Question

    import java.util.Calendar;

    public class Employee {
        private Calendar doj; 
        public Employee(Calendar date) {
            // TODO Auto-generated constructor stub
            this.doj=date;
        }
        public Calendar getDoj() 
        { 
        return doj; 
        } 

    }



import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;


public class TestEmployeeSort {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        List<Employee> coll = getEmployees();
        printList(coll);
    }
        public static List<Employee> getEmployees() 
        { 
            List<Employee> col = new ArrayList<Employee>();

            col.add(new Employee(Calendar.getInstance()));
            return col;
        } 
        private static void printList(List<Employee> list) { 
            System.out.println("Date_Of_Joining"); 

            for (int i = 0; i < list.size(); i++) { 
                Employee e = list.get(i); 
                System.out.println(e.getDoj()); 
            } 
        } 
    }

以上代码产生以下输出加入的日期 java.util.GregorianCalendar中[时间= 1291275522078，areFieldsSet =真，areAllFieldsSet =真，宽大=真，区= sun.util.calendar.ZoneInfo [ID = “亚洲/加尔各答”，偏移= 19800000，dstSavings = 0，useDaylight =假，过渡= 6，lastRule =空]，Firstdayofweek可= 1，minimalDaysInFirstWeek = 1，ERA = 1，YEAR = 2010，月= 11，WEEK_OF_YEAR = 49，WEEK_OF_MONTH = 1，DAY_OF_MONTH = 2，DAY_OF_YEAR = 336，DAY_OF_WEEK = 5 ，DAY_OF_WEEK_IN_MONTH = 1，AM_PM = 1，HOUR = 1，HOUR_OF_DAY = 13，MINUTE = 8，SECOND = 42，微差= 78，ZONE_OFFSET = 19800000，DST_OFFSET = 0]

我只需要单独打印日期。我该如何更改代码？

Answer 1

个人而言我会使用Joda Time（及其LocalDate类，如果你真的只想维持日期而不是java.util.Calendar，但如果你做< / em>想要使用Calendar，您需要SimpleDateFormat。

java.util.Calendar示例：

import java.util.*; import java.text.*; public class Test { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy"); System.out.println(format.format(calendar.getTime())); } }

Joda时间样本：

import org.joda.time.*; import org.joda.time.format.*; public class Test { public static void main(String[] args) { LocalDate today = new LocalDate(); // Alternatively, use DateTimeFormat.mediumDate etc DateTimeFormatter formatter = DateTimeFormat.forPattern("dd/MM/yyyy"); System.out.println(formatter.print(today)); } }

Answer 2

使用java.text.DateFormat代替裸Calendar。

Answer 3

使用返回Date的Caledar.getTime（）。然后使用SimpleDateFormat格式化它。

Answer 4

签出http://veyder-time.enblom.org这是java.util.Calendar的一个简单而强大的替代方案。

日历api单独显示日期

4 个答案: