<dependencies>
    <!-- MyBatis -->
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.2.2</version>
    </dependency>
    <!-- MySQL -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-j</artifactId>
        <version>8.0.33</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <!-- MyBatis Generator 插件 -->
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.5</version>
            <configuration>
                <configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile>
                <verbose>true</verbose>
                <overwrite>true</overwrite>
            </configuration>
            <dependencies>
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-j</artifactId>
                    <version>8.0.33</version>
                </dependency>
            </dependencies>
        </plugin>
    </plugins>
</build>

<?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>
    <!-- 配置上下文，id 唯一標(biāo)識(shí)，targetRuntime 指定生成代碼的方式，風(fēng)格 MyBatis3DynamicSql,MyBatis3,MyBatis3Simple,MyBatis3Kotlin -->
    <context id="mysqlTables" targetRuntime="MyBatis3" defaultModelType="flat">
        <!-- 自動(dòng)檢查關(guān)鍵字，為關(guān)鍵字增加反引號(hào)，如：`type` -->
        <property name="autoDelimitKeywords" value="true"/>
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>
        <!-- 指定生成的 Java 文件編碼 -->
        <property name="javaFileEncoding" value="UTF-8"/>
        <!-- 對(duì)生成的注釋進(jìn)行控制 -->
        <commentGenerator>
            <!-- 由于此插件生成的注釋不太美觀，這里設(shè)置不生成任何注釋 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!-- 數(shù)據(jù)庫(kù)鏈接 -->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/your_database"
                        userId="your_username"
                        password="your_password">
            <!-- 解決多個(gè)重名的表生成表結(jié)構(gòu)不一致問(wèn)題 -->
            <property name="nullCatalogMeansCurrent" value="true"/>
        </jdbcConnection>
        <!-- 不強(qiáng)制將所有的數(shù)值類型映射為 Java 的 BigDecimal 類型 -->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!-- 配置生成實(shí)體類的位置和包名 -->
        <javaModelGenerator targetPackage="com.example.model" targetProject="src/main/java"/>
        <!-- 配置生成 XML 映射文件的位置和包名 -->
        <sqlMapGenerator targetPackage="com.example.mapper" targetProject="src/main/resources"/>
        <!-- 配置生成 Mapper 接口的位置和包名，type="XMLMAPPER" 表示生成 XML 映射文件 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.example.mapper" targetProject="src/main/java"/>
        <!-- 配置要生成代碼的表，tableName 指定數(shù)據(jù)庫(kù)中的表名，domainObjectName 指定生成的實(shí)體類名 -->
<!-- 要生成對(duì)應(yīng)表配置,若想要生成全部表 使用 tableName="%" 即可 -->
        <!-- 訂單詳情表 -->
        <table tableName="order_detail" domainObjectName="OrderDetail"
               <!-- 不生成Example -->
               enableCountByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               enableUpdateByExample="false">
            <!-- 自增主鍵列 -->
            <generatedKey column="id" sqlStatement="MYSQL" identity="true"/>
            <!-- 根據(jù)實(shí)際需求添加其他列的映射配置 -->
        </table>

    </context>
</generatorConfiguration>

mvn mybatis-generator:generate

package com.example.model;

import java.util.ArrayList;
import java.util.List;

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

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

    public void setOrderByClause(String orderByClause) {
        this.orderByClause = orderByClause;
    }

    public String getOrderByClause() {
        return orderByClause;
    }

    public void setDistinct(boolean distinct) {
        this.distinct = distinct;
    }

    public boolean isDistinct() {
        return distinct;
    }

    public List<Criteria> getOredCriteria() {
        return oredCriteria;
    }

    public void or(Criteria criteria) {
        oredCriteria.add(criteria);
    }

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

    public Criteria createCriteria() {
        Criteria criteria = createCriteriaInternal();
        if (oredCriteria.size() == 0) {
            oredCriteria.add(criteria);
        }
        return criteria;
    }

