注解
@PathVariable， @RequestHeader，@ModelAttribute，@RequestParam，@MatrixVariable，@CookieValue，@ResponseBody
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<ul>
<a href="car/3/owner/lisi?age=18&interests=basketball&interests=game">car/{id}/owner/{username}</a>
<li>@PathVariable(路径变量)</li>
<li>@RequestHeader(获取请求头)</li>
<li>@RequestParam(请求参数)</li>
<li>@CookieValue(获取Cookie值)</li>
<li>@RequestBody(获取请求体[POST])</li>
</ul>
<form action="/save" method="POST">
测试@RequestBody获取数据<br/>
用户名:<input name="username"/><br/>
邮箱: <input name="email"/></br>
<input type="submit" value="提交">
</form>
<a href="/cars/sell;low=24;brand=byd,audi,yd">@MatrixVariable(矩阵变量)</a><br/>
<a href="/cars/sell;low=24;brand=byd;brand=audi;brand=yd">@MatrixVariable(矩阵变量)</a><br/>
<a href="/boss/1;age=20/2;age=10">@MatrixVariable(矩阵变量) /boss/{bossId}/{empId}</a><br/>
</body>
</html> import org.springframework.web.bind.annotation.*;
import javax.servlet.http.Cookie;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RestController
public class ParameterTestController {
@GetMapping("/car/{id}/owner/{username}")
public Map<String, Object> getCar(@PathVariable("id") Integer id,
@PathVariable("username") String name,
@PathVariable Map<String, String> pv,
@RequestHeader("User-Agent") String userAgent,
@RequestHeader Map<String, String> heads,
@RequestParam("age") Integer age,
@RequestParam("interests") List<String> interests,
@RequestParam Map<String, String> params
//@CookieValue("_ga") Cookie cookie
){
Map<String, Object> map = new HashMap<>();
map.put("id",id);
map.put("name",name);
map.put("pv",pv);
map.put("userAgent",userAgent);
map.put("heads",heads);
map.put("age",age);
map.put("interests",interests);
map.put("params",params);
//map.put("Cookie",cookie);
return map;
}
@PostMapping("/save")
public Map<String, Object> postMethod(@RequestBody String content){
Map<String, Object> map = new HashMap<>();
map.put("content",content);
return map;
}
/*
* spring boot 默认禁用了矩阵变量的功能
* 手动开启:原理. 对于路径的处理. UrlPathHelper类进行解析
* removeSemicolonContent(移除分号内容)支持矩阵变量
*/
@GetMapping("/cars/{path}")
public Map carsSell(@MatrixVariable("low") String low,
@MatrixVariable("brand") List<String> brand,
@PathVariable("path") String path){
Map<String, Object> map = new HashMap<>();
map.put("low",low);
map.put("brand",brand);
map.put("path",path);
return map;
}
@GetMapping("/boss/{bossId}/{empId}")
public Map boss(@MatrixVariable(value = "age",pathVar = "bossId") Integer bage,
@MatrixVariable(value = "age",pathVar = "empId") Integer eage,
@PathVariable("bossId") String bossId,
@PathVariable("empId") String empId){
Map<String, Object> map = new HashMap<>();
map.put("bage",bage);
map.put("eage",eage);
map.put("bossId",bossId);
map.put("empId",empId);
return map;
}
}
矩阵变量的使用
Servlet API
复杂参数
自定义对象参数
1. handlerMapping中找到能处理请求的Handler
2. 为当前handler找一个适配器HandlerAdapter
参数解析器
确定将要执行的目标方法的每一个参数的值是什么