Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import android.text.TextUtils;
import android.util.Log;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    private static final String TAG = "WXUtil";
    private static final char HEX_DIGITS[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
            'e', 'f' };
    private static final Pattern sPattern = Pattern.compile(".*filename=(.+?)&.*thumbnail=(.+?)&");

    public static String getMD5FileName(String filePathName) {
        if (!TextUtils.isEmpty(filePathName)) {
            Matcher matcher = sPattern.matcher(filePathName);
            if (matcher.find()) {
                return matcher.group(1) + matcher.group(2);

            }
        }
        return getMD5Value(filePathName);
    }

    public static boolean isEmpty(String str) {
        if (str == null) {
            return true;
        }
        for (int i = 0, length = str.length(); i < length; i++) {
            if (!Character.isWhitespace(str.charAt(i))) {
                return false;
            }
        }
        return true;
    }

    public static String getMD5Value(String str, String fix) {
        return getMD5Value(str, fix, "utf-8");

    }

    public static String getMD5Value(String str, String fix, String charsetName) {
        if (str != null && fix != null) {
            String formalString = str + fix;
            try {
                MessageDigest algorithm = MessageDigest.getInstance("MD5");
                algorithm.reset();
                try {
                    algorithm.update(formalString.getBytes(charsetName));
                } catch (UnsupportedEncodingException e) {
                    // TODO Auto-generated catch block
                    Log.e("WxException", e.getMessage(), e);
                    return null;
                }
                byte messageDigest[] = algorithm.digest();

                return toHexString(messageDigest);
            } catch (NoSuchAlgorithmException e) {
                Log.w(TAG, e);
                Log.e("WxException", e.getMessage(), e);
            }
        }
        return null;

    }

    public static String getMD5Value(String str) {
        return getMD5Value(str, "");
    }

    /**
     * @hide
     * @param b
     * @return
     */
    public static String toHexString(byte[] b) { // String to byte
        StringBuilder sb = new StringBuilder(b.length * 2);
        for (int i = 0; i < b.length; i++) {
            sb.append(HEX_DIGITS[(b[i] & 0xf0) >>> 4]);
            sb.append(HEX_DIGITS[b[i] & 0x0f]);
        }
        return sb.toString();
    }
}