基于注解的字段脱敏处理

package io.lgxkdream.test2;

import org.apache.commons.lang3.StringUtils;

/**
 * @title: MaskUtils
 * @description: 掩码工具类
 * @Copyright: Copyright (c) 2018
 * @Company: lgxkdream.github.io
 * @author gang.li
 * @version 1.0.0
 * @since 2018年3月19日 上午10:59:57
 */
public class MaskUtils {
	public static String maskCellphone(String cellphoneNo) {
		if ((cellphoneNo == null) || (cellphoneNo.trim().length() != 11)) {
			return cellphoneNo;
		}
		return cellphoneNo.substring(0, 3) + "****" + cellphoneNo.substring(cellphoneNo.length() - 4);
	}

	public static String maskEmail(String email) {
		if (StringUtils.isBlank(email)) {
			return "";
		}
		int index = StringUtils.indexOf(email, "@");
		if (index <= 1)
			return email;
		else
			return StringUtils.rightPad(StringUtils.left(email, 1), index, "*")
					.concat(StringUtils.mid(email, index, StringUtils.length(email)));
	}

	private static String maskCardNo(String cardNo) {
		if ((cardNo == null) || (cardNo.trim().length() <= 8)) {
			return cardNo;
		}
		cardNo = cardNo.trim();
		int length = cardNo.length();
		String firstFourNo = cardNo.substring(0, 4);
		String lastFourNo = cardNo.substring(length - 4);
		String mask = "";
		for (int i = 0; i < length - 8; i++) {
			mask = mask + "*";
		}
		return firstFourNo + mask + lastFourNo;
	}

	public static String maskIDCardNo(String idCardNo) {
		return maskCardNo(idCardNo);
	}

	public static String maskBankCardNo(String bankCardNo) {
		return maskCardNo(bankCardNo);
	}
	
}

package io.lgxkdream.test2;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * @title: SensitiveField
 * @description: 掩码注解
 * @Copyright: Copyright (c) 2018
 * @Company: lgxkdream.github.io
 * @author gang.li
 * @version 1.0.0
 * @since 2018年3月19日 上午11:01:45
 */
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface SensitiveField {

	SensitiveTypeEnum value() default SensitiveTypeEnum.IDCARD;

    enum SensitiveTypeEnum {
        IDCARD,
        BANKCARD,
        MOBILE,
        EMAIL,
        CVV;
    }
    
}

package io.lgxkdream.test2;

import java.lang.reflect.Field;

import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

/**
 * @title: SensitiveReflectionToStringBuilder
 * @description: 重写用于toString的ReflectionToStringBuilder
 * @Copyright: Copyright (c) 2018
 * @Company: lgxkdream.github.io
 * @author gang.li
 * @version 1.0.0
 * @since 2018年3月19日 上午11:06:20
 */
public class SensitiveReflectionToStringBuilder extends ReflectionToStringBuilder {

	public SensitiveReflectionToStringBuilder(Object object, ToStringStyle style) {
		super(object, style);
	}

	@Override
	protected Object getValue(Field field) throws IllegalArgumentException, IllegalAccessException {
		if (field.getType() == String.class && field.isAnnotationPresent(SensitiveField.class)) {
			String v = (String) field.get(this.getObject());
			switch (field.getAnnotation(SensitiveField.class).value()) {
			case IDCARD:
				return MaskUtils.maskIDCardNo(v);
			case BANKCARD:
				return MaskUtils.maskBankCardNo(v);
			case MOBILE:
				return MaskUtils.maskCellphone(v);
			case EMAIL:
				return MaskUtils.maskEmail(v);
			case CVV:
				return v == null ? null : "***";
			default:
				return v;
			}
		}
		return field.get(this.getObject());
	}

}

package io.lgxkdream.test2;

import org.apache.commons.lang3.builder.ToStringStyle;

import io.lgxkdream.test2.SensitiveField.SensitiveTypeEnum;

/**
 * @title: MyEntity
 * @description: 测试实体
 * @Copyright: Copyright (c) 2018
 * @Company: lgxkdream.github.io
 * @author gang.li
 * @version 1.0.0
 * @since 2018年3月19日 上午11:21:04
 */
public class MyEntity {
	
	/**
     * 证件号
     */
    @SensitiveField
    private String idNo;

    /**
     * 手机号
     */
    @SensitiveField(SensitiveTypeEnum.MOBILE)
    private String mobile;

    /**
     * 姓名
     */
    private String name;
    
    /**
     * 邮箱
     */
    @SensitiveField(SensitiveTypeEnum.EMAIL)
    private String email;

	public String getIdNo() {
		return idNo;
	}

	public void setIdNo(String idNo) {
		this.idNo = idNo;
	}

	public String getMobile() {
		return mobile;
	}

	public void setMobile(String mobile) {
		this.mobile = mobile;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
    
	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	@Override
    public String toString() {
        return new SensitiveReflectionToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE).toString();
    }

}

package io.lgxkdream.test2;

/**
 * @title: MyTest
 * @description: 测试类
 * @Copyright: Copyright (c) 2018
 * @Company: lgxkdream.github.io
 * @author gang.li
 * @version 1.0.0
 * @since 2018年3月19日 上午11:21:22
 */
public class MyTest {
	
	public static void main(String[] args) {
		MyEntity entity = new MyEntity();
		entity.setIdNo("220222196309129847");
		entity.setMobile("15764132696");
		entity.setName("张三");
		entity.setEmail("[email protected]");
		System.out.println(entity.toString());
		// 测试结果：MyEntity[idNo=2202**********9847,mobile=157****2696,name=张三,email=2*********@qq.com]
	}

}