spingMVC关于@RequestMapping的几种用法

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一、跳转

    @RequestMapping(value="/departments")      public String simplePattern(){        System.out.println("6666");        return "someResult";     }  

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

二、 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

三、 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

四、REST风格的参数绑定形式之2

对比上面

    @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

五、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";      }  

六、正则表达

    @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.