标签:
手工发布程序到多个节点,没有做自动同步,偶尔会出现节点程序不一致的情况,所以写了个文件夹比较的小程序,用于对比两个文件夹内文件的不同。
import java.io.File; import java.io.FileInputStream; import java.math.BigInteger; import java.security.MessageDigest; import java.util.HashMap; import java.util.Iterator; import java.util.Map; ? public class DirDiff { ????/** ???? * 获取单个文件的MD5值! ???? * ???? * @param file ???? * @return ???? */ ????public static String getFileMD5(File file) { ????????if (!file.isFile()) { ????????????return null; ????????} ????????MessageDigest digest = null; ????????FileInputStream in = null; ????????byte buffer[] = new byte[1024]; ????????int len; ????????try { ????????????digest = MessageDigest.getInstance("MD5"); ????????????in = new FileInputStream(file); ????????????while ((len = in.read(buffer, 0, 1024)) != -1) { ????????????????digest.update(buffer, 0, len); ????????????} ????????????in.close(); ????????} catch (Exception e) { ????????????e.printStackTrace(); ????????????return null; ????????} ????????BigInteger bigInt = new BigInteger(1, digest.digest()); ????????return bigInt.toString(16); ????} ? ????/** ???? * 获取文件夹中文件的MD5值 ???? * ???? * @param file ???? * @param listChild ???? * ;true递归子目录中的文件 ???? * @return ???? */ ????public static Map<String, String> getDirMD5(File file, boolean listChild) { ????????if (!file.isDirectory()) { ????????????return null; ????????} ????????Map<String, String> map = new HashMap<String, String>(); ????????String md5; ????????File files[] = file.listFiles(); ????????for (int i = 0; i < files.length; i++) { ????????????File f = files[i]; ????????????if (f.isDirectory() && listChild) { ????????????????map.putAll(getDirMD5(f, listChild)); ????????????} else { ????????????????md5 = getFileMD5(f); ????????????????if (md5 != null) { ????????????????????map.put(f.getPath(), md5); ????????????????} ????????????} ????????} ????????return map; ????} ? ????public static void main(String[] args) { ? ????????String dir1 = "D:\\temp\\server1"; ????????String dir2 = "D:\\temp\\server2"; ???????? ????????Map<String, String> map = getDirMD5(new File(dir1), true); ????????Map<String, String> map2 = getDirMD5(new File(dir2), true); ???????? ????????Iterator<String> it = map.keySet().iterator(); ????????while(it.hasNext()){ ????????????String key = it.next(); ????????????String key2 = key.replace(dir1, dir2); ????????????String value = map.get(key); ????????????String value2 = map2.remove(key2); ????????????if(value2 == null){ ????????????????System.out.println(key + " -> " + value + " || 文件不存在" ); ????????????}else if (!value.equals(value2)){ ????????????????System.out.println(key + " -> " + value + " || " + value2 ); ????????????} ????????} ???????? ????????it = map2.keySet().iterator(); ????????while(it.hasNext()){ ????????????String key = it.next(); ????????????System.out.println("文件不存在 || " + key + " -> " + map2.get(key)); ????????} ???????? ????} ? } |
标签:
原文地址:http://www.cnblogs.com/ooobj/p/4270531.html