Failed to convert from type [java.lang.String] to type [java.lang.Long]

谁借莪１个温暖的怀抱￠ 2022-05-02 21:03 173阅读 0赞

2018-10-29 13:35:33.639 WARN 2212 — \[nio-8080-exec-2\] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved exception caused by handler execution: org.springframework.beans.TypeMismatchException: Failed to convert value of type ‘java.lang.String’ to required type ‘com.elemeHelper.entity.Cookie’; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type \[java.lang.String\] to type \[java.lang.Long\] for value ‘fw’; nested exception is java.lang.NumberFormatException: For input string: “fw”

1.遇到一个这样的问题：  
往后台传一个字符串的值，到后台接收参数时报错  
Failed to convert from type \[java.lang.String\] to type \[java.lang.Long\]；  
大概代码如下

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L215MTM0MTM1MjcyNTk_size_27_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L215MTM0MTM1MjcyNTk_size_27_color_FFFFFF_t_70 1]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L215MTM0MTM1MjcyNTk_size_27_color_FFFFFF_t_70 2]

原因(猜测)：  
传递的是cookie，且接收的是cookie类里面的字段cookie，所以接收时分辨不出来？

解决：  
把cookie类的字段cookie改成其它(value)，前台也传value:xxx ,就可以…

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