关于java.lang.NumberFormatException: For input string:${redis.maxIdle}的报错

灰太狼 2022-05-09 04:08 204阅读 0赞

项目通用文件配置目录

![项目通用文件配置目录][70]

reids配置文件

<?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" 
      xmlns:context="http://www.springframework.org/schema/context" 
      xmlns:mvc="http://www.springframework.org/schema/mvc" 
      xmlns:cache="http://www.springframework.org/schema/cache"
      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/mvc   
                http://www.springframework.org/schema/mvc/spring-mvc.xsd 
                http://www.springframework.org/schema/cache  
                http://www.springframework.org/schema/cache/spring-cache.xsd">  
      
       
        
       <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">  
         <property name="maxIdle" value="${redis.maxIdle}" />   
         <property name="maxWaitMillis" value="${redis.maxWait}" />  
         <property name="testOnBorrow" value="${redis.testOnBorrow}" />  
       </bean>  
      
       <bean id="JedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" 
           p:host-name="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:pool-config-ref="poolConfig"/>  
       
       <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">  
        	<property name="connectionFactory" ref="JedisConnectionFactory" />  
       </bean>  
          
    </beans>

报错内容：

严重: 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 'poolConfig' defined in URL [jar:file:/H:/repository_pinyougou/com/pinyougou/pinyougou-common/0.0.1-SNAPSHOT/pinyougou-common-0.0.1-SNAPSHOT.jar!/spring/applicationContext-redis.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.lang.String] to required type [int] for property 'maxIdle'; nested exception is java.lang.NumberFormatException: For input string: "${redis.maxIdle}"
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
    	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$StartChild.call(ContainerBase.java:1549)
    	at java.util.concurrent.FutureTask.run(Unknown Source)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    	at java.lang.Thread.run(Unknown Source)
    Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.lang.String] to required type [int] for property 'maxIdle'; nested exception is java.lang.NumberFormatException: For input string: "${redis.maxIdle}"
    	at org.springframework.beans.AbstractNestablePropertyAccessor.convertIfNecessary(AbstractNestablePropertyAccessor.java:596)
    	at org.springframework.beans.AbstractNestablePropertyAccessor.convertForProperty(AbstractNestablePropertyAccessor.java:603)
    	at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:204)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1527)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1486)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1226)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
    	... 20 more
    Caused by: java.lang.NumberFormatException: For input string: "${redis.maxIdle}"
    	at java.lang.NumberFormatException.forInputString(Unknown Source)
    	at java.lang.Integer.parseInt(Unknown Source)
    	at java.lang.Integer.valueOf(Unknown Source)
    	at org.springframework.util.NumberUtils.parseNumber(NumberUtils.java:194)
    	at org.springframework.beans.propertyeditors.CustomNumberEditor.setAsText(CustomNumberEditor.java:113)
    	at org.springframework.beans.TypeConverterDelegate.doConvertTextValue(TypeConverterDelegate.java:464)
    	at org.springframework.beans.TypeConverterDelegate.doConvertValue(TypeConverterDelegate.java:437)
    	at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:195)
    	at org.springframework.beans.AbstractNestablePropertyAccessor.convertIfNecessary(AbstractNestablePropertyAccessor.java:576)
    	... 26 more

观察报错原因 为 ：

Failed to convert property value of type \[java.lang.String\] to required type \[int\] for property 'maxIdle'; nested exception is java.lang.NumberFormatException: For input string: "$\{redis.maxIdle\}"

未能将java.lang.string类型的文件转换成maxIdle属性需要的int类型 为数据转换类型错误

仔细分析后：

原来是在测试时，没有导入redis.properties文件，value把$\{redis.maxIdle\}解析为字符串，所以会报: For input string: "$\{redis.maxIdle\}"异常。实际在项目部署启动tomcat后就不会报这样的异常，因为不会获取不到配置文件。

更改方法：

在spring配置文件目录下apllicationContext-redis中添加

**<context:property-placeholder location="classpath\*:properties/\*.properties" />**

修改后的application-redis.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" xmlns:p="http://www.springframework.org/schema/p" 
      xmlns:context="http://www.springframework.org/schema/context" 
      xmlns:mvc="http://www.springframework.org/schema/mvc" 
      xmlns:cache="http://www.springframework.org/schema/cache"
      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/mvc   
                http://www.springframework.org/schema/mvc/spring-mvc.xsd 
                http://www.springframework.org/schema/cache  
                http://www.springframework.org/schema/cache/spring-cache.xsd">  
      
       <context:property-placeholder location="classpath*:properties/*.properties" />  
        
       <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">  
         <property name="maxIdle" value="${redis.maxIdle}" />   
         <property name="maxWaitMillis" value="${redis.maxWait}" />  
         <property name="testOnBorrow" value="${redis.testOnBorrow}" />  
       </bean>  
      
       <bean id="JedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" 
           p:host-name="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:pool-config-ref="poolConfig"/>  
       
       <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">  
        	<property name="connectionFactory" ref="JedisConnectionFactory" />  
       </bean>  
          
    </beans>

修改完成后，项目正常运行。

[70]: /images/20220509/6095f53535f348e88f64e73a436a622d.png