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Could not set parameters for mapping 和Expected one result (or null) to be returned by selectOne(), b
时间 2021-05-23
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mysql
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mybatis
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MySQL
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今天在练习mybatins的时候,突然思考一个问题。 StudentDao接口中的方法 测试方法 测试方法中字符串里面又加了一个单引号的字符串是我在尝试,这个加不加报错的信息都是一样的 mapper中 报错信息 由前面的运行过程可以看出来,前面都没问题,就是到19行,不能映射到mapper 然后把String name 换成了Integer id 这个id是我这张表的主键。就能成功运行了 此时我又
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