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约定不等于承诺〃 2022-07-12 02:19 248阅读 0赞

1.div部分

2.后台处理

@ResponseBody
    	@RequestMapping(value = "uploadx")  
    	public ActionResult uploadx(@RequestParam("cate") String category, @RequestParam("file[]") MultipartFile file, HttpServletRequest request, ModelMap model) {  
    		  
    		//保存  
    		try { 
    			String fileName = this.fileService.getFilePath(category, file.getOriginalFilename());
    			String path = this.fileService.resolveToPhysicalFileName(fileName);
    			File targetFile = new File(path);  
    			if(!targetFile.exists()){  
    				targetFile.mkdirs();  
    			}  
    			file.transferTo(targetFile);
    			return ActionResult.Succeed(fileName);
    		} catch (Exception e) {  
    			logger.warn("", e);
    			return ActionResult.Failed(e);
    		}  		
    	}

3.service

package com.eznext.modul.file.service;
    
    import java.io.File;
    import java.math.BigDecimal;
    import java.sql.Date;
    import java.util.Map;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.stereotype.Service;
    
    import com.eznext.core.util.MD5;
    import com.eznext.core.web.BusinessException;
    
    @Service
    public class FileService {
    	 private static Logger logger = LoggerFactory
    				.getLogger(FileService.class);
    	 
    	 private Map<String, String> categories;
    	 
    	 
    	 public String getFilePath(String category, String filename) throws BusinessException{
    		int index = filename.lastIndexOf(".");
    		 if(index < 0){
    			 throw new BusinessException("无效的文件名!");
    		 }
    		 String cateId = String.format("%s.name", category.toLowerCase());
    		 String name = categories.get(cateId);
    		 if(name == null)
    		 {
    			 throw new BusinessException("无效的属性名!");
    		 }
    		 return name + "_" + uniqueName(filename.substring(0, index)) + "." + filename.substring(index + 1);
    	 }
    	 
    	 public String resolveToPhysicalFileName(String filename) throws BusinessException{
    		 int index = filename.indexOf("_");
    		 if(index < 0){
    			 throw new BusinessException("无效的文件名!");
    		 }
    		 String path = categories.get(String.format("%s.path", filename.subSequence(0, index)));
    		 if(path == null)
    		 {
    			 throw new BusinessException("无效的属性名!");
    		 }
    		 return path + "/" + filename.substring(index + 1);
    	 }
    	 
    	 public void deleteFile(String filename) throws BusinessException{
    		 	String physicalFilename = this.resolveToPhysicalFileName(filename);
    			File file = new File(physicalFilename);
    			if(file.exists() && file.isFile()){
    				file.delete();
    			}
    	 }
    	 
    	 public Map<String, String> getCategories() {
    		return categories;
    	}
    
    	public void setCategories(Map<String, String> categories) {
    		this.categories = categories;
    	}
    
    	private String uniqueName(String name){
    		BigDecimal vv = new BigDecimal(System.currentTimeMillis());		
    		return MD5.getMd5String(name + vv.toPlainString());
    	 }
    }

4.配置文件