@PathVariable 可以来映射 URL 中的占位符到目标方法的参数中.
@RequestMapping("/testPathVariable/{id}") public String testPathVariable(@PathVariable("id") Integer id) { System.out.println("testPathVariable: " + id); return SUCCESS; } Rest风格的URL 以CRUD为例: 新增: /order POST 修改: /order/1 PUT update?id=1 获取: /order/1 GET get?id=1 删除: /order/1 DELETE delete?id=1 如何发送 PUT 请求和 DELETE 请求呢? 1. 需要配置 HiddenHttpMethodFilter 2. 需要发送 POST 请求 3. 需要在发送 POST 请求时携带一个 name="_method" 的隐藏域, 值为 DELETE 或 PUT 在 SpringMVC 的目标方法中如何得到 id 呢? 使用 @PathVariable 注解 @RequestMapping(value = "/testRest/{id}", method = RequestMethod.PUT) public String testRestPut(@PathVariable Integer id) { System.out.println("testRest Put: " + id); return SUCCESS; } @RequestMapping(value = "/testRest/{id}", method = RequestMethod.DELETE) public String testRestDelete(@PathVariable Integer id) { System.out.println("testRest Delete: " + id); return SUCCESS; } @RequestMapping(value = "/testRest", method = RequestMethod.POST) public String testRest() { System.out.println("testRest POST"); return SUCCESS; } @RequestMapping(value = "/testRest/{id}", method = RequestMethod.GET) public String testRest(@PathVariable Integer id) { System.out.println("testRest GET: " + id); return SUCCESS; }