线程“main”java.lang.NoClassDefFoundError中的异常

时间：2013-06-27 23:16:52

标签： java

尝试运行Java示例应用程序时出现异常异常。

以下是来自控制台的堆栈跟踪：

    $./init-og-examples-db.sh
        Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/tools/ant/Task
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.Task
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 13 more
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/tools/ant/Task
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.Task
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 13 more
### Adding example data
Error: Could not find or load main class com.opengamma.examples.tool.ExampleDatabasePopulator
### Completed

我对Java比较新，所以我不确定为什么没有找到这个类，因为该类确实存在：

someone@yourbox:~/work/dev/java/OG-Platform/projects/OG-Examples/scripts$ find ../../.. -type f -name 'ExampleDatabasePopulator.*'
../../../projects/OG-Examples/bin/com/opengamma/examples/tool/ExampleDatabasePopulator.class
../../../projects/OG-Examples/build/classes/com/opengamma/examples/tool/ExampleDatabasePopulator.class
../../../projects/OG-Examples/src/main/java/com/opengamma/examples/tool/ExampleDatabasePopulator.java
../../../projects/OG-BloombergExample/bin/com/opengamma/bloombergexample/tool/ExampleDatabasePopulator.class
../../../projects/OG-BloombergExample/build/classes/com/opengamma/bloombergexample/tool/ExampleDatabasePopulator.class
../../../projects/OG-BloombergExample/src/main/java/com/opengamma/bloombergexample/tool/ExampleDatabasePopulator.java

任何人都可以帮我解决这个问题吗？

[更新]

我做了以下事情：

1。在我的机器上删除并手动安装了蚂蚁

2。搜索包含单词Task的.jar文件（试图找到实现Task类的文件）

grep -lri Task --include=*.jar /usr/local/apache-ant-1.9.1
/usr/local/apache-ant-1.9.1/lib/ant-netrexx.jar
/usr/local/apache-ant-1.9.1/lib/ant-jdepend.jar
/usr/local/apache-ant-1.9.1/lib/ant-javamail.jar
/usr/local/apache-ant-1.9.1/lib/ant-junit.jar
/usr/local/apache-ant-1.9.1/lib/ant-jsch.jar
/usr/local/apache-ant-1.9.1/lib/ant-apache-xalan2.jar
/usr/local/apache-ant-1.9.1/lib/ant-junit4.jar
/usr/local/apache-ant-1.9.1/lib/ant-jmf.jar
/usr/local/apache-ant-1.9.1/lib/ant.jar
/usr/local/apache-ant-1.9.1/lib/ant-testutil.jar
/usr/local/apache-ant-1.9.1/lib/ant-jai.jar
/usr/local/apache-ant-1.9.1/lib/ant-commons-net.jar
/usr/local/apache-ant-1.9.1/lib/ant-antlr.jar
/usr/local/apache-ant-1.9.1/lib/ant-swing.jar

3. 将相关文件夹添加到我的CLASSPATH

  

出口   CLASSPATH = $ CLASSPATH：/usr/local/apache-ant-1.9.1/etc：/usr/local/apache-ant-1.9.1/lib

4. 确保我正确设置了JAVA_HOME和ANT_HOME 

echo $ANT_HOME
/usr/local/apache-ant-1.9.1
echo $JAVA_HOME
/usr/lib/jvm/java-7-oracle/jre

尽管如此，我得到的错误与以前完全相同（即堆栈跟踪与上述相同）。

[第二次更新]

这是我正在运行的脚本文件的内容：

#!/bin/sh

if [ ! -z "$JAVA_HOME" ]; then
  JAVA=$JAVA_HOME/bin/java
elif [ -x /opt/jdk1.6.0_16/bin/java ]; then
  JAVA=/opt/jdk1.6.0_16/bin/java
else
  # No JAVA_HOME, try to find java in the path
  JAVA=`which java 2>/dev/null`
  if [ ! -x "$JAVA" ]; then
    # No java executable in the path either
    echo "Error: Cannot find a JRE or JDK. Please set JAVA_HOME"
    exit 1
  fi
fi

if [ "`basename $0`" = "init-og-examples-db.sh" ] ; then
  cd `dirname $0`/.. #PLAT-1527
fi

CLASSPATH=config:og-examples.jar
for FILE in `ls -1 lib/*` ; do
  CLASSPATH=$CLASSPATH:$FILE
done

echo "### Creating empty database"

$JAVA  -cp "$CLASSPATH" \
  -Dlogback.configurationFile=jetty-logback.xml \
  com.opengamma.util.test.DbTool \
  -jdbcUrl jdbc:hsqldb:file:install/db/hsqldb/example-db \
  -database og-financial \
  -user "OpenGamma" \
  -password "OpenGamma" \
  -drop true \
  -create true \
  -createtables true \
  -dbscriptbasedir .

$JAVA  -cp "$CLASSPATH" \
  -Dlogback.configurationFile=jetty-logback.xml \
  com.opengamma.util.test.DbTool \
  -jdbcUrl jdbc:hsqldb:file:temp/hsqldb/og-fin-user \
  -database og-financial \
  -user "OpenGamma" \
  -password "OpenGamma" \
  -drop true \
  -create true \
  -createtables true \
  -dbscriptbasedir .

echo "### Adding example data"

$JAVA  -cp "$CLASSPATH" \
  -Xms512M \
  -Xmx1024M \
  -Dlogback.configurationFile=jetty-logback.xml \
  com.opengamma.examples.tool.ExampleDatabasePopulator

echo "### Completed"

3 个答案:

答案 0 :(得分：4)

请注意，CLASSPATH对您的执行无效。您的CLASSPATH必须

export CLASSPATH=$CLASSPATH:/usr/local/apache-ant-1.9.1/etc:/usr/local/apache-ant-1.9.1/lib/ant-netrexx.jar:/usr/local/apache-ant-1.9.1/lib/ant-jdepend.jar:/usr/local/apache-ant-1.9.1/lib/ant-javamail.jar:/usr/local/apache-ant-1.9.1/lib/ant-junit.jar:/usr/local/apache-ant-1.9.1/lib/ant-jsch.jar:/usr/local/apache-ant-1.9.1/lib/ant-apache-xalan2.jar:/usr/local/apache-ant-1.9.1/lib/ant-junit4.jar:/usr/local/apache-ant-1.9.1/lib/ant-jmf.jar:/usr/local/apache-ant-1.9.1/lib/ant.jar:/usr/local/apache-ant-1.9.1/lib/ant-testutil.jar:/usr/local/apache-ant-1.9.1/lib/ant-jai.jar:/usr/local/apache-ant-1.9.1/lib/ant-commons-net.jar:/usr/local/apache-ant-1.9.1/lib/ant-antlr.jar:/usr/local/apache-ant-1.9.1/lib/ant-swing.jar

如果仅命名目录，则仅包含目录中的.class个文件。

.jar个文件必须在CLASSPATH中明确命名，因为它们不会自动包含在内。

答案 1 :(得分：1)

ant罐似乎不见了。您可以从here将它们下载到类路径中。

答案 2 :(得分：0)

在某些情况下，最后添加:.即可。例如：

export CLASSPATH=$CLASSPATH:/usr/local/apache-ant-1.9.1/etc:/usr/local/apache-ant-1.9.1/lib/ant-netrexx.jar:.

相关问题
最新问题