基于LayUi组件java上传文件

基于LayUi组件java上传文件

• Maven导包

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

• jsp页面

  
      上传文件
  
  

• js页面

  layui.use('upload', function(){
         
      var upload = layui.upload;
      //上传Excel文件
  	var uploadInst=upload.render({
         
  	    elem: '#uploadfile', //绑定元素
  	    url: projectName+'/hardware/uploadfile.do', //上传接口
  	    method:'POST',
  	    accept: 'file', //允许上传的文件类型
  	    size: 204800, //设置文件最大可允许上传的大小，单位 KB
  	    done: function(res){
          //上传完毕回调
  	    	console.log(res)
  	    	layer.msg("上传成功",{
         icon: 1});
  	        parent.location.reload();
  	    },
  
  	    error: function(){
         
  	      //请求异常回调
  	    	layer.msg("上传失败",{
         icon: 0});
  	    }
  	  });
  }）
  

• 配置SpringMVC上传

  <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>
  

• java后台

  /**
  	 * 上传Excel文档
  	 * @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();// 文件原名称
          if (!fileOrigName.contains(".")) {
         
              throw new IllegalArgumentException("缺少后缀名");
          }
          //获取后缀名
          fileOrigName = fileOrigName.substring(fileOrigName.lastIndexOf("."));
          String newfileName =CommonFunction.strAutoInfo() +fileOrigName;
          //得到上传文件的保存目录 D:\apache-tomcat-8.0.53\webapps\QrCode\
          String uploadPath=request.getServletContext().getRealPath("");
          //获取项目名QrCode
          String projectName=request.getServletContext().getContextPath().substring(1);
          //将上传文件的保存目录换成 D:\apache-tomcat-8.0.53\webapps/uploadfile\
          String newdestPath= uploadPath.replaceAll(projectName, "uploadfile")+newfileName;
          //判断上传文件的目录是否存在
          File newfile=new File(newdestPath);
          if(!newfile.exists() && !newfile.isDirectory()){
         
              System.out.println(newfile+"目录不存在，需要创建");
              //创建目录
              newfile.mkdirs();
          }
          file.transferTo(newfile);
      }
      Map<String,String> map=new HashMap<String,String>();
      map.put("code", "0");
      map.put("msg","上传成功");
      return map;	
  }