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Javascript 通过ajax发送变量时获取exeption_Javascript_Jquery_Ajax_Spring Mvc - Fatal编程技术网

Javascript 通过ajax发送变量时获取exeption

Javascript 通过ajax发送变量时获取exeption,javascript,jquery,ajax,spring-mvc,Javascript,Jquery,Ajax,Spring Mvc,尝试从数据库中删除用户时出错。 以下是我编写的代码: 这是服务器端: @RestController public class EmployeeRestController { @DeleteMapping( value = "/delete_user") public List<Employee> deleteEmployee(@RequestParam(value = "id") Integer id) { em

尝试从数据库中删除用户时出错。 以下是我编写的代码: 这是服务器端:

@RestController
public class EmployeeRestController {

   @DeleteMapping( value = "/delete_user")
   public List<Employee> deleteEmployee(@RequestParam(value = "id") Integer id) {
       employeeService.deleteEmployee(id);
       List<Employee> list = employeeService.getAllEmployees();
       return list;
   }
 }
来自服务器端的错误:

DefaultHandlerExceptionResolver[0;39m [2m:[0;39m Resolved [org.springframework.web.bind.MissingServletRequestParameterException: Required Integer parameter 'id' is not present]
客户端的错误代码是400


我不擅长ajax、javascript和spring。很抱歉,如果问题很明显,请提前感谢。

尝试使用PathVariable而不是RequestParam

    @DeleteMapping(value = "/delete_user/{id}")
   public List<Employee> deleteEmployee(@PathVariable("id") Integer id) {
       employeeService.deleteEmployee(id);
       List<Employee> list = employeeService.getAllEmployees();
       return list;
   }
 }
@DeleteMapping(value=“/delete\u user/{id}”)
公共列表deleteEmployee(@PathVariable(“id”)整数id){
employeeService.deleteEmployee(id);
List List=employeeService.getAllEmployees();
退货清单;
}
}
你试过这个吗

function delete_row(id){
$.ajax({
                type: "DELETE",
                url: "/delete_user",
                data: { id: id },
                success: function (data) {
                    console.log(data);
                },
                error: function () {
                    
                }
            });
}
或者直接绑定到url

function delete_row(id){
$.ajax({
                type: "DELETE",
                url: "/delete_user?id="+id,
                success: function (data) {
                    console.log(data);
                },
                error: function () {
                    
                }
            });
}

如果您没有发送名为
id
的查询参数,请尝试序列化JSONY。您拥有的是一个请求体,其中包含一个JSON对象,该对象包含一个名为
id
的键。为什么您认为这会在他们的不起作用时起作用?
function delete_row(id){
$.ajax({
                type: "DELETE",
                url: "/delete_user?id="+id,
                success: function (data) {
                    console.log(data);
                },
                error: function () {
                    
                }
            });
}