SpringMVC中@RequestMapping的基本用法

最近从Struts转投SpringMVC，看代码时发现这个注解，感觉其作用应该和Struts的action差不多，把用法记录下来。

@RequestMapping(value="/departments")  
public String simplePattern(){  
  
  System.out.println("simplePattern method was called");  
  return "someResult";  
  
}  
//访问http://localhost/xxxx/departments的时候，会调用implePattern方法了

@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

@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

@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

@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";  
  
}  
//绑定多个参数

@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";  
}  

//正则表达式 比如如下的URL：/sometext.123，则输出： Textual part: sometext, numeric part: 123.