Table of Contents
1. Configuration file description
2. Configuration parameter analysis
(1)jdbcConnection
(2)javaModelGenerator
(3)sqlMapGenerator
(4)javaClientGenerator
(5)table
3. Best Practices
(1) Keep the configuration file concise and clear
(2) Select the generated object according to actual needs
(3) Add custom plug-in
4. Code example
Conclusion
Home Java javaTutorial MyBatis Generator configuration parameter interpretation and best practices

MyBatis Generator configuration parameter interpretation and best practices

Feb 23, 2024 am 09:51 AM
mybatis Configuration sql statement

MyBatis Generator配置参数解读及最佳实践

MyBatis Generator is a code generation tool officially provided by MyBatis, which can help developers quickly generate Java Beans, Mapper interfaces and XML mapping files that conform to the database table structure. In the process of using MyBatis Generator for code generation, the setting of configuration parameters is crucial. This article will delve into the best practices of MyBatis Generator from the perspective of configuration parameters and provide readers with specific code examples.

1. Configuration file description

Before using MyBatis Generator for code generation, you need to write a configuration file named generatorConfig.xml to guide the generation of code. Behavior. The following is a simple configuration file example:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration PUBLIC
        "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <context id="DB2Tables" targetRuntime="MyBatis3">
        <!-- 数据库连接信息 -->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/test"
                        userId="root"
                        password="123456">
        </jdbcConnection>

        <!-- 实体类、Mapper接口、XML映射文件生成路径 -->
        <javaModelGenerator targetPackage="com.example.model"
                            targetProject="src/main/java">
        </javaModelGenerator>

        <sqlMapGenerator targetPackage="mapper"
                         targetProject="src/main/resources">
        </sqlMapGenerator>

        <!-- Mapper接口的生成 -->
        <javaClientGenerator type="XMLMAPPER"
                              targetPackage="com.example.mapper"
                              targetProject="src/main/java">
        </javaClientGenerator>
        
        <!-- 数据库表及生成的代码配置 -->
        <table tableName="user" domainObjectName="User"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>
    </context>
</generatorConfiguration>
Copy after login

In the above configuration file, we define the database connection information, generated entity class, Mapper interface and XML mapping file path, and set the database table to generate code and related configurations.

2. Configuration parameter analysis

In the configuration file, there are some key configuration parameters that require our special attention. They play a decisive role in the effect and quality of the generated code. Let’s parse these parameters one by one:

(1)jdbcConnection

jdbcConnection node is used to configure database connection information, including database driver class, connection URL, username and password, etc. In actual applications, you need to make corresponding modifications according to your own database configuration.

(2)javaModelGenerator

javaModelGenerator The node is used to configure the package name and storage path of the generated entity class (Java Bean). By setting the targetPackage and targetProject parameters, we can specify the generation path of the entity class.

(3)sqlMapGenerator

sqlMapGenerator node is used to configure the package name and storage path of the generated XML mapping file. Similarly, we can specify the generation path of the XML mapping file by setting the targetPackage and targetProject parameters.

(4)javaClientGenerator

javaClientGenerator node is used to configure the package name and storage path of the generated Mapper interface. By setting the type parameter to XMLMAPPER, you can specify to generate a Mapper interface based on XML configuration.

(5)table

table The node is used to configure the database table information for generating code, including table name, generated entity class name, Whether to enable specific query methods, etc. You can control the behavior of generated code by setting different properties.

3. Best Practices

When using MyBatis Generator to generate code, we can follow the following best practices:

(1) Keep the configuration file concise and clear

Try to avoid adding too many configurations to the configuration file, and you can flexibly adjust the scope and content of the generated code according to project needs. At the same time, configuration files with clear comments and simple structure help code maintenance and management.

(2) Select the generated object according to actual needs

In the table node, you can choose whether to enable certain query methods according to specific needs to reduce the redundancy of generation code. For example, if you do not need to use the selectByExample method, you can disable it by setting enableSelectByExample="false".

(3) Add custom plug-in

In addition to the default generation rules, we can also write custom plug-ins to extend the functionality of MyBatis Generator. By writing plug-ins, you can achieve a more flexible code generation strategy that better meets project needs.

