我已经用谷歌搜索了几个小时,并阅读了很多类似的问题,例如 this和 this . 现在我将我的代码简化为几行,所以问题应该很明显 - 但我仍然无法解决它。
这是我的两个简单类:
package ant;
import my.package.util.exception.UtilTest;
public class Debug {
public static void main(String[] args) {
System.out.println(UtilTest.myTest());
}
}
package my.package.util.exception;
public class UtilTest {
public static boolean myTest(){
return true;
}
}
我构建了 my.package.util.jar 并将其放入项目目录中的目录 lib 中。 现在我运行 ant 构建脚本(见下文)来为 Debug 类构建 jar。构建成功,MANIFEST.MF为:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.9.4
Created-By: 1.8.0_20-b26 (Oracle Corporation)
Main-Class: ant.Debug
Class-Path: lib/my.package.util.jar
末尾有空行。
这是 build.xml:
<?xml version="1.0"?>
<project>
<path id="my.classpath">
<fileset dir="lib/" includes="**/*.jar"/>
<pathelement location="."/>
<pathelement location="bin"/>
</path>
<target name="compile">
<mkdir dir="build/classes"/>
<javac includeantruntime="false" srcdir="src" destdir="build/classes" encoding="UTF-8">
<classpath refid="my.classpath"/>
</javac>
</target>
<target name="jar">
<mkdir dir="build/jar"/>
<jar destfile="build/jar/Debug.jar" basedir="build/classes">
<manifest>
<attribute name="Main-Class" value="ant.Debug"/>
<attribute name="Class-Path" value="lib/my.package.util.jar"/>
<!-- EDIT: to solve the issue, use value="../../lib/my.package.util.jar"/-->
</manifest>
</jar>
</target>
<target name="debug">
<java classpath="${my.classpath}" jar="build/jar/Debug.jar" fork="true">
<arg value="${file}"/>
</java>
</target>
</project>
现在运行“ant debug”,我得到:
debug:
[java] Exception in thread "main" java.lang.NoClassDefFoundError: my/package/util/exception/UtilTest
[java] at ant.Debug.main(Unknown Source)
[java] Caused by: java.lang.ClassNotFoundException: my.package.util.exception.UtilTest
[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
[java] at java.security.AccessController.doPrivileged(Native Method)
[java] at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
[java] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
[java] ... 1 more
[java] Java Result: 1
BUILD SUCCESSFUL
Total time: 1 second
谁能帮忙? :-/
感谢任何提示!
最佳答案
编辑:你不能那样做,因为如果你使用 -jar
参数:
the JAR file is the source of all user classes, and other user class path settings are ignored (source).
关于java - 编译成功,在 ant java 任务中出现 NoClassDefFoundError,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/25915812/