Spring Boot整合mybatis并自动生成mapper和实体实例解析

<dependencies>  <dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-web</artifactId>  </dependency>  <dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-test</artifactId>   <scope>test</scope>  </dependency>  <dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-jdbc</artifactId>  </dependency>  <dependency>   <groupId>mysql</groupId>   <artifactId>mysql-connector-java</artifactId>   <scope>runtime</scope>  </dependency>  <dependency>   <groupId>com.alibaba</groupId>   <artifactId>druid</artifactId>   <version>1.0.29</version>  </dependency>  <dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-data-jpa</artifactId>  </dependency> <!-- 这个是官方的mybatis依赖，这个你不加没法用噻 -->  <dependency>   <groupId>org.mybatis.spring.boot</groupId>   <artifactId>mybatis-spring-boot-starter</artifactId>   <version>1.3.2</version>  </dependency>  <!-- 这个是自动生成mapper等的依赖，必须得加-->  <dependency>   <groupId>org.mybatis.generator</groupId>   <artifactId>mybatis-generator</artifactId>   <version>1.3.5</version>   <type>pom</type>  </dependency>  <!--这个是自动生成mapper等的依赖，必须得加 https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->  <dependency>   <groupId>org.mybatis.generator</groupId>   <artifactId>mybatis-generator-core</artifactId>   <version>1.3.5</version>  </dependency>  </dependencies> <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>1.3.2</version>    <configuration>     <!--配置文件存放的地址-->     <!--<configurationFile>src/main/resources/mybatis-generator/generatorConfig.xml</configurationFile>-->     <verbose>true</verbose>     <overwrite>true</overwrite>    </configuration>   </plugin>  </plugins> </build>

spring.datasource.driver-class-name=com.mysql.jdbc.Driverspring.datasource.url=jdbc:mysql://localhost:3306/yddy?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTCspring.datasource.username=rootspring.datasource.password=123456mybatis.config-locations=classpath:mybatis-config.xml# mapper文件mybatis.mapper-locations=classpath:mapper/*.xml #这里直接写*，对后面自定义sql，编写xxxExt.xml有好处，自动扫描到这些文件，不用再改配置了mybatis.type-aliases-package=com.dameiweb.learn.modellogging.level.com.dameiweb.learn.dao=debug#mybatis.config = mybatis 配置文件名称#mybatis.mapperLocations = mapper xml 文件地址#mybatis.typeAliasesPackage = 实体类包路径#mybatis.typeHandlersPackage = type handlers 处理器包路径#mybatis.check-config-location = 检查 mybatis 配置是否存在，一般命名为 mybatis-config.xml#mybatis.executorType = 执行模式。默认是 SIMPLE

<?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> <classPathEntry location="C:/Users/nick/.m2/repository/mysql/mysql-connector-java/5.1.46/mysql-connector-java-5.1.46.jar"/> <context id="DB2Tables" targetRuntime="MyBatis3">  <commentGenerator>   <property name="suppressDate" value="true"/>   <property name="suppressAllComments" value="true"/>  </commentGenerator>  <!--数据库链接地址账号密码-->  <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/yddy?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC" userId="root" password="123456">  </jdbcConnection>  <javaTypeResolver>   <property name="forceBigDecimals" value="false"/>  </javaTypeResolver>  <!--生成Model类存放位置-->  <javaModelGenerator targetPackage="com.dameiweb.learn.model" targetProject="src/main/java">   <property name="enableSubPackages" value="true"/>   <!-- 从数据库返回的值被清理前后的空格 -->   <property name="trimStrings" value="false"/>  </javaModelGenerator>  <!--生成映射文件存放位置-->  <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">   <property name="enableSubPackages" value="true"/>  </sqlMapGenerator>  <!--生成Dao类存放位置-->  <!-- 客户端代码，生成易于使用的针对Model对象和XML配置文件 的代码    type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象    type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象    type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口  -->  <javaClientGenerator type="XMLMAPPER" targetPackage="com.dameiweb.learn.dao" targetProject="src/main/java">   <property name="enableSubPackages" value="true"/>  </javaClientGenerator> </context></generatorConfiguration>

<?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> <settings>  <setting name="callSettersOnNulls" value="true"/>  <setting name="cacheEnabled" value="true"/>  <setting name="lazyLoadingEnabled" value="true"/>  <setting name="aggressiveLazyLoading" value="true"/>  <setting name="multipleResultSetsEnabled" value="true"/>  <setting name="useColumnLabel" value="true"/>  <setting name="useGeneratedKeys" value="false"/>  <setting name="autoMappingBehavior" value="PARTIAL"/>  <setting name="defaultExecutorType" value="SIMPLE"/>  <setting name="mapUnderscoreToCamelCase" value="true"/>  <setting name="localCacheScope" value="SESSION"/>  <setting name="jdbcTypeForNull" value="NULL"/> </settings> <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>

<!--生成对应表及类名-->  <table tableName="yd_movies" domainObjectName="Movie" enableCountByExample="false" enableUpdateByExample="false"    enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false">   <columnOverride column="cover_photos" javaType="java.lang.String" jdbcType="VARCHAR" />   <columnOverride column="cover_photos_loc" javaType="java.lang.String" jdbcType="VARCHAR" />   <columnOverride column="pubdates" javaType="java.lang.String" jdbcType="VARCHAR" />   <columnOverride column="photographs_origin" javaType="java.lang.String" jdbcType="VARCHAR" />   <columnOverride column="photographs_origin_loc" javaType="java.lang.String" jdbcType="VARCHAR" />   <columnOverride column="languages" javaType="java.lang.String" jdbcType="VARCHAR" />   <columnOverride column="awards" javaType="java.lang.String" jdbcType="VARCHAR" />   <columnOverride column="summary" javaType="java.lang.String" jdbcType="VARCHAR" />  </table><!--columnOverride使用这个标签是为了防止数据库字段类型为text时候，mybatis会生成xxxxWithBLOBs文件。-->

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" ><mapper namespace="com.dameiweb.learn.dao.MovieMapper" > <select id="selectByCondition" resultMap="BaseResultMap" parameterType="com.dameiweb.learn.dto.MovieRequest"> SELECT yd_movies.* FROM yd_movies LEFT JOIN yd_r_movie_countries ON yd_movies.id = yd_r_movie_countries.movie_id LEFT JOIN yd_countries cou ON yd_r_movie_countries.country_id = cou.id LEFT JOIN yd_r_movie_category ON yd_movies.id = yd_r_movie_category.movie_id LEFT JOIN yd_category cat ON yd_r_movie_category.category_id = cat.id LEFT JOIN yd_r_movie_actor ON yd_movies.id = yd_r_movie_actor.movie_id LEFT JOIN yd_actors a ON yd_r_movie_actor.actor_id = a.id WHERE yd_movies.status = 1 <if test="movieRequest.title != null">  AND yd_movies.title LIKE "%"#{movieRequest.title}"%" </if> <if test="movieRequest.country != null">  AND cou.id = #{movieRequest.country} </if> <if test="movieRequest.category != null">  AND cat.id = #{movieRequest.category} </if> <if test="movieRequest.year != null">  AND year = #{movieRequest.year} </if> <if test="movieRequest.rate != null">  AND rate >= #{movieRequest.rate} </if> <if test="movieRequest.rate != null">  AND rate < (#{movieRequest.rate}+1) </if> <if test="movieRequest.subtype != null">  AND yd_movies.subtype = #{movieRequest.subtype} </if> GROUP BY yd_movies.id ORDER BY updated_at DESC, year </select></mapper>