Mybatis 传输List的实现代码

1. 当查询的参数只有一个时

findbyids(list<long> ids)

 1.1 如果参数的类型是list, 则在使用时，collection属性要必须指定为 list

xml代码

<select id="findbyidsmap" resultmap="baseresultmap"> 
 select 
 <include refid="base_column_list" /> 
 from jria where id in 
 <foreach item="item" index="index" collection="list" open="(" separator="," close=")"> 
 #{item} 
 </foreach> 
</select> 
<select id="findbyidsmap" resultmap="baseresultmap"> 
 select 
 <include refid="base_column_list" /> 
 from jria where id in 
 <foreach item="item" index="index" collection="list" open="(" separator="," close=")"> 
 #{item} 
 </foreach> 
</select> 
 findbyids(long[] ids)

 1.2 如果参数的类型是array,则在使用时，collection属性要必须指定为 array

xml代码

<select id="findbyidsmap" resultmap="baseresultmap"> 
select 
<include refid="base_column_list" /> 
from tabs where id in 
<foreach item="item" index="index" collection="array" open="(" separator="," close=")"> 
 #{item} 
</foreach> 
  </select> 
<select id="findbyidsmap" resultmap="baseresultmap"> 
select 
<include refid="base_column_list" /> 
from tabs where id in 
<foreach item="item" index="index" collection="array" open="(" separator="," close=")"> 
 #{item} 
</foreach> 
  </select> 

2. 当查询的参数有多个时,例如 findbyids(string name, long[] ids)

 这种情况需要特别注意，在传参数时，一定要改用map方式, 这样在collection属性可以指定名称

         下面是一个示例     

map<string, object> params = new hashmap<string, object>(2);
     params.put("name", name);
     params.put("ids", ids);
    mapper.findbyidsmap(params);

xml代码

<select id="findbyidsmap" resultmap="baseresultmap"> 
 select 
 <include refid="base_column_list" /> 
 from tabs where id in 
 <foreach item="item" index="index" collection="ids" open="(" separator="," close=")"> 
 #{item} 
 </foreach> 
</select> 

总结

以上所述是小编给大家介绍的mybtis 传输list的实现代码，希望对大家有所帮助