dianwangAdm/src/main/java/com/minpay/test.java

package com.minpay;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class test {

    public static void main(String[] args) {
        String datetime = "20140212111012";
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyyMMddHHmmss");
        LocalDateTime ldt = LocalDateTime.parse(datetime,dtf);
        System.out.println(ldt);
        DateTimeFormatter fa = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        String datetime2 = ldt.format(fa);
        System.out.println(datetime2);
    }
}