Java之日期处理

Agenda:

    1 What is UTC / UT?

    2 What is GMT?

    3 How to get thecurrent time?

    4 How to format it?

    5 How to convert astring to a date / time?

    6 How to process thedate / time with database?

Here's the answer:

    1 java.lang.System

    2 java.util.Date

    3 java.util.Calendar

    4 java.util.GregorianCalendar

    5 java.util.TimeZone

    6 java.text.DateFormat

    7 java.text.SimpleDateFormat

    8 java.sql.Date

    9 java.sql.Time

    10 java.sql.Timestamp