Mysql字段和java实体类属性类型匹配方式

时间：2022-01-04 10:56:25|栏目：JAVA代码|点击：次

Mysql字段和java实体类属性类型匹配

参见下图：

数据库字段转实体类字段

DROP FUNCTION IF EXISTS f_spiltStr;
CREATE FUNCTION `f_spiltStr`(DATA1 varchar(50)) RETURNS varchar(1000) CHARSET utf8
BEGIN  
      SET @length = LENGTH(DATA1) - LENGTH(REPLACE(DATA1,'_',''));  
      SET @i = 1;  
            set @result  = '';
      WHILE @i<@length+1
        DO  
          set @i = @i + 1;  
          SET @val=SUBSTRING_INDEX(SUBSTRING_INDEX(DATA1,'_',@i),'_',-1); 
                  set @val = CONCAT(upper(left(@val,1)),substring(@val,2));
          set @result =  CONCAT(@result,@val);
            END WHILE;  
        set @result =   CONCAT(SUBSTRING_INDEX(DATA1,'_',1),@result);
  RETURN @result;
END

select 
'private',
case DATA_TYPE
when 'bigint' then 'Integer'
when 'int' then 'Integer'
when 'varchar' then 'String'
when 'decimal' then 'BigDecimal'
when 'datetime' then 'Date'
when 'timestamp' then 'Date'
end,
CONCAT(f_spiltStr( COLUMN_NAME),';'),CONCAT('//',COLUMN_COMMENT)
from information_schema.columns where table_schema='flint_shop' and table_name='sys_menu'