线程安全的日期处理

依赖

        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.9</version>
        </dependency>

用法

String -> Date

    //成员变量
    DateTimeFormatter dtf = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss");
    //方法调用 
    String str = "2018-01-01 00:00:00";
    Date date = DateTime.parse(str,dtf).toDate();

Date -> String

    String s = new DateTime(date).toString(dtf);
    System.out.println(s);