Java JdbcTemplate queryForList 在没有结果的情况下返回值
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JdbcTemplate queryForList return value in case of no results
提问by Reins
The question is pretty much summed up in the title. What will JdbcTemplate.queryForList() return when the query returns no results. Will it return an empty List or null value? I couldn't find a definitive answer from the documentation. Thanks in advance!
这个问题几乎总结在标题中。当查询没有返回结果时 JdbcTemplate.queryForList() 将返回什么。它会返回一个空列表或空值吗？我无法从文档中找到明确的答案。提前致谢！
采纳答案by Stephane Nicoll
The javadoc states that it will return
javadoc 声明它将返回
a List of objects that match the specified element type
If there's no element, the list is empty.
如果没有元素，则列表为空。
回答by Sachin Kumar
It will return an empty list. So you can test it with list.isEmpty(). It will return true in this case.
它将返回一个空列表。所以你可以用list.isEmpty(). 在这种情况下它将返回 true。
