你不能具有可选的路径变量,但是可以有两个调用相同服务代码的控制器方法:
@RequestMapping(value = "/json/{type}", method = RequestMethod.GET)
public @ResponseBody TestBean typedTestBean(
HttpServletRequest req,
@PathVariable String type,
@RequestParam("track") String track) {
return getTestBean(type);
}
@RequestMapping(value = "/json", method = RequestMethod.GET)
public @ResponseBody TestBean testBean(
HttpServletRequest req,
@RequestParam("track") String track) {
return getTestBean();
}
如果你在使用Spring 4.1和Java 8,你可以使用java.util.Optional
它支持@RequestParam
,@PathVariable
,@RequestHeader
和@MatrixVariableSpring MVC
中-
@RequestMapping(value = {"/json/{type}", "/json" }, method = RequestMethod.GET)
public @ResponseBody TestBean typedTestBean(
@PathVariable Optional<String> type,
@RequestParam("track") String track) {
if (type.isPresent()) {
//type.get() will return type value
//corresponds to path "/json/{type}"
} else {
//corresponds to path "/json"
}
}