LayUIコンポーネントjavaベースのファイルアップロード

	<dependency>
	    <groupId>commons-fileuploadgroupId>
	    <artifactId>commons-fileuploadartifactId>
	dependency>

        

layui.use('upload', function(){
       
    var upload = layui.upload;
    //  Excel  
	var uploadInst=upload.render({
       
	    elem: '#uploadfile', //    
	    url: projectName+'/hardware/uploadfile.do', //    
	    method:'POST',
	    accept: 'file', //         
	    size: 204800, //              ，   KB
	    done: function(res){
        //      
	    	console.log(res)
	    	layer.msg("    ",{
       icon: 1});
	        parent.location.reload();
	    },

	    error: function(){
       
	      //      
	    	layer.msg("    ",{
       icon: 0});
	    }
	  });
}）

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
	    
	    <property name="maxUploadSizePerFile" value="5242880"/>
	    <property name="defaultEncoding" value="UTF-8"/>
	    <property name="resolveLazily" value="true"/>
bean>

/**
	 *   Excel  
	 * @throws IOException 
	 * @throws IllegalStateException 
	 */
@RequestMapping("/uploadfile.do")
@ResponseBody
public Map<String,String> uploadfile(@RequestParam("file") MultipartFile file,HttpServletRequest request) 
    throws IllegalStateException, IOException{
       
    if(null!=file){
       
        String fileOrigName=file.getOriginalFilename();//      
        if (!fileOrigName.contains(".")) {
       
            throw new IllegalArgumentException("     ");
        }
        //     
        fileOrigName = fileOrigName.substring(fileOrigName.lastIndexOf("."));
        String newfileName =CommonFunction.strAutoInfo() +fileOrigName;
        //            D:\apache-tomcat-8.0.53\webapps\QrCode\
        String uploadPath=request.getServletContext().getRealPath("");
        //     QrCode
        String projectName=request.getServletContext().getContextPath().substring(1);
        //             D:\apache-tomcat-8.0.53\webapps/uploadfile\
        String newdestPath= uploadPath.replaceAll(projectName, "uploadfile")+newfileName;
        //             
        File newfile=new File(newdestPath);
        if(!newfile.exists() && !newfile.isDirectory()){
       
            System.out.println(newfile+"     ，    ");
            //    
            newfile.mkdirs();
        }
        file.transferTo(newfile);
    }
    Map<String,String> map=new HashMap<String,String>();
    map.put("code", "0");
    map.put("msg","    ");
    return map;	
}