SpringBoot2.1.X HTTP接口GET请求使用

刺骨的言语ヽ痛彻心扉 2024-04-18 19:11 24阅读 0赞

**GET请求方式有以下几种：**

@RequestMapping(path = "/{id}", method = RequestMethod.GET) 单一参数
    1) public String getUser(@PathVariable int id ) {}
    				
    2）@RequestMapping(path = "/{sid}/{name}", method = RequestMethod.GET) 
        可以同时指定多个提交方法
     getUser(@PathVariable("sid") String id,@PathVariable("name") String name)
    
    3）可以简化
    @GetMapping = @RequestMapping(method = RequestMethod.GET)
    @PostMapping = @RequestMapping(method = RequestMethod.POST)
    @PutMapping = @RequestMapping(method = RequestMethod.PUT)
    @DeleteMapping = @RequestMapping(method = RequestMethod.DELETE)
    
    4）@RequestParam(value = "name", required = true)
    	可以设置默认值，比如分页 
    
    4)@RequestBody 请求体映射实体类
    	需要指定http头为 content-type为application/json charset=utf-8
    
    5）@RequestHeader 请求头
    	@RequestHeader("access_token") String accessToken
    
    6）HttpServletRequest request自动注入获取参数

Student实体类（int id,String name,String pass,Date birthday）其他忽；

Controller代码：

//测试HTTP协议ＧＥＴ请求
    @RestController  //返回JSON到前端的
    public class GetController {
        //map对象
        Map<String,Object> maps =new HashMap<>();
    
    
        /**
         * 测试restful协议，从路径中获取字段
         * @param id
         * @param name
         * @return
         */
        @RequestMapping(path = "/find/{id}/{st_name}",method = RequestMethod.GET)
        public Object findStudent(@PathVariable("id") int id,@PathVariable("st_name") String name){
            maps.clear(); //清空
            maps.put("id",id);
            maps.put("name",name);
    
            return maps;
        }
    
    
        /**
         * 测试GetMapping
         * @param id
         * @param name
         * @return
         * 简化:@RequestMapping(method = {RequestMethod.GET})
         */
        @GetMapping("/find1")
        public Object find1(int id,String name){
            maps.clear(); //清空
            maps.put("id",id);
            maps.put("name",name);
            return maps;
        }
    
        /**
         * 默认值：是否要有必须的参数
         * @param id
         * @param name
         * @return  如果不传值就会是默认值！
         */
           @GetMapping("/find2")
        public Object find2(@RequestParam(defaultValue = "0",name = "sid") int id,String name){
            maps.clear(); //清空
            maps.put("id",id);
            maps.put("name",name);
            return maps;
        }
    
        /**
         * 注意：1、注意需要指定http头为 content-type为application/json
         * 	 * 		2、使用body传输数据
         * @param stu
         * @return
         */
        @RequestMapping("/find3")
        public Object find3(@RequestBody Student stu){
            maps.clear(); //清空
            maps.put("stu",stu);
            return maps;
        }
    
        /**
         * HttpServletRequest 请求获取参数值
         * @param request 自动注入获取参数
         * @return
         */
        @GetMapping("/find4")
        public Object find4(HttpServletRequest request){
            maps.clear(); //清空
            maps.put("id",request.getParameter("id"));
            return maps;
        }
    
    
        /**
         * 测试获取http头信息
         * @return
         */
        @GetMapping("/find5")
        public Object find5(@RequestHeader("access-token")String accessToken, int id){
            maps.clear(); //清空
            maps.put("id",id);
            maps.put("access-token",accessToken);
            return maps;
        }
    
    
    }

依次看效果：

**0） 测试restful协议，从路径中获取字段**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hseDIwMDgwODA4_size_16_color_FFFFFF_t_70][]

**1）测试GetMapping**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hseDIwMDgwODA4_size_16_color_FFFFFF_t_70 1][]

如果选择是POST，则发生异常哦!

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hseDIwMDgwODA4_size_16_color_FFFFFF_t_70 2][]

2)如果不传值就会是默认值！

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hseDIwMDgwODA4_size_16_color_FFFFFF_t_70 3][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hseDIwMDgwODA4_size_16_color_FFFFFF_t_70 4][]

3)返回整个JSON对象

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hseDIwMDgwODA4_size_16_color_FFFFFF_t_70 5][]

如果没有传值，可以自己传值哦！

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hseDIwMDgwODA4_size_16_color_FFFFFF_t_70 6][]

4）HttpServletRequest 请求获取参数值

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hseDIwMDgwODA4_size_16_color_FFFFFF_t_70 7][]

5）测试获取http头信息

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hseDIwMDgwODA4_size_16_color_FFFFFF_t_70 8][]

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