Spring MVC 中@RequestMapping 6个基本用法小结

jopen 4年前

  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