<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<config>
    <mask>
        <!-- pattern 定义匹配的正则表达式 -->
        <pattern><![CDATA[\b\d{12}\d{3,5}[xX]?\b]]></pattern>

        <!-- 指定json格式, key=value key:value形式的key，多个以空白分割 -->
        <keys>creditCard id name</keys>

        <!-- 脱敏后的数据保留, 默认无保留. eg. -->
        <!-- 3: 首尾各保留3位原字符，例如 abcdefg -> abc***efg -->
        <!-- 0.3: 尾部留3位原字符，例如 abcdefg -> ***efg -->
        <!-- 3.0: 首部留3位原字符，例如 abcdefg -> abc*** -->
        <keep>3</keep>

        <!-- mask定义脱敏后用于替换的掩码字符串，默认为___ -->
        <mask>***</mask>
    </mask>
    <mask>
        <pattern><![CDATA[\b\d{5}\b]]></pattern>
    </mask>

    <mask>
      <!-- rule表示JSON序列化与toString序列化JavaBean时，可以被引用的规则名称 -->
      <rule>NAME</rule> <!-- 姓名-->
      <pattern><![CDATA[([\u4E00-\u9FA5]{1})[\u4E00-\u9FA5]{1,}]]></pattern>
      <replace>$1**</replace>
    </mask>
    <mask>
      <rule>MOBILE</rule> <!-- 手机号-->
      <pattern><![CDATA[(\d{3})\d{4}(\d{4})]]></pattern>
    </mask>
    <mask>
      <rule>EMAIL</rule> <!-- 邮箱-->
      <pattern><![CDATA[(\w+)(@\w+)]]></pattern>
      <replace>******$2</replace>
    </mask>
</config>

@Mask
public class Req {
  @Mask private String receiveCardNo;

  @Mask(rule = "MOBILE")
  private String mobNo;

  @Mask(rule = "EMAIL")
  private String email;

  @Mask(empty = true)
  private String payPasswd;

  private String address;
}

@Slf4j
public class ToStringTest {
  @Test
  public void testToString() {
    Req r =
      new Req("1111222233334444", "18611112222", "[email protected]", "12345678", "beijing");
    log.info("request: {}", LogMask.mask(r));
  }
}

2020-05-09 16:34:28.743 INFO  [main] cn.footstone.logmask.json.ToStringTest : request params: cn.bjca.footstone.logmask.json.Req(receiveCardNo=___, mobNo=186****2222, email=bingoo.******@gmail.com, address=beijing)