The @RequestMapping annotation
The @RequestMapping annotation
The @RequestMapping annotation is used at class level to map the /calculation URI to the CalculationController class; that is, it ensures that the HTTP request to /calculation is mapped to the CalculationController class. Based on the path defined using the @RequestMapping annotation of the URI (postfix of /calculation, for example, /calculation/sqrt/144), it would be mapped to the respective methods. Here, the request mapping, /calculation/sqrt, is mapped to the sqrt() method, and /calculation/power is mapped to the pow() method.
You might have also observed that we have not defined what request method (GET/POST/PUT, and so on) these methods would use. The @RequestMapping annotation maps all the HTTP request methods by default. You could use specific methods by using the method property of RequestMapping. For example, you could write a @RequestMethod annotation in the following way to use the POST method:
xxxxxxxxxx@RequestMapping(value = "/power", method = POST) 
Closely Related Answers
xxxxxxxxxx@RequestMapping(value = "/addEmployee", method = RequestMethod.POST)public String submit(@ModelAttribute("employee") Employee employee) { // Code that uses the employee object return "employeeView";}
xxxxxxxxxx@RestController@RequestMapping("/home")public class IndexController { @RequestMapping("/") String get(){ //mapped to hostname:port/home/ return "Hello from get"; } @RequestMapping("/index") String index(){ //mapped to hostname:port/home/index/ return "Hello from index"; }}
xxxxxxxxxx@Controllerpublic class EmployeeController { @RequestMapping("/employee-management/employees") public String getAllEmployees(Model model) { //application code return "employeesList"; } @RequestMapping("/employee-management/employees/add") public String addEmployee(EmployeeVO employee) { //application code return "employeesDetail"; } @RequestMapping("/employee-management/employees/update") public String updateEmployee(EmployeeVO employee) { //application code return "employeesDetail"; } @RequestMapping(value={"/employee-management/employees/remove","/employee-management/employees/delete"}) public String removeEmployee(@RequestParam("id") String employeeId) { //application code return "employeesList"; }}
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