package com.zsp.quartz.util; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; //Calendar conversion tools: lunar and solar calendar date exchange (lunar calendar date range 19000101~20491229) public class DateUtils { // Calculate the lunar date from 1900 to 2049 private final static int[] LUNAR_INFO = { 0x04bd8, 0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2, 0x04ae0, 0x0a5b6, 0x0a4d0, […]
Tag: date
PWM principle and how to use STM32 to output PWM (continuously updated…)
Table of Contents Table of Contents 1.PWM principle 1.1PWM demonstration 1.2PWM principle (mathematical expression) 2. How does STM32 output PWM? 2.1Basic structure of STM32 clock system 2.2 Registers used by output PWM 2.2.1RCC_CR 2.2.2RCC_CFGR 2.2.3 Configure the clock in Keil5 (MDK-RAM) 2.2.4 Use of TIM timer 3. Example 1: Breathing Lamp (Lamplighting Master) 4. Example […]
Warehouse data incremental update loading algorithm (supports chaotic date batch running)
1. Database construction and test data insertion script –Create incremental update target table –Create table create table EDW_T100_BAL_IU (ID VARCHAR2(8) not null, BAL NUMBER(22,2), UPDATE_DT VARCHAR2(8) ); –Add comments to the table comment on table EDW_T100_BAL_IU is ‘Balance (incremental update mode loading) table’; — Add comments to the columns comment on column EDW_T100_BAL_IU.ID is ‘primary […]
Lock problems caused by select for update statement in KingbaseES
background When the customer performed stress testing on site, periodic TPS dropped significantly. By checking the kwr report, it was found that DBcpu time accounted for very little DBtime time. 90% of DBtime was spent waiting for tuple locks, and the waiting event type was lock. The statement with the longest waiting time is select […]
KingbaseES garbage collection principle and how to prevent bloated updates
Background KingbaseESV8R6 supports snapshot too old. In actual work, we often see tables expanding again. So let’s discuss what are the common causes of object expansion? If autovacuum is not turned on, and there is no reasonable custom vacuum scheduling for users who have not turned on autovacuum, the garbage version of the table will […]
el-date-picker adds default value and modifies style
Expected results The default is this But I hope that there will be a default today’s date, and the font color and style must also be modified (assuming today is 2023/10/6 Function implementation There are quite a few pitfalls that I have stepped on, so I will record them here. Official documentation According to the […]
Introducing .NET MAUI in .NET 8 Release Candidate 1: Quality
Author: David Ortinau Typesetting: Rani Sun Today, we’re excited to announce that .NET MAUI is available in .NET 8 Release Candidate 1, which comes with an official license for production applications, so you can use this version in production with confidence. A major theme of our .NET MAUI work in .NET 8 is code quality. […]
SimpleDateFormat is not thread safe and its solution
【RAEDME】 SimpleDateFormat is not thread-safe, that is, when parsing a string into a date object or formatting a date into a string in a multi-threaded environment, an exception will be thrown; of course, this is a common problem; This article refers to existing SimpleDateFormat analysis articles and makes a summary, including SimpleDateFormat error code and […]
[SimpleDateFormat] Analysis and solutions to class thread insecurity issues
[SimpleDateFormat] Analysis and solutions to thread unsafe issues Preface 1. Problem deduction 1.1 Initial date tool class 1.2 Introducing thread safety issues 1.3 Examples of concurrency issues 1.4 Alibaba specifications 2. Problem analysis 3. Solution 3.1 Using local variables 3.2 synchronized lock 3.3 ThreadLocal method 3.4 Using DateTimeFormatter 4. Summary of advantages and disadvantages of […]
Solution to Jenkins error java.net.UnknownHostException: updates.jenkins.io and other issues
Jenkins error java.net.UnknownHostException: updates.jenkins.io and other issues to solve Error 1: Failed to install jdk-tool java.net.UnknownHostException: updates.jenkins.io solution Error two: The attempt #1 to do the action check updates server failed with an allowed exception: solution Error 1: Failed to install jdk-tool java.net.UnknownHostException: updates.jenkins.io 2023-10-03 14:52:10.515 + 0000 [id=86] INFO h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading jdk-tool 2023-10-03 14:52:15.529 […]