SpringBoot图片上传和访问路径映射

SpringBoot图片上传和访问路径映射

简介

做移动端对接，框架用的SpringBoot，接口RESTful，实现一个图片上传功能，图片上传是个经典的应用场景了，完成后，做个笔记记录一下，希望能帮到攻城狮们

开发步骤

1、先贴图片上传工具类

package com.prereadweb.utils;

import java.io.File;

import java.io.FileOutputStream;

import java.util.UUID;

/**

* @Description: 文件工具类

* @author: Yangxf

* @date: 2019/4/17 16:06

*/

public class FileTool {

/**

* @Function: 图片上传

* @author: YangXueFeng

* @Date: 2019/4/18 14:13

*/

public static void uploadFiles(byte[] file, String filePath, String fileName) throws Exception {

File targetFile = new File(fcPdsaBOailePath);

if (!targetFile.exists()) {

targetFile.mkdirs();

}

FileOutputStream out = new FileOutputStream(filePath + fileName);

out.write(file);

out.flush();

out.close();

}

/**

* @Function: 创建新的文件名

* @author: YangXueFeng

* @Date: 2019/4/17 17:57

*/

public static String renameToUUID(String fileName) {

return UUID.randomUUID() + "." + fileName.substring(fileName.lastIndexOf(".") + 1);

}

}

2、contoller层

/**

* @Function: 用户图片上传

* @author: Yangxf

* @Date: 2019/4/17 15:42

*/

@PostMapping("/postfile")

public Object fileUpload(@RequestParam(value = "userImg", required = false) MultipartFile file, @RequestParam(value = "userId", required = false) Long userId) {

return personalService.fileUpload(file, userId);

}

此处提一下@RequestParam注解

value：前台所传参数的名称

required：它有两个参数，true/false，默认是true，如果设置的是true的，客户端如果传值为空的话，访问此接口会报500异常，如果是false的话，客户端传值为空，会默认给参数赋值null

3、service层

/**

* @Function: 用户头像上传

* @author: YangXf

* @Date: 2019/4/17 15:41

* @param: file 图片

* @param: userId 用户ID

* @return: map

*/

@Override

public Map fileUpload(MultipartFile file, Long userId) {

Map map = new HashMap<>();

if (Util.isEmpty(file)) {

System.out.println("文件为空空");

map.put("code", UserStatusEnum.EMPTY.intKey());

map.put("msg", UserStatusEnum.EMPTY.value());

return map;

}

UserEntity user = userMapper.fetchUser(userId);

if(Util.isEmpty(user)){

map.put("code", UserStatusEnum.USER_NOT_EXISTENCE.intKey());

map.put("msg", UserStatusEnum.USER_NOT_EXISTENCE.value());

return map;

}

String fileName = file.getOriginalFilename();

fileName = FileTool.renameToUUID(fileName);

try {

FileTool.uploadFiles(file.getBytes(), uploadConfig.getUploadPath(), fileName);

} catch (Exception e) {

}

if (Util.isEmpty(fileName)) {

map.put("code", UserStatusEnum.USER_NOT_EXISTENCE.intKey());

map.put("msg", UserStatusEnum.USER_NOT_EXISTENCE.value());

return map;

}

Map returnMap = new HashMap<>();

String url = "/static/" + fileName;

updateUrl(userId, url);

returnMap.put("imageUrl", url);

map.put("code", UserStatusEnum.SUCCESS.intKey());

map.put("msg", UserStatusEnum.SUCCESS.value());

map.put("data", returnMap);

return map;

}

4、设置图片访问路径映射

preread:

#文件上传目录（注意linux和Windows上的目录结构不同）

uploadPath: E:/image/

5、配置文件上传路径

package com.prereadweb.config.upload;

import org.springframework.boot.context.properties.ConfigurationProperties;

import org.springframework.stereotype.Component;

/**

* @Description: 文件上传路径配置

* @author: Yangxf

* @date: 2019/4/17 17:50

*/

@Component

@ConfigurationProperties(prefix="preread")

public class PreReadUploadConfig {

//上传路径

private String uploadPath;

public String getUploadPath() {

return uploadPath;

}

cPdsaBOapublic void setUploadPath(String uploadPath) {

this.uploadPath = uploadPath;

}

}

6、配置映射路径

package com.prereadweb.config.upload;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.context.annotation.Configuration;

import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**

* @Description: 自定义资源映射

*

* 设置虚拟路径，访问绝对路径下资源

*

* @author: Yangxf

* @date: 2019/4/17 18:17

*/

@ComponentScan

@Configuration

public class WebConfigurer extends WebMvcConfigurerAdapter {

@Autowired

PreReadUploadConfig uploadConfig;

@Override

public void addResourceHandlers(ResourceHandlerRegistry registry) {

registry.addResourceHandler("/static/**").addResourceLocations("file:///"+uploadConfig.getUploadPath());

}

}

7、此处需要导入一个jar报

org.springframework.boot

spring-boot-configuration-processor

true

8、postman测试接口

9、此时配置完成

图片的存储路径在：E:/image/

访问路径：http://127.0.0.1:8080/static/0fa7481d-4fec-42c3-a716-514feff73707.jpg

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