Optional int parameter 'fundID' is present but cannot be translated into a null value due to being declared as a primitive type
错误的意思是: "可选的int参数'fundID'存在但由于被声明为基本类型而无法转换为空值"
意思是fundID被申明为int的基本数据类型, 不能转换为字符串的null值. 难道是在参数调用
的时候, 需要把fundID设置为对象类型吗? 答案是正确的.
@RequestMapping(value = "/fund-purchase")
public String fundPurchase(int fundID) {
Fund fund = fundService.selectFundByID(1);
System.out.println("fund: " + fund);
return null;
}
解决办法: int 改为 Integer,
前端通过url传递过来的数据, 改为对象类型
@RequestMapping(value = "/fund-purchase")
public String fundPurchase(Integer fundID) {
Fund fund = fundService.selectFundByID(1);
System.out.println("fund: " + fund);
return null;
}
问题解决!