Spring啓動報錯：java.lang.ClassNotFoundException: org.springframework.expression.ParserContext

1.記錄一次啓動報錯：

Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/expression/ParserContext
	at org.springframework.context.support.AbstractApplicationContext.prepareBeanFactory(AbstractApplicationContext.java:629)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:517)
	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
	at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
	at com.gaosi.squirrel.start.Main.start(Main.java:69)
	at com.gaosi.squirrel.start.Main.main(Main.java:48)
Caused by: java.lang.ClassNotFoundException: org.springframework.expression.ParserContext
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 6 more

解決辦法：

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-expression</artifactId>
    <version>【和你所用的Spring版本匹配】</version>
</dependency>

我是在用spring-data-mongodb時exclusion掉了spring-expression：

最後，把exclusion掉的spring-expression註釋起來，就OK了，同時maven依賴裏也有了spring-expression包，最後啓動就OK了。