SpringBoot指南（四）——RESTful风格

请求的路径相同&＃xff0c;通过改变请求的方式来对应增删改查

• GET&＃xff1a;查
• POST&＃xff1a;增
• PUT&＃xff1a;修
• DELETE&＃xff1a;删

原理

• 请求被HiddenHttpMethodFilter拦截
• 判断请求是否正常&＃xff0c;是否是POST请求
• 获取**_method**的值&＃xff0c;兼容PUT、DELETE、PATCH
• 使用装饰者模式requestWrapper重写getMethod方法&＃xff0c;传入_method值

// application.properties// 开启对隐藏方法PUT和DELETE的支持
spring.mvc.hiddenmethod.filter.enabled&＃61;true


// html<form th:action&＃61;"&＃64;{/user/user}" method&＃61;"post"><input type&＃61;"hidden" name&＃61;"_method" value&＃61;"put">...
form>


// controller层&＃64;RequestMapping("/user")
&＃64;RestController
public class UserController {&＃64;Autowiredprivate UserService userService;&＃64;RequestMapping(value &＃61; "/user", method &＃61; RequestMethod.GET)List<User> findAllUsers() {return null;}&＃64;RequestMapping(value &＃61; "/user", method &＃61; RequestMethod.POST)public String saveUser(User user) {return null;}&＃64;RequestMapping(value &＃61; "/user", method &＃61; RequestMethod.PUT)public String updateUser(User user) {return null;}&＃64;RequestMapping(value &＃61; "/user", method &＃61; RequestMethod.DELETE)public String deleteUser(Integer userId) {return null;}
}