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：

@RequestMapping(value="/departments")  public String simplePattern(){      System.out.println("simplePattern method was called");    return "someResult";    }

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

2） 参数绑定

@RequestMapping(value="/departments")  public String findDepatment(    @RequestParam("departmentId") String departmentId){          System.out.println("Find department with ID: " + departmentId);      return "someResult";    }

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

@RequestMapping(value="/departments/{departmentId}")  public String findDepatment(@PathVariable String departmentId){      System.out.println("Find department with ID: " + departmentId);    return "someResult";    }

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：

@RequestMapping(value="/departments/{departmentId}")  public String findDepatmentAlternative(    @PathVariable("departmentId") String someDepartmentId){        System.out.println("Find department with ID: " + someDepartmentId);      return "someResult";    }

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

@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";    }

  这个其实也比较好理解了。

6 支持正则表达式

@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，则输出：
Textual part: sometext, numeric part: 123.

来自： http://blog.csdn.net/hejingyuan6/article/details/49993445