mybatis:逆向工程生成sql的使用

pom文件添加相关依赖

 <!-- 依赖MyBatis核心包 -->
<dependencies>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.2.8</version>
    </dependency>
</dependencies>

<!-- 控制Maven在构建过程中相关配置 -->
<build>
    
    <!-- 构建过程中用到的插件 -->
    <plugins>
    
        <!-- 具体插件，逆向工程的操作是以构建过程中插件形式出现的 -->
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.0</version>

            <!-- 插件的依赖 -->
            <dependencies>
            
                <!-- 逆向工程的核心依赖 -->
                <dependency>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-core</artifactId>
                    <version>1.3.2</version>
                </dependency>
                
                <!-- 数据库连接池 -->
                <dependency>
                    <groupId>com.mchange</groupId>
                    <artifactId>c3p0</artifactId>
                    <version>0.9.2</version>
                </dependency>
                
                <!-- MySQL驱动 -->
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>5.1.8</version>
                </dependency>
            </dependencies>
        </plugin>
    </plugins>
</build>

generatorConfig.xml

<?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="atguiguTables" targetRuntime="MyBatis3">
        <commentGenerator>
            <!-- 是否去除自动生成的注释 true:是;false:否 -->
            <property name="suppressAllComments" value="true" />
        </commentGenerator>

        <!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
        <jdbcConnection 
            driverClass="com.mysql.jdbc.Driver"
            connectionURL="jdbc:mysql://localhost:3306/crowdfunding" 
            userId="root"
            password="1234">
        </jdbcConnection>

        <!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL 
            和 NUMERIC 类型解析为java.math.BigDecimal -->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!-- targetProject:生成Entity类的路径 -->
        <javaModelGenerator targetProject=".\src\main\java"
            targetPackage="com.crowd.entity">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
            <!-- 从数据库返回的值被清理前后的空格 -->
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!-- targetProject:XxxMapper.xml映射文件生成的路径 -->
        <sqlMapGenerator targetProject=".\src\main\java"
            targetPackage="com.crowd.mapper">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </sqlMapGenerator>

        <!-- targetPackage：Mapper接口生成的位置 -->
        <javaClientGenerator type="XMLMAPPER"
            targetProject=".\src\main\java"
            targetPackage="com.crowd.mapper">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>

        <!-- 数据库表名字和我们的entity类对应的映射指定 -->
        <table tableName="t_admin" domainObjectName="Admin" />

    </context>
</generatorConfiguration>

逆向工程执行命令

mybatis-generator:generate