Summary of 6 basic usages of @requestmapping in Spring MVC (reproduced)

Summary of the usage of @requestmapping in spring MVC.

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

Java code   

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

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

2) Parameter binding

Java code   

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 
7.   
8. }  

Forms such as the form of access:

/DEPARTMENTS?DEPARTMENTID=23 can trigger access to the Finddepatment method.

3 Rest-style parameters

Java code   

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

4 Rest-style parameter binding form 2
First look at the example, this is a bit like before:

Java code   

1. @RequestMapping (Value= "/departments/{ DepartmentID} ")   
2. public string  Finddepatmentalternative (  
3.    @PathVariable ( "DepartmentID")  string somedepartmentid) {  
4.    
5.     system.out.println (
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, which is bound to
Somedepartmentid, so somedepartmentid here is

5 multiple IDs are bound at the same time in the URL

Java code

2. @RequestMapping (value="/departments/{departmentid}/employees/{employeeid}")
4. Public String Findemployee (
6. @PathVariable String DepartmentID,
8. @PathVariable String employeeId) {  
12. System.out.println ("Find employee with ID:" + employeeId +
14. "from department:" + DepartmentID);
16. return "Someresult";
20. }

This is actually better understood.

6 support for regular expressions

Java code

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: "  + TEXTUALPART +   
7.        ", numeric part: "  +  Numericpart);   
8.     return 
9. }  

   such as the following url:/sometext.123, the output:  
Textual Part:sometext, Numeric part:123.  

@requestmapping 6 Basic Usage Summary in Spring MVC (reprint)