springboot请求响应

• 不区分请求方法 @RequestMapping("/")
• GET请求：@GetMapping("/")
• POST请求：@PostMapping("/")
• JSON参数 @RequestBody ，普通参数 @RequestParam

@RestController = @Controller + @ResponseBody

原始请求

@RequestMapping("/simpleParam")
public String simpleParam(HttpServletRequest request){
	String name =request.getParameter("name");
	String ageStr = request.getParameter("age");
	int age =Integer.parselnt(ageStr);
	System.out.println(name+" :"+age);
	return "OK";
}

简单参数

形参变量名与 get 参数名相同，即可接收参数

@RequestMapping("/simpleParam")
public String simpleParam(String name, integer age){
	System.out.println(name+" :"+age);
	return name+" :"+age;
}
// 如果方法形参名称与请求参数名称不匹配, 通过注解映射
public String simpleParam(@RequestParam(name ="name")String name, integer age){
}

实体参数

// pojo.User.java
public class User {
	private String name;
	private integer age;
	private Address address;
	// ... get/set/toString 
}
// pojo.Address.java
public class Address {
	private String province,
	private String city;
}

// ?name=Bob&age=16&address.province=beijing&address.city=beijing
@RequestMapping("/simplePojo")
public String simplePojo(User user){
	System.out.println(user);
	return "OK";
}

数组/集合参数

?hobby=1&hobby=2 或 ?hobby=game,java

//数组参数
@RequestMapping("/arrayParam")
public String arrayParam(String[] hobby){
    System.out.println(Arrays.toString(hobby));
    return "OK";
}

//集合参数
@RequestMapping("/listParam")
public String listParam(@RequestParam List<String> hobby){
    System.out.println(hobby);
    return "OK";
}

日期参数

?updateTime=2022-12-12 10:05:45

@RestController
public class RequestController {
    //日期时间参数
   @RequestMapping("/dateParam")
    public String dateParam(@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") LocalDateTime updateTime){
        System.out.println(updateTime);
        return "OK";
    }
}

json 参数

{
	"name":"Bob", "age":16,
	"address":{
		"province": "北京",
		"city": "北京"
	}
}

@RestController
public class RequestController {
    //JSON参数
    @RequestMapping("/jsonParam")
    public String jsonParam(@RequestBody User user){
        System.out.println(user);
        return user;
    }
}

public class Address {
    private String province;
    private String city;
    // get/set/toString
}
public class User {
    private String name;
    private Integer age;
    private Address address;
    // get/set/toString
} 

路径参数

http://localhost:8080/path/1/alice

@RestController
public class RequestController {
    //路径参数
    @RequestMapping("/path/{id}/{name}")
    public String pathParam2(@PathVariable Integer id, @PathVariable String name){
        System.out.println(id+ " : " +name);
        return "OK";
    }
}