小结上spring mvc中的@RequestMapping的用法

?http://jackyrong.iteye.com/blog/1806326

?

小结下spring mvc中的@RequestMapping的用法。?

1）最基本的，方法级别上应用，例如：?
???

Java代码??

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

?? 则访问http://localhost/xxxx/departments的时候，会调用 simplePattern方法了?

2） 参数绑定?
??

Java代码??

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. }??

???
? 形如这样的访问形式：?

?? /departments?departmentId=23就可以触发访问findDepatment方法了?

3 REST风格的参数?
??

Java代码??

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. }??

??
? 形如REST风格的地址访问，比如：?
/departments/23，其中用(@PathVariable接收rest风格的参数?

4 REST风格的参数绑定形式之2?
?? 先看例子，这个有点象之前的：?

Java代码??

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. }??

?? 这个有点不同，就是接收形如/departments/23的URL访问，把23作为传入的departmetnId,，但是在实际的方法findDepatmentAlternative中，使用?
@PathVariable("departmentId") String someDepartmentId，将其绑定为?
someDepartmentId,所以这里someDepartmentId为23?

5 url中同时绑定多个id?
?

Java代码??

1. @RequestMapping(value="/departments/{departmentId}/employees/{employeeId}")??
2. public?String?findEmployee(??
3. ??@PathVariable?String?departmentId,??
4. ??@PathVariable?String?employeeId){??
5. ??
6. ????System.out.println("Find?employee?with?ID:?"?+?employeeId?+???
7. ??????"?from?department:?"?+?departmentId);??
8. ????return?"someResult";??
9. ??
10. }??

?? 这个其实也比较好理解了。?

6 支持正则表达式?
??

Java代码??

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?"someResult";??
9. }??

?? 比如如下的URL：/sometext.123，则输出：?
Textual part: sometext, numeric part: 123.?