将字符串类型转换为日期类型

package timeutil;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class TimeTest {

    public static void main(String[] args) {

        String s1 = "20151117190936";
        String s2="20090915-17:20:12";
        try {
            Date date1 = new SimpleDateFormat("yyyyMMddHHmmss").parse(s1);
            //输出格式
            System.out.println("=======解析字符串1======");
            System.out.println(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(date1));
            System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date1));
            System.out.println("=======解析字符串2======");
            Date date2 = new SimpleDateFormat("yyyyMMdd-HH:mm:ss").parse(s2);
            System.out.println(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(date2));
            System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date2));
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }

}

运行结果：

=======解析字符串1======

2015/11/17 19:09:36

2015-11-17 19:09:36

=======解析字符串2======

2009/09/15 17:20:12

2009-09-15 17:20:12