Calendar的时间设定分开成year,month,date等

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/priceBacks.do?method=Parentpayfeeviewall&fromflag=left //传入的方法后定义了一个临时的属性=left
String fromflag=request.getParameter("fromflag");
if("left".equals(fromflag)){
this.removeActionFormFromScope(request,mapping); //清空request
parentpayfeeForm.clear();     //清空Form
Calendar c=Calendar.getInstance();    //Calendar是抽象类，用里面的方法getInstance()，得到实例化，相当于普通类的new得到实例化
c.setTime(new Date());      //设定时间
String year=c.get(c.YEAR)+"";     //得到时间并且转型成String类型
}

//清楚request的方法
protected void removeActionFormFromScope(HttpServletRequest request,ActionMapping mapping){
if("request".equals(mapping.getScope())){
request.removeAttribute(mapping.getAttribute());
}else if{
request.getSession().removeAttribute(mapping.getAttribute());
}
}

//Form里的清零方法
public void clear(){
this.id=null;
this.month=null;
this.parentid=null;
this.parentname=null;
this.banknumber=null;
this.nowmonthpayfee=null;
this.nopayfee=null;
this.changefee=null;
this.nextmonthpayfee=null;
this.nowpayfee=null;
this.paystate=null;
this.remark=null;
}