如题所述
第1个回答 2016-06-17
错误描述：
[java] view plain copy
@RequestMapping(value = "/index")
public String index(@RequestParam(value = "action", required = false)
String action, @RequestParam(value = "notIncludeTypeId", required = false)
int notIncludeTypeId){
// .... 省略代码
}
当可选参数“notIncludeTypeId”为空时，系统出现如下错误：
[plain] view plain copy
Optional int parameter 'notIncludeTypeId' is not present
but cannot be translated into a null value due to being declared as a primitive type.
Consider declaring it as object wrapper for the corresponding primitive type.
错误原因：
当可选参数“notIncludeTypeId”不存在时，spring默认将其赋值为null，但由于notIncludeTypeId已定于为基本类型int，所以赋值失败！
解决方法：
“Consider declaring it as object wrapper for the corresponding primitive type.”建议使用包装类型代替基本类型，如使用“Integer”代替“int”本回答被网友采纳
[java] view plain copy
@RequestMapping(value = "/index")
public String index(@RequestParam(value = "action", required = false)
String action, @RequestParam(value = "notIncludeTypeId", required = false)
int notIncludeTypeId){
// .... 省略代码
}
当可选参数“notIncludeTypeId”为空时，系统出现如下错误：
[plain] view plain copy
Optional int parameter 'notIncludeTypeId' is not present
but cannot be translated into a null value due to being declared as a primitive type.
Consider declaring it as object wrapper for the corresponding primitive type.
错误原因：
当可选参数“notIncludeTypeId”不存在时，spring默认将其赋值为null，但由于notIncludeTypeId已定于为基本类型int，所以赋值失败！
解决方法：
“Consider declaring it as object wrapper for the corresponding primitive type.”建议使用包装类型代替基本类型，如使用“Integer”代替“int”本回答被网友采纳
