首页 > 开发 > Java > 正文

创建SpringBoot工程并集成Mybatis的方法

2024-07-14 08:41:22
字体:
来源:转载
供稿:网友

今天我们在springboot上集成mybatis。首先创建一个maven项目。

添加依赖

<!--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

spring.datasource.name=testspring.datasource.url=jdbc:mysql://127.0.0.1:3306/testspring.datasource.username=rootspring.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)

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

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)

<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)

<?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

@Configuration@EnableTransactionManagementpublic 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

@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

@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VeVb武林网网站的支持!


注:相关教程知识阅读请移步到JAVA教程频道。
发表评论 共有条评论
用户名: 密码:
验证码: 匿名发表