spring mvc——@Controller和@RequestMapping注解

不念不忘少年蓝@ 2024-03-30 10:17 76阅读 0赞

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### @RequestMapping 注解 ###

@RequestMapping 注解是 Spring MVC 中最常被用到的注解之一。它通常被标注在控制器方法上，负责将请求与处理请求的控制器方法关联起来，建立映射关系。  
Spring MVC 的前端控制器(DispatcherServlet)拦截到用户发来的请求后，会通过 @RequestMapping 注解提供的映射信息找到对应的控制器方法，对这个请求进行处理。

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package net.biancheng.c.controller;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    
    @Controller
    @RequestMapping("/springmvc")
    public class RequestMappingController {
    
        /**
         * @author c语言中文网
         * @RequestMapping value、name、method 属性
         */
        @RequestMapping(value = {"/welcome", "/do"}, name = "跳转到欢迎页", method = RequestMethod.GET)
        public String testValue() {
            return "welcome";
        }
    
        /**
         * @author c语言中文网
         * @RequestMapping 注解 params 属性
         */
        @RequestMapping(value = "/testParam", params = {"name=springmvc", "url=http://c.biancheng.net"})
        public String params() {
            return "param";
        }
       
        /**
         * @author c语言中文网
         * @RequestMapping 注解 headers 属性
         */
        @RequestMapping(value = "/testHeader", headers = {"Content-Type=application/json", "Referer=http://c.biancheng.net"})
        public String headers() {
            return "header";
        }
    }

[6c97465e7e6d18dd95b728d3c2eff1d7.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/c28764aaf99b4a73bffb0df003cec5ca.png
[5dc36c2e7e00ce1b29dce00ae964a953.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/6f960abc0436431988367081e1e105c4.png
[ec5ebda885c870f99e0b00361342b4db.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/2ca58d83fb2048978eb50f386e3cb688.png
[d0c0bb2191b4223c81758cdcedcd0310.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/e24930c7727f406baebeb2f9bc3d3413.png
[54e0bab2747237565ecb72f57fac5720.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/31ceb6b28f4e4d538589a45d7cf3109e.png
[50e994ca50a3fe2006e862d3f3d03b85.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/fa6f22c085234d54ba860017648d8643.png
[51bb588a81a6864809cb91965e4a2e77.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/f37cb895d369452d9dd98313cc912cf1.png