Mybatis逆向工程

学习了b站一位小哥的mybatis逆向工程，这里写一个笔记，视频地址：https://www.bilibili.com/video/BV16E411q7aP?from=search&seid=2547198468275404373

mybatis逆向工程

mybatis逆向工程官网地址：http://mybatis.org/generator/index.html

1、创建一个普通的maven项目，导入pom依赖

<dependencies>
    <!--mybatis-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.4.5</version>
    </dependency>
    <!--数据库连接池 驱动-->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.2</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.41</version>
    </dependency>
    <!--========================逆向工程==================================-->
    <dependency>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-core</artifactId>
        <version>1.3.5</version>
    </dependency>
</dependencies>
<build>
    <!--逆向工程的maven插件-->
    <!--注意这个plugin的位置，是在build下的第一级子标签-->
    <plugins>
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.5</version>
            <configuration>
                <!--指定配置文件的名字位置-->
                <configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile>
                <overwrite>true</overwrite>
                <verbose>true</verbose>
            </configuration>
            <dependencies>
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>5.1.10</version>
                </dependency>
                <dependency>
                    <groupId>org.mybatis</groupId>
                    <artifactId>mybatis</artifactId>
                    <version>3.4.5</version>
                </dependency>
            </dependencies>
        </plugin>
    </plugins>
    <finalName>ssm-crud</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent 
        <plugins>
            <plugin>
                <artifactId>maven-clean-plugin</artifactId>
                <version>3.1.0</version>
            </plugin>
            <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_fo
            <plugin>
                <artifactId>maven-resources-plugin</artifactId>
                <version>3.0.2</version>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.1</version>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.2.2</version>
            </plugin>
            <plugin>
                <artifactId>maven-install-plugin</artifactId>
                <version>2.5.2</version>
            </plugin>
            <plugin>
                <artifactId>maven-deploy-plugin</artifactId>
                <version>2.8.2</version>
            </plugin>
        </plugins>
    </pluginManagement>
</build>

2、编写dao层跟ben的包

 3、编写properties配置文件：/resources/dbconfig.properties

jdbc.jdbcUrl=jdbc:mysql://182.92.209.212:3306/mybatis_plus?userSSL=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=密码

# 通用Mapper固定配置（不需要修改）
mapper.plugin=tk.mybatis.mapper.generator.MapperPlugin
mapper.Mapper=tk.mybatis.mapper.common.Mapper
mapper.forceAnnotation=true

# 生成文件保存位置(修改自己的包名)
targetModelPackage=com.zhixi.bean
targetXMLPackage=com.zhixi.dao
targetMapperPackage=com.zhixi.dao
targetJavaProject=src/main/java
targetResourcesProject=src/main/java

4、编写逆向工程配置文件：/resources/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>
    <properties resource="dbconfig.properties"/>

    <context id="Mysql" targetRuntime="MyBatis3" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>

        <!--支持序列化-->
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"></plugin>

        <!--
        <plugin type="${mapper.plugin}">
            <property name="mappers" value="${mapper.Mapper}"/>
            <property name="forceAnnotation" value="${mapper.forceAnnotation}" />
        </plugin>
        -->

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

        <jdbcConnection driverClass="${jdbc.driverClass}"
                        connectionURL="${jdbc.jdbcUrl}"
                        userId="${jdbc.user}"
                        password="${jdbc.password}">
        </jdbcConnection>

        <javaModelGenerator targetPackage="${targetModelPackage}" targetProject="${targetJavaProject}">
            <!-- 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>

        <sqlMapGenerator
                targetPackage="${targetXMLPackage}"
                targetProject="${targetResourcesProject}">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>

        <javaClientGenerator
                targetPackage="${targetMapperPackage}"
                targetProject="${targetJavaProject}"
                type="XMLMAPPER">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        <!--全部表参与逆向工程-->
        <!--以下example为false，表示不会生成example类，否则将自动生成example类-->
        <table schema="" tableName="%"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>

        <!--指定某些表参与逆向工程-->
        <!--
             <table tableName="user"
             enableCountByExample="false"
             enableUpdateByExample="false"
             enableDeleteByExample="false"
             enableSelectByExample="false"
             selectByExampleQueryId="false">
             </table>
         -->
    </context>
</generatorConfiguration>

5、编写mybatis的配置文件：/resources/mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <typeAliases>
        <!--包名需要自己改-->
        <package name="com.zhixi"/>
    </typeAliases>

</configuration>

6、生成代码