Error: No default constructor found; nested exception is java.lang.NoClassDefFoundError: com/mchange/v2/ser/Indirector

Main：

package com.atguigu.spring.beans.properties;



import java.sql.SQLException;



import javax.sql.DataSource;



import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;



public class Main {

 

 public static void main(String[] args) throws SQLException {

  

  ApplicationContext ctx = new ClassPathXmlApplicationContext("beans-properties.xml");

  

  DataSource dataSource = (DataSource) ctx.getBean("dataSource");

  System.out.println(dataSource.getConnection());

 }

}

beans-properties.xml：

xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">



 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

  <property name="user" value="root"></property>

  <property name="password" value="1230"></property>

  <property name="driverClass" value="com.mysql.jdbc.Driver"></property>

  <property name="jdbcUrl" value="jdbc:mysql:///test"></property>

 </bean>

</beans>

報錯：

四月 11, 2020 9:29:54 下午 org.springframework.context.support.ClassPathXmlApplicationContext refresh

警告: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [beans-properties.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.mchange.v2.c3p0.ComboPooledDataSource]: No default constructor found; nested exception is java.lang.NoClassDefFoundError: com/mchange/v2/ser/Indirector

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [beans-properties.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.mchange.v2.c3p0.ComboPooledDataSource]: No default constructor found; nested exception is java.lang.NoClassDefFoundError: com/mchange/v2/ser/Indirector

 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1320)

 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1214)

 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557)

 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)

 at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)

 at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)

 at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)

 at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)

 at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879)

 at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)

 at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)

 at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:144)

 at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:85)

 at com.atguigu.spring.beans.properties.Main.main(Main.java:14)

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.mchange.v2.c3p0.ComboPooledDataSource]: No default constructor found; nested exception is java.lang.NoClassDefFoundError: com/mchange/v2/ser/Indirector

 at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:83)

 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1312)

 ... 13 more

Caused by: java.lang.NoClassDefFoundError: com/mchange/v2/ser/Indirector

 at java.lang.Class.getDeclaredConstructors0(Native Method)

 at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)

 at java.lang.Class.getConstructor0(Class.java:3075)

 at java.lang.Class.getDeclaredConstructor(Class.java:2178)

 at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:78)

 ... 14 more

Caused by: java.lang.ClassNotFoundException: com.mchange.v2.ser.Indirector

 at java.net.URLClassLoader.findClass(URLClassLoader.java:382)

 at java.lang.ClassLoader.loadClass(ClassLoader.java:418)

 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)

 at java.lang.ClassLoader.loadClass(ClassLoader.java:351)

 ... 19 more

解決方式：

少放了mchange-common-java-x.x.x.jar