java 使用 commons-beanutils 在 org.apache.commons.logging.LogFactory 上抛出 ClassNotFoundException
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Using commons-beanutils throws ClassNotFoundException on org.apache.commons.logging.LogFactory
提问by darkAngel
I have same code
我有相同的代码
import org.apache.commons.beanutils.PropertyUtils;
public class Reflection {
private double []masElement = {3,5,2,5};
public double getValue(int i){
if (masElement.length>i){
return masElement[i];
}
return 0;
}
public void setValue(int i, int value){
if (masElement.length>i){
masElement[i]=value;
}
}
public static void main(String[] args) {
Reflection n = new Reflection();
try {
System.out.println(PropertyUtils.getProperty(n, "masElement[0]"));
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
I have problem and i don't understand why?
我有问题，我不明白为什么？
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.apache.commons.beanutils.ConvertUtilsBean.<init>(ConvertUtilsBean.java:157)
at org.apache.commons.beanutils.BeanUtilsBean.<init>(BeanUtilsBean.java:117)
at org.apache.commons.beanutils.BeanUtilsBean.initialValue(BeanUtilsBean.java:68)
at org.apache.commons.beanutils.ContextClassLoaderLocal.get(ContextClassLoaderLocal.java:153)
at org.apache.commons.beanutils.BeanUtilsBean.getInstance(BeanUtilsBean.java:80)
at org.apache.commons.beanutils.PropertyUtilsBean.getInstance(PropertyUtilsBean.java:114)
at org.apache.commons.beanutils.PropertyUtils.getProperty(PropertyUtils.java:426)
at same.home.reflection.Reflection.main(Reflection.java:39)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at java.net.URLClassLoader.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 8 more
回答by BalusC
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
引起：java.lang.ClassNotFoundException：org.apache.commons.logging.LogFactory
You need to put Apache Commons LoggingJAR file in the classpath as well. The Apache Commons Beanutils is namely using it as one of its dependencies.
您还需要将Apache Commons LoggingJAR 文件放在类路径中。Apache Commons Beanutils 即使用它作为其依赖项之一。
