Here you can find the source of localDateTimeToString(LocalDateTime value)
public static String localDateTimeToString(LocalDateTime value)
//package com.java2s; //License from project: Open Source License import java.time.*; public class Main { /**//from w w w. j a va2s.c o m * localDateTimeToString, This will return the supplied LocalDateTime as a string. If the value * is null, this will return the value of emptyTimeString. Time values will be output in the * same format as LocalDateTime.toString(). * * Javadocs from LocalDateTime.toString(): * * Outputs this date-time as a {@code String}, such as {@code 2007-12-03T10:15:30}. * <p> * The output will be one of the following ISO-8601 formats: * <ul> * <li>{@code uuuu-MM-dd'T'HH:mm}</li> * <li>{@code uuuu-MM-dd'T'HH:mm:ss}</li> * <li>{@code uuuu-MM-dd'T'HH:mm:ss.SSS}</li> * <li>{@code uuuu-MM-dd'T'HH:mm:ss.SSSSSS}</li> * <li>{@code uuuu-MM-dd'T'HH:mm:ss.SSSSSSSSS}</li> * </ul> * The format used will be the shortest that outputs the full value of the time where the * omitted parts are implied to be zero. */ public static String localDateTimeToString(LocalDateTime value, String emptyTimeString) { return (value == null) ? emptyTimeString : value.toString(); } /** * localDateTimeToString, This will return the supplied LocalDateTime as a string. If the value * is null, this will return an empty string (""). Time values will be output in the same format * as LocalDateTime.toString(). * * Javadocs from LocalDateTime.toString(): * * Outputs this date-time as a {@code String}, such as {@code 2007-12-03T10:15:30}. * <p> * The output will be one of the following ISO-8601 formats: * <ul> * <li>{@code uuuu-MM-dd'T'HH:mm}</li> * <li>{@code uuuu-MM-dd'T'HH:mm:ss}</li> * <li>{@code uuuu-MM-dd'T'HH:mm:ss.SSS}</li> * <li>{@code uuuu-MM-dd'T'HH:mm:ss.SSSSSS}</li> * <li>{@code uuuu-MM-dd'T'HH:mm:ss.SSSSSSSSS}</li> * </ul> * The format used will be the shortest that outputs the full value of the time where the * omitted parts are implied to be zero. */ public static String localDateTimeToString(LocalDateTime value) { return (value == null) ? "" : value.toString(); } }