Android Open Source - Common-Library Str Utils

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License

The source code is released under:
Apache License
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Java Source Code

package com.morgan.library.utils;
//from ww w  . j a  va2s .com
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Locale;
import java.util.Map;
import java.util.UUID;
import java.util.regex.Pattern;

/**
 * ???????????????
 * 
 * @author Morgan.Ji
 * 
 */
public class StrUtils {
  private final static Pattern EMAIL_PATTERN = Pattern
      .compile("\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*");

  public static String encodeUrl(String requestUrl, Map<String, Object> params) {
    StringBuilder url = new StringBuilder(requestUrl);
    if (url.indexOf("?") < 0)
      url.append('?');

    for (String name : params.keySet()) {
      url.append('&');
      url.append(name);
      url.append('=');
      try {
        url.append(URLEncoder.encode(String.valueOf(params.get(name)),
            "utf-8"));
      } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
      }
    }
    return url.toString().replace("?&", "?");
  }

  /**
   * ?????????URL?????{}??????????
   * 
   * @param url
   * @param parameter
   * @return
   */
  public static String Format(String url, Object... parameter) {
    String result = url;
    for (int i = 0; i < parameter.length; i++) {
      int startPoint = -1;
      int endPoint = -1;
      startPoint = result.indexOf('{');
      endPoint = result.indexOf('}');
      if (startPoint >= 0 && endPoint > startPoint) {
        result = result.substring(0, startPoint)
            + parameter[i].toString()
            + result.substring(endPoint + 1);
      }
    }
    return result;
  }

  /**
   * ??????????????? ???????????????????????????????? ???????null????????true
   * 
   * @param input
   * @return boolean
   */
  public static boolean isEmpty(String input) {
    if (input == null || "".equals(input)) {
      return true;
    }
    for (int i = 0; i < input.length(); i++) {
      char c = input.charAt(i);
      if (c != ' ' && c != '\t' && c != '\r' && c != '\n') {
        return false;
      }
    }
    return true;
  }

  private static boolean isChinese(char c) {
    Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
    if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
        || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
        || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
        || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
        || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
        || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
        || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {
      return true;
    }
    return false;
  }

  // ??????????????
  public static boolean isChinese(String strName) {
    char[] ch = strName.toCharArray();
    for (int i = 0; i < ch.length; i++) {
      char c = ch[i];
      if (isChinese(c)) {
        return true;
      }
    }
    return false;
  }

  public static String generateId() {
    UUID uuid = UUID.randomUUID();
    String uniqueId = uuid.toString();
    return uniqueId;
  }

  public static String encryptToMD5(String info) {
    byte[] digesta = null;
    try {
      // ????md5????????
      MessageDigest alga = MessageDigest.getInstance("MD5");
      // ????????????????
      alga.update(info.getBytes());
      // ??????
      digesta = alga.digest();
    } catch (NoSuchAlgorithmException e) {
      e.printStackTrace();
    }
    // ?????????
    String rs = byte2hex(digesta);
    return rs;
  }

  public static String byte2hex(byte[] b) {
    String hs = "";
    String stmp = "";
    for (int n = 0; n < b.length; n++) {
      stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
      if (stmp.length() == 1) {
        hs = hs + "0" + stmp;
      } else {
        hs = hs + stmp;
      }
    }
    return hs.toUpperCase(Locale.CHINESE);
  }

  /**
   * ??????????????????????
   * 
   * @param email
   * @return
   */
  public static boolean isEmail(String email) {
    if (email == null || email.trim().length() == 0)
      return false;
    return EMAIL_PATTERN.matcher(email).matches();
  }
}
Java Source Code List
