Summary of 6 basic usages of @requestmapping in Spring MVC

Summary of 6 basic usages of @requestmapping in Spring MVC (2013-02-18 11:57:46) reproduced

Category: Java notes

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) {
5. SYSTEM.OUT.PRINTLN ("Find Department with ID:" + DepartmentID);
6. return "Someresult";
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) {
4. SYSTEM.OUT.PRINTLN ("Find Department with ID:" + DepartmentID);
5. return "Someresult";
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) {
5. SYSTEM.OUT.PRINTLN ("Find Department with ID:" + Somedepartmentid);
6. return "Someresult";
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 the somedepartmentid here is 23.

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

1. @RequestMapping (value= "/departments/{departmentid}/employees/{employeeid}")
2. Public String Findemployee (
3. @PathVariable String DepartmentID,
4. @PathVariable String employeeId) {
6. SYSTEM.OUT.PRINTLN ("Find Employee with ID:" + employeeId +
7. "From department:" + DepartmentID);
8. return "Someresult";
10. }

This is actually better understood.

6 Support for regular expressions
Java code

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

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

Summary of 6 basic usages of @requestmapping in Spring MVC