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Failed to convert property value of type 'java.util.LinkedHashMap' to required
阅读量:803 次
发布时间:2023-03-21

本文共 531 字,大约阅读时间需要 1 分钟。

在Spring应用中,使用注入Map时常会遇到类型转换问题。最近在项目中遇到一个类似的错误,bean的初始化失败提示“payCallbackHandler”无法创建,原因是“payMerIdParamMap”属性的类型转换失败,具体错误是“yeepay”字符串无法转换为Number。经过排查,问题出在注入的Map类型上。

首先,确认Map的类型是否正确。在Spring中,Map字段通常会被自动检测类型并根据实际使用的泛型进行注入。因此,如果在类中注入Map时没有正确指定类型,可能会导致Spring无法正确识别目标类型,从而引发类型转换错误。

解决方法是手动指定Map的类型。默认情况下,Spring会注入LinkedHashMap,但如果需要其他类型,可以在注入时明确指定。例如,在bean配置文件中可以这样做:

这样可以确保Spring在注入过程中能够正确识别目标类型,避免类型转换异常。因此,在注入Map时,最好明确指定需要的类型,以便Spring能够更好地进行依赖注入。

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