Caused by: java.lang.ClassNotFoundException: org.apache.commons....
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2020-08-18
21:03:14
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Caused by: java.lang.ClassNotFoundException:
org.apache.commons.collections.Transformer异常异常
主要介绍了Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.Type异常，文中通过示例代码
介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学
习吧
今天做了一个java对象转Map的例子，执行的时候报错了，如下：
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/collections/Transformer
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at org.apache.commons.beanutils.BeanMap.createTypeTransformers(BeanMap.java:132)
at org.apache.commons.beanutils.BeanMap.<clinit>(BeanMap.java:68)
at com.example2.pojo.PojoToMap.objectToMap(PojoToMap.java:23)
at com.example2.pojo.PojoToMap.main(PojoToMap.java:16)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.Transformer
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 16 more
先贴上本例的主要代码吧：
package com.example2.pojo;
import java.util.Map;
import java.util.Set;
import org.apache.commons.beanutils.BeanMap;
public class PojoToMap {
/**
* @param args
*/
public static void main(String[] args) {
Employee employee = new Employee();
employee.setName("张三");
employee.setAge(30);
Map map;
try {
map = objectToMap(employee);
Set<Map.Entry<String, Object>> set = map.entrySet();
for (Map.Entry<String, Object> entry : set) {
System.out.println(entry.getKey() + " : " + entry.getValue());
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static Map<?, ?> objectToMap(Object obj) {
if (obj == null)
return null;
return new BeanMap(obj);
}
}
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