Can not construct instance of xxxxxxxxx : no suitable constructor found

最新推荐文章于 2025-03-08 15:53:15 发布

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本文解释了Jackson在处理自定义构造函数时遇到的问题：当只提供带参数构造函数时，Jackson无法调用它来实例化对象。文章给出了解决方案：显式声明无参数构造函数。

文章目录

- 原因
- 解决

原因

原来Jackson默认会去调用无参数的构造函数，如果自定义了带参数构造函数，Object自带的无参数构造函数就没有了。而且就算提供了带参数构造函数，jackson也无法无歧义地调用带参数构造函数，因为调用参数的顺序无法确定。

解决

解决方法，显式声明一下无参数构造函数就可以了。

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