今天我们在springboot上集成mybatis。首先创建一个maven项目。
添加依赖
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<!--springboot依赖--> <dependency> <groupid>org.springframework.boot<groupi> <artifactid>springbootstarter<artifactid> </dependency> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-web</artifactid> </dependency> <!--测试--> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-test</artifactid> <scope>test</scope> </dependency> <!--集成mybatis--> <dependency> <groupid>org.mybatis.spring.boot</groupid> <artifactid>mybatis-spring-boot-starter<artifactid> <version> 1.3 . 0 </version> </dependency> <dependency> <groupid>mysql</groupid> <artifactid>mysql-connector-java</artifactid> <version> 5.1 . 35 </version> </dependency> |
在src/main/resources/目录下新建一个application.properties配置文件,里面写数据源的配置
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spring.datasource.name=test spring.datasource.url=jdbc:mysql: //127.0.0.1:3306/test spring.datasource.username=root spring.datasource.password=root |
配置文件有两种写法,我们还可以写成yml文件形式,在src/main/resources/目录下新建一个application.yml文件(两种方式选其中一种就可以了)
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spring: datasource: url: jdbc:mysql: //127.0.0.1:3306/test username: root password: root driver- class -name: com.mysql.cj.jdbc.driver |
在本地数据库中创建test数据库,并新建一个表t_user
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create database test; create table `t_user` ( `user_id` int ( 11 ) not null auto_increment, `user_name` varchar( 225 ) not null , `password` varchar( 225 ) not null , `phone` varchar( 225 ) not null , primary key (`user_id`) ) engine=innodb auto_increment= 1000 default charset=utf8 |
这里我们使用mybatis-generator插件,自动生成实体类,mapper,以及mapper.xml文件
在pom中添加build依赖(放在层次外面)
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<build> <resources> <resource> <directory>src/main/resources</directory> <filtering> true </filtering> <excludes> <exclude>generator/**</exclude> </excludes> </resource> </resources> <plugins> <plugin> <groupid>org.mybatis.generator</groupid> <artifactid>mybatis-generator-maven-plugin</artifactid> <version> 1.3 . 4 -snapshot</version> <dependencies> <dependency> <groupid>mysql</groupid> <artifactid>mysql-connector-java</artifactid> <version> 5.1 . 39 </version> </dependency> <dependency> <groupid>org.mybatis.generator</groupid> <artifactid>mybatis-generator-core</artifactid> <version> 1.3 . 4 -snapshot</version> </dependency> </dependencies> <configuration> <overwrite> true </overwrite> <configurationfile>src/main/resources/generator/generatorconfig.xml</configurationfile> </configuration> </plugin> </plugins> </build> |
在src/main/resources/下面新建一个目录generator,在此目录下新建一个generatorconfig.xml文件(注意根据自己的目录,调整路径)
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<?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= "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://127.0.0.1:3306/test" userid= "root" password= "root" > </jdbcconnection> <javatyperesolver> <property name= "forcebigdecimals" value= "false" /> </javatyperesolver> <!--生成model类存放位置--> <javamodelgenerator targetpackage= "com.lw.study.dao.domain" targetproject= "src/main/java" > <property name= "enablesubpackages" value= "true" /> <property name= "trimstrings" value= "true" /> </javamodelgenerator> <!--生成映射文件存放位置--> <sqlmapgenerator targetpackage= "sqlmap" 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.lw.study.dao.mapper" targetproject= "src/main/java" > <property name= "enablesubpackages" value= "true" /> </javaclientgenerator> <!--生成对应表及类名--> <!--<table schema= "loandb" tablename= "t_audit_job" domainobjectname= "auditjob" >--> <!--<property name= "useactualcolumnnames" value= "true" />--> <!--<generatedkey column= "id" sqlstatement= "mysql" identity= "true" />--> <!--</table>--> <table tablename= "t_user" domainobjectname= "user" enablecountbyexample= "false" enableupdatebyexample= "false" enabledeletebyexample= "false" enableselectbyexample= "false" selectbyexamplequeryid= "false" ></table> </context> </generatorconfiguration> |
然后运行generator配置文件。
在点击左上角的➕,选择maven
working derectory选择自己的项目路径。然后apply,在右上角运行就可以了,就会在指定的目录下生成三个文件(实体类,mapper类,和mapper.xml文件)
最后在src/main/java/com/lw/study/目录下新建一个mybatisconfig目录,里面新建两个配置类。
mybatisconfig.java
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@configuration @enabletransactionmanagement public class mybatisconfig { @bean @configurationproperties (prefix = "spring.datasource" ) public datasource datasource(){ return new org.apache.tomcat.jdbc.pool.datasource(); } @bean (name = "sqlsessionfactory" ) public sqlsessionfactory sqlsessionfactorybean() throws exception { sqlsessionfactorybean sqlsessionfactorybean = new sqlsessionfactorybean(); sqlsessionfactorybean.setdatasource(datasource()); pathmatchingresourcepatternresolver resolver = new pathmatchingresourcepatternresolver(); sqlsessionfactorybean.setmapperlocations(resolver.getresources( "classpath:/sqlmap/*.xml" )); return sqlsessionfactorybean.getobject(); } } |
mybatismapperscannerconfig.java
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@configuration @autoconfigureafter (mybatisconfig. class ) public class mybatismapperscannerconfig { @bean public mapperscannerconfigurer mapperscannerconfigurer() { mapperscannerconfigurer mapperscannerconfigurer = new mapperscannerconfigurer(); mapperscannerconfigurer.setsqlsessionfactorybeanname( "sqlsessionfactory" ); mapperscannerconfigurer.setbasepackage( "com.study.dao.mapper" ); return mapperscannerconfigurer; } } |
创建一个springboot的启动类,application.java
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@springbootapplication (scanbasepackages = { "com.lw.study.*" }) @mapperscan ( "com.lw.study.mapper" ) public class application { public static void main(string[] args) { springapplication.run(application. class ,args); } } |
好了,到这里我们在springboot中通过generator插件的方式集成mybatis就完成了。大家可以自己写一个测试类,使用mapper中的方法看能否在数据库中查到数据。
总结
以上所述是小编给大家介绍的创建springboot工程并集成mybatis的方法,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
原文链接:https://blog.csdn.net/Soda_lw/article/details/78980720