使用Spring可以使路径变量可选吗？

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();}