使用多模块maven项目时使用eclipse的类路径问题

Question

我有一个带有相当多子模块的spring 2项目.

一些模块使用包含jackson-databind的库。我为他们添加了除外条款。在执行mvn dependency:tree | grep jackson-databind时，我没有2.2.2依赖项。使用mvn spring-boot:run可以完美地工作。但是，在eclipse中启动应用程序会导致下面的错误。

我应该在哪里寻找错误的来源？

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APPLICATION FAILED TO START
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Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.registerWellKnownModulesIfAvailable(Jackson2ObjectMapperBuilder.java:777)

The following method did not exist:

    com.fasterxml.jackson.databind.Module.getTypeId()Ljava/lang/Object;

The method's class, com.fasterxml.jackson.databind.Module, is available from the following locations:

    jar:file:/C:/Users/somebody/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.2.2/jackson-databind-2.2.2.jar!/com/fasterxml/jackson/databind/Module.class
    jar:file:/C:/Users/somebody/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.6.6/jackson-databind-2.6.6.jar!/com/fasterxml/jackson/databind/Module.class
    jar:file:/C:/Users/somebody/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar!/com/fasterxml/jackson/databind/Module.class
    jar:file:/C:/Users/somebody/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.8.8/jackson-databind-2.8.8.jar!/com/fasterxml/jackson/databind/Module.class

It was loaded from the following location:

    file:/C:/Users/somebody/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.2.2/jackson-databind-2.2.2.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of com.fasterxml.jackson.databind.Module

Answer 1

嗯嗯。似乎这个项目被错误地导入了eclipse。也许是mvn eclipse:eclipse的错。

• 从工作区中删除项目
• 删除所有eclipse项目文件(.project、.classpath等)
• 把它们放进.gitignore
• 通过import maven project导入项目

现在起作用了。