Spring mvc中@RequestMapping 6個基本用法小結

小結下spring mvc中的@RequestMapping的用法。 

 

1）最基本的，方法級別上應用，例如： 

   

Java代碼  

@RequestMapping(value="/departments")  

public String simplePattern(){  

  

  System.out.println("simplePattern method was called");  

  return "someResult";  

  

}  

 

   則訪問http://localhost/xxxx/departments的時候，會調用 simplePattern方法了 

 

2） 參數綁定 

  

Java代碼  

@RequestMapping(value="/departments")  

public String findDepatment(  

  @RequestParam("departmentId") String departmentId){  

    

    System.out.println("Find department with ID: " + departmentId);  

    return "someResult";  

  

}  

 

   

  形如這樣的訪問形式： 

 

   /departments?departmentId=23就能夠觸發訪問findDepatment方法了 

 

3 REST風格的參數 

  

Java代碼  

@RequestMapping(value="/departments/{departmentId}")  

public String findDepatment(@PathVariable String departmentId){  

  

  System.out.println("Find department with ID: " + departmentId);  

  return "someResult";  

  

}  

 

  

  形如REST風格的地址訪問，好比： 

/departments/23，其中用(@PathVariable接收rest風格的參數 

 

4 REST風格的參數綁定形式之2 

   先看例子，這個有點象以前的： 

Java代碼  

@RequestMapping(value="/departments/{departmentId}")  

public String findDepatmentAlternative(  

  @PathVariable("departmentId") String someDepartmentId){  

  

    System.out.println("Find department with ID: " + someDepartmentId);  

    return "someResult";  

  

}  

 

 

   這個有點不一樣，就是接收形如/departments/23的URL訪問，把23做爲傳入的departmetnId,，可是在實際的方法findDepatmentAlternative中，使用 

@PathVariable("departmentId") String someDepartmentId，將其綁定爲 

someDepartmentId,因此這裏someDepartmentId爲23 

 

5 url中同時綁定多個id 

 

Java代碼  

@RequestMapping(value="/departments/{departmentId}/employees/{employeeId}")  

public String findEmployee(  

  @PathVariable String departmentId,  

  @PathVariable String employeeId){  

  

    System.out.println("Find employee with ID: " + employeeId +   

      " from department: " + departmentId);  

    return "someResult";  

  

}  

 

 

   這個其實也比較好理解了。 

 

6 支持正則表達式 

  

Java代碼  

@RequestMapping(value="/{textualPart:[a-z-]+}.{numericPart:[\\d]+}")  

public String regularExpression(  

  @PathVariable String textualPart,  

  @PathVariable String numericPart){  

  

    System.out.println("Textual part: " + textualPart +   

      ", numeric part: " + numericPart);  

    return "someResult";  

}  

 

 

   好比以下的URL：/sometext.123，則輸出： 

Textual part: sometext, numeric part: 123.