sprigBoot集成之集成mybatis框架

本是古典何须时尚 2023-08-17 17:49 157阅读 0赞

### sprigBoot集成之集成mybatis框架 ###

--------------------

**3、集成mybatis框架**  
官网：[http://mybatis.org/spring/zh/][http_mybatis.org_spring_zh]  
集成springboot插件： [http://mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/][http_mybatis.org_spring-boot-starter_mybatis-spring-boot-autoconfigure]  
3.1 添加依赖

<dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.0</version>
        </dependency>
        
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.48</version>
        </dependency>

3.2 添加配置  
 3.2.1 添加mybatis配置

*  自动注入数据源
 *  创建sqlSessionFactory
 *  配置model类的别名
 *  解析映射文件 PathMatchingResourcePatterResolver获取Mapper文件的路径

import javax.sql.DataSource;
    //mybatis的配置
    @Configuration
    @MapperScan("com.kp.myboot.**.dao")//扫描com.kp.myboot包下任意子包的中的dao的包 扫描映射文件和接口
    public class MybatisConfig { 
        @Autowired
        DataSource dataSource;
        @Bean
        public SqlSessionFactory sqlSessionFactory () throws Exception{ 
            //使用SqlSessionFactoryBean 管理数据源
            SqlSessionFactoryBean sqlSessonFactory = new SqlSessionFactoryBean();
            sqlSessonFactory.setDataSource(dataSource);
            //设置别名包
            sqlSessonFactory.setTypeAliasesPackage("com.kp.myboot.**.model");//扫描model
    
            PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
            // 设置映射文件所在的路径
            sqlSessonFactory.setMapperLocations(resolver.getResources("classpath*:**/sqlmap/*.xml"));
    
            return sqlSessonFactory.getObject();
        }
    }

3.2.2 添加数据源

#添加数据源
    		spring.datasource.driver-class-name=com.mysql.jdbc.Driver
    		spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test1212?characterEncoding=utf-8
    		spring.datasource.username=root
    		spring.datasource.password=root

3.2.3 修改启动类

@SpringBootApplication(scanBasePackages = { "com.kp.myboot"})//默认设置也是扫描该包下子包
    	public class MybootApplication { 
    	 public static void main(String[] args) { 
    		SpringApplication.run(MybootApplication.class, args);
    			    }
    			}

3.3 生成mybatis模块  
参考官网：  
[http://mybatis.org/generator/][http_mybatis.org_generator]  
[https://mp.baomidou.com/][https_mp.baomidou.com]  
3.3.1 添加自动生成代码的插件依赖

<plugins>
        
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.7</version>
            <dependencies>
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>5.1.48</version>
                </dependency>
            </dependencies>
        </plugin>
     </plugins>

3.3.2 修改自动生成代码的配置和mabatis的配置一致  
3.4 编写服务类  
3.4.1 在生成的代码中Mapper接口中，添加一个findAll的方法，并且提供sql语句  
3.5.1 编写服务接口和实现类

@Service
    			public class AutoCodeServiceImpl implements AutoCodeService { 
    	
    			    @Autowired
    			    private AutoCodeMapper autoCodeMapper;
    	
    			    @Override
    			    public List<AutoCode> findAll() { 
    			        return autoCodeMapper.findAll();
    			    }
    			}

3.5.2 编写控制器，在接口文档中测试

@RestController
    			public class AutoCodeController { 
    			    @Autowired
    			    private AutoCodeService autoCodeService;
    	
    			    @RequestMapping("/findAll")
    			    public Object findAll(){ 
    			        return autoCodeService.findAll();
    			    }
    			}

3.5 配置打包资源  
如果打包没有拷贝资源文件，设置pom文件

<resources>
    	        <resource>
    	            <directory>src/main/java</directory>
    	            <includes>
    	                <include>**/sqlmap/*.xml</include>
    	            </includes>
    	            <filtering>false</filtering>
    	        </resource>
    	        <resource>  
    	            <directory>src/main/resources</directory>  
    	                <includes> 
    	                    <include>**/*.*</include>  
    	                </includes> 
    	                <filtering>true</filtering>  
    	        </resource> 
    	    </resources>

3.6 编译运行测试  
http://localhost/findAll  
3.7 声明式事务  
配置类添加

@SpringBootApplication
    @EnableTransactionManagement //如果mybatis中service实现类中加入事务注解，需要此处添加该注解service方法添加开启事务
    @Transactional(propagation = Propagation.REQUIRED,isolation = Isolation.DEFAULT,timeout=36000,rollbackFor=Exception.class)

[http_mybatis.org_spring_zh]: http://mybatis.org/spring/zh/
[http_mybatis.org_spring-boot-starter_mybatis-spring-boot-autoconfigure]: http://mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/
[http_mybatis.org_generator]: http://mybatis.org/generator/
[https_mp.baomidou.com]: https://mp.baomidou.com/