首先封装一个Map,当Map可以一键多值
public class ArrayMap {
 
  private HashMap<String, List<String>> map = null ; 
 
  private static final long serialVersionUID = 7760971972716111286L;
 
  public ArrayMap(){
    map = new HashMap<String, List<String>>();
  }
 
  public List<String> put(String key, List<String> arg1) {
    return map.put(key, arg1);
  }
 
  public List<String> put(String key, String value) {
    List<String>values=map.get(key);
    if(values == null){
      values = new Vector<String>();
    }
    values.add( value );
    return map.put(key, values ) ;
  }
 
  public String getItem(String key){
    List<String>values=map.get(key);
    if(Helper.isEmpty(values)){
      return null;
    }
    return values.get(0) ;
  }
 
  public List<String> getItems(String key){
    return map.get(key) ;
  }
}

然后每次请求后调用次方法。
public ArrayMap upload(HttpServletRequest request){
    ArrayMap map = new ArrayMap();
    ServletRequestContext requestContext = new ServletRequestContext(request);
    boolean isMultipart = ServletFileUpload.isMultipartContent( requestContext ) ; 
    if(isMultipart){
      try{
       String basePath = "../goodImg/" + DateFormatUtils.format(Calendar.getInstance() , "yyyyMM") + "/" ;
       FileItemFactory factory = new DiskFileItemFactory();
       ServletFileUpload upload = new ServletFileUpload(factory);
       List<?> fileItems = upload.parseRequest(request);
       for(Object item : fileItems){
         FileItem fileItem = (FileItem) item ;
         if(fileItem.isFormField()){
           map.put( fileItem.getFieldName() , new String(TransformUtils.toString(fileItem.getString()).getBytes("ISO-8859-1") , "GBK") );
         }else{
           String filePath = request.getSession().getServletContext().getRealPath("/") ;
           String uploadName = TransformUtils.toString(fileItem.getName());
          
           if(!Helper.isEmpty(uploadName)){
             int index = uploadName.lastIndexOf(".") ;
             String ext = ".jpg" ;
             if(index != -1){
               ext = uploadName.substring( index ) ;
             }
            
             String fileName = basePath+TransformUtils.toString(System.currentTimeMillis()) + ext ;
            
             java.io.File file = new java.io.File(filePath + fileName);
             file.getParentFile().mkdirs() ;
            
             FileUtil.write( fileItem.getInputStream() , new FileOutputStream( file )) ;
            
             map.put( fileItem.getFieldName() , fileName );
           }
         }
       }
      }catch(Exception e){
        e.printStackTrace() ;
      }
    }else{
      Enumeration<?> enumeration = request.getParameterNames();
      while(enumeration.hasMoreElements()){
        String name = TransformUtils.toString(enumeration.nextElement());
        String[]values = request.getParameterValues( name ) ;
        if(null != values){
          for(String value : values ){
            map.put(name , value ) ;
          }
        }
      }
    }
    return map;
  }

这样不管是什么样的请求都能够访问获取到数据，当然次方法仅限于自己封装MVC框架的网站。并不适用于已经实现该功能的网站。