4dkankan-fusion/src/main/java/com/fdkankan/fusion/common/util/FileMd5Util.java

package com.fdkankan.fusion.common.util;

import java.io.File;
import java.io.FileInputStream;
import java.security.MessageDigest;

public class FileMd5Util {
    public static final String KEY_MD5 = "MD5";
    public static final String CHARSET_ISO88591 = "ISO-8859-1";

    public FileMd5Util() {
    }

    public static String getFileMD5(File file) {
        if (file.exists() && file.isFile()) {
            MessageDigest digest = null;
            FileInputStream in = null;
            byte[] buffer = new byte[1024];

            try {
                digest = MessageDigest.getInstance("MD5");
                in = new FileInputStream(file);

                while(true) {
                    int len;
                    if ((len = in.read(buffer, 0, 1024)) == -1) {
                        in.close();
                        break;
                    }

                    digest.update(buffer, 0, len);
                }
            } catch (Exception var9) {
                var9.printStackTrace();
                return null;
            }

            byte[] by = digest.digest();
            StringBuffer sbf = new StringBuffer();

            for(int j = 0; j < by.length; ++j) {
                int i = by[j];
                if (i < 0) {
                    i += 256;
                } else if (i < 16) {
                    sbf.append("0");
                }

                sbf.append(Integer.toHexString(i));
            }

            return sbf.toString();
        } else {
            return null;
        }
    }

    public static String getFileMD5(String filepath) {
        File file = new File(filepath);
        return getFileMD5(file);
    }

    public static byte[] encryptMD5(byte[] data) throws Exception {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.update(data);
        return md5.digest();
    }

    public static byte[] encryptMD5(String data) throws Exception {
        return encryptMD5(data.getBytes("ISO-8859-1"));
    }

    public static boolean isSameMd5(File file1, File file2) {
        String md5_1 = getFileMD5(file1);
        String md5_2 = getFileMD5(file2);
        return md5_1.equals(md5_2);
    }

    public static boolean isSameMd5(String filepath1, String filepath2) {
        File file1 = new File(filepath1);
        File file2 = new File(filepath2);
        return isSameMd5(file1, file2);
    }

    public static void main(String[] args) {
        System.out.println("obj1: " + getFileMD5(new File("F:\\桌面\\c11m-T11-EA\\log\\i6VhiQ2Q-copy.obj")));
        System.out.println("obj: " + getFileMD5(new File("F:\\桌面\\c11m-T11-EA\\log\\i6VhiQ2Q.obj")));
    }
}