Resolved [org.springframework.web.bind.MissingServletRequestParameterException: Required request parameter 'id' for method parameter type String is not present]

这个错误是由于在请求中缺少必需的参数 'id' 引起的。当 Spring MVC 控制器方法中的参数类型为 String 且没有找到请求中的 'id' 参数时，就会抛出这个异常。

要解决这个问题，你可以检查调用该接口的请求是否包含了 'id' 参数，并确认参数名是否正确。另外，你还可以考虑将该参数设置为可选的，或者提供默认值来避免这个异常的抛出。

示例代码：

@GetMapping("/example")
public String exampleMethod(@RequestParam(required = false, defaultValue = "defaultId") String id) {
    // 方法体
}

在上面的示例中，将参数 'id' 设置为可选的，并提供了一个默认值。这样，在请求中不包含 'id' 参数时，方法仍然可以正常执行，并使用默认值。

希望能对你有所帮助！如果你还有其他问题，请继续提问。

相关问题

org.springframework.web.bind.MissingServletRequestParameterException: Required request parameter 'id' for method parameter type String is not present

This exception occurs when a required request parameter is missing in the request. In your case, the parameter 'id' is required for the controller method parameter to be resolved, but it is not present in the request.

To resolve this issue, you need to make sure that the request contains the required 'id' parameter. You can also use the `@RequestParam` annotation in the controller method signature to specify that the 'id' parameter is required, like this:

@RequestMapping("/example")
public String exampleMethod(@RequestParam("id") String id) {
    // your code here
}

This will throw a `MissingServletRequestParameterException` if the 'id' parameter is not present in the request. You can also provide a default value or make the parameter optional by using the `defaultValue` and `required` attributes of the `@RequestParam` annotation.

2023-06-09 17:27:48.304 WARN 25488 --- [nio-8080-exec-2] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.bind.MissingServletRequestParameterException: Required request parameter 'id' for method parameter type String is not present]

This warning message indicates that there is a missing request parameter 'id' in a Spring MVC controller method. The parameter is expected to be of type String, but it is not present in the request.

To resolve this issue, you need to ensure that the request contains the required 'id' parameter and that it is of the correct data type. You can also use the `@RequestParam` annotation in the controller method signature to specify that the 'id' parameter is required, like this:

@RequestMapping("/example")
public String exampleMethod(@RequestParam("id") String id) {
    // your code here
}

This will throw a `MissingServletRequestParameterException` if the 'id' parameter is not present in the request.