Java如何得到指定时间段中的所有周，及每周的每一天都是周几和日期是多少？

import java.text.DateFormatSymbols;

import java.util.Calendar;

import java.util.GregorianCalendar;

public class Test {

/**

* @param args

*/

public static void main(String[] args){

Calendar c_begin = new GregorianCalendar();

Calendar c_end = new GregorianCalendar();

DateFormatSymbols dfs = new DateFormatSymbols();

String[] weeks = dfs.getWeekdays();

c_begin.set(2010, 3, 2); //Calendar的月从0-11，所以4月是3.

c_end.set(2010, 4, 20); //Calendar的月从0-11，所以5月是4.

int count = 1;

c_end.add(Calendar.DAY_OF_YEAR, 1); //结束日期下滚一天是为了包含最后一天

while(c_begin.before(c_end)){

System.out.println("第"+count+"周 日期："+new java.sql.Date(c_begin.getTime().getTime())+", "+weeks[c_begin.get(Calendar.DAY_OF_WEEK)]);

if(c_begin.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY){

count++;

}

c_begin.add(Calendar.DAY_OF_YEAR, 1);

}

}

}

1.使用java.util.Date类做：

import java.util.Date;

public class test {

public static void main(String[] args) {

Date dt = new Date();

int year = dt.getYear() + 1900; //getYear()返回的是1900年距今多少年,故如果想获取准确年份，必须加上1900

int month = dt.getMonth() + 1; //getMonth()返回的是0-11的数，故必须要加1

int week = dt.getDate();

int day = dt.getDay(); //getDay()返回的是0-6之间的数，所以后面要跟判断

String weekShow="";

if (day==0) {

weekShow="星期日";

}else if (day==1) {

weekShow="星期一";

}else if (day==2) {

weekShow="星期二";

}else if (day==3) {

weekShow="星期三";

}else if (day==4) {

weekShow="星期四";

}else if (day==5) {

weekShow="星期五";

}else if (day==6) {

weekShow="星期六";

}

System.out.println("今天是"+year+"年"+month+"月"+week+"日"+weekShow+"!");

}

}

2.使用java.util.Calendar类

import java.util.Calendar;

import java.util.Scanner;

public class test{

public static void main(String[] args) {

Calendar c = Calendar.getInstance();

int year = c.get(Calendar.YEAR);

int month =c.get(Calendar.MONTH) + 1; //Calendar.MONTH返回的是0-11的数，故必须要加1

int week = c.get(Calendar.DATE);

int day = c.get(Calendar.DAY_OF_WEEK);

String weekShow="";

if (day==0) {

weekShow="星期日";

}else if (day==1) {

weekShow="星期一";

}else if (day==2) {

weekShow="星期二";

}else if (day==3) {

weekShow="星期三";

}else if (day==4) {

weekShow="星期四";

}else if (day==5) {

weekShow="星期五";

}else if (day==6) {

weekShow="星期六";

}

System.out.println("今天是"+year+"年"+month+"月"+week+"日"+weekShow+"!");

}

}

public static void displayDayOfWeek(Date date){

Calendar c = Calendar.getInstance();

c.setTime(date);

int week_num =c.get(Calendar.WEEK_OF_YEAR);

System.out.print("是第"+week_num+"周");

int dayOfWeek = c.get(Calendar.DAY_OF_WEEK);

switch(dayOfWeek){

case 1:System.out.println("星期日!");break;

case 2:System.out.println("星期一!");break;

case 3:System.out.println("星期二!");break;

case 4:System.out.println("星期三!");break;我爱编程网

case 5:System.out.println("星期四!");break;

case 6:System.out.println("星期五!");break;

case 7:System.out.println("星期六!");break;

}