1。spring日期類型要寫自己的方法覆蓋原有的綁定類型
例如生日域的綁定
 protected void initBinder(HttpServletRequest arg0, ServletRequestDataBinder arg1) throws Exception {
  arg1.registerCustomEditor(Date.class,"birthday",getCustomDateEditor());
  super.initBinder(arg0, arg1);
 }

2.trim
The string without leading and trailing white-space. Example: (${"  green mouse  "?trim})  
The output: (green mouse)  
  3.split
  
 <#list "someMOOtestMOOtext"?split("MOO") as x>
- ${x}
</#list>   
willprint :
- some
- test
- text