Java SpringBoot 整合Mybatis实现自动生成代码

注意:创建SpringBoot工程项目引入Mybatis，并在com.hello.springboot分支下创建dao，entity目录，resources分支下创建mybatis.mapper

mybatis目录下创建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>
    <typeAliases>
        <typeAlias alias="Integer" type="java.lang.Integer"/>
        <typeAlias alias="Long" type="java.lang.Long"/>
        <typeAlias alias="HashMap" type="java.util.HashMap"/>
        <typeAlias alias="LinkedHashMap" type="java.util.LinkedHashMap"/>
        <typeAlias alias="ArrayList" type="java.util.ArrayList"/>
        <typeAlias alias="LinkedList" type="java.util.LinkedList"/>
    </typeAliases>
</configuration>

pom.xml 需要加入build标签

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>

        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.7</version>
            <dependencies>
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>8.0.12</version>
                </dependency>
                <dependency>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-core</artifactId>
                    <version>1.3.7</version>
                </dependency>
            </dependencies>
            <executions>
                <execution>
                    <id>Generate MyBatis Artifacts</id>
                    <phase>package</phase>
                    <goals>
                        <goal>generate</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <!--允许移动生成的文件 -->
                <verbose>true</verbose>
                <!-- 是否覆盖 -->
                <overwrite>true</overwrite>
                <!-- 自动生成的配置 指定配置文件位置-->
                <configurationFile>generatorConfig.xml</configurationFile>
            </configuration>
        </plugin>

    </plugins>
</build>

application.properties 需要配置MySQL信息

# MyBatis 配置
spring.datasource.url=jdbc:mysql://127.0.0.1:3309/workstations?serverTimezone=UTC&useSSL=false&allowPublicKeyRetrieval=true
spring.datasource.username=root
spring.datasource.password=1111
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
mybatis.type-aliases-package=com.hello.springboot.mapper
mybatis.config-locations=classpath:mybatis/mybatis-config.xml
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml

#生成mapxml对应client，也就是接口dao
mtbatis-generator.dao=com.example.demo.dao
#生成Model类存放位置
mtbatis-generator.entity=com.example.demo.entity

generatorConfig.xml 文件配置

<?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>
    <!--加载配置文件，为下面读取数据库信息准备-->
    <properties resource="application.properties"/>

    <!--defaultModelType="flat" 大数据字段，不分表 -->
    <context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <property name="autoDelimitKeywords" value="true" />
        <property name="beginningDelimiter" value="`" />
        <property name="endingDelimiter" value="`" />
        <property name="javaFileEncoding" value="utf-8" />
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin" />
        <plugin type="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin" />
        <plugin type="org.mybatis.generator.plugins.ToStringPlugin" />

        <!-- 注释 -->
        <commentGenerator >
            <property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
            <property name="suppressDate" value="true" /> <!-- 是否生成注释代时间戳-->
        </commentGenerator>

        <!--数据库链接地址账号密码-->
        <jdbcConnection driverClass="${spring.datasource.driver-class-name}"
                        connectionURL="${spring.datasource.url}"
                        userId="${spring.datasource.username}"
                        password="${spring.datasource.password}">
        </jdbcConnection>

        <!-- 类型转换 -->
        <javaTypeResolver>
            <!-- 是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） -->
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!--生成Model类存放位置-->
        <javaModelGenerator targetPackage="${mtbatis-generator.entity}" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- 生成mapxml文件 -->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources/mybatis" >
            <property name="enableSubPackages" value="false" />
        </sqlMapGenerator>

        <!-- 生成mapxml对应client，也就是接口dao -->
        <javaClientGenerator targetPackage="${mtbatis-generator.dao}" targetProject="src/main/java" type="XMLMAPPER" >
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>
        <!-- table可以有多个,每个数据库中的表都可以写一个table，tableName表示要匹配的数据库表,也可以在tableName属性中通过使用%通配符来匹配所有数据库表,只有匹配的表才会自动生成文件 -->
        <table tableName="data_user"
               enableCountByExample="true"
               enableUpdateByExample="true"
               enableDeleteByExample="true"
               enableSelectByExample="true"
               selectByExampleQueryId="true">
            <generatedKey column="ID"
                          sqlStatement="Mysql"
                          identity="true" />
        </table>

    </context>
</generatorConfiguration>

打开Maven双击运行mtbatis-generator:generate插件即可

输出BUILD SUCCESS便是成功

网络资源仅限收藏 方便学习