IDEA中使用maven创建mybatis的逆向工程

逆向工程(Mybatis Generator)

概念

mybatis Generator 中文官网

mybatis需要程序员自己编写sql语句,mybatis官方提供逆向工程,可以针对单表 自动生成mybatis执行所需要的代码.(mapper.java、mapper.xml、po类)

常采用数据库生成java代码

相关配置文件

这里使用IDEA自带的maven插件配置搭建运行环境,当然,官网提供了更多使用generator的方法,具体可以参考 其他方法.

一、在使用maven之前,有必要贴一下maven插件所必须的setting.xml (默认是在C:\Users\${username}\.m2路径下)

<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd"> <localRepository>E:\Java\Maven\repository</localRepository>
<interactiveMode>true</interactiveMode>
<usePluginRegistry>false</usePluginRegistry>
<offline>false</offline>
<pluginGroups/>
<servers/>
<mirrors>
<mirror>
<id>nexus-aliyun</id>
<mirrorOf>central</mirrorOf>
<name>Nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>
</mirrors>
<proxies/>
<profiles/>
<activeProfiles/>
</settings>

二、接下来,重点是maven 使用的 pom.xml文件：

<?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>club.lemos</groupId>
<artifactId>mybatis-generator</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>

<properties>
<spring.version>4.3.4.RELEASE</spring.version>
<mybatis.version>3.4.1</mybatis.version>
<slf4j.version>1.7.21</slf4j.version>
</properties>

<dependencies>
<!-- mybatis 包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!-- mybatis与spring整合包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<!-- javaee jar包-->
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<!-- mysql 驱动包-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.40</version>
</dependency>
<!--dbcp2-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.1.1</version>
</dependency>
<!-- 日志文件管理包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.7</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.7</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
</dependencies>

<build>
<resources>
<!-- 复制非java文件到class路径下-->
<resource>
<directory>${basedir}/src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
</resource>
<resource>
<directory>${basedir}/src/main/resources</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.5</version>
<!-- 配置generatorConfig.xml的路径和名称 -->
<configuration>
<configurationFile>
${basedir}\src\main\resources\generatorConfig.xml
</configurationFile>
</configuration>
<!-- 配置generator运行插件,使maven执行generator -->
<executions>
<execution>
<id>Generate MyBatis Artifacts</id>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

</project>

三、下面是generator的重要配置文件

该文件在项目中所在的位置：



文件的配置信息：

<?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>
<!-- !!!! Driver Class Path !!!! -->
<classPathEntry location="E:\Java\Maven\repository-taotao\mysql\mysql-connector-java\5.1.40\mysql-connector-java-5.1.40.jar"/>
<context id="context" targetRuntime="MyBatis3">
<!-- 是否去除注释-->
<commentGenerator>
<property name="suppressAllComments" value="true"/>
<property name="suppressDate" value="true"/>
</commentGenerator>
<!-- !!!! Database Configurations !!!! -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/taotao?characterEncoding=UTF8&useSSL=false"
userId="root" password="lemo"/>

<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>

<!-- !!!! Model Configurations !!!! -->
<javaModelGenerator targetPackage="com.taotao.po" targetProject="src/main/java">
<!-- 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>

<!-- !!!! Mapper XML Configurations !!!! -->
<sqlMapGenerator targetPackage="com/taotao/mapping" targetProject="src/main/java">
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>

<!-- !!!! Mapper Interface Configurations !!!! -->
<javaClientGenerator targetPackage="com.taotao.mapper" targetProject="src/main/java" type="XMLMAPPER">
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>

<!-- !!!! Table Configurations !!!! -->
<!-- 指定数据库表 -->
<table schema="" tableName="tb_content"/>
<table schema="" tableName="tb_content_category"/>
<table schema="" tableName="tb_item"/>
<table schema="" tableName="tb_item_cat"/>

</context>
</generatorConfiguration>

四、配置运行maven

首先



然后



最后,尝试运行



如果成功,输出窗口是这样的：



同时,相应的文件夹会生成项目需要的文件.



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