java 获取文件md5值(用于检测文件完整性)

此实例是java版本，C#版本在这里 
https://www.haolizi.net/example/view_16702.html

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

public class FileMd5Demo {

    public static void main(String[] args) {
        File file= new File("D:\\Projects\\BullSoftProjects\\smarthome\\smarthome_pictureframe\\app\\release\\app-release.apk");
        System.out.println("文件的md5: "   md5(file));
    }

    public static String md5(File file) {
        MessageDigest digest = null;
        FileInputStream fis = null;
        byte[] buffer = new byte[1024];

        try {
            if (!file.isFile()) {
                return "";
            }

            digest = MessageDigest.getInstance("MD5");
            fis = new FileInputStream(file);

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

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

        BigInteger var5 = new BigInteger(1, digest.digest());
        return String.format("%1$032x", new Object[]{var5});
    }

}

资源下载

此资源下载价格为3D币（VIP免费），请先登录

资源文件列表

.idea/libraries/commons_codec_commons_codec_1_1.xml , 360
.idea/libraries/org_bouncycastle_bcmail_jdk14_1_51.xml , 581
.idea/misc.xml , 454
.idea/modules.xml , 262
.idea/uiDesigner.xml , 8792
.idea/workspace.xml , 38339
FileMd5Demo.iml , 661
out/production/FileMd5Demo/FileMd5Demo.class , 1969
src/FileMd5Demo.java , 1265