Spring mvc中@RequestMapping 6個基本用法小結

1)最基本的,方法級別上應用,例如: 正則表達式

@RequestMapping(value="/departments")
public String simplePattern(){

  System.out.println("simplePattern method was called");
  return "someResult";

}

則訪問http://localhost/xxxx/departments的時候,會調用 simplePattern方法了app

 

2) 參數綁定 url

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

}

形如這樣的訪問形式: /departments?departmentId=23就能夠觸發訪問findDepatment方法了 spa

 

3 REST風格的參數 rest

@RequestMapping(value="/departments/{departmentId}")
public String findDepatment(@PathVariable String departmentId){

  System.out.println("Find department with ID: " + departmentId);
  return "someResult";

}

形如REST風格的地址訪問,好比:/departments/23,其中用(@PathVariable接收rest風格的參數 code

 

4 REST風格的參數綁定形式之2 blog

@RequestMapping(value="/departments/{departmentId}")
public String findDepatmentAlternative(
  @PathVariable("departmentId") String someDepartmentId){

    System.out.println("Find department with ID: " + someDepartmentId);
    return "someResult";

}

這個有點不一樣,就是接收形如/departments/23的URL訪問,把23做爲傳入的departmetnId,,可是在實際的方法findDepatmentAlternative中,使用 
@PathVariable("departmentId") String someDepartmentId,將其綁定爲 
someDepartmentId,因此這裏someDepartmentId爲23it

 

5 url中同時綁定多個id io

@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 支持正則表達式 class

@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";
}

好比以下的URL:/sometext.123,則輸出: Textual part: sometext, numeric part: 123. 

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