The mobile terminal detects that the wechat browser returns, closes and enters the background operation

Background: for a recent countdown learning time recording project, you need to record the progress of the current page when the user clicks the back button of the browser or directly closes the browser, or directly exits wechat or enters the background. The next time you go in, you need to start the countdown from the last place you left. At f ...

Added by edgev on Fri, 08 May 2020 13:39:14 +0300

[2020Python cultivation] MySQL view, trigger, transaction, stored procedure and function

[contents] (the rest are knowledge) A view Two triggers Three Affairs (mastery) Four stored procedures Five functions Vi. process control 7, Index theory   1, View 1. What is a view A view is a virtual table (non real existence). Its essence is to get a dynamic data set according to SQL statements and name it. When users use it, they only ne ...

Added by csplrj on Fri, 08 May 2020 11:46:25 +0300

Computer room charging system (2)

The charge system in the computer room is half developed. From blind helplessness at the beginning to being able to proceed slowly now, it is a small progress. The basic data setting window in the computer room charging system is a very important window in the whole software. When I open the database software, I see that there are many pieces o ...

Added by aquilla on Wed, 06 May 2020 03:28:31 +0300

Use of Spring JDBC

Spring's JDBC module is responsible for database resource management and error handling, which greatly simplifies the operation of the database by the developers, so that the developers can get rid of the tedious database operation, so as to put more energy into writing business logic. For the Spring framework of database operation, the JdbcTem ...

Added by twilitegxa on Tue, 05 May 2020 09:44:21 +0300

Mixed query of tp5+Mongodb and Mysql database

Preface MongoDB mass data query is fast without data model Suitable for log database Or the intermediate database reads and stores some business data to be read from the MySQL database MongoDB is not suitable for multi table transaction function, and there is not a good determination mechanism for write operation. It is not suitabl ...

Added by steved on Tue, 05 May 2020 01:46:33 +0300

Android Project Actual Series - based on Bosch Valley profile

Please be patient to read this module because of its large content and length. The profile module is divided into two parts [x] personal data [x] Data Modification 1. Personal Data 1. Profile interface (1) Create a profile interface Create a java class named UserInfoActivity in the com.buxuegu.activity package.Create a layout file name ...

Added by riddhi on Mon, 04 May 2020 23:33:23 +0300

Enum, generics, reflection, JDBC integration

brief introduction Environmental preparation Project directory jar package used Database connection configuration JDBC configuration file Run tests brief introduction JDBC (Java database connectivity) is a Java API used to execute SQL statements. It can provide unified access to a variety of relationa ...

Added by asdf on Sun, 03 May 2020 15:38:15 +0300

Create table exception related to search path (HGDB)

The database objects created by HGDB are related to the value of the variable search [u path]. When creating objects, if no mode is specified, these objects will be created in the default mode, which is called pubulic. One exception is that another pattern first appears in search [u path. The following problem is thrown ...

Added by etones on Sun, 03 May 2020 11:31:52 +0300

Registration form of computer room charging system

Preface The charge system of the computer room has entered the registration window. I feel that the computer room is the same as many places of the students, but because the computer room is completed by myself, and the help from the outside is less, I have to sort out the logic by myself and design the code by myself (most of them are to fin ...

Added by Stevis2002 on Sun, 03 May 2020 03:38:23 +0300

Java learning notes 51 (integrated project: home accounting system)

This case almost uses all the contents of the first 50 articles to realize a simple family accounting software Function: add, delete, modify, query by criteria Required jar package: commons-dbcp-1.4.jar commons-pool-1.5.6.jar mysql-connector-java-5.1.37-bin.jar commons-dbutils-1.6.jar   Database table creation: /* Create database Name gjp ...

Added by yashvant on Sat, 02 May 2020 22:52:29 +0300