使用版本：

SpringBoot：2.1.18.RELEASESpringCloud: Greenwich.SR6SpringCloud Alibaba: 2.1.2.RELEASEjasypt-spring-boot-starter：2.1.2

问题说明：

通过jasypt对Nacos中的敏感配置项进行加密处理后，当更新nacos更新配置项时，后台会报错：

java.lang.IllegalArgumentException: Could not resolve placeholder 'project.version' in value "${project.version}"at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:178)at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124)at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:239)at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210)at org.springframework.core.env.AbstractEnvironment.resolveRequiredPlaceholders(AbstractEnvironment.java:575)at java.util.Optional.map(Optional.java:215)at com.ulisesbocchio.jasyptspringboot.resolver.DefaultPropertyResolver.resolvePropertyValue(DefaultPropertyResolver.java:38)at com.ulisesbocchio.jasyptspringboot.resolver.DefaultLazyPropertyResolver.resolvePropertyValue(DefaultLazyPropertyResolver.java:42)at com.ulisesbocchio.jasyptspringboot.EncryptablePropertySource.getProperty(EncryptablePropertySource.java:20)at com.ulisesbocchio.jasyptspringboot.caching.CachingDelegateEncryptablePropertySource.lambda$getProperty$0(CachingDelegateEncryptablePropertySource.java:34)at org.springframework.cache.concurrent.ConcurrentMapCache.lambda$get$0(ConcurrentMapCache.java:146)at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)at org.springframework.cache.concurrent.ConcurrentMapCache.get(ConcurrentMapCache.java:144)at com.ulisesbocchio.jasyptspringboot.caching.CachingDelegateEncryptablePropertySource.getProperty(CachingDelegateEncryptablePropertySource.java:34)at com.ulisesbocchio.jasyptspringboot.wrapper.EncryptableMapPropertySourceWrapper.getProperty(EncryptableMapPropertySourceWrapper.java:31)at org.springframework.cloud.context.refresh.ContextRefresher.extract(ContextRefresher.java:255)at org.springframework.cloud.context.refresh.ContextRefresher.extract(ContextRefresher.java:231)at org.springframework.cloud.context.refresh.ContextRefresher.refreshEnvironment(ContextRefresher.java:91)at org.springframework.cloud.context.refresh.ContextRefresher.refresh(ContextRefresher.java:85)at org.springframework.cloud.endpoint.event.RefreshEventListener.handle(RefreshEventListener.java:72)at org.springframework.cloud.endpoint.event.RefreshEventListener.onApplicationEvent(RefreshEventListener.java:61)at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403)at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360)at com.alibaba.cloud.nacos.refresh.NacosContextRefresher$1.innerReceive(NacosContextRefresher.java:133)at com.alibaba.nacos.api.config.listener.AbstractSharedListener.receiveConfigInfo(AbstractSharedListener.java:38)at com.alibaba.nacos.client.config.impl.CacheData$1.run(CacheData.java:203)at com.alibaba.nacos.client.config.impl.CacheData.safeNotifyListener(CacheData.java:233)at com.alibaba.nacos.client.config.impl.CacheData.checkListenerMd5(CacheData.java:174)at com.alibaba.nacos.client.config.impl.ClientWorker$LongPollingRunnable.run(ClientWorker.java:552)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)at java.util.concurrent.FutureTask.run(FutureTask.java)at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)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)

原因分析：

Spring Boot 会加载classpath下的application.properties

而 SpringCloud Alibaba: 2.1.2.RELEASE中 nacos-api:1.2.1和nacos-client:1.2.1中

application.properties里面有 version=${project.version} ；

导致jasypt解析时，找不到值报错。

解决方案：

将SpringCloud Alibaba升级到2.1.4.RELEASE可以解决该问题。升级后nacos-api:1.4.1和nacos-client:1.4.1中去掉了application.properties。

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Could not resolve placeholder ‘project.version‘ in value “${project.version}”

使用版本：

问题说明：

原因分析：

解决方案：

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