关于mybatis条件查询 报错：元素内容必须由格式正确的字符数据或标记组成

原查询
select sum(case when age<=16 then 1 else 0 end ) age1,
sum(case when age>16 and age<=25 then 1 else 0 end ) age2,
sum(case when age>25 and age<=35 then 1 else 0 end ) age3,
sum(case when age>35 and age<=45 then 1 else 0 end ) age4,
sum(case when age>45 and age<=55 then 1 else 0 end ) age5,
sum(case when age>55 and age<=65 then 1 else 0 end ) age6,
sum(case when age>65 and age<=75 then 1 else 0 end ) age7,
sum(case when age>75 then 1 else 0 end ) age8,
count(id) other
from snap_face

经检查发现xml格式 <=号无法正确识别
改过之后的查询
select sum(case when age <=16 then 1 else 0 end ) age1,
sum(case when age>16 and age <=25 then 1 else 0 end ) age2,
sum(case when age>25 and age <=35 then 1 else 0 end ) age3,
sum(case when age>35 and age <=45 then 1 else 0 end ) age4,
sum(case when age>45 and age <=55 then 1 else 0 end ) age5,
sum(case when age>55 and age <=65 then 1 else 0 end ) age6,
sum(case when age>65 and age <=75 then 1 else 0 end ) age7,
sum(case when age>75 then 1 else 0 end ) age8,
count(id) other
from snap_face

• 附：XML转义字符

<< 小于号；

>> 大于号；

& & 和 ；

' ‘’单引号；

" “” 双引号；