java.lang.NoClassDefFoundError添加類路徑時

代碼：java.lang.NoClassDefFoundError添加類路徑時


import org.apache.commons.codec.binary.Base64; 

import java.io.UnsupportedEncodingException; 
import java.security.InvalidAlgorithmParameterException; 
import java.security.InvalidKeyException; 
import java.security.MessageDigest; 
import java.security.NoSuchAlgorithmException; 
import java.security.NoSuchProviderException; 
import java.security.SecureRandom; 
import java.security.spec.InvalidKeySpecException; 
import java.util.Arrays; 

import javax.crypto.BadPaddingException; 
import javax.crypto.Cipher; 
import javax.crypto.IllegalBlockSizeException; 
import javax.crypto.NoSuchPaddingException; 
import javax.crypto.SecretKey; 
import javax.crypto.SecretKeyFactory; 
import javax.crypto.spec.IvParameterSpec; 
import javax.crypto.spec.PBEKeySpec; 
import javax.crypto.spec.SecretKeySpec; 

public class AESTest 
{ 
    public static void main(String [] args) 
    { 
     String enc = AESEncryptToBase64("000000", "XJ5QJSVMKZGBOQO7HMSIJO5BERW2OYWDVNPM3BH32NLSWUCNJ4FIP3BML7EKUBNO"); 
     System.out.println(enc); 
    } 

    /** 
    * 
    * @param secret 
    * @param cleartext 
    * @return encrypted b64 string 
    */ 
    public static String AESEncryptToBase64(String secret, String clearText) { 
     byte[] rawKey = new byte[32]; 
     java.util.Arrays.fill(rawKey, (byte) 0); 
     byte[] secretBytes = secret.getBytes(); 
     for(int i = 0; i < secretBytes.length; i++){ 
      rawKey[i] = secretBytes[i]; 
     } 

     SecretKeySpec skeySpec = new SecretKeySpec(rawKey, "AES"); 
     try{ 
      Cipher cipher = Cipher.getInstance("AES"); 
      cipher.init(Cipher.ENCRYPT_MODE, skeySpec); 
      byte[] encryptedData = cipher.doFinal(clearText.getBytes()); 
      if(encryptedData == null) return null; 
      // return "l"; 
      return Base64.encodeBase64String(encryptedData); 
     } catch (Exception e){ 
      e.printStackTrace(); 
     } 
     return null;  

    } 
}

編譯和運行：


$ javac -cp "commons-codec-1.7.jar" AESTest.java 
$ java -cp "commons-codec-1.7.jar" AESTest 
Exception in thread "main" java.lang.NoClassDefFoundError: AESTest 
Caused by: java.lang.ClassNotFoundException: AESTest

這裏的Apache的公地編解碼器： http://apache.mirrors.pair.com//commons/codec/binaries/commons-codec-1.7-bin.zip

來源

2012-12-07 daniel

包含'.'到你的classpath中：'java -cp「。：commons-codec-1.7.jar」AESTest' – hoaz

要公平，hoaz評論應該是一個（接受的）響應:-) –

你使用的是什麼java編譯器？我無法用1.6.0_37 –

包括.到您的類路徑：java -cp ".:commons-codec-1.7.jar" AESTest

這將告訴JVM將當前文件夾中的類包含到類路徑中

來源

2012-12-07 16:01:49 hoaz

java.lang.NoClassDefFoundError添加類路徑時

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