由于java.lang.NullPointerException导致的BeanInstationException异常

我正在运行基于注释的配置项目，例如：

@Configuration
public class HibernateConfig {

    private Map<String, String> map;

    public HibernateConfig(){
        init();
    }

    private void init(){
        Properties props;
        InputStream input = null;
        try {
            props = new Properties();
            input = this.getClass().getClassLoader().getResourceAsStream("jdbc.properties");
            props.load(input);
            Enumeration<?> e = props.propertyNames();
            while (e.hasMoreElements()) {
                String key = (String) e.nextElement();
                String value = props.getProperty(key);
                map.put(key, value);
            }
        } catch (IOException e1) {
            e1.printStackTrace();
        } finally{
            if(input!=null){
                try {
                    input.close();
                } catch (IOException e2) {
                    e2.printStackTrace();
                }
            }
        }
    }

    @Bean(name="dataSource", destroyMethod = "close")
    public DataSource getDataSource(){  
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        try {
            dataSource.setDriverClass(map.get("db.driverClass"));
            dataSource.setJdbcUrl(map.get("db.jdbcUrl"));
            dataSource.setUser(map.get("db.user"));
            dataSource.setPassword(map.get("db.password"));
            dataSource.setMaxPoolSize(50);
            dataSource.setMinPoolSize(5);
            dataSource.setMaxConnectionAge(1800);
            dataSource.setMaxIdleTime(1800);
            dataSource.setAutoCommitOnClose(false);
            dataSource.setInitialPoolSize(5);
        } catch (PropertyVetoException e) {
            e.printStackTrace();
        }
        return dataSource;
    }

    @Bean(name="sessionFactory")
    @Scope("singleton")
    public  FactoryBean<SessionFactory> getSessionFactory(@Qualifier("dataSource") javax.sql.DataSource dataSource){
        LocalSessionFactoryBean localSessionFactoryBean = new LocalSessionFactoryBean();
        Properties hibernateProperties = new Properties();
        hibernateProperties.setProperty("hibernate.dialect", map.get("db.dialect"));
        hibernateProperties.setProperty("hibernate.jdbc.batch_size", "0");
        hibernateProperties.setProperty("c3p0.acquire_increment", "1");
        localSessionFactoryBean.setHibernateProperties(hibernateProperties);
        try {
            localSessionFactoryBean.afterPropertiesSet();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return localSessionFactoryBean;
    }

    @Bean(name="transactionManager")
    public HibernateTransactionManager getTransactionManager(@Qualifier("sessionFactory") SessionFactory sessionFactory){
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        return transactionManager;
    }

    public Map<String, String> getMap() {
        return map;
    }

    public void setMap(Map<String, String> map) {
        this.map = map;
    }
}

@配置
公共类HibernateConfig{
私人地图；
公共HibernateConfig（）{
init（）；
}
私有void init（）{
属性道具；
InputStream输入=null；
试一试{
props=新属性（）；
输入=this.getClass（）.getClassLoader（）.getResourceAsStream（“jdbc.properties”）；
道具加载（输入）；
枚举e=props.propertyNames（）；
而（e.hasMoreElements（））{
字符串键=（字符串）e.nextElement（）；
字符串值=props.getProperty（键）；
map.put（键、值）；
}
}捕获（IOE1异常）{
e1.printStackTrace（）；
}最后{
如果（输入！=null）{
试一试{
input.close（）；
}捕获（IOE2异常）{
e2.printStackTrace（）；
}
}
}
}
@Bean（name=“dataSource”，destromethod=“close”）
公共数据源getDataSource（）{
ComboPooledDataSource=新ComboPooledDataSource（）；
试一试{
setDriverClass（map.get（“db.driverClass”）；
setJdbcUrl（map.get（“db.jdbcUrl”）；
setUser（map.get（“db.user”）；
setPassword（map.get（“db.password”）；
dataSource.setMaxPoolSize（50）；
dataSource.setMinPoolSize（5）；
dataSource.setMaxConnectionAge（1800）；
dataSource.setMaxIdleTime（1800）；
dataSource.setAutoCommitOnClose（false）；
dataSource.setInitialPoolSize（5）；
}捕获（PropertyVetOe异常）{
e、 printStackTrace（）；
}
返回数据源；
}
@Bean（name=“sessionFactory”）
@范围（“单例”）
public FactoryBean getSessionFactory（@Qualifier（“dataSource”）javax.sql.dataSource dataSource）{
LocalSessionFactoryBean LocalSessionFactoryBean=新的LocalSessionFactoryBean（）；
Properties hibernateProperties=新属性（）；
setProperties（“hibernate.dialogue”，map.get（“db.dialogue”）；
setProperties（“hibernate.jdbc.batch_size”，“0”）；
hibernateProperties.setProperty（“c3p0.acquire_increment”，“1”）；
setHibernateProperties（hibernateProperties）；
试一试{
localSessionFactoryBean.AfterPropertieSet（）；
}捕获（IOE异常）{
e、 printStackTrace（）；
}
返回localSessionFactoryBean；
}
@Bean（name=“transactionManager”）
公共HibernateTransactionManager getTransactionManager（@Qualifier（“sessionFactory”）sessionFactory sessionFactory）{
HibernateTransactionManager transactionManager=新的HibernateTransactionManager（）；
返回事务管理器；
}
公共地图getMap（）{
返回图；
}
公共无效集合映射（映射映射）{
this.map=map；
}
}

stackrace的输出给我以下异常：

ERROR ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com..web.config.HibernateConfig#0' defined in class path resource [META-INF/spring/daoContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1105)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1050)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1098)
    ... 22 more
Caused by: java.lang.NullPointerException
    at java.util.Properties$LineReader.readLine(Properties.java:434)
    at java.util.Properties.load0(Properties.java:353)
    at java.util.Properties.load(Properties.java:341)
    at com..web.config.HibernateConfig.init(HibernateConfig.java:35)
    at com..web.config.HibernateConfig.<init>(HibernateConfig.java:26)
    at com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b.<init>(<generated>)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
    ... 24 more
Jun 16, 2017 2:55:14 PM org.apache.catalina.core.StandardContext listenerStart
SCHWERWIEGEND: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com..web.config.HibernateConfig#0' defined in class path resource [META-INF/spring/daoContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1105)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1050)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1098)
    ... 22 more
Caused by: java.lang.NullPointerException
    at java.util.Properties$LineReader.readLine(Properties.java:434)
    at java.util.Properties.load0(Properties.java:353)
    at java.util.Properties.load(Properties.java:341)
    at com..web.config.HibernateConfig.init(HibernateConfig.java:35)
    at com..web.config.HibernateConfig.<init>(HibernateConfig.java:26)
    at com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b.<init>(<generated>)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
    ... 24 more

INFO  SessionListener - # flyway migration...
Jun 16, 2017 2:55:14 PM org.apache.catalina.core.StandardContext listenerStart
SCHWERWIEGEND: Exception sending context initialized event to listener instance of class com..web.listener.FlywayListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com..web.config.HibernateConfig#0' defined in class path resource [META-INF/spring/daoContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1105)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1050)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1098)
    ... 22 more
Caused by: java.lang.NullPointerException
    at java.util.Properties$LineReader.readLine(Properties.java:434)
    at java.util.Properties.load0(Properties.java:353)
    at java.util.Properties.load(Properties.java:341)
    at com..web.config.HibernateConfig.init(HibernateConfig.java:35)
    at com..web.config.HibernateConfig.<init>(HibernateConfig.java:26)
    at com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b.<init>(<generated>)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
    ... 24 more

错误ContextLoader-上下文初始化失败
org.springframework.beans.factory.BeanCreationException:创建名为'com..web.config.HibernateConfig#0'的bean时出错，该名称在类路径资源[META-INF/spring/daoContext.xml]中定义：bean实例化失败；嵌套异常为org.springframework.beans.beanstantiationException:未能实例化[com..web.config.HibernateConfig$$EnhancerBySpringCGLIB$$49b2842b]：构造函数引发异常；嵌套异常是java.lang.NullPointerException
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.InstanceBean（AbstractAutowireCapableBeanFactory.java:1105）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:1050）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:510）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:482）
位于org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject（AbstractBeanFactory.java:306）
位于org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）
位于org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:302）
位于org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:197）
位于org.springframework.beans.factory.support.DefaultListableBeanFactory.PreInstanceSingleton（DefaultListableBeanFactory.java:772）
位于org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:839）
位于org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:538）
位于org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext（ContextLoader.java:446）
位于org.springframework.web.context.ContextLoader.initWebApplicationContext（ContextLoader.java:328）
位于org.springframework.web.context.ContextLoaderListener.contextInitialized（ContextLoaderListener.java:107）
位于org.apache.catalina.core.StandardContext.listenerStart（StandardContext.java:4939）
位于org.apache.catalina.core.StandardContext.startInternal（StandardContext.java:5434）
位于org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java:150）
位于org.apache.catalina.core.ContainerBase$StartChild.call（ContainerBase.java:1559）
位于org.apache.catalina.core.ContainerBase$StartChild.call（ContainerBase.java:1549）
在java.util.concurrent.FutureTask.run（FutureTask.java:266）处
在java.util.concurrent.Thr
@Configuration
@PropertySource("classpath:jdbc.properties")
public class HibernateConfig {

    @Autowired
    private Environment env;

    @Bean
    public DataSource dataSource(){  
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setDriverClass(env.getProperty("db.driverClass"));
        dataSource.setJdbcUrl(env.getProperty("db.jdbcUrl"));
        dataSource.setUser(env.getProperty("db.user"));
        dataSource.setPassword(env.getProperty("db.password"));
        dataSource.setMaxPoolSize(50);
        dataSource.setMinPoolSize(5);
        dataSource.setMaxConnectionAge(1800);
        dataSource.setMaxIdleTime(1800);
        dataSource.setAutoCommitOnClose(false);
        dataSource.setInitialPoolSize(5);
        return dataSource;
    }

    @Bean
    public LocalSessionFactoryBean sessionFactory(DataSource dataSource){
        LocalSessionFactoryBean localSessionFactoryBean = new LocalSessionFactoryBean();
        Properties hibernateProperties = new Properties();
        hibernateProperties.setProperty("hibernate.dialect", map.get("db.dialect"));
        hibernateProperties.setProperty("hibernate.jdbc.batch_size", "0");
        localSessionFactoryBean.setHibernateProperties(hibernateProperties);
        localSessionFactoryBean.setDataSource(dataSource);
        return localSessionFactoryBean;
    }

    @Bean
    public HibernateTransactionManager transactionManager(SessionFactory sessionFactory){
        return new HibernateTransactionManager(sessionFactory);
    }
}