MySQL中Insert()函数方式隐藏
select insert(phone(表字段),4,4,‘****‘) as phone from user(表名)
Java代码中隐藏（正则表达式）
//隐藏手机号
String phoneNumber = "15567893456";
String resultPhone= phoneNumber.replaceAll("(\d{3})\d{4}(\d{4})","$1****$2");
System.out.println("隐藏后的手机号：" + resultPhone);
//隐藏邮箱
String email = "6111154212@qq.com";
String resultEmail = email.replaceAll("(\w?)(\w+)(\w)(@\w+\.[a-z]+(\.[a-z]+)?)", "$1****$3$4");
System.out.println("隐藏后的邮箱：" + resultEmail);
//隐藏身份证
String idCard = "420116199302220456";
String resultIdCard = idCard.replaceAll("(\d{4})\d{10}(\w{4})","$1*****$2");
System.out.println("隐藏后的身份证号：" + resultIdCard);
//输出结果
隐藏后的手机号：155****3456
隐藏后的邮箱：6****2@qq.com
隐藏后的身份证号：4201*****0456
Java中StringBuffer隐藏
String phoneNumber = "15567893456";
StringBuffer sb4=new StringBuffer(phoneNumber);
sb4.replace(3, 7, "****");
System.out.println(sb4.toString());
//输出结果
隐藏后的手机号：155****3456
