1、引入pom

<dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.0.6</version>
</defendency>

2、配置达梦数据库连接

spring.datasource.driver-class-name = dm.jdbc.driver.DmDriver
spring.datasource.url = jdbc:dm//10.*.*.*:5236?STU&zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf-8&localTimezone=480
spring.datasource.username = username
spring.datasource.password = password

3、数据源配置

@Configuration
@MapperScan(basePackages = {
    "com.puppa.mapper"}, 
    sqlSessionTemplateRef = "mySqlSessionTemplate"
)
public class DataSourceConfig {

    public static final String MAPPER_LOCATION_PATTERN = "classpath:mapper/*.xml";
		
    @Bean
    public DataSourceTransactionManager myTransactionManager (@Autowired DataSource myDataSource) {
        return new DataSourceTransactionManager (myDataSource);
    }
		
    public SqlSessionFactory mySqlSessionFactory (@Autowired DataSource myDataSource) throws Exception {
        MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
        bean.setDataSource(myDataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION_PATTERN));
        // 全局配置
        bean.setGlobalConfig(globalConfig);
        // 配置打印sql语句
        MybatisConfiguration configuration = new MybatisConfiguration();
        configuration.setLogImpl(StdOutImpl.class);

        return bean.getObject();
    }
		
    @Bean
    public SqlSessionTemplate mySqlSessionTemplate(@Qualifier("mySqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
		
    @Bean
    public GlobalConfig globalConfig() {
        GlobalConfig conf = new GlobalConfig();
        GlobalConfig.DbConfig dbConfig = new GlobalConfig.DbConfig();
        dbConfig.setKeyGenerator(new OracleKeyGenerator());
        dbConfig.setIdType(IdType.values()[1]);
        conf.setDbConfig(dbConfig);
        // 全局自动填充配置
        conf.setMetaObjectHandler(new CustomMetaObjectHandler())

        return conf;
    }

}

4、字段全局自动填充配置

/**
* 字段自动填充处理类
*/
public class CustomMetaObjectHandler implements MetaObjectHandler {

    @Override
    public void insertFill(MetaObject metaObject) {
        String currentUserId = getCurrentUserId();
        setValue("addTime", new Date(), metaObject);
        setValue("updateTime", new Date(), metaObject);
        if(StringUtil.isNotEmpty(currentUserId)) {
            setValue("addBy", currentUserId, metaObject);
            setValue("updateBy", currentUserId, metaObject);
        } else {
            setValue("addBy", 0L, metaObject);
            setValue("updateBy", 0L, metaObject);
        }
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        String currentUserId = getCurrentUserId();
        if(StringUtil.isNotEmpty(currentUserId)){
            setValue("updateBy", currentUserId, metaObject);
        } else {
            setValue("updateBy", 0L, metaObject);
        }
        setValue("updateTime", new Date(), metaObject);
    }

    private void setValue(String fieldName, Object value, MetaObject metaObject) {
        Object field = getFieldValByName(fieldName, metaObject);
        if(field == null && value != null) {
            setFieldValByName(fieldName, value, metaObject);
        }
    }

    /**
    * 获取当前登录用户id
    */
    private String getCurrentUserId(){
        RequestAttributes requestAttributes = null;
        try {
            requestAttributes = RequestContextHolder.currentRequestAttributes();
            Object obj = requestAttributes.getAttribute("userId", RequestAttributes.SCOPE_SESSION);
            return obj == null ? "" : obj.toString();
        } catch(Exception ex) {
            return "";
        }
    }
}