springboot上传文件(存入服务器,并将URL存入数据库表中)

素颜马尾好姑娘i 2023-10-17 16:28 9阅读 0赞

public R upLoadAccessory(@RequestParam("file")MultipartFile file){
    		
    		Map<String,Object> map = new HashMap<>();
    		
    		if (file.isEmpty()) {
    			return R.ok(map);
    			
    		}else {
    			
    			//保存时的文件名
    			DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss"); 
    			Calendar calendar = Calendar.getInstance(); 
    			String dateName = df.format(calendar.getTime())+file.getOriginalFilename();
    			
    			System.out.println(dateName);
    			//保存文件的绝对路径
    			WebApplicationContext webApplicationContext = (WebApplicationContext)SpringContextUtils.applicationContext; 
    			ServletContext servletContext = webApplicationContext.getServletContext();
    			String realPath = servletContext.getRealPath("/");
    			String filePath = realPath + "WEB-INF"+File.separator + "classes" + File.separator +"static" + File.separator + "resource" + File.separator+dateName;
    			System.out.println("绝对路径:"+filePath);
    			
    			File newFile = new File(filePath);
    			
    			//MultipartFile的方法直接写文件
    			try {
    				
    				//上传文件
    				file.transferTo(newFile);
    				
    				//数据库存储的相对路径
    				String projectPath = servletContext.getContextPath();
    				HttpServletRequest request = HttpContextUtils.getHttpServletRequest();
    				String contextpath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+projectPath;
    				String url = contextpath + "/resource/"+dateName;
    				System.out.println("相对路径:"+url);
    				//文件名与文件URL存入数据库表
    				....
    				
    				
    			} catch (IllegalStateException | IOException e) {
    				e.printStackTrace();
    			}
    			
    		}
    		return R.ok(map);
    	}

2018.5.16 更新: 补充一下工具类

@Component
    public class SpringContextUtils implements ApplicationContextAware {
    	public static ApplicationContext applicationContext; 
    
    	@Override
    	public void setApplicationContext(ApplicationContext applicationContext)
    			throws BeansException {
    		SpringContextUtils.applicationContext = applicationContext;
    	}
    
    	public static Object getBean(String name) {
    		return applicationContext.getBean(name);
    	}
    
    	public static <T> T getBean(String name, Class<T> requiredType) {
    		return applicationContext.getBean(name, requiredType);
    	}
    
    	public static boolean containsBean(String name) {
    		return applicationContext.containsBean(name);
    	}
    
    	public static boolean isSingleton(String name) {
    		return applicationContext.isSingleton(name);
    	}
    
    	public static Class<? extends Object> getType(String name) {
    		return applicationContext.getType(name);
    	}
    
    }

**2019.8.6更新**— HttpContextUtils 工具类

import org.springframework.web.context.request.RequestContextHolder;
    import org.springframework.web.context.request.ServletRequestAttributes;
    
    import javax.servlet.http.HttpServletRequest;
    
    public class HttpContextUtils {
    
    	public static HttpServletRequest getHttpServletRequest() {
    		return ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
    	}
    }