public class StringReplaceUtil {
/**
* 根据用户名的不同长度，来进行替换 ，达到保密效果
*
* @param userName 用户名
* @return 替换后的用户名
*/
public static String userNameReplaceWithStar(String userName) {
String userNameAfterReplaced ="";
if (userName ==null){
userName ="";
}
int nameLength = userName.length();
if (nameLength <=1) {
userNameAfterReplaced ="*";
}else if (nameLength ==2) {
userNameAfterReplaced =replaceAction(userName,"(?<=\\d{0})\\d(?=\\d{1})");
}else if (nameLength >=3 && nameLength <=6) {
userNameAfterReplaced =replaceAction(userName,"(?<=\\d{1})\\d(?=\\d{1})");
}else if (nameLength ==7) {
userNameAfterReplaced =replaceAction(userName,"(?<=\\d{1})\\d(?=\\d{2})");
}else if (nameLength ==8) {
userNameAfterReplaced =replaceAction(userName,"(?<=\\d{2})\\d(?=\\d{2})");
}else if (nameLength ==9) {
userNameAfterReplaced =replaceAction(userName,"(?<=\\d{2})\\d(?=\\d{3})");
}else if (nameLength ==10) {
userNameAfterReplaced =replaceAction(userName,"(?<=\\d{3})\\d(?=\\d{3})");
}else if (nameLength >=11) {
userNameAfterReplaced =replaceAction(userName,"(?<=\\d{3})\\d(?=\\d{4})");
}
return userNameAfterReplaced;
}
/**
* 实际替换动作
*
* @param username username
* @param regular 正则
* @return * 替换成自己想要的数字
*/
private static String replaceAction(String username, String regular) {
return username.replaceAll(regular,"*");//这里的*号可以替换成自己想要的符号
}
/**
* 身份证号替换，保留前四位和后四位
*
* 如果身份证号为空 或者 null ,返回null ；否则，返回替换后的字符串；
*
* @param idCard 身份证号
* @return
*/
public static String idCardReplaceWithStar(String idCard) {
if (idCard.isEmpty() || idCard ==null) {
return null;
}else {
return replaceAction(idCard,"(?<=\\d{4})\\d(?=\\d{4})");
}
}
/**
* 银行卡替换，保留后四位
*
* 如果银行卡号为空 或者 null ,返回null ；否则，返回替换后的字符串；
*
* @param bankCard 银行卡号
* @return
*/
public static String bankCardReplaceWithStar(String bankCard) {
if (bankCard.isEmpty() || bankCard ==null) {
return null;
}else {
return replaceAction(bankCard,"(?<=\\d{0})\\d(?=\\d{4})");
}
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
使用：
// 修改电话号码 将中间四位改成*号
TextView phone = (TextView) bindViewById(R.id.pay_now_phone);
String str="13595616253";
String s = StringReplaceUtil.userNameReplaceWithStar(str);
phone.setText(s);
效果：
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