Spring mvc中@RequestMapping 基本用法
1)最基本的,方法级如上应用,例如:
1 @RequestMapping(value="/departments") 2 public String simplePattern(){ 3 4 System.out.println("simplePattern method was called"); 5 return "someResult"; 6 7 }
则访问http://localhost/xxxx/departments的时候,会调用 simplePattern方法了
2) 参数绑定
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
1 @RequestMapping(value="/departments/{departmentId}") 2 public String findDepatment(@PathVariable String departmentId){ 3 4 System.out.println("Find department with ID: " + departmentId); 5 return "someResult"; 6 7 }
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:
1 @RequestMapping(value="/departments/{departmentId}") 2 public String findDepatmentAlternative( 3 @PathVariable("departmentId") String someDepartmentId){ 4 5 System.out.println("Find department with ID: " + someDepartmentId); 6 return "someResult"; 7 8 }
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
1 @RequestMapping(value="/departments/{departmentId}/employees/{employeeId}") 2 public String findEmployee( 3 @PathVariable String departmentId, 4 @PathVariable String employeeId){ 5 6 System.out.println("Find employee with ID: " + employeeId + 7 " from department: " + departmentId); 8 return "someResult"; 9 10 }
6) 支持正则表达式
1 @RequestMapping(value="/{textualPart:[a-z-]+}.{numericPart:[\\d]+}") 2 public String regularExpression( 3 @PathVariable String textualPart, 4 @PathVariable String numericPart){ 5 6 System.out.println("Textual part: " + textualPart + 7 ", numeric part: " + numericPart); 8 return "someResult"; 9 }
比如如下的URL:/sometext.123,则输出: Textual part: sometext, numeric part: 123.