1 項(xiàng)目目錄結(jié)構(gòu) （IDE: Idea）

目錄結(jié)構(gòu)

2 配置Maven插件以及相關(guān)依賴——pom.xml

<!--pom.xml-->
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.vlin</groupId>
    <artifactId>mybatis-generator</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.6</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
                <executions>
                    <execution>
                        <id>Generate MyBatis Artifacts</id>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.2</version>
                    </dependency>

                    <!--視數(shù)據(jù)庫版本而定，可以選擇5.x版本的connector，對(duì)應(yīng)的driver為com.mysql.jdbc.Driver，如需使用該版本，請(qǐng)記得修改dataSource.properties中的driver項(xiàng)。-->
                    <!--此處版本為8.x，對(duì)應(yīng)的driver為com.mysql.cj.jdbc.Driver-->
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.11</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>
</project>

3 配置JDBC參數(shù)——dataSource.properties

#driver版本視數(shù)據(jù)庫版本而定
jdbc.driver=com.mysql.cj.jdbc.Driver
#數(shù)據(jù)庫URL    
jdbc.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
#數(shù)據(jù)庫登錄用戶
jdbc.username=victor
#數(shù)據(jù)庫登錄密碼
jdbc.password=123456789
#定義初始連接數(shù)
initialSize=0
#定義最大連接數(shù)
maxActive=20
#定義最大空閑
maxIdle=20
#定義最小空閑
minIdle=1
#定義最長等待時(shí)間
maxWait=60000

4 配置生成規(guī)則——mybatisConfig.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>

        <!--JDBC相關(guān)配置文件，存放JDBC連接所需要的各個(gè)參數(shù)-->
    <properties  resource="dataSource.properties"/>
    <context  id="mysqlTables"   targetRuntime="MyBatis3">
        <!--JDBC連接配置-->
        <jdbcConnection  driverClass="${jdbc.driver}"
                         connectionURL="${jdbc.url}"  userId="${jdbc.username}"  password="${jdbc.password}"/>
        <!--指定生成的類型為java類型，避免數(shù)據(jù)庫中number等類型字段 -->
        <javaTypeResolver>
            <property name="forceBigDecimals"  value="false"/>
        </javaTypeResolver>

        <!--自動(dòng)生成的實(shí)體的存放包路徑 -->
        <javaModelGenerator  targetPackage="com.vlin.entity"
                             targetProject="src/main/java">
            <property  name="enableSubPackages"  value="true"/>
            <property  name="trimStrings"  value="true"/>
        </javaModelGenerator>

        <!--自動(dòng)生成的*Mapper.xml文件存放路徑 -->
        <sqlMapGenerator  targetPackage="com.vlin.dao.mappers"
                          targetProject="src/main/java">
            <property  name="enableSubPackages"  value="true"/>
        </sqlMapGenerator>

        <!--自動(dòng)生成的*Mapper.java存放路徑 -->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.vlin.dao.mappers"  targetProject="src/main/java">
            <property  name="enableSubPackages"  value="true"/>
        </javaClientGenerator>

        <!--數(shù)據(jù)庫中對(duì)應(yīng)的表，生成的類名，以及配置自動(dòng)生成方法有哪些的參數(shù)-->
        <table  tableName="buyer_info"  domainObjectName="BuyerInfo"
                enableCountByExample="false"   enableUpdateByExample="false"
                enableDeleteByExample="false"  enableSelectByExample="true"
                selectByExampleQueryId="false">
        </table>

        <!--<table  tableName="teacher"   domainObjectName="Tercher">-->
            <!--<generatedKey  column="ID"  sqlStatement="select uuid_short()"   identity="false"/>-->
        <!--</table>-->

    </context>
</generatorConfiguration>

5 運(yùn)行Mybatis Generator生成Maven插件

Mybatis Generator插件

插件運(yùn)行過程

生成的Entity以及Mapper