Simplified configuration and content sublimation of spring boot and spring mvc.

How to integrate mybatis in spring boot?

Part 1: maven dependency (you can check it when creating the spring boot project)

<dependency>
	<groupId>org.mybatis.spring.boot</groupId>
	<artifactId>mybatis-spring-boot-starter</artifactId>
	<version>2.0.1</version>
</dependency>

Part 2: configure mybatis in application.yml

mybatis:
  type-aliases-package: com.example.demo.entity
  mapper-locations: classpath:mapper/*.xml

Yes, that's how simple it is to complete the configuration. By now, mybatis has completely abandoned its own core configuration file.

Part 2: mybatis has an enhanced framework, mybatis plus, which we can integrate.

The first one, of course, is to add dependency

<!--Mybatis-Plus-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus</artifactId>
    <version>2.2.0</version>
 </dependency>

Then use @ Configuration to add Configuration

@Configuration
@EnableConfigurationProperties(MybatisProperties.class)
public class MyBatisPulsConfig {

	@Autowired
	private DataSource dataSource;
	
	@Autowired
	private MybatisProperties properties;
	
	@Autowired
	@SuppressWarnings("unused")
	private ResourceLoader resourceLoader = new DefaultResourceLoader();
	
	@Autowired(required = false)
	private Interceptor[] interceptors;
	
	@Autowired(required = false)
    private DatabaseIdProvider databaseIdProvider;
	
	@Bean
	public PaginationInterceptor paginationInterceptor() {
		PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
		paginationInterceptor.setDialectType("mysql");
		return paginationInterceptor;
	}
	
	@Bean
	public MybatisSqlSessionFactoryBean mybatisSqlSessionFactoryBean() throws IOException{
		MybatisSqlSessionFactoryBean mybatisPuls = new  MybatisSqlSessionFactoryBean();
		
		mybatisPuls.setDataSource(dataSource); // set up data sources
		mybatisPuls.setVfs(SpringBootVFS.class);
		
		// Use pathmatchingresourcepratternresolver to avoid path not found
		PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
		mybatisPuls.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));
		
		if(StringUtils.hasText(this.properties.getConfigLocation()));
		if(!ObjectUtils.isEmpty(this.interceptors)) {
			mybatisPuls.setPlugins(this.interceptors);
		}
		
		GlobalConfiguration  globalConfig = new GlobalConfiguration();
		globalConfig.setDbType(DBType.MYSQL.name());	//Set database type
		//Use ID work STR, because the front and back ends are separated and use shaping, the front JS will lose precision
		globalConfig.setIdType(IdType.ID_WORKER_STR.getKey());
		globalConfig.setSqlInjector(new AutoSqlInjector());
		MybatisConfiguration mc = new MybatisConfiguration();
		 // For a fully customized mapper, you need to add this configuration to realize underline to hump
		mc.setMapUnderscoreToCamelCase(true);
		mc.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class);
		
		mybatisPuls.setConfiguration(mc);
		
		if(this.databaseIdProvider != null) {
			mybatisPuls.setDatabaseIdProvider(this.databaseIdProvider);
		}
		if(StringUtils.hasLength(this.properties.getTypeAliasesPackage())) {
			mybatisPuls.setTypeAliasesPackage(this.properties.getTypeAliasesPackage());
		}
		if(StringUtils.hasLength(this.properties.getTypeHandlersPackage())) {
			mybatisPuls.setTypeHandlersPackage(this.properties.getTypeHandlersPackage());
		}
		if(!ObjectUtils.isEmpty(this.properties.resolveMapperLocations())) {
			mybatisPuls.setMapperLocations(this.properties.resolveMapperLocations());
		}
		return mybatisPuls;
	}
	
}