spring中时间格式化的两种方法示例讲解

public class DateUtil {
    public static String formatDate(Date date){
        SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return simpleDateFormat.format(date);
    }
}

   public String getCreateTime() {
        if (createTime==null){
            return "";
        }
        return DateUtil.formatDate(createTime);
    }

  # JSON序列化配置
Spring:
  jackson:
    date-format: yyyy-MM-dd HH:mm:ss # 日期格式

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateTime = df.format(new Date());

public class Order {
	// timezone：是时间设置为东八区，避免时间在转换中有误差
	@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss",timezone = "GMT+8")
	private Date createDate;
}

public class Order {
	@JSONField(format="yyyy-MM-dd HH:mm:ss")
    private Date time;
}

public class Order {
	@DateTimeFormat(pattern = "yyyy-MM-dd")
    private Date createDate;
}

public class Order {
	@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss",timezone = "GMT+8")
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private Date createDate;
}

String dateTime1="2018-02-18 20:53:45";
String dateTime2="2018-02-18";
String dateTime3="20:53:45";
String dateTime4="2018-02-18 20:53";
//将不同的格式转换为Date对象
Date date1=DateUtil.parse(dateTime1);  
System.out.println("date1:"+date1.toString());
Date date2=DateUtil.parse(dateTime2);
System.out.println("date2:"+date2.toString());
Date date3=DateUtil.parse(dateTime3);
System.out.println("date3:"+date3.toString());
Date date4=DateUtil.parse(dateTime4);
System.out.println("date4:"+date4.toString());
//使用DateUtil.parse(String,String):Date 转换为指定格式的Date对象
Date date5=DateUtil.parse(dateTime1, "yyyy-MM-dd");
System.out.println("date5:"+date5.toString());