请教一下
小弟有一个ViewLDAPDirectory.java档案
在执行javac ViewLDAPDirectory.java后，出现如下错误讯息：
ViewLDAPDirectoryID.java:6: error: package org.apache.commons.lang does
not exist
import org.apache.commons.lang.StringUtils;
^
ViewLDAPDirectoryID.java:7: error: package org.apache.log4j does not exist
import org.apache.log4j.Logger;
^
ViewLDAPDirectoryID.java:9: error: package com.atlassian.jira.issue does
not exist
import com.atlassian.jira.issue.CustomFieldManager;
是少了某些package吗，该怎么解决这个问题？