我在运行阶段遇到有关类路径的错误。错误是
run:
[java] java.lang.NoClassDefFoundError: org/openqa/selenium/WebDriver
[java] at java.lang.Class.getDeclaredMethods0(Native Method)
[java] at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
[java] at java.lang.Class.privateGetMethodRecursive(Unknown Source)
[java] at java.lang.Class.getMethod0(Unknown Source)
[java] at java.lang.Class.getMethod(Unknown Source)
[java] at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
[java] at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
[java] Caused by: java.lang.ClassNotFoundException: org.openqa.selenium.WebDriver
[java] at java.net.URLClassLoader.findClass(Unknown Source)
[java] at java.lang.ClassLoader.loadClass(Unknown Source)
[java] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
[java] at java.lang.ClassLoader.loadClass(Unknown Source)
[java] ... 7 more
[java] Error: A JNI error has occurred, please check your installation and try again
[java] Exception in thread "main"
[java] Java Result: 1
BUILD SUCCESSFUL
Total time: 1 second
这是我编写的xml构建代码。我正在引用RunningPower jars文件夹，并且我相信可以编译的文件夹是正确的。我的基本目录还包含.classpath和.project文件，但不确定它们是否重要。
<?xml version="1.0" ?>
<project name="SeleniumProjectDataDriven" basedir="." default="run">
<target name="init">
<property name="src.dir" value="src" />
<property name="build.dir" value="build" />
<property name="classes.dir" value="${build.dir}/class" />
<property name="lib.dir" value="RunningPowerJars" />
</target>
<target name="clean" depends="init">
<delete dir="build"/>
</target>
<target name="compile" description="Compiles the code" depends="clean" >
<mkdir dir="${classes.dir}" />
<javac srcdir="${src.dir}" destdir="${classes.dir}" includeantruntime="false">
<classpath>
<fileset dir="${lib.dir}">
<include name="**/*.jar" />
</fileset>
</classpath>
</javac>
</target>
<target name="jar" description="Packages the code into jar" depends="compile">
<mkdir dir="build/jar"/>
<jar destfile="build/jar/RunningPower.jar" basedir="build/class">
<manifest>
<attribute name="Main-Class" value="RunningPower"/>
</manifest>
</jar>
</target>
<target name="run" description="Run the jar file" depends="jar" >
<java jar="build/jar/RunningPower.jar" fork="true"/>
</target>
</project>
在我的RunningPowerJars文件夹中，它们包含
junit-4.8.1.jar
ojdbc6.jar
poi-3.7-20101029.jar
selenium-java-2.46.0.jar
selenium-server-standalone-2.46.0.jar
testng-6.1.1.jar
更新(PST 8/21/2015 7:32)
<target name="run" description="Run the jar file" depends="jar" >
<java jar="build/jar/RunningPower.jar" fork="true">
<classpath>
<fileset dir="${lib.dir}">
<include name="**/*.jar" />
</fileset>
</classpath>
</java>
</target>
我修改了代码，但遇到另一个错误。
BUILD FAILED
C:\Users\dt208672\Perforce\depot\ebill\Automation\Selenium_eBill\RunningPower\build.xml:37: Problem: failed to create task or type classpath
Cause: The name is undefined.
Action: Check the spelling.
Action: Check that any custom tasks/types have been declared.
Action: Check that any <presetdef>/<macrodef> declarations have taken place.
最佳答案
运行Jar文件时，也需要类路径，以便JVM可以找到库类。但是，在jar任务中使用java属性时，“所有类路径设置都将被忽略”(请参阅https://ant.apache.org/manual/Tasks/java.html)。最简单的方法是指定主类，然后将已编译的Jar与RunningPowerJars目录中的库Jar一起添加:
<target name="run" description="Run the jar file" depends="jar" >
<java classname="RunningPower" fork="true">
<classpath>
<pathelement location="build/jar/RunningPower.jar"/>
<fileset dir="${lib.dir}">
<include name="**/*.jar" />
</fileset>
</classpath>
</java>
</target>
一个不相关的说明是，您可以在整个构建文件中使用
init中定义的属性。例如，在jar目标中，您可以使用${classes.dir}而不是重复build/class。使用
classpath属性时，如果将java元素添加到jar任务中，为什么构建会失败，这仍然没有意义。尽管它被忽略，但是很奇怪，它失败并显示“无法创建任务或类型”错误。