本來是準(zhǔn)備修改下redis的配置，增加了幾個參數(shù)設(shè)置谓形，結(jié)果在pom.xml之中增加了兩行配置灶伊，然后spring啟動就會報錯。
pom.xml修改如下：
<redis.testOnReturn>true</redis.testOnReturn>
<redis.maxTotal>100</redis.maxTotal>
spring配置如下：
<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxIdle" value="${redis.maxIdle}"/>
<property name="maxTotal" value="${redis.maxTotal}"/>
<property name="maxWaitMillis" value="${redis.maxWaitMillis}"/>
<property name="testOnBorrow" value="${redis.testOnBorrow}"/>
<property name="testOnReturn" value="${redis.testOnReturn}"/>
</bean>
接下來啟動就報錯了:
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jedisSentinelPool' defined in ServletContext resource [/WEB-INF/conf/spring/applicationContext.xml]: Cannot resolve reference to bean 'poolConfig' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'poolConfig' defined in ServletContext resource [/WEB-INF/conf/spring/applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'maxTotal'; nested exception is java.lang.NumberFormatException: For input string: "${redis.maxTotal}"
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:336)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108)
at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:632)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:140)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1114)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1017)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1017)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:960)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
... 86 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'poolConfig' defined in ServletContext resource [/WEB-INF/conf/spring/applicationContext.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 'maxTotal'; nested exception is java.lang.NumberFormatException: For input string: "${redis.maxTotal}"
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:547)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
... 101 more
Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'maxTotal'; nested exception is java.lang.NumberFormatException: For input string: "${redis.maxTotal}"
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:479)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:511)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:505)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1502)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1461)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
... 107 more
Caused by: java.lang.NumberFormatException: For input string: "${redis.maxTotal}"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:569)
at java.lang.Integer.valueOf(Integer.java:766)
at org.springframework.util.NumberUtils.parseNumber(NumberUtils.java:171)
at org.springframework.beans.propertyeditors.CustomNumberEditor.setAsText(CustomNumberEditor.java:113)
at org.springframework.beans.TypeConverterDelegate.doConvertTextValue(TypeConverterDelegate.java:430)
at org.springframework.beans.TypeConverterDelegate.doConvertValue(TypeConverterDelegate.java:403)
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:181)
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:459)
... 113 more
由于其他的參數(shù)配置是沒有問題的寒跳，只有我新增加的兩個參數(shù)是有問題的聘萨，中間嘗試了下刪掉pom.xml的定義，然后發(fā)現(xiàn)報錯沒有變童太！
所以問題很明顯米辐，報錯其實說是轉(zhuǎn)換問題胸完，其實根本原因是沒有讀進(jìn)去。報轉(zhuǎn)換異常原因可能是沒有定義翘贮，從而默認(rèn)是""赊窥，從而導(dǎo)致了轉(zhuǎn)換異常。
問題發(fā)現(xiàn)了狸页，但是還沒有發(fā)現(xiàn)為什么讀不進(jìn)去锨能，很尷尬。最后仔細(xì)搜其他的配置芍耘，終于發(fā)現(xiàn)了址遇，其實spring讀pom.xml里面定義的參數(shù)，還有一個中間的文件進(jìn)行聲明斋竞。
spring之中還有一個定義：
<context:property-placeholder location="classpath:conf.properties" ignore-unresolvable="true"/>
這里指向了conf.properties這個屬性文件 倔约，里面內(nèi)容為:
#redis
redis.host=${redis.host}
redis.port=${redis.port}
redis.database=${redis.database}
redis.maxIdle=${redis.maxIdle}
redis.maxWaitMillis=${redis.maxWaitMillis}
最后在conf.properties之中加上了我定義的兩個參數(shù)，問題解決坝初。
百度了下跺株，發(fā)現(xiàn)spring讀取pom.xml文件確實要有中間的文件，歸根結(jié)底還是自己不清楚原理脖卖，后續(xù)會再琢磨下，這里先記錄一下~
