StringUtils

package com.example.yueyundong1.util;

import java.security.MessageDigest;

import android.text.TextUtils;
import android.widget.EditText;

/**
 * 各种针对String的常用功能
 * @author vagrant QQ:513302092
 * @date 创建时间: 2015年4月27日
 */
public class StringUtils {
	// 检查手机号码合法性
	public static boolean isPhoneNumberLegal(String number) {
		String telRegex = "[1][358]\\d{9}";
		if (TextUtils.isEmpty(number))
			return false;
		else
			return number.matches(telRegex);
	}

	// 密码合法性检查,正则表达式可根据具体情况修改
	public boolean isPasswordLegal(String password) {
		String pwRegex = "^[a-zA-Z0-9]{6,20}$";
		return password.matches(pwRegex);
	}

	// 检查命名是否合法,正则表达式可根据具体情况修改
	public boolean isNameLegal(String name) {
		String nameRegex = "^[\u4E00-\u9FA5A-Za-z0-9_]{2,15}$";
		return name.matches(nameRegex);
	}

	// 检查年龄是否合法
	public boolean isAgeLegal(int age) {
		if (1 <= age && age <= 99)
			return true;
		return false;
	}
	//非空判断
	public static boolean isEmpty(CharSequence str) {
		return (str == null || str.length() == 0);
	}

	// MD5加密
	public static final String getMd5(final String toEncrypt) {
		try {
			final MessageDigest digest = MessageDigest.getInstance("md5");
			digest.update(toEncrypt.getBytes());
			final byte[] bytes = digest.digest();
			final StringBuilder sb = new StringBuilder();
			for (int i = 0; i < bytes.length; i++) {
				sb.append(String.format("%02X", bytes[i]));
			}
			return sb.toString().toLowerCase();
		} catch (Exception exc) {
			return ""; // Impossibru!
		}
	}
}