@requestmapping basic usage in Spring MVC

1) The most basic, method-level applications, such as:

1 @RequestMapping (value= "/departments")  2 public String Simplepattern ( {  3   4   System.out.println ("Simplepattern method was called");   5   return "Someresult";   6   7 }  

When accessing Http://localhost/xxxx/departments, the Simplepattern method is called.

2) Parameter binding

1 @RequestMapping (value= "/departments")  2 public String finddepatment (   3   @RequestParam ("DepartmentID") String DepartmentID) {  4     5     SYSTEM.OUT.PRINTLN ("Find Department with ID:" + DepartmentID);   6     return "Someresult";   7   8 }  

The form of access:/departments?departmentid=23 can trigger access to the Finddepatment method.

3) Rest-style parameters

1 @RequestMapping (value= "/departments/{departmentid}")  2 Public String Finddepatment (@PathVariable string departmentid) {  3   4   SYSTEM.OUT.PRINTLN ("Find Department with ID:" + DepartmentID);   5   return "Someresult";   6   7 }  

  Like restful address access, such as:  /DEPARTMENTS/23, which is used (@PathVariable receive rest-style parameters  

4)   The 2  of the parameter binding form of rest style;
   look at the example first, this is a bit like before:  

 1  @RequestMapping (value= "/departments/{departmentid}" "  2  public   String finddepatmentalternative ( 3  @PathVariable (" DepartmentID ") String Somedepartmentid) { 4  5  System.out.println ("Find Department with ID:" + Somedepartmentid);  6  return  "Someresult" ;  7  8 } 

This is a bit different, is to receive a form such as/DEPARTMENTS/23 URL Access, the 23 as the incoming Departmetnid, but in the actual method finddepatmentalternative, using
@PathVariable ("DepartmentID") String Somedepartmentid, bind it to Somedepartmentid, so somedepartmentid here is 23

5) Multiple IDs are bound at the same time in the URL

1@RequestMapping (value= "/departments/{departmentid}/employees/{employeeid}")  2  PublicString Findemployee (3 @PathVariable String DepartmentID,4 @PathVariable String employeeId) {  5   6SYSTEM.OUT.PRINTLN ("Find Employee with ID:" + employeeId +7"From department:" +DepartmentID); 8     return"Someresult"; 9   Ten}

6) Support Regular expressions

 1  @RequestMapping (value= "/{textualpart:[a-z-]+}.{ numericpart:[\\d]+} ")  2  public   String regularexpression ( 3   @PathVariable String Textualpart,  4   @PathVariable String numericpart) { 5  6  System.out.println ("Textual part:" + Textualp  Art + 7  ", numeric part:" + Numericpart);  8  return  "Someresult" ;  9 } 

For example, the following url:/sometext.123, then output: Textual Part:sometext, numeric part:123.

@requestmapping basic usage in Spring MVC