SpringBoot中怎么实现图片上传
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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; 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(filePath); 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
@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
@Override public MapfileUpload(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; @Component @ConfigurationProperties(prefix="preread") public class PreReadUploadConfig { //上传路径 private String uploadPath; public String getUploadPath() { return uploadPath; } public 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; @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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