_SEARCH_URL=http://search.static.com

pom

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>store.antnest.demo</groupId>
		<artifactId>demo</artifactId>
		<version>1.0.0-SNAPSHOT</version>
	</parent>
	<artifactId>demo-web</artifactId>
	<packaging>war</packaging>
	<dependencies>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
		</dependency>
		<!-- MySql -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<!-- Jackson Json处理工具包 -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
		</dependency>
		<!-- 连接池 -->
		<dependency>
			<groupId>com.jolbox</groupId>
			<artifactId>bonecp-spring</artifactId>
		</dependency>
		<!-- JSP相关 -->
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jsp-api</artifactId>
			<scope>provided</scope>
		</dependency>
		<!-- 文件上传组件 -->
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.3.1</version>
		</dependency>
		<!-- 时间操作组件 -->
		<dependency>
			<groupId>joda-time</groupId>
			<artifactId>joda-time</artifactId>
		</dependency>

	</dependencies>
</project>

spring配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
	
	
	<!-- 注解驱动 -->
	<mvc:annotation-driven>
		<mvc:message-converters register-defaults="true">
			<bean class="org.springframework.http.converter.StringHttpMessageConverter">
				<constructor-arg index="0" value="UTF-8"></constructor-arg><!-- 向构造函数中第几个参数传值 -->
			</bean>
			<bean class="com.taotao.common.spring.extend.messageconvertor.json.CallbackMappingJackson2HttpMessageConverter">
				<property name="callbackName" value="callback"> </property>
			</bean>
		</mvc:message-converters>
	</mvc:annotation-driven>
	
	<!-- 扫描Controller,尽可能配置到指定的路径 -->
	<context:component-scan base-package="com.taotao.manage.controller"/>
	
	<!--视图解析器  -->
	<!--
		prefix="/WEB-INF/jsp/", suffix=".jsp", viewname="test" -> "/WEB-INF/jsp/test.jsp" 
	  -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/views/"></property>
		<property name="suffix" value=".jsp"></property>
		<property name="order" value="2"></property>
	</bean>
	<!-- 过滤掉所有的静态资源，把静态资源交给服务器，spirngmvc自己不处理 -->
	<mvc:default-servlet-handler/>
	
	<!-- 要求id必须是 multipartResolver -->
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<!-- 设定默认编码 -->
		<property name="defaultEncoding" value="UTF-8"></property>
		<!-- 设定文件上传的最大值5MB，5*1024*1024,如果一次性上传多个文件，则只的时候所有文件的总和 -->
		<property name="maxUploadSize" value="5242880"></property>
	</bean>
</beans>

代码实现：

package store.antnest.controller;


import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Date;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.RandomUtils;
import org.apache.commons.lang3.StringUtils;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.fasterxml.jackson.databind.ObjectMapper;



/**
 * 图片上传
 */
@Controller
@RequestMapping("/pic")
public class PicUploadController {

	
	
	
	private static final Logger LOGGER = LoggerFactory.getLogger(PicUploadController.class);

	@Autowired
	private PropertieService propertieService;
	
	//jackson 中的json处理工具
	private static final ObjectMapper mapper = new ObjectMapper();

	// 允许上传的格式
	private static final String[] IMAGE_TYPE = new String[] { ".bmp", ".jpg", ".jpeg", ".gif", ".png" };

	/**
	 * 1、校验图片的后缀名
	 * 2、把图片保存到指定的路径
	 * 3、获取要访问的路径
	 * 4、继续判断上传的内容是否是图片，通过获取文件中的宽度和高度
	 * 5、返回处理结果。
	 * @param uploadFile
	 * @param response
	 * @return
	 * @throws Exception
	 */
	@RequestMapping(value = "/upload", method = RequestMethod.POST , produces=MediaType.TEXT_HTML_VALUE)
	@ResponseBody
	public String upload(@RequestParam("uploadFile") MultipartFile uploadFile , HttpServletResponse response) throws Exception {

		// 校验图片格式
		boolean isLegal = false;
		for (String type : IMAGE_TYPE) {
			if (StringUtils.endsWithIgnoreCase(uploadFile.getOriginalFilename(), type)) {
				isLegal = true;
				break;
			}
		}

		// 封装Result对象，
		PicUploadResult fileUploadResult = new PicUploadResult();

		// 状态
		fileUploadResult.setError(isLegal ? 0 : 1);

		// 文件新路径
		String filePath = getFilePath(uploadFile.getOriginalFilename());

		if (LOGGER.isDebugEnabled()) {
			LOGGER.debug("Pic file upload .[{}] to [{}] .", uploadFile.getOriginalFilename(), filePath);
		}

		// 生成图片的绝对引用地址propertieService.REPOSITORY_PATH
		String picUrl = StringUtils.replace(StringUtils.substringAfter(filePath, propertieService.REPOSITORY_PATH), "\\", "/");
		//propertieService.IMAGE_BASE_URL 设置上传之后的访问路径
		fileUploadResult.setUrl( propertieService.IMAGE_BASE_URL + picUrl);

		File newFile = new File(filePath);

		// 写文件到磁盘
		uploadFile.transferTo(newFile);

		// 校验图片是否合法
		isLegal = false;
		try {
			BufferedImage image = ImageIO.read(newFile);
			if (image != null) {
				fileUploadResult.setWidth(image.getWidth() + "");
				fileUploadResult.setHeight(image.getHeight() + "");
				isLegal = true;
			}
		} catch (IOException e) {
		}

		// 状态
		fileUploadResult.setError(isLegal ? 0 : 1);

		if (!isLegal) {
			// 不合法，将磁盘上的文件删除
			newFile.delete();
		}

		//response.setContentType(MediaType.TEXT_HTML_VALUE);
		//返回的是json格式的字符串
		return mapper.writeValueAsString(fileUploadResult);
	}

	private String getFilePath(String sourceFileName) {
		String baseFolder = propertieService.REPOSITORY_PATH + File.separator + "images";
		Date nowDate = new Date();
		// yyyy/MM/dd
		String fileFolder = baseFolder + File.separator + new DateTime(nowDate).toString("yyyy") + File.separator + new DateTime(nowDate).toString("MM") + File.separator
				+ new DateTime(nowDate).toString("dd");
		File file = new File(fileFolder);
		if (!file.isDirectory()) {
			// 如果目录不存在，则创建目录
			file.mkdirs();
		}
		// 生成新的文件名
		String fileName = new DateTime(nowDate).toString("yyyyMMddhhmmssSSSS") + RandomUtils.nextInt(100, 9999) + "." + StringUtils.substringAfterLast(sourceFileName, ".");
		return fileFolder + File.separator + fileName;
	}

}