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就可以觸發訪問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，比如：?
/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，這個有點象之前的：?
Java代碼??

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

public?String?findDepatmentAlternative(??

??@PathVariable("departmentId")?String?someDepartmentId){??

??

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

????return?"someResult";??

??

}??

?? 這個有點不同，就是接收形如/departments/23的URL訪問，把23作為傳入的departmetnId,，但是在實際的方法findDepatmentAlternative中，使用?
@PathVariable("departmentId") String someDepartmentId，將其綁定為?
someDepartmentId,所以這里someDepartmentId為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";??

}??

?? 比如如下的URL：/sometext.123，則輸出：?
Textual part: sometext, numeric part: 123.?

總結

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