mybaits generator automatic code generation tools

mybaits generator code generation tool

MyBatis Generator (MBG) is Mybatis a code generator, which can help us (that is, we can design creating means of the corresponding tables in the database entity class, xml Mapper documents, interfaces and helper class to perform simple CRUD operations), thus avoiding the use of each of us to a table of data you need to manually create the corresponding class and xml file, which helped us save a lot of time to develop and business logic related function, but if the United queries and stored procedures you still need handwritten SQL and object.

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The main methods of generating and java Maven Maven embodiment is the following manner

1. pom file added plug-ins

   <build>
           <plugins>
                   <plugin>
                           <groupId>org.mybatis.generator</groupId>
                           <artifactId>mybatis-generator-maven-plugin</artifactId>
                           <version>1.3.7</version>
                           <executions>
                                   <execution>
                                           <id>Generate MyBatis Artifacts</id>
                                           <phase>deploy</phase>
                                           <goals>
                                                   <goal>generate</goal>
                                           </goals>
                                   </execution>
                           </executions>
                           <configuration>
                                   <!-- generator 工具配置文件的位置 -->
                                   <configurationFile>src/main/resources/mybatis-generator/generatorConfig.xml</configurationFile>
                                   <verbose>true</verbose>
                                   <overwrite>true</overwrite>
                           </configuration>
                           <dependencies>
                                   <dependency>
                                           <groupId>mysql</groupId>
                                           <artifactId>mysql-connector-java</artifactId>
                                   </dependency>
                                   <dependency>
                                           <groupId>org.mybatis.generator</groupId>
                                           <artifactId>mybatis-generator-core</artifactId>
                                           <version>1.3.7</version>
                                   </dependency>
                           </dependencies>
                   </plugin>
           </plugins>
   </build>

2. Configure 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">
    <!-- 配置生成器 -->
    <generatorConfiguration>
            <!--执行generator插件生成文件的命令： call mvn mybatis-generator:generate -e -->
            <!-- 引入配置文件 -->
            <properties resource="mybatis-generator/mybatisGeneratorInit.properties"/>
            <!--classPathEntry:数据库的JDBC驱动,换成你自己的驱动位置 可选 -->
            <!--<classPathEntry location="D:\generator_mybatis\mysql-connector-java-5.1.24-bin.jar" /> -->

            <!-- 一个数据库一个context -->
            <!--defaultModelType="flat" 大数据字段，不分表 -->
            <context id="MysqlTables" targetRuntime="MyBatis3Simple" defaultModelType="flat">
                    <!-- 自动识别数据库关键字，默认false，如果设置为true，根据SqlReservedWords中定义的关键字列表；
                    一般保留默认值，遇到数据库关键字（Java关键字），使用columnOverride覆盖 -->
                    <property name="autoDelimitKeywords" value="true" />
                    <!-- 生成的Java文件的编码 -->
                    <property name="javaFileEncoding" value="utf-8" />
                    <!-- beginningDelimiter和endingDelimiter：指明数据库的用于标记数据库对象名的符号，比如ORACLE就是双引号，MYSQL默认是`反引号； -->
                    <property name="beginningDelimiter" value="`" />
                    <property name="endingDelimiter" value="`" />

                    <!-- 格式化java代码 -->
                    <property name="javaFormatter" value="org.mybatis.generator.api.dom.DefaultJavaFormatter"/>
                    <!-- 格式化XML代码 -->
                    <property name="xmlFormatter" value="org.mybatis.generator.api.dom.DefaultXmlFormatter"/>
                    <plugin type="org.mybatis.generator.plugins.SerializablePlugin" />

                    <plugin type="org.mybatis.generator.plugins.ToStringPlugin" />

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

                    <!-- jdbc连接 -->
                    <jdbcConnection driverClass="${jdbc_driver}" connectionURL="${jdbc_url}" userId="${jdbc_user}" password="${jdbc_password}" />
                    <!-- 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>

                    <!-- 生成实体类地址 -->
                    <javaModelGenerator targetPackage="com.cuit.springboot.gentry" targetProject="${project}" >
                            <property name="enableSubPackages" value="false"/>
                            <property name="trimStrings" value="true"/>
                    </javaModelGenerator>
                    <!-- 生成mapxml文件 -->
                    <sqlMapGenerator targetPackage="mappers" targetProject="${resources}" >
                            <property name="enableSubPackages" value="false" />
                    </sqlMapGenerator>
                    <!-- 生成mapxml对应client，也就是接口dao -->
                    <javaClientGenerator targetPackage="com.cuit.springboot.gdao" targetProject="${project}" 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="user" enableCountByExample="true" enableUpdateByExample="true" enableDeleteByExample="true" enableSelectByExample="true" selectByExampleQueryId="true">
                            <property name="useActualColumnNames" value="false" />
                            <!-- 数据库表主键 -->
                            <generatedKey column="id" sqlStatement="Mysql" identity="true" />
                    </table>
            </context>
    </generatorConfiguration>

3. Configure database parameters

#Mybatis Generator configuration
#dao类和实体类的位置
project =src/main/java
#mapper文件的位置
resources=src/main/resources
#根据数据库中的表生成对应的pojo类、dao、mapper
jdbc_driver =com.mysql.jdbc.Driver
jdbc_url=jdbc:mysql://localhost:3306/demo
jdbc_user=root
jdbc_password=123456

Finally, execute the command

    mvn mybatis-generator:generate