@RequestMapping 6个基本用法小结

 

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

 

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

 

 

   先看例子，这个有点象之前的

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";  
  
}  

 

 

 

 

6 支持正则表达式

@RequestMapping(value="/{textualPart:[a-z-]+}.{numericPart:[\\d]+}")  
public String regularexpression_r(  
  @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.