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JDBC for transaction management There are four characteristics of a transaction:Atomicity: refers to that the operations contained in a transaction are regarded as a logical unitConsistency: the database is in a consistent state before and after the startIsolation: multiple transactions modified to the database are isolated from each otherThe i ...

The PHP + jQuery UI implements the drag floating layer sorting layout and saves the dragged floating layer position sorting results to the database instance. First, jQuery library and jquery-ui.min.js are introduced, then a drag loading image is placed, and multiple module drag layers are read from the database. Modules and orderlist are used ...

In the previous section, we used a variety of authentication methods of CAS to complete the login authentication in a variety of ways, that is, we mainly used a variety of authentication schemes encapsulated by CAS for us, which can basically meet our multiple needs of authentication. If you still don't know a lot about the multiple authenticat ...

1. Configure Samba service on the server The first step is to install samba service through yum warehouse. The second step is to configure shared resources. In the process of configuring shared resources, samba service uses password authentication mode by default. The password authentication mode is based on the account information databa ...

Hello, what follows is not exclusive content about MAC, basically related to Java environment and basic technology.So this tutorial is common to both linux systems and macOS, so don't worry. In the previous post, we found Docker convenient after installing it.Now let's install Mysql, which is often used in development. MySQL is the most popula ...

How to set the default value in doctrine2? #1 building <?php /** * @Entity */ class myEntity { /** * @var string * * @ORM\Column(name="myColumn", type="integer", options={"default" : 0}) */ private $myColumn; ... } Note that this uses SQL DEFAULT, which is not supported for some fields, such as BLOB ...

1.Job components Job is actually composed of three parts:JobDetail: used to describe what the Job is doingClass implementing Job: specificJobDataMap: used to provide parameters for Job   JobDataMap can be used in other ways besides usingJobData   2.Job concurrency By default, no matter whether the last task is finished or not, as long as the s ...

Author: Wei Xinping, the 5th MySQL practical class student of zhishutang, the 10th MySQL optimization class student, now works as a teaching assistant. Read MySQL 5.7 document 11.2 Date and Time Data Types MySQL can be divided into five types: date, datetime, timestamp, time, and year. Next, I'd like to introduce you one by one. DATE type Store ...

Environment description: jdk 8 + MySQL 8 maven-3.6.0 IDEA (Editor) Require mastery before learning: JDBC MySQL Java Foundation Maven Junit Introduction to Mybatis What is MyBatis MyBatis is an excellent persistence framework MyBatis avoids almost all JDBC code and the process of manually setti ...

1. Simple query statement (DQL) Syntax format: select field name 1, field name 2, field name 3 from table name; mysql> select ename,empno from emp; +--------+-------+ | ename | empno | +--------+-------+ | SMITH | 7369 | | ALLEN | 7499 | | WARD | 7521 | | JONES | 7566 | | MARTIN ...