Springboot接收前台参数几种形式总计

╰半夏微凉° 2023-10-11 13:37 45阅读 0赞

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# Springboot接收前台参数几种形式总计 #

2018年08月07日 14:53:55 [快乐人生-程序快乐][-] 阅读数 4548 更多

分类专栏： [ java ][java]

# 转载：[https://blog.csdn.net/suki\_rong/article/details/80445880][https_blog.csdn.net_suki_rong_article_details_80445880] #

# 第一类：请求路径参数 #

## 1、@PathVariable ##

获取路径参数。即*url/\{id\}*这种形式。

## 2、@RequestParam ##

获取查询参数。即*url?name=*这种形式

### 例子 ###

GET  
[http://localhost:8080/demo/123?name=suki\_rong][http_localhost_8080_demo_123_name_suki_rong]  
对应的java代码：

@GetMapping("/demo/{id}") 
       public void demo( @PathVariable(name = "id") String id, @RequestParam(name = "name") String name) { 
       System. out.println( "id="+id); 
       System. out.println( "name="+name); 
       }

输出结果：  
id=123  
name=suki\_rong

# 第二类：Body参数 #

因为是POST请求，这里用Postman的截图结合代码说明

## 1、@RequestBody ##

### 例子 ###

![demo1][]  
对应的java代码：

@ PostMapping( path = "/demo1") 
       public void demo1(@RequestBody Person person) { 
       System .out .println( person .toString()); 
       }

输出结果：  
name:suki\_rong;age=18;hobby:programing

也可以是这样

@PostMapping(path = "/demo1") 
       public void demo1( @RequestBody Map<String, String> person) { 
       System. out.println(person. get( "name")); 
       }

输出结果：  
suki\_rong

## 2、无注解 ##

### 例子 ###

![demo2][]  
对应的java代码：

@ PostMapping( path = "/demo2") 
       public void demo2(Person person) { 
       System .out .println( person .toString()); 
       }

输出结果：  
name:suki\_rong;age=18;hobby:programing

## Person类 ##

public class Person { 
       
       private long id; 
       private String name; 
       private int age; 
       private String hobby; 
       
       @Override 
       public String toString(){ 
       return "name:"+name+ ";age="+age+ ";hobby:"+hobby; 
       } 
       
       // getters and setters 
       }

# 第三类：请求头参数以及Cookie #

## 1、@RequestHeader ##

## 2、@CookieValue ##

### 例子 ###

java代码：

@GetMapping("/demo3") 
       public void demo3( @RequestHeader(name = "myHeader") String myHeader, 
       @CookieValue(name = "myCookie") String myCookie) { 
       System. out.println( "myHeader=" + myHeader); 
       System. out.println( "myCookie=" + myCookie); 
       }

也可以这样

@GetMapping( "/demo3") 
       public void demo3(HttpServletRequest request) { 
       System. out.println(request.getHeader( "myHeader")); 
       for (Cookie cookie : request.getCookies()) { 
       if ( "myCookie". equals(cookie.getName())) { 
       System. out.println(cookie.getValue()); 
       } 
       } 
       }

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[-]: https://me.csdn.net/Rbaiheima
[java]: https://blog.csdn.net/rbaiheima/article/category/7179518
[https_blog.csdn.net_suki_rong_article_details_80445880]: https://blog.csdn.net/suki_rong/article/details/80445880
[http_localhost_8080_demo_123_name_suki_rong]: http://localhost:8080/demo/123?name=suki_rong
[demo1]: https://img-blog.csdn.net/20180525001103380?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N1a2lfcm9uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[demo2]: https://img-blog.csdn.net/20180525001626615?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N1a2lfcm9uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70