Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.Transformer异常

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.(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 {
 
 
 public static void main(String[] args) {
 Employee employee = new Employee();
 employee.setName("张三");
 employee.setAge(30);
 Map map;
 try {
  map = objectToMap(employee);
  Set> set = map.entrySet();
  for (Map.Entry 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);
 }
}

Employee类：

package com.example2.pojo;
 
public class Employee {
 
 private String name;
 private Integer age;
 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
 public Integer getAge() {
 return age;
 }
 public void setAge(Integer age) {
 this.age = age;
 }
}

从报错信息上看，是缺少了org.apache.commons.collections.Transformer类，网上下载了commons-collections-3.2.1.jar包，引入后，重新执行，成功。

 到此这篇关于Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.Type异常的文章就介绍到这了,更多相关org.objectweb.asm.Type异常内容请搜索考高分网以前的文章或继续浏览下面的相关文章希望大家以后多多支持考高分网！