Spring mvc中@RequestMapping 6个基本用法小结

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  

 
   
 
@RequestMapping(value="/departments")  
public
  
"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 

Java代码

 
   
 
@RequestMapping(value="/departments")  
public
@RequestParam("departmentId") String departmentId){  
    
"Find department with ID: "
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 

Java代码  

@RequestMapping(value="/departments/{departmentId}")  
public String findDepatment(@PathVariable
  
"Find department with ID: "
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： 

Java代码  

@RequestMapping(value="/departments/{departmentId}")  
public
@PathVariable("departmentId") String someDepartmentId){  
  
"Find department with ID: "
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 

Java代码  

@RequestMapping(value="/departments/{departmentId}/employees/{employeeId}")  
public
@PathVariable
@PathVariable
  
"Find employee with ID: "
" from department: "
return "someResult";  
  
}

   这个其实也比较好理解了。 

6 支持正则表达式 

Java代码  

 
   
 
@RequestMapping(value="/{textualPart:[a-z-]+}.{numericPart:[\\d]+}")  
public
@PathVariable
@PathVariable
  
"Textual part: "
", numeric part: "
return "someResult";  
}

   比如如下的URL：/sometext.123，则输出： 

Textual part: sometext, numeric part: 123.