直接上干货：

例如一个叫xxx的项目，yml文件里加上这段

xxxproject:
    db:
      xxxTable: xxx_dbname #自定义的数据库表名

创一个Configuration类放表名和Mapper

// XxxProjectAutoConfiguration.java

@Configuration
@MapperScan(basePackages = "cn.com.xxxproject.db.mapper")
public class XxxProjectAutoConfiguration {
    
    @Value("${xxxproject.db.xxxTable}")
    private String xxxTable;
    @Autowired
    private XxxMapper xxxMapper;
    
    @Bean
    public DatabaseManager databaseManager() {
        return new DatabaseManager (xxxTable, xxxMapper);
    }
}

看到这聪明的你应该已经知道后续该怎么做了

// DatabaseManager.java

public class DatabaseManager extends AbstractManager<XxxDO> {
    
    private static final String DEFAULT_LOCK_TABLE_NAME = "xxx_dbname";
    
    private final XxxMapper xxxMapper;
    
    private final String localIp;
    
    private final String xxxTable;
    
    public DatabaseLockManager(String xxxTable, XxxMapper xxxMapper) {
        this.xxxMapper = xxxMapper;
        this.localIp = getLocalIp();
        if (StringUtils.isNullOrEmpty(xxxTable)) {
            xxxTable = DEFAULT_LOCK_TABLE_NAME;
        }
        this.xxxTable = xxxTable;
    }

	// 随便写个方法，根据自己需求来定制
	@Override
    protected boolean isExists(Long id) {
        return xxxMapper.isExists(xxxTable, id);
    }

	@Override
    protected XxxDO selectForUpdate(String xxxKey) {
        return xxxMapper.selectForUpdate(xxxTable, xxxKey);
    }
}

<!-- LockMapper.xml -->

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="cn.com.xxxproject.db.mapper.XxxMapper">

</mapper>

// LockMapper.java

@Mapper
public interface LockMapper {
    
    @Select("select * from ${xxxTable} where id = #{id}")
    @Results(id = "XxxMap",
             value = { @Result(property = "id", column = "id"), @Result(property = "xxxKey", column = "xxx_key"),
                 @Result(property = "nodeInfo", column = "node_info"), @Result(property = "count", column = "count"),
                 @Result(property = "version", column = "version"),
                 @Result(property = "createTime", column = "create_time"),
                 @Result(property = "updateTime", column = "update_time") })
    boolean isExists(String xxxTable, Long id);

	@Select("select * from ${xxxTable} where xxx_key= #{xxxKey} for update")
    @ResultMap("XxxMap")
    XxxDO selectForUpdate(String xxxTable, String xxxKey);
}    

完事！

---

顺便放两个关于Mybatis的好文章：

mybatis注解在方法直接编写SQL@Select@Insert@Update@Delete

---

MyBatis框架核心之注解使用@ResultMap及多表查询

第一篇是偏入门操作，第二篇的4.3多表查询真的适合反复细品

本篇用到：结果集映射相关注解

1、通过@Results、@Result注解定义结果集映射
如果实体字段的名称与数据库表字段名称不一致时，我们就需要显式的指定映射关系。这是通过@Results、@Result注解来指定的，例如为UserMapper的selectById指定映射关系：

@Select("SELECT id,name FROM user where id= #{id}")
@Results(id = "userMap", value = {
      @Result(property = "id", column = "id", javaType = Integer.class,jdbcType = JdbcType.INTEGER,id = true),
      @Result(property = "name", column = "name",javaType = String.class,jdbcType = JdbcType.VARCHAR)})
public User selectById(int id);

其中：

@Results注解：id属性用于给这个映射关系起一个名字(这里指定的为userMap)，其内部还包含了一个@Result[]来表示实体属性和数据库表字段的映射关系

@Result注解：property属性是java实体属性的名称，column表示对应的数据库字段的名称。javaType和JdbcType属性可以不指定。

2、通过@ResultMap复用结果集映射
上述方法electById方法已经通过@Results注解指定了结果映射关系，可以通过@ResultMap来引用@Results的id属性值进行复用。如在UserMapper的selectAll方法进行复用：

@Select("SELECT id,name FROM user")
@ResultMap("userMap")
public List<User> selectAll();

THX~