1. 当查询的参数只有一个时
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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
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<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
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<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
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Map<String, Object> params = new HashMap<String, Object>( 2 ); params.put( "name" , name); params.put( "ids" , ids); mapper.findByIdsMap(params); |
Xml代码
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<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,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
原文链接:http://blog.csdn.net/starkpan/article/details/77870448