Question

我一直在关注一些示例源代码但是我在执行ftp任务时遇到错误。这是我的build.xml文件：

?xml version="1.0"?>
<project name="HelloWorld" default="deploy">
  <target name="init">
    <mkdir dir="build/classes" />
    <mkdir dir="dist" />
  </target>
  <target name="compile" depends="init">
    <javac includeantruntime="false"
      srcdir="src"
      destdir="build/classes"/>
  </target>
  <target name="doc" depends="init">
    <javadoc destdir="build/classes"
      sourcepath="src"
      packagenames="org.*" />
  </target>
  <target name="package" depends="compile,doc">
    <jar destfile="dist/project.jar"
      basedir="build/classes" />
  </target>
  <taskdef name="ftp" classname="org.apache.tools.ant.taskdefs.optional.net.FTP">
    <classpath>
      <pathelement location="/usr/local/ant/lib/ant-commons-net.jar"/>
    </classpath>
  </taskdef>
  <target name="deploy" depends="package">
    <ftp classname="org.apache.tools.ant.taskdefs.optional.net.FTP"
      server="${server.name}"
      userid="${ftp.username}"
      password="${ftp.password}">
      <fileset dir="dist" />
    </ftp>
  </target>
</project>

以下是一些设置：

$ ant -version
Apache Ant(TM) version 1.9.0 compiled on March 5 2013
$ echo $ANT_HOME
/usr/local/ant
$ ls -l $ANT_HOME
lrwxrwxrwx 1 root root 17 May 20 11:54 /usr/local/ant -> apache-ant-1.9.0/

这是我得到的错误的输出。我认为ant build文件应该是可移植的。这里有什么问题？不知何故，“Ant”FTP任务查找来自类的类名不与蚂蚁分发。我试着指点与蚂蚁分发的班级任务似乎还没有找到相应的类到它正在寻找的ftp任务。

Buildfile: /home/johndoe/ex/build.xml

init:

compile:

doc:
  [javadoc] Generating Javadoc
  [javadoc] Javadoc execution
  [javadoc] Loading source files for package org.example.helloworld...
  [javadoc] Constructing Javadoc information...
  [javadoc] Standard Doclet version 1.7.0_21
  [javadoc] Building tree for all the packages and classes...
  [javadoc] Building index for all the packages and classes...
  [javadoc] Building index for all classes...

package:
      [jar] Building jar: /home/johndoe/ex/dist/project.jar

deploy:

BUILD FAILED
/home/johndoe/ex/build.xml:30: Could not create type ftp due to java.lang.NoClassDefFoundError: org/apache/commons/net/ftp/FTPClientConfig
    at org.apache.tools.ant.taskdefs.optional.net.FTP$LanguageCode.getValidLanguageCodes(FTP.java:2698)
    at org.apache.tools.ant.taskdefs.optional.net.FTP$LanguageCode.<clinit>(FTP.java:2694)
    at org.apache.tools.ant.taskdefs.optional.net.FTP.<init>(FTP.java:137)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at org.apache.tools.ant.AntTypeDefinition.innerCreateAndSet(AntTypeDefinition.java:328)
    at org.apache.tools.ant.AntTypeDefinition.createAndSet(AntTypeDefinition.java:274)
    at org.apache.tools.ant.AntTypeDefinition.icreate(AntTypeDefinition.java:219)
    at org.apache.tools.ant.AntTypeDefinition.create(AntTypeDefinition.java:206)
    at org.apache.tools.ant.ComponentHelper.createComponent(ComponentHelper.java:285)
    at org.apache.tools.ant.ComponentHelper.createComponent(ComponentHelper.java:263)
    at org.apache.tools.ant.UnknownElement.makeObject(UnknownElement.java:417)
    at org.apache.tools.ant.UnknownElement.maybeConfigure(UnknownElement.java:163)
    at org.apache.tools.ant.Task.perform(Task.java:347)
    at org.apache.tools.ant.Target.execute(Target.java:435)
    at org.apache.tools.ant.Target.performTasks(Target.java:456)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
    at org.apache.tools.ant.Main.runBuild(Main.java:851)
    at org.apache.tools.ant.Main.startAnt(Main.java:235)
    at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
    at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.net.ftp.FTPClientConfig
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    ... 26 more

Total time: 2 seconds

理想情况下，我不应该下载其他类来让ant工作。这应该开箱即用，否则不便携。另外，如果有人可以帮助我下载缺少它的类的位置很有帮助。

感谢。

Answer 1

我可以通过下载commons-net-3.2-bin.tar.gz解决问题来自http://commons.apache.org/proper/commons-net/download_net.cgi 并将commons-net-3.2.jar安装到我的/ usr / local / ant / lib文件夹中。

问候。

Answer 2

根据https://ant.apache.org/manual/Tasks/ftp.html，您需要安装Apache Commons Net和Jakarta Oro。

将这些罐子复制到你的\ lib目录，正如Jason Posit所说。

如果您使用的是Eclipse，则可能需要更新Ant构建路径。转到“首选项”＆gt; “Ant”＆gt; “运行时间”＆gt; “添加外部JAR”将这些库添加到Ant构建路径中。

Answer 3

如果你在Raspberry Pi上使用Debian Linux发行版或Raspbian，你可以通过运行来解决这个问题：

sudo apt-get install libcommons-net-java

Answer 4

有同样的问题。当我使用ant-1.9.1而不是ant-1.8.2时，它发生在我身上。

切换ant版本修复它。

Answer 5

对我有用的步骤

导航到安装Jenkins的文件夹

jenkins>>tools>>hudson.tasks.Ant_AntInstallation>>(ANT VERSION Installed)>>lib

放置以下文件＆amp;重启詹金斯

公地净3.3.jar
公地净3.4.jar
雅加达-oro.jar这两个

ant：由于NoClassDefFoundError导致ftp任务失败

5 个答案: