head > < meta charset = " UTF-8 " > < title > Title < body > < h1 > 基本注解 < hr /> < a href = " /monster/100/king " > @PathVariable-路径变量:/monster/100/king _spring boot 给接受的参数加注释">
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>基本注解</h1>
<hr/>
<a href="/monster/100/king">@PathVariable-路径变量:/monster/100/king</a>
</body>
</html>
package com.sun.springboot.controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import java.util.Map; /** * @author 孙显圣 * @version 1.0 */ @RestController public class ParameterController { @GetMapping("/monster/{id}/{name}") //接受两个路径参数 public String pathVariable(@PathVariable("id") Integer id, @PathVariable("name") String name, @PathVariable Map<String, String> map) { //这里的map指将所有的路径参数都放到map中 System.out.println("id:" + id + " name:" + name); for (Map.Entry<String, String> entry : map.entrySet()) { System.out.println("key:" + entry.getKey() + " value: " + entry.getValue()); } return "success"; //返回json给浏览器 } }
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>基本注解</h1>
<hr/>
<a href="/requestHeader">@RequestHeader-获取请求头信息</a>
</body>
</html>
package com.sun.springboot.controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestHeader; import org.springframework.web.bind.annotation.RestController; import java.util.Map; /** * @author 孙显圣 * @version 1.0 */ @RestController public class ParameterController { @GetMapping("/requestHeader") //获取请求头的信息 public String requestHeader(@RequestHeader("host") String host, @RequestHeader Map<String, String> header) { System.out.println("host:" + host); System.out.println(header); return "success"; } }
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>基本注解</h1>
<hr/>
<a href="/hi?hobby=打篮球&hobby=踢球">@RequestParam-请求参数</a>
</body>
</html>
package com.sun.springboot.controller; import org.springframework.web.bind.annotation.*; import java.util.List; /** * @author 孙显圣 * @version 1.0 */ @RestController public class ParameterController { @GetMapping("/hi") public String hi(@RequestParam(value = "name", defaultValue = "孙显圣") String name, @RequestParam("hobby") List<String> list) { System.out.println("name:" + name); System.out.println(list); return "success"; } }
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>基本注解</h1>
<hr/>
<a href="/cookie">@CookieValue-获取cookie的值</a>
</body>
</html>
package com.sun.springboot.controller; import org.springframework.web.bind.annotation.*; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; /** * @author 孙显圣 * @version 1.0 */ @RestController public class ParameterController { @GetMapping("/cookie") //这里可以设置required = false意为不是必须存在的,如果不存在则得到的值就为null //如果后面的参数类型是Cookie,则会获取Cookie对象并封装到变量中 public String cookie(@CookieValue(value = "cookie_key", required = false) String cookie_value, @CookieValue(value = "username" , required = false) Cookie cookie, HttpServletRequest request) { //使用原生api获取cookies Cookie[] cookies = request.getCookies(); for (Cookie cookie1 : cookies) { System.out.println(cookie1); } System.out.println(cookie_value); System.out.println("name:" + cookie.getName() + " value: " + cookie.getValue()); return "success"; } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h1>基本注解</h1> <hr/> <form action="/requestBody" method="post"> <input type="text" name="username"><br> <input type="text" name="password"><br> <input type="submit" value="submit"> </form> </body> </html>
package com.sun.springboot.controller; import org.springframework.web.bind.annotation.*; /** * @author 孙显圣 * @version 1.0 */ @RestController public class ParameterController { @PostMapping("requestBody") public String getRequestBody(@RequestBody String requestBody) { //获取请求体 System.out.println(requestBody); return "success"; } }
package com.sun.springboot.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestAttribute; import org.springframework.web.bind.annotation.ResponseBody; import javax.servlet.http.HttpServletRequest; /** * @author 孙显圣 * @version 1.0 */ @Controller public class RequestController { @GetMapping("/login") public String login(HttpServletRequest request) { //在Request域中存放一些信息 request.setAttribute("name", "sun"); request.setAttribute("age", 13); //调用视图解析器,请求转发到/ok return "forward:/ok"; } @ResponseBody @GetMapping("/ok") public String ok(@RequestAttribute(value = "name", required = false) String name) { //使用注解来获取请求域中的信息并封装到参数中 System.out.println("name: " + name); return "success"; //返回json给浏览器 } }
spring:
mvc:
view: #配置了视图解析器
suffix: .html #后缀
prefix: / #前缀,指的是根目录
package com.sun.springboot.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.SessionAttribute; import javax.servlet.http.HttpServletRequest; /** * @author 孙显圣 * @version 1.0 */ @Controller public class SessionController { @GetMapping("/login") public String login(HttpServletRequest request) { //在session域中设置信息 request.getSession().setAttribute("session", "session_value"); //调用视图解析器,请求转发到/ok return "forward:/ok"; } @ResponseBody @GetMapping("/ok") public String ok(@SessionAttribute(value = "session") String value) { //使用注解来获取session域中的信息并封装到参数中 System.out.println("session: " + value); return "success"; //返回json给浏览器 } }
package com.sun.springboot.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestAttribute; import org.springframework.web.bind.annotation.ResponseBody; import javax.servlet.http.HttpServletResponse; import java.util.Map; /** * @author 孙显圣 * @version 1.0 */ @Controller public class RequestController { @GetMapping("/login") public String login(Map<String, Object> map, Model model, HttpServletResponse response) { //给map封装信息 map.put("user", "sun"); map.put("job", "工程师"); //model封装信息 model.addAttribute("sal", 1000); //结果最后都会封装到request域中 //调用视图解析器,请求转发到/ok return "forward:/ok"; } @ResponseBody @GetMapping("/ok") public String ok(@RequestAttribute("user") String user, @RequestAttribute("job") String job, @RequestAttribute("sal") Integer sal) { //使用注解来获取请求域中的信息并封装到参数中 System.out.println("user:" + user + " job:" + job + " sal:" +sal); return "success"; //返回json给浏览器 } }
package com.sun.springboot.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.CookieValue; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.ResponseBody; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletResponse; /** * @author 孙显圣 * @version 1.0 */ @Controller public class RequestController { @GetMapping("/login") public String login(HttpServletResponse response) { Cookie cookie = new Cookie("cookie_name", "cookie_value"); response.addCookie(cookie); //调用视图解析器,重定向到/ok,不能使用请求转发,因为虽然响应给客户端cookie了, // 但是由于是请求转发,第二个controller得到的是最开始的请求,那时候还没有cookie return "redirect:/ok"; } @ResponseBody @GetMapping("/ok") public String ok(@CookieValue("cookie_name") Cookie cookie) { //获取cookie System.out.println("key:" + cookie.getName() + " value:" + cookie.getValue()); return "success"; //返回json给浏览器 } }
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