自定义valid实现自定义数据校验操作

1. 需要自定义注解 , 且指定校验class , 且具备valid注解必备的成员属性与方法

package com.imooc.demo.invalid;
import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target({ElementType.METHOD,ElementType.FIELD})
@Retention(value = RetentionPolicy.RUNTIME)
@Constraint(validatedBy=ConstraintImpl.class)
public @interface Myconstraint {
    /**
     * 这三个方法是必须要有的
     */
    String message();
    Class<?>[] groups() default { };
    Class<? extends Payload>[] payload() default { }
}

1. 编写valid指定的接口,并实现

package com.imooc.demo.invalid;
import com.imooc.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
public class ConstraintImpl implements ConstraintValidator<Myconstraint,Object>{
    @Autowired
    private UserService userService;
    @Override
    public void initialize(Myconstraint constraintAnnotation) {
        System.out.println("校验初始化...");
    }
    @Override
    public boolean isValid(Object value, ConstraintValidatorContext context) {
        System.out.println(userService.hello());;
        return true;
    }
}

1. 自定义注解使用

package com.imooc.demo.security;
import com.fasterxml.jackson.annotation.JsonView;
import com.imooc.demo.invalid.Myconstraint;
public class User {
    @Myconstraint(message = "哈哈哈")
    private String username;
    private int age;
    private String password;
    public interface SimpleUserInterface{}
    public interface DetailUserIntereface extends SimpleUserInterface{}
    @JsonView(value = DetailUserIntereface.class)
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public void setAge(int age) {
        this.age = age;
    }
    @JsonView(value = SimpleUserInterface.class)
    public String getUsername() {
        return username;
    }
    public int getAge() {
        return age;
    }
}