How to use Mybatis official generator

<plugin>
    <groupId></groupId>
    <artifactId>mybatis-generator-maven-plugin</artifactId>
    <version>1.4.0</version>
    <configuration>
        <!-- Specify MyBatis Generator Configuration file -->
        <configurationFile>src/main/resources/</configurationFile>
        
        <!-- If you need to overwrite existing code，set up overwrite for true -->
        <overwrite>true</overwrite>
        
        <!-- Display detailed logs during the generation process -->
        <verbose>true</verbose>
    </configuration>
    <dependencies>
        <!-- Add database connection dependencies，like MySQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.22</version>
        </dependency>
    </dependencies>
</plugin>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-////DTD MyBatis Generator Configuration 1.0//EN"
        "/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <context  targetRuntime="MyBatis3" defaultModelType="flat">

        <!-- Automatically check the database keywords and add backquotes，Avoid conflicts with database keywords -->
        <property name="autoDelimitKeywords" value="true"/>
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>

        <!-- Plug-in configuration：Enhanced XML Mergerability -->
        <plugin type=""/>

        <!-- Plug-in configuration：Automatically generated toString() method -->
        <plugin type=""/>

        <!-- Configure comment generation policy，Select not to generate comments here -->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <!-- Configure database connections，Modify the connection information to the actual database -->
        <jdbcConnection driverClass=""
                        connectionURL="jdbc:mysql://localhost:3306/train?characterEncoding=UTF8&allowPublicKeyRetrieval=true&useSSL=false&serverTimezone=Asia/Shanghai"
                        userId="train"
                        password="123456">
        </jdbcConnection>

        <!-- Configure the generated entity class location -->
        <javaModelGenerator targetProject="../member/src/main/java"
                            targetPackage=""/>

        <!-- Configuration generated SQL Map file location -->
        <sqlMapGenerator targetProject="../member/src/main/resources"
                         targetPackage="mapper"/>

        <!-- Configuration generated Mapper Class Location -->
        <javaClientGenerator targetProject="../member/src/main/java"
                             targetPackage=""
                             type="XMLMAPPER"/>

        <!-- Select the database table to generate the code -->
        <table tableName="passenger" domainObjectName="Passenger"/>
    </context>
</generatorConfiguration>

mvn mybatis-generator:generate

src/main/java
    └── com
        └── stu
            └── train
                └── member
                    └── domain
                        └──    <-- Generated entity class
                        └──    <-- Generated auxiliary class
                    └── mapper
                        └──    <-- Generated Mapper interface
src/main/resources
    └── mapper
        └──   <-- Generated XML Mapping files

public class Passenger {
    private Integer id;
    private String name;
    private Integer age;

    // Getter and Setter methods
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
         = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
         = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
         = age;
    }
}

public interface PassengerMapper {
    int deleteByPrimaryKey(Integer id);

    int insert(Passenger record);

    Passenger selectByPrimaryKey(Integer id);

    int updateByPrimaryKey(Passenger record);

    List<Passenger> selectByExample(PassengerExample example);
}

<mapper namespace="">
    <!-- Query a single passenger -->
    <select  resultType="">
        SELECT id, name, age FROM passenger WHERE id = #{id}
    </select>

    <!-- Insert passenger -->
    <insert  parameterType="">
        INSERT INTO passenger (name, age) VALUES (#{name}, #{age})
    </insert>

    <!-- Delete passengers -->
    <delete  parameterType="">
        DELETE FROM passenger WHERE id = #{id}
    </delete>

    <!-- Update passengers -->
    <update  parameterType="">
        UPDATE passenger
        SET name = #{name}, age = #{age}
        WHERE id = #{id}
    </update>
</mapper>

public class PassengerExample {
    protected String orderByClause;
    protected boolean distinct;
    protected List<Criteria> oredCriteria;

    public PassengerExample() {
        oredCriteria = new ArrayList<>();
    }

    // Set the sorting field    public void setOrderByClause(String orderByClause) {
         = orderByClause;
    }

    public String getOrderByClause() {
        return orderByClause;
    }

    // Set whether to re-release query    public void setDistinct(boolean distinct) {
         = distinct;
    }

    public boolean isDistinct() {
        return distinct;
    }

    // Get all query conditions    public List<Criteria> getOredCriteria() {
        return oredCriteria;
    }

    // Add query conditions    public void or(Criteria criteria) {
        (criteria);
    }

    public Criteria or() {
        Criteria criteria = createCriteriaInternal();
        (criteria);
        return criteria;
    }

    // Create query conditions    public Criteria createCriteria() {
        Criteria criteria = createCriteriaInternal();
        if (() == 0) {
            (criteria);
        }
        return criteria;
    }

    protected Criteria createCriteriaInternal() {
        return new Criteria();
    }

    // Clear query conditions    public void clear() {
        ();
        orderByClause = null;
        distinct = false;
    }

    public static class Criteria {
        protected List<Criterion> criteria;

        protected Criteria() {
            criteria = new ArrayList<>();
        }

        // Determine whether the conditions are valid        public boolean isValid() {
            return () > 0;
        }

        // Get all conditions        public List<Criterion> getAllCriteria() {
            return criteria;
        }

        // Add a single condition        public void addCriterion(String condition) {
            (new Criterion(condition));
        }

        public void addCriterion(String condition, Object value, String property) {
            (new Criterion(condition, value));
        }

        public void addCriterion(String condition, Object value1, Object value2, String property) {
            (new Criterion(condition, value1, value2));
        }

        // For example, add condition: id = ?        public Criteria andIdEqualTo(Integer value) {
            addCriterion("id =", value, "id");
            return this;
        }

        // For example, add condition: name like ?        public Criteria andNameLike(String value) {
            addCriterion("name like", value, "name");
            return this;
        }

        // ...More query conditions methods    }

    // Used to represent a condition    public static class Criterion {
        private String condition;
        private Object value;
        private Object secondValue;

        public Criterion(String condition) {
             = condition;
        }

        public Criterion(String condition, Object value) {
            this(condition);
             = value;
        }

        public Criterion(String condition, Object value, Object secondValue) {
            this(condition, value);
             = secondValue;
        }

        public String getCondition() {
            return condition;
        }

        public Object getValue() {
            return value;
        }

        public Object getSecondValue() {
            return secondValue;
        }
    }
}

PassengerExample example = new PassengerExample();
 criteria = ();
("%John%");  // Query the record in the name field containing "John"(20);  // Query records with age greater than 20
List<Passenger> passengers = (example);