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import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class DateCompareDemo {
//得到以后的日期
public Date dateCompare(String str, int month,int day) throws ParseException {
Date date = null;
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd" );
date = df.parse(str);
Calendar c = Calendar. getInstance();
c.setTime(date);
c.add(Calendar. MONTH, month);
c.add(Calendar. DAY_OF_MONTH, day);
return c.getTime();
}
public static void main(String[] args) throws ParseException {
DateCompareDemo dcd = new DateCompareDemo();
String A = "2010-01-01";
Date B = dcd.dateCompare( "2010-05-03", 0, 0);
Date A1 = dcd.dateCompare(A, 3, 0); //得到A三个月以后的日期
Date A2 = dcd.dateCompare(A, 0, 5); //得到A五天后的日期
int result1 = A1.compareTo(B);
int result2 = A2.compareTo(B);
if(result1 < 0) {
System. out.println("A三个月以后的日期比B小" );
} else {
System. out.println("A三个月以后的日期比B大" );
}
if(result2 <0) {
System. out.println("A五天后的日期比B小" );
} else {
System. out.println("A五天后的日期比B大" );
}
}
}