Mybatis-Plus 动态表名的实践

public interface UserMapper extends BaseMapper<User> {
    
    @Select("SELECT * FROM #{tableName}")
    List<User> selectByTableName(@Param("tableName") String tableName);
}

// 在Service层调用
List<User> users = userMapper.selectByTableName("users");

@Select("SELECT * FROM #{T('com.example.entity.' + entityName + '.tableName')} as t")
List<User> selectByEntityName(@Param("entityName") String entityName);

// 调用
List<User> users = userMapper.selectByEntityName("User");

public class CustomSqlInjector implements SqlInjector {

    @Override
    public String injectSql(String sql, Object model) {
        // 根据model对象动态生成表名
        String tableName = getDynamicTableName(model);
        return sql.replace("#{tableName}", tableName);
    }
}

GlobalConfig globalConfig = new GlobalConfig();
globalConfig.setSqlInjector(new CustomSqlInjector());
configuration.setGlobalConfig(globalConfig);

@TableField(exist=false)
private String tableName;

public List<User> selectUsers() {
    TableInfo tableInfo = TableInfoHelper.getTableInfo(this.getClass());
    String dynamicTableName = tableInfo.getTableName();
    // 使用dynamicTableName进行数据库操作
}

@Aspect
@Component
public class DynamicTableNameAspect {

    @Pointcut("@annotation(com.example.DynamicTableName)")
    public void cut() {}

    @Around("cut()")
    public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        Method method = signature.getMethod();
        DynamicTableName annotation = method.getAnnotation(DynamicTableName.class);
        String tableName = annotation.value();
        // 设置动态表名，继续执行原有逻辑
        return joinPoint.proceed();
    }
}