56 lines
1.7 KiB
Java
56 lines
1.7 KiB
Java
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import java.io.*;
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import java.math.BigInteger;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.ArrayList;
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public class Helpers {
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// Lesen einer Textdatei in ein Stringarray
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public static String[] readTextdatei(String name) {
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String line;
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ArrayList<String> result = new ArrayList<String>();
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try {
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FileReader fr = new FileReader(name);
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BufferedReader br = new BufferedReader(fr);
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while ((line = br.readLine()) != null)
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result.add(line);
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br.close();
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}
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catch (IOException e) {
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e.printStackTrace();
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}
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return result.toArray(new String[]{});
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}
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// Schreiben eines Stringarray in eine Textdatei
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public static void writeTextdatei(String name, String[] lines) {
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try {
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FileWriter fw = new FileWriter(name);
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BufferedWriter bw = new BufferedWriter(fw);
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PrintWriter pw = new PrintWriter(bw);
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for (int i = 0; i < lines.length; i++)
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pw.println(lines[i]);
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pw.close();
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}
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catch (IOException e) {
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e.printStackTrace();
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}
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}
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// Berechnen des Hashwerts zu einem String und
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// Rückgabe als Hex-Zeichenkette
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public static String getHash(String w) {
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try {
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byte[] bytesOfMessage = w.getBytes("UTF-8");
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MessageDigest md = MessageDigest.getInstance("MD5");
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byte[] thedigest = md.digest(bytesOfMessage);
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return String.format("%032x", new BigInteger(1, thedigest));
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} catch (UnsupportedEncodingException | NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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return null;
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}
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}
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