@RequestParam和@RequestMapping之间的差异 [英] diffrence between @RequestParam and @RequestMapping

问题描述

第1行:

public ModelAndView viewCustomerDetails(@RequestParam("custId") Integer customerId, @RequestParam("categoryName") String categoryName, HttpServletRequest request) throws BusinessException{

第2行:

public ModelAndView viewCustomerDetails(@RequestMapping("custId") Integer customerId, @RequestMapping("categoryName") String categoryName, HttpServletRequest request) throws BusinessException{

我正在仔细检查我的项目代码，有时我发现 @RequestParam 时对 @RequestParam 和 @RequestMapping 感到困惑 @RequestMapping .以我的理解，两者都会将 custId 的值分配给 customerId 数据成员.

i am going thorough my project code and having some confusion in @RequestParam and @RequestMapping some times i found @RequestParam and some times @RequestMapping. in my understanding both will assign the value of custId to customerId data member.

我的jsp文件的一部分:

some part of my jsp file:

<form:input mandatory="true" id="CustNameTxt" path="custName" cssClass="txtfield controlWidth" readonly="false" />

为了更好地理解我的问题，我在Line2中进行了编辑

for better understanding of my problem i have done editting in Line2

推荐答案

您将苹果与梨进行比较.这两个注释没有什么共同之处，只是这是Spring MVC注释，并且您对 @RequestMapping("categoryName")的使用是错误！

You compare apples with pears. Both annotations have nothing in common except that this are Spring MVC annotations, and your usage of @RequestMapping("categoryName") is wrong!

• @RequestMapping 是用于将请求url映射到java方法的类或方法注释.
• @RequestParam 是(方法)字段注释，用于将请求参数绑定到方法参数

• @RequestMapping is an class or method annotation to map the request url to the java method.
• @RequestParam is a (Method) field annotation to to bind a request parameter to an method parameter

也许您将 @RequestMapping 与 @PathVariable 混搭了，您的问题是关于 @RequestParam 和的区别@PathVariable -然后查看此 answer .

Maybe you mashed @RequestMapping with @PathVariable, and your question is about the difference of @RequestParam and @PathVariable - then have a look at this answer.

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