Hutool database configuration must be written to death? 5

A database management system is a large-scale software that manipulates and manages databases, and is used to establish, use, and maintain databases, or DBMS for short. It manages and controls the database in a unified manner to ensure the security and integrity of the database. Users access the data in the database through the DBMS, and the database administrator also uses the DBMS to maintain the database.

It enables multiple applications and users to create, modify, and interrogate databases in different ways, at the same time or at different times. Most DBMS provide Data Definition Language (DDL) and Data Manipulation Language (DML) for users to define the schema structure and permission constraints of the database, and to append and delete data. The database management system is the core of the database system and is the software that manages the database.

The database management system is a software that realizes the abstract logical data processing in the sense of the user and converts it into the specific physical data processing in the computer. With a database management system, users can process data in an abstract sense, regardless of the layout and physical location of the data on the computer.

Tut-tut, and**Yes and don't want to give any advice anymore.

The easiest way is to use the JDBC implementation, connect to the database, query the resultset, and then take out the result, and assign the value to **.

If the IP address changes and there are many connectors, it is better to write the domain name, because once the database IP address changes, you can change the DNS.

In addition, if there is a load balancer, the domain name is more convenient than the IP address.

However, domain names require one more DNS resolution than IP addresses, but they are negligible when there is a connection pool.

The configuration file can be in any form, xml or txt, such as the connection configuration of the database.

For example: This sentence must be there, and you can write it at will.

This is a configuration file, and the value in WinForm can be read directly with the readxml() method of the dataset.

I don't think I need to say anything about reading the file.

Regarding the implicit call of dll, it is recommended that the landlord learn the loadlibrary and getprocaddress functions.

There is no certain way to write configuration files, they are generally defined in the way of xml, like you said, you can define the configuration file like this.

The priority is from top to bottom, and the low one is called only when the high priority is not present.

When configuring the read, you can directly read the value of name through loadlibrary

It can be stored in text and then converted by an encryption formula.

It can be written in a dll. Then register the dll, and as for the specific call, it depends on what language you write it in.

Of course, it's okay to write the database query statement to death, and the programmer must have done it at the beginning, but as long as there is a small change in your query statement, you have to recompile your program, if you are in the development environment, you can compile at any time when you encounter problems, if you are in the production environment, you don't have the development tools at hand, only Notepad, you can't do it.

**Separate from data for easy maintenance.

Hope it helps. Answer.

Welcome to login.

into the username" id="name"/>

I don't have an account or forgot my password.

I think if you send it up, someone will write it to you for 2 yuan.