1.Integer转换成int的方法
Integer i = new Integer(10); int k = i.intValue(); 即Integer.intValue();
2.int转换成Integer
int i = 10; Integer it = new Integer(i);
3.String转换成int的方法
String str = "10"; Integer it = new Interger(str); int i = it.intValue(); 即：int i = Integer.intValue(string);
4.int转换成String
int i = 10; (1)String s = String.valueOf(i); (2)String s = Ingeger.toString(i); (3)String s = "" + i;
5.String转换成Integer
String str = "10"; Integer it = Integer.valueOf(str);
6.Integer转换成String
Integer it = new Integer(10); String str = it.toString();
7.String转换成BigDecimal
BigDecimal bd = new BigDecimal(str);
8.日期
Calendar calendar = Calendar.getInstance(); int year = calendar.get(Calendar.YEAR); int month = calendar.get(Calendar.MONTH)+1; int day = calendar.get(Calendar.DATE); //获取今天的日期字符串 String today = java.text.DateFormat.getDateInstance().format(new java.util.Date()); //获取今天的日期 new java.sql.Date(System.currentTimeMillis());
