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@PathVariable
在 Spring MVC 中你可以在方法参数上使用@PathVariable 注解，将其与 URI 模板中的参数绑定起来：
@RequestMapping(path="/owners/{ownerId}}", method=RequestMethod.GET)
public String findOwner(@PathVariable("ownerId") String theOwner, Model model) {
// 具体的方法代码…
}
@RequestMapping(path="/owners/{ownerId}", method=RequestMethod.GET)
public String findOwner(@PathVariable String ownerId, Model model) {
Owner owner = ownerService.findOwner(ownerId);
model.addAttribute("owner", owner);
return "displayOwner";
}