java - cmd中base64编译错误

Question

我尝试使用 cmd 编译小程序，但收到以下错误:

Mc.java:1: error: package org.apache.commons.codec.binary does not exist
import org.apache.commons.codec.binary.Base64;
                                  ^
Mc.java:279: error: cannot find symbol
    byte[] accountKeyBytes = Base64.encodeBase64((accountKey + ":" + accountKey).getBytes());
                             ^
symbol:   variable Base64
location: class Mc
2 errors

知道如何解决这个问题吗？

使用 jar 文件编译后，出现错误:

 Exception in thread "AWT-EventQueue-1" java.lang.NoClassDefFoundError: org/apach
 e/commons/codec/binary/Base64
    at Mc.SearchApi(Mc.java:279)
    at Mc$ButtonHandler.keyPressed(Mc.java:172)
    at java.awt.Component.processKeyEvent(Component.java:6463)
    at javax.swing.JComponent.processKeyEvent(JComponent.java:2829)
    at java.awt.Component.processEvent(Component.java:6282)
    at java.awt.Container.processEvent(Container.java:2229)
    at java.awt.Component.dispatchEventImpl(Component.java:4861)
    at java.awt.Container.dispatchEventImpl(Container.java:2287)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895)
    at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
    at   java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
    at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeybo
    ardFocusManager.java:899)...

Answer 1

此错误是您的项目中缺少库文件。您只需下载 apache jar 文件并将其设置到您的 java 类路径中即可。

commons-codec-x.x.jar

如果您仍然怀疑是否将 jar 文件设置到类路径中，可以通过以下链接进行查找。

Adding jar to classpath when running from command line
Including jars in classpath on commandline (javac or apt)