orafbjaaland 2017-03-20 08:09 采纳率: 50%
浏览 11331

Spring-data-redis的RedisTemplate @Autowared注入为空

最近在学习Spring整合redis,配置了一个项目启动时报错,请各位大神看一下,谢谢啦:


20-Mar-2017 15:33:12.293 INFO [RMI TCP Connection(2)-127.0.0.1] org.apache.catalina.core.ApplicationContext.log No Spring WebApplicationInitializer types detected on classpath
20-Mar-2017 15:33:12.324 INFO [RMI TCP Connection(2)-127.0.0.1] org.apache.catalina.core.ApplicationContext.log Initializing Spring root WebApplicationContext
20-Mar-2017 15:33:18.281 SEVERE [RMI TCP Connection(2)-127.0.0.1] org.apache.catalina.core.StandardContext.listenerStart 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 'redisUserDAO' defined in file [/home/ob/Projects/im-system/im-server/build/libs/exploded/im-service-1.0.0.war/WEB-INF/classes/com/xxx/im/dao/redis/RedisUserDAO.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.xxx.im.dao.redis.RedisUserDAO]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1116)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1060)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
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:759)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4717)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5179)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1702)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:456)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:405)

...

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.xxx.im.dao.redis.RedisUserDAO]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:154)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1108)
... 58 more
Caused by: java.lang.NullPointerException
at com.xxx.im.dao.redis.RedisBaseDAO.getKeySerializer(RedisBaseDAO.java:28)
at com.xxx.im.dao.redis.RedisUserDAO.(RedisUserDAO.java:20)
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:423)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:142)

... 60 more

spring配置:

  1. spring-config.xml
 <?xml version="1.0" encoding="UTF-8"?>
<!-- applicationContext -->
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="
           http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context.xsd
           http://www.springframework.org/schema/aop
           http://www.springframework.org/schema/aop/spring-aop.xsd">

    <aop:aspectj-autoproxy/>

    <!-- 配置文件注入 -->
    <context:property-placeholder location="classpath:config.properties"/>

    <context:component-scan base-package="com.xxx.im"/>

    <bean class="com.xxx.im.util.SpringUtils"/>
    <import resource="classpath:spring-config-*.xml"/>
</beans>
  1. spring-config-redis
 <?xml version="1.0" encoding="utf-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxTotal" value="${jedis.maxTotal}"/>
        <property name="maxIdle" value="${jedis.maxIdle}"/>
        <property name="minIdle" value="${jedis.minIdle}"/>
        <property name="maxWaitMillis" value="${jedis.maxWaitMillis}"/>
        <property name="minEvictableIdleTimeMillis" value="${jedis.minEvictableIdleTimeMillis}"/>
        <property name="numTestsPerEvictionRun" value="${jedis.numTestsPerEvictionRun}"/>
        <property name="timeBetweenEvictionRunsMillis" value="${jedis.timeBetweenEvictionRunsMillis}"/>
        <property name="testOnBorrow" value="${jedis.testOnBorrow}"/>
        <property name="testOnReturn" value="${jedis.testOnReturn}"/>
        <property name="testWhileIdle" value="${jedis.testWhileIdle}"/>
    </bean>

    <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" destroy-method="destroy">
        <property name="hostName" value="${redis.hostname}"/>
        <property name="port" value="${redis.port}"/>
        <property name="timeout" value="${redis.timeout}"/>
        <property name="database" value="${redis.database}"/>
        <property name="password" value="${redis.password}"/>
        <property name="usePool" value="${redis.userPool}"/>
        <property name="poolConfig" ref="jedisPoolConfig"/>
    </bean>

    <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate" p:connection-factory-ref="connectionFactory"/>
    <bean id="stringRedisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate" p:connection-factory-ref="connectionFactory"/>
</beans>
  1. 调用出错代码
 package com.mzj.im.dao.redis;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.ListOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;

import javax.annotation.Resource;

/**
 * Created by xx on 17-3-17.
 */
public abstract class RedisBaseDAO <K, V> {

    @Autowired
    protected RedisTemplate<K, V> redisTemplate;

    public void setRedisTemplate(RedisTemplate<K, V> redisTemplate) {
        this.redisTemplate = redisTemplate;
    }

    protected RedisSerializer<K> getKeySerializer(){
        return (RedisSerializer<K>) redisTemplate.getKeySerializer();
    }

    protected RedisSerializer<V> getValueSerializer(){
        return (RedisSerializer<V>) redisTemplate.getValueSerializer();
    }
}

  1. 断点调试 图片说明
  • 写回答

2条回答

  • wucan_dan 2017-08-04 09:51
    关注

    用@Resource

    评论

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