Jackson JSON

Spring为Jackson JSON库提供支持。

JSON视图

Spring WebFlux提供了内置支持，用于Jackson的序列化视图，允许仅呈现Object中的部分字段。要在@ResponseBody或ResponseEntity控制器方法中使用它，您可以使用Jackson的@JsonView注解来激活一个序列化视图类，如下例所示：

Java
Kotlin

@RestController
public class UserController {

	@GetMapping("/user")
	@JsonView(User.WithoutPasswordView.class)
	public User getUser() {
		return new User("eric", "7!jd#h23");
	}
}

public class User {

	public interface WithoutPasswordView {};
	public interface WithPasswordView extends WithoutPasswordView {};

	private String username;
	private String password;

	public User() {
	}

	public User(String username, String password) {
		this.username = username;
		this.password = password;
	}

	@JsonView(WithoutPasswordView.class)
	public String getUsername() {
		return this.username;
	}

	@JsonView(WithPasswordView.class)
	public String getPassword() {
		return this.password;
	}
}

@RestController
class UserController {

	@GetMapping("/user")
	@JsonView(User.WithoutPasswordView::class)
	fun getUser(): User {
		return User("eric", "7!jd#h23")
	}
}

class User(
		@JsonView(WithoutPasswordView::class) val username: String,
		@JsonView(WithPasswordView::class) val password: String
) {
	interface WithoutPasswordView
	interface WithPasswordView : WithoutPasswordView
}

@JsonView允许一个视图类数组，但您每个控制器方法只能指定一个。如果需要激活多个视图，请使用复合接口。