此版本仍在开发中，尚未被视为稳定版本。对于最新的稳定版本，请使用 Spring Framework 6.2.0！spring-doc.cadn.net.cn

Jackson JSON

Spring 提供对 Jackson JSON 库的支持。spring-doc.cadn.net.cn

JSON 视图

在 Reactive 堆栈中查看 equivalentspring-doc.cadn.net.cn

Spring MVC 为 Jackson 的序列化视图提供了内置支持，，它们只允许在Object.若要将其与@ResponseBody或ResponseEntitycontroller 方法，你可以使用 Jackson 的@JsonView注解来激活序列化视图类，如下例所示：spring-doc.cadn.net.cn

Javaspring-doc.cadn.net.cn
Kotlinspring-doc.cadn.net.cn

@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("eric", "7!jd#h23")
}

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

	interface WithoutPasswordView
	interface WithPasswordView : WithoutPasswordView
}

@JsonView允许视图类数组，但您只能为每个 controller 方法。如果需要激活多个视图，可以使用复合界面。

如果您想以编程方式执行上述作，而不是声明@JsonView注解将返回值用MappingJacksonValue并使用它来提供序列化视图：spring-doc.cadn.net.cn

Javaspring-doc.cadn.net.cn
Kotlinspring-doc.cadn.net.cn

@RestController
public class UserController {

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

@RestController
class UserController {

	@GetMapping("/user")
	fun getUser(): MappingJacksonValue {
		val value = MappingJacksonValue(User("eric", "7!jd#h23"))
		value.serializationView = User.WithoutPasswordView::class.java
		return value
	}
}

对于依赖视图分辨率的控制器，您可以添加序列化视图类添加到模型中，如下例所示：spring-doc.cadn.net.cn

Javaspring-doc.cadn.net.cn
Kotlinspring-doc.cadn.net.cn

@Controller
public class UserController extends AbstractController {

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

@Controller
class UserController : AbstractController() {

	@GetMapping("/user")
	fun getUser(model: Model): String {
		model["user"] = User("eric", "7!jd#h23")
		model[JsonView::class.qualifiedName] = User.WithoutPasswordView::class.java
		return "userView"
	}
}