NoClassDefFoundError...Base64 에러...

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javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/commons/codec/binary/Base64안녕하세요 지금 html과 톰캣을 이용해서 웹페이지 만들기 과제를 하고있는 대학생입니다.웹페이지에다가 AES256 암호화를 시키려고 하고있습니다. 그래서 지금 JSP에 값을 JAVA에서 암호화해서 다시 받아오는 식으로 하고있습니다.문제는 테스트 할때 JAVA 클래스를 두개 만들어서 서로 할때는 잘 작동을하는데 JSP에서 할때는저 오류가 뜹니다.ㅜㅜ 아래는 자바 소스입니다. 굵은 글씨 까지가 실행 되는 구간입니다. package util;import java.io.UnsupportedEncodingException;import java.security.InvalidAlgorithmParameterException;import java.security.InvalidKeyException;import java.security.Key;import java.security.NoSuchAlgorithmException;import javax.crypto.BadPaddingException;import javax.crypto.Cipher;import javax.crypto.IllegalBlockSizeException;import javax.crypto.NoSuchPaddingException;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;import org.apache.commons.codec.binary.Base64; public class AES256Util { private String iv; private Key keySpec; public AES256Util(String key) throws UnsupportedEncodingException { System.out.println(&#34;넘어온 키 : &#34; &#43; key); this.iv &#61; key.substring(0, 16); byte[] keyBytes &#61; new byte[16]; byte[] b &#61; key.getBytes(&#34;UTF-8&#34;); int len &#61; b.length; if(len > keyBytes.length) len &#61; keyBytes.length; System.arraycopy(b, 0, keyBytes, 0, len); SecretKeySpec keySpec &#61; new SecretKeySpec(keyBytes, &#34;AES&#34;); this.keySpec &#61; keySpec; } // 암호화 public String aesEncode(String str) throws java.io.UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException{ Cipher c &#61; Cipher.getInstance(&#34;AES/CBC/PKCS5Padding&#34;); c.init(Cipher.ENCRYPT_MODE, keySpec, new IvParameterSpec(iv.getBytes())); System.out.println(&#34;넘어온 uuid : &#34; &#43; str); byte[] encrypted &#61; c.doFinal(str.getBytes(&#34;UTF-8&#34;)); System.out.println(&#34;암호화&#34;); String enStr &#61; new String(Base64.encodeBase64(encrypted)); System.out.println(&#34;AES256 암호화 : &#34;&#43;enStr); return enStr; } //복호화 public String aesDecode(String str) throws java.io.UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException { Cipher c &#61; Cipher.getInstance(&#34;AES/CBC/PKCS5Padding&#34;); c.init(Cipher.DECRYPT_MODE, keySpec, new IvParameterSpec(iv.getBytes(&#34;UTF-8&#34;))); byte[] byteStr &#61; Base64.decodeBase64(str.getBytes()); return new String(c.doFinal(byteStr),&#34;UTF-8&#34;); }} jsp부분에서 스크립트릿 속에 String encText &#61; aes256.aesEncode(uuid); 이 문구를 넣어서 encText에 암호문을 받아오고 싶은데 넘어가서 오질 않습니다.자바로 테스트를 할때는 작동을하는데 왜 JSP와 자바로 같이 테스트 할때는 작동을 안하는 걸까요아래는 콜솔창 빨간 글씨 입니다. 심각: Servlet.service() for servlet [jsp] in context with path [/JSPTest001] threw exception [javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/commons/codec/binary/Base64] with root cause java.lang.ClassNotFoundException: org.apache.commons.codec.binary.Base64 at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1274) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1108) at util.AES256Util.aesEncode(AES256Util.java:44) at org.apache.jsp.JoinCheck_jsp._jspService(JoinCheck_jsp.java:151) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:443) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:522) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1110) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Unknown Source)

asuraho · Answer

class path 문제이네요

NoClassDefFoundError...Base64 에러...

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