Maven配置mybatis-generator插件自动生成映射文件

首先在依赖中加入依赖包：

        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>

然后加入在< build >节点的< plugins >里面加入一个< plugin >：

            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <executions>
                    <execution>
                        <id>Generate MyBatis Files</id>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                        <phase>generate</phase>
                        <configuration>
                            <verbose>true</verbose>
                            <overwrite>true</overwrite>
                        </configuration>
                    </execution>
                </executions>

                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.38</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.5</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mybatis</groupId>
                        <artifactId>mybatis</artifactId>
                        <version>3.4.2</version>
                    </dependency>
                </dependencies>

            </plugin>

最后在配置mybatis-generator的配置文件generatorConfig.xml放在resources目录下（默认配置，可修改）：

<?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>
    <context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <!--<plugin type="tk.mybatis.mapper.generator.MapperPlugin">-->
        <!--<property name="mappers" value="tk.mybatis.mapper.common.Mapper"/>-->
        <!--&lt;!&ndash; caseSensitive默认false，当数据库表名区分大小写时，可以将该属性设置为true &ndash;&gt;-->
        <!--<property name="caseSensitive" value="true"/>-->
        <!--</plugin>-->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="url" --数据库连接url
                        userId="username"  --数据库用户名
                        password="password"> --数据库密码
        </jdbcConnection>

        <!--自动生成的实体的存放包路径 -->
         <!--targetpackage为生成类的包路径， targetProject为文件存放路径在项目中的位置-->
        <javaModelGenerator  targetPackage="com.wk.entity.po"  targetProject="src/main/java/">
            <property  name="enableSubPackages"  value="true"/>
            <property  name="trimStrings"  value="true"/>
        </javaModelGenerator>

        <!--自动生成的*Mapper.xml文件存放路径 -->
        <sqlMapGenerator  targetPackage="mybatis-mapper" targetProject="src/main/resources/">
            <property  name="enableSubPackages"  value="true"/>
        </sqlMapGenerator>

        <!--自动生成的*Mapper.java存放路径 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.wk.entity.dao"  targetProject="src/main/java/">
            <property  name="enableSubPackages"  value="true"/>
        </javaClientGenerator>
        <!-- 要生成的表 -->
        <!-- 这里的百分号代表对该数据库中所有的表进行生成 -->
        <table tableName="a_innodb_test">
            <generatedKey column="id" sqlStatement="Mysql" identity="true"/>
        </table>
    </context>
</generatorConfiguration>