如何启用bean验证器- Spring引导

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

@Configuration
@EnableWebMvc
public class AppConfig {

}

import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

public class User {

    @NotNull
    private String name;

    @Size(min = 6, max = 20)
    private String password;

    // Getters and setters

}

import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
@Validated
public class UserController {

    @PostMapping("/users")
    public void createUser(@Valid @RequestBody User user) {
        // 处理用户创建逻辑
    }

}

spring.mvc.validation.enabled=true