org.apache.ibatis.builder.BuilderException: The expression 'list' evaluated to a null value

今天使用MyBatis3 编写批量更新接口提示如下错误信息：org.apache.ibatis.builder.BuilderException: The expression 'array' evaluated to a null value.

错误代码：

<if test="archSids != null"> 
		 	and arch_sid in 
		 	<foreach collection="list" item="item" open="(" separator="," close=")"> 
       			#{item} 
      	 	</foreach> 
      	 </if>

正确代码：

		<if test="archSids != null"> 
		 	and arch_sid in 
		 	<foreach collection="archSids" item="archSids" open="(" separator="," close=")"> 
       			#{archSids} 
      	 	</foreach> 
      	 </if>

service 调用mapper 接口：

	paramter.put("archSids", archSids); 
			List<Map<String, Long>> statistics = fileMapper.getStatistics(paramter);

结论：传参和接收参数不匹配，导致如上所述的错误信息