JSP中日期相减的有关问题_Java Web开发

JSP中日期相减的问题
各位大侠,我想请问如何将两个日期相减呢?
<%
String inureTime="20070101000000";
java.text.SimpleDateFormat formatter = new java.text.SimpleDateFormat("yyyyMMddHHmmss");
java.util.Date currentTime = new java.util.Date();//得到当前系统时间
String str_date1 = formatter.format(currentTime);

>%
怎么求当前时间str_date1 和inureTime之间相差的天数呢?我该怎么写呢?谢谢各位了!

------解决方案--------------------

HTML code

public boolean getQuot(String time1) {    boolean bool = false;    long quot = 0;    SimpleDateFormat ft = new SimpleDateFormat("yyyy-MM-dd");    try {        Date date1 = ft.parse(time1);        Date date2 = new Date();        if(date1.getTime()<date2.getTime()){        quot =  date2.getTime()- date1.getTime();        quot = quot / 1000 / 60 / 60 / 24;        if(quot>0){            bool = false;        }else{            bool = true;        }        }else{            bool = false;        }    } catch (ParseException e) {        e.printStackTrace();    }    return bool;}
------解决方案--------------------
如果是要得到相差的天数只要要将一楼的quot =  date2.getTime()- date1.getTime();
改成quot =  parseInt(date2.getTime()- date1.getTime());
后面的不要了
------解决方案--------------------
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HTML code
public boolean getQuot(String time1) {
    boolean bool = false;
    long quot = 0;
    SimpleDateFormat ft = new SimpleDateFormat("yyyy-MM-dd");
    try {
        Date date1 = ft.parse(time1);
        Date date2 = new Date();
        if(date1.getTime()<date2.getTime()){
        quot =  date2.getTime()- date1.getTime();
        quot = quot / 1000 / 60 / 60 / 24;
        if(q…