4. Code example

The following is a complete example showing how to use MyBatis Generator to generate a simple User entity class and the corresponding Mapper interface and XML mapping file:

public class User {
    private Long id;
    private String username;
    private String password;
    
    // Getters and setters
}
Copy after login
public interface UserMapper {
    int insert(User record);
    
    int deleteByPrimaryKey(Long id);
    
    int updateByPrimaryKey(User record);
    
    User selectByPrimaryKey(Long id);
}
Copy after login
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.mapper.UserMapper">
    
    <resultMap id="BaseResultMap" type="User">
        <id column="id" property="id" />
        <result column="username" property="username" />
        <result column="password" property="password" />
    </resultMap>
    
    <insert id="insert" parameterType="User">
        INSERT INTO user (id, username, password) VALUES (#{id}, #{username}, #{password})
    </insert>
    
    <!-- 其他SQL语句 -->
    
</mapper>
Copy after login

Conclusion

Through the introduction of this article, readers should have a deeper understanding of the configuration parameters of MyBatis Generator and understand the best practices. In actual projects, by setting configuration parameters appropriately and using custom plug-ins flexibly, the MyBatis Generator tool can be used more efficiently to generate code that meets project requirements. I hope this article will be helpful to readers when using MyBatis Generator.

The above is the detailed content of MyBatis Generator configuration parameter interpretation and best practices. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to use the iif function in excel How to use the iif function in excel Mar 20, 2024 pm 06:10 PM

Most users use Excel to process table data. In fact, Excel also has a VBA program. Apart from experts, not many users have used this function. The iif function is often used when writing in VBA. It is actually the same as if The functions of the functions are similar. Let me introduce to you the usage of the iif function. There are iif functions in SQL statements and VBA code in Excel. The iif function is similar to the IF function in the excel worksheet. It performs true and false value judgment and returns different results based on the logically calculated true and false values. IF function usage is (condition, yes, no). IF statement and IIF function in VBA. The former IF statement is a control statement that can execute different statements according to conditions. The latter

Understand Linux Bashrc: functions, configuration and usage Understand Linux Bashrc: functions, configuration and usage Mar 20, 2024 pm 03:30 PM

Understanding Linux Bashrc: Function, Configuration and Usage In Linux systems, Bashrc (BourneAgainShellruncommands) is a very important configuration file, which contains various commands and settings that are automatically run when the system starts. The Bashrc file is usually located in the user's home directory and is a hidden file. Its function is to customize the Bashshell environment for the user. 1. Bashrc function setting environment

How to query oracle database logs How to query oracle database logs Apr 07, 2024 pm 04:51 PM

Oracle database log information can be queried by the following methods: Use SQL statements to query from the v$log view; use the LogMiner tool to analyze log files; use the ALTER SYSTEM command to view the status of the current log file; use the TRACE command to view information about specific events; use operations System tools look at the end of the log file.

How to use sql statement to query the storage structure of mysql database How to use sql statement to query the storage structure of mysql database Apr 14, 2024 pm 07:45 PM

To query the MySQL database storage structure, you can use the following SQL statement: SHOW CREATE TABLE table_name; this statement will return the column definition and table option information of the table, including column name, data type, constraints and general properties of the table, such as storage engine and character set.

How to export the queried data in navicat How to export the queried data in navicat Apr 24, 2024 am 04:15 AM

Export query results in Navicat: Execute query. Right-click the query results and select Export Data. Select the export format as needed: CSV: Field separator is comma. Excel: Includes table headers, using Excel format. SQL script: Contains SQL statements used to recreate query results. Select export options (such as encoding, line breaks). Select the export location and file name. Click "Export" to start the export.

How to solve mysql database initialization failure How to solve mysql database initialization failure Apr 14, 2024 pm 07:12 PM

To resolve the MySQL database initialization failure issue, follow these steps: Check permissions and make sure you are using a user with appropriate permissions. If the database already exists, delete it or choose a different name. If the table already exists, delete it or choose a different name. Check the SQL statement for syntax errors. Confirm that the MySQL server is running and connectable. Verify that you are using the correct port number. Check the MySQL log file or Error Code Finder for details of other errors.

How to execute sql statement in mysql database How to execute sql statement in mysql database Apr 14, 2024 pm 07:48 PM

MySQL SQL statements can be executed by: Using the MySQL CLI (Command Line Interface): Log in to the database and enter the SQL statement. Using MySQL Workbench: Start the application, connect to the database, and execute statements. Use a programming language: import the MySQL connection library, create a database connection, and execute statements. Use other tools such as DB Browser for SQLite: download and install the application, open the database file, and execute the statements.

How to configure and install FTPS in Linux system How to configure and install FTPS in Linux system Mar 20, 2024 pm 02:03 PM

Title: How to configure and install FTPS in Linux system, specific code examples are required. In Linux system, FTPS is a secure file transfer protocol. Compared with FTP, FTPS encrypts the transmitted data through TLS/SSL protocol, which improves Security of data transmission. In this article, we will introduce how to configure and install FTPS in a Linux system and provide specific code examples. Step 1: Install vsftpd Open the terminal and enter the following command to install vsftpd: sudo

See all articles