为什么base64类没有找到代码编译好，并设置类路径
为什么下面的代码给出错误
C： temp> java test -cp commons-codec-1.9.jar auth string：xxx线程“main”中的异常java.lang.NoClassDefFoundError：org / apache / commons / co dec / binary / Base64 at Test.main（Test .java：22）导致：java.lang.ClassNotFoundException：org.apache.commons.codec.binary.Bas在java.net.URLClassLoader上的e64 $ 1.run（URLClassLoader.java:366）在java.net.URLClassLoader $ 1。 java.net.URLClassLoader.findClass（URLClassLoader.java:354）在java.lang.ClassLoader.loadClass（ClassLoader.java:425）处运行（URLClassLoader.java:355）在java.security.AccessController.doPrivileged（Native Method） sun.misc.Launcher $ AppClassLoader.loadClass（Launcher.java:308）at java.lang.ClassLoader.loadClass（ClassLoader.java:358）... 1 more
码
import org.apache.commons.codec.binary.Base64;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
public class Test {
public static void main(String[] args) {
try {
String webPage = "xx";
String name = "xxx";
String password = "xx";
String authString = name + ":" + password;
System.out.println("auth string: " + authString);
byte[] authEncBytes = Base64.encodeBase64(authString.getBytes());
String authStringEnc = new String(authEncBytes);
System.out.println("Base64 encoded auth string: " + authStringEnc);
URL url = new URL(webPage);
URLConnection urlConnection = url.openConnection();
urlConnection.setRequestProperty("Authorization", "Basic " + authStringEnc);
InputStream is = urlConnection.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
int numCharsRead;
char[] charArray = new char[1024];
StringBuffer sb = new StringBuffer();
while ((numCharsRead = isr.read(charArray)) > 0) {
sb.append(charArray, 0, numCharsRead);
}
String result = sb.toString();
System.out.println("*** BEGIN ***");
System.out.println(result);
System.out.println("*** END ***");
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
尝试在类名之前的命令中放置cp标志：
java -cp commons-codec-1.9.jar Test
这是来自java命令：
用法：java [-options] class [args ...]
（执行一个类）
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