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requestparam

时间: 2023-09-13 18:06:08 浏览: 102

您的问题是什么关于RequestParam的？RequestParam是指在Spring框架中用来获取请求参数的注解，可以用来获取GET和POST方式提交的参数。使用@RequestParam注解可以将请求参数与Controller方法的入参绑定起来，进而进行相应的业务处理。您需要了解RequestParam的具体使用方式吗？

requestParam

@RequestParam和@param都是Spring MVC中用来获取请求参数的注解。 @RequestParam用于获取请求参数，可以指定参数名、是否必须、默认值等属性。 @param用于获取请求头、Cookie等参数，可以指定参数名、是否必须、默认值等属性。两者的区别在于@RequestParam只能获取请求参数，而@param可以获取请求头、Cookie等参数。

RequestParam

@RequestParam is an annotation used in Spring MVC to bind a request parameter to a method parameter in a controller method. It is used to extract a single parameter value from the request URL query string or form data. For example, consider the following URL: "http://localhost:8080/myapp/student?id=123". To extract the value of "id" from the URL, we can use the @RequestParam annotation as follows: ``` @GetMapping("/student") public String getStudent(@RequestParam("id") int id) { // Method implementation } ``` In this example, the @RequestParam annotation is used to extract the value of the "id" parameter from the URL and bind it to the "id" method parameter. The method can then use this value to perform some action, such as retrieving the corresponding student record from a database. The @RequestParam annotation also supports optional parameters, default values, and data type conversion.

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