updateCommentCount attempted to return null from a method with a primitive return type (int) - 代码天地

updateCommentCount attempted to return null from a method with a primitive return type (int)

其他 2020-03-01 10:34:46 阅读次数: 0

报错: org.apache.ibatis.binding.BindingException: Mapper method 'com.nowcoder.community.dao.DiscussPostMapper.updateCommentCount attempted to return null from a method with a primitive return type (int).

xml文件中的sql语句写错了, 应该是`<update>`, 错写成了`<select>`

错误的,
在这里插入图片描述
改后的,

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转载自blog.csdn.net/littlehaes/article/details/104367398

updateCommentCount attempted to return null from a method with a primitive return type (int)

attempted to return null from a method with a primitive return type (int)

[mybatis]............attempted to return null from a method with a primitive return type (int).

attempted to return null from a method with a primitive return type (int).

attempted to return null from a method with a primitive return type (int）

attempted to return null from a method with a primitive return type (double)

attempted to return null from a method with a primitive return type (long).

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Mybatis返回int类型为空时报错 attempted to return null from a method with a primitive return type (int）

【java】Mybatis返回int类型为空时报错 attempted to return null from a method with a primitive return type (int）

com.dao.YonghuDao.getYonghu1 attempted to return null from a method with a primitive return type (in

mybatis使用xml实现发生的异常之一return null from a method with a primitive return type (int)

org.apache.ibatis.binding.BindingException: Mapper method 'attempted to return null from a method with a primitive return type (long).

mybatis下返回类型为int，结果为null时报tempted to return null from a method with a primitive return type (int).

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Failed to convert from type [null] to type [int] for value 'null';

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Optional int parameter 'pId' is present but cannot be translated into a null value due to being declared as a primitive type.

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