SpringBoot 入门 参数接收 必传参数 数组 集合 时间接收

接口声明

@RestController
//表示该类为请求处理类

public class HttpDeal {
    @RequestMapping("/login")
    //这个方法处理哪一个地址过来的请求
    public String hello()
    {
        return "返回给浏览器";
    }
   
    }
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---

接收参数

  @RequestMapping("/login")
    public  String login(int id,String password){
      return "登录成功"+id;
    }
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路径参数

http://127.0.0.1:8080/update/1212
路径参数可以传递多个
http://127.0.0.1:8080/update/1212/abc

   @RequestMapping("/update/{id}")
    public  String login(@PathVariable int id){
        System.out.println(id);
      return  "OK";
    }
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传递参数与接收参数不一致 必传参数

使用@RequestParam进行映射，前端只需要给name传递值即可 name=id，设置了@RequestParam参数必须传递否则报错，

 @RequestMapping("/login")
    public  String login(@RequestParam(name="name") int id, String password){
      return "登录成功"+id;
    }
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设置非必传参数

@RequestParam(required = false)
//required 表示参数非必传
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---

接收时间参数

pattern 表示传递的格式

@RequestMapping("/update")
    public  String login(@DateTimeFormat(pattern = "HH:mm") LocalTime time){
    System.out.println(time);
      return  "OK";
    }
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JSON类型参数

{
"user":"123",
"password":"456"  
}
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public class User {

    private String user;
    private String password;


    public String getUser() {
        return user;
    }

    public void setUser(String user) {
        this.user = user;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User{" +
                "user='" + user + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}
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   @RequestMapping("/update")
    public  String login(@RequestBody User user){
    System.out.println(user.getPassword());
      return  "OK";
    }
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数组参数接收

前端

http://127.0.0.1:8080/login?id=488&id=123&id=45

  @RequestMapping("/login")
    public  String login(String[] id){
	//id参数名需相同
        return Arrays.toString(id);
    }
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列表参数接收

使用列表接收需要添加RequestParam 注解

http://127.0.0.1:8080/login?id=488&id=123&id=45

  @RequestMapping("/login")
    public  String login(@RequestParam List<String> id){
        System.out.println(id);
      return  "OK";
    }
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