mysql中有一个字段是字符串类型的,category字段值有多个用逗号分割的,例如:娱乐,时尚美妆,美食 。现在想实现这么一个功能, 前端传参 字符串,美食,娱乐。现在想在mybatis的xml中实现,查询,能查到category只要包含美食或者娱乐的数据行。
数据如下示例,category字段中有多个值,country字段中只有一个值
Mybatis xml 查询如下:
XML
<where>
<if test="sex!= null and sex!=''">
and sex= #{sex}
</if>
<if test="country != null and country != ''">
AND country IN
<foreach item="item" index="index" collection="country.split(',')" open="(" separator="," close=")">
#{item}
</foreach>
</if>
<if test="category != null and category != ''">
and
<foreach item="item" index="index" collection="category.split(',')" open="(" separator="OR" close=")">
FIND_IN_SET(#{item}, category) > 0
</foreach>
</if>
</where>
Mybatis-plus中实现:
java
QueryWrapper<对象> lqw = new QueryWrapper<>();
if (StringUtils.isNotEmpty(paramObj.getCountry())) {
String[] split = paramObj.getCountry().split(",");
List<String> countryList = Arrays.asList(split);
lqw.in("country", countryList);
}
if (StringUtils.isNotEmpty(paramObj.getCategory())) {
String[] split = paramObj.getCategory().split(",");
StringBuilder sb = new StringBuilder();
sb.append("(");
for(int i = 0; i< split.length; i++){
String catgory = split[i];
if(i == split.length -1){
sb.append("FIND_IN_SET('" + catgory + "', category) > 0").append(")");
}else{
sb.append("FIND_IN_SET('" + catgory + "', category) > 0").append(" or ");
}
}
lqw.apply(sb.toString());
}