Java SQL Date getDayOfPerMonth(String theDataStr)

Description

get Day Of Per Month

License

Open Source License

Declaration

public static Date getDayOfPerMonth(String theDataStr) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class Main {
    private static final int[] DAY_OF_MONTH = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

    public static Date getDayOfPerMonth(String theDataStr) {
        Date theDate = java.sql.Date.valueOf(theDataStr);
        Calendar c = new GregorianCalendar();
        c.setTime(theDate);/*from w  w w. j a  v a  2s . c  om*/
        int day = c.get(Calendar.DAY_OF_MONTH);
        if (day <= 10) {
            c.set(Calendar.DAY_OF_MONTH, 1);
        } else if (day > 10 && day <= 20) {
            c.set(Calendar.DAY_OF_MONTH, 11);
        } else {
            c.set(Calendar.DAY_OF_MONTH, 21);
        }
        c.add(Calendar.DAY_OF_MONTH, -1);

        return new Date(c.getTime().getTime());
    }

    public static int get(Date date, int type) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        return calendar.get(type);
    }

    public static String getTime(Date dt, String format) {
        SimpleDateFormat st = new SimpleDateFormat(format);
        return st.format(dt);
    }
}

Related

1. convertTo(Class clazz, Object obj)
2. convertTo(final Class> clazz, Object obj)
3. getClasses()
4. getCurrDay()
5. getCurrentYear()
6. getDiffDays(String begin_dt, String end_dt)
7. getEndWeekDayOfMonth(String year, String month)
8. getFileName()
9. getFirstDayOfNextMonth()