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

    public void clear() {
        oredCriteria.clear();
        orderByClause = null;
        distinct = false;
    }

    protected abstract static class GeneratedCriteria {
        protected List<Criterion> criteria;

        protected GeneratedCriteria() {
            super();
            criteria = new ArrayList<Criterion>();
        }

        public boolean isValid() {
            return criteria.size() > 0;
        }

        public List<Criterion> getAllCriteria() {
            return criteria;
        }

        public List<Criterion> getCriteria() {
            return criteria;
        }

        protected void addCriterion(String condition) {
            if (condition == null) {
                throw new RuntimeException("Value for condition cannot be null");
            }
            criteria.add(new Criterion(condition));
        }

        protected void addCriterion(String condition, Object value, String property) {
            if (value == null) {
                throw new RuntimeException("Value for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition, value));
        }

        protected void addCriterion(String condition, Object value1, Object value2, String property) {
            if (value1 == null || value2 == null) {
                throw new RuntimeException("Between values for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition, value1, value2));
        }

        public Criteria andIdIsNull() {
            addCriterion("id is null");
            return (Criteria) this;
        }

        public Criteria andIdIsNotNull() {
            addCriterion("id is not null");
            return (Criteria) this;
        }

        public Criteria andIdEqualTo(Integer value) {
            addCriterion("id =", value, "id");
            return (Criteria) this;
        }

        // 其他條件方法...
    }

    public static class Criteria extends GeneratedCriteria {

        protected Criteria() {
            super();
        }
    }

    public static class Criterion {
        private String condition;
        private Object value;
        private Object secondValue;
        private boolean noValue;
        private boolean singleValue;
        private boolean betweenValue;
        private boolean listValue;
        private String typeHandler;

        public String getCondition() {
            return condition;
        }

        public Object getValue() {
            return value;
        }

        public Object getSecondValue() {
            return secondValue;
        }

        public boolean isNoValue() {
            return noValue;
        }

        public boolean isSingleValue() {
            return singleValue;
        }

        public boolean isBetweenValue() {
            return betweenValue;
        }

        public boolean isListValue() {
            return listValue;
        }

        public String getTypeHandler() {
            return typeHandler;
        }

        protected Criterion(String condition) {
            super();
            this.condition = condition;
            this.noValue = true;
        }

        protected Criterion(String condition, Object value, String typeHandler) {
            super();
            this.condition = condition;
            this.value = value;
            this.typeHandler = typeHandler;
            if (value instanceof List<?>) {
                this.listValue = true;
            } else {
                this.singleValue = true;
            }
        }

        protected Criterion(String condition, Object value) {
            this(condition, value, null);
        }

        protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {
            super();
            this.condition = condition;
            this.value = value;
            this.secondValue = secondValue;
            this.typeHandler = typeHandler;
            this.betweenValue = true;
        }

        protected Criterion(String condition, Object value, Object secondValue) {
            this(condition, value, secondValue, null);
        }
    }
}

List<User> users = userMapper.selectMany(SelectStatementProvider.builder()
    .select(UserDynamicSqlSupport.id, UserDynamicSqlSupport.name, UserDynamicSqlSupport.email)
    .from(UserDynamicSqlSupport.user)
    .where(UserDynamicSqlSupport.name, isEqualTo("張三"))
    .build());

public class UserQuery {
    private UserExample example;

    public UserQuery() {
        this.example = new UserExample();
    }

    public UserQuery idIsNull() {
        example.createCriteria().andIdIsNull();
        return this;
    }

    public UserQuery idIsNotNull() {
        example.createCriteria().andIdIsNotNull();
        return this;
    }

    public UserQuery idEqualTo(Integer id) {
        example.createCriteria().andIdEqualTo(id);
        return this;
    }

    // 其他條件方法...

    public UserExample build() {
        return example;
    }
}

// 使用封裝的查詢條件構(gòu)建器
List<User> users = userMapper.selectByExample(new UserQuery().idEqualTo(1).build());