Spring mvc中@RequestMapping 6个基本用法小结

http://www.2cto.com/kf/201302/189407.html

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 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 

  

Java代码  

@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 

  

Java代码  

@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： 

Java代码  

@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 

 

Java代码  

@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 

  

Java代码  

@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.