blocks|key|1290592|text|(重写2015-07-28)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1290593|在编译有错误的代码时，Eclipse的默认行为是生成字节码，抛出您所看到的异常，从而允许程序运行。这是可能的，因为Eclipse使用自己的内置编译器，而不是Apache+Maven使用的JDK中的javac，并且由于错误而使编译完全失败。如果您在使用命令行mvn命令的Maven项目上使用Eclipse，则可能会发生这种情况。|offset|length|style|CODE|1290594|解决方法是在再次运行之前修复错误并重新编译。|1290595|在此屏幕转储中，该设置用红色方框标记：|1290596|​|1290597|📷|atomic|1290598|1290599|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/6cbacb4d9b83cc541df60e34e0d817e6.png|imageAlt^0|0|2Q|5|3K|3|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@$D|12|E|13|F|G]|$D|14|E|15|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|16|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|17|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|18|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|19|8|@]|9|@$D|1A|E|1B|1|1C]]|A|$]]|$1|Q|3|M|5|6|7|1D|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|S|$T|$5|U|V|W|A|$X|Y|Z|-4]]]]

(rewritten 2015-07-28)
The default behavior of Eclipse when compiling code with errors in it, is to generate byte code throwing the exception you see, allowing the program to be run. This is possible as Eclipse uses its own built-in compiler, instead of <code>javac</code> from the JDK which Apache Maven uses, and which fails the compilation completely for errors. If you use Eclipse on a Maven project which you are also working with using the command line <code>mvn</code> command, this may happen.
The cure is to fix the errors and recompile, before running again.
The setting is marked with a red box in this screendump:
<a href="https://i.stack.imgur.com/7yWav.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7yWav.png" alt="Eclipse Preferences under OS X" /></a>

blocks|key|1505280|text|您编译的类可能需要使用新的jars从源代码重新编译。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1505281|尝试运行"mvn+clean“，然后重建|1505282|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Your compiled classes may need to be recompiled from the source with the new jars.

Try running "mvn clean" and then rebuild

blocks|key|1290718|text|尝试清理eclipse项目。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1290719|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

blocks|key|1505381|text|您只需尝试通过命令来清理maven|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1505382|mvn+clean|code-block|syntax|javascript|1505383|在下面的命令之后|1505384|mvn+eclipse:clean+eclipse:eclipse|1505385|然后重建你的项目...|1505386|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

you just try to clean maven by command

<pre><code>mvn clean
</code></pre>

and after that following command 

<pre><code>mvn eclipse:clean eclipse:eclipse
</code></pre>

and rebuild your project....

blocks|key|1290824|text|当我使用具有无效类路径的启动配置时，我遇到了这个错误。在我的例子中，我有一个最初使用Maven的项目，因此启动配置中有一个Maven类路径元素。我后来将项目更改为使用Gradle，并从项目的类路径中删除了Maven类路径，但启动配置仍然使用它。我在尝试运行它时遇到了这个错误。清理和重新生成项目未解决此错误。相反，编辑启动配置，删除项目类路径元素，然后将项目添加回类路径中的用户条目。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1290825|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had this error when I used a launch configuration that had an invalid classpath. In my case, I had a project that initially used Maven and thus a launch configuration had a Maven classpath element in it. I had later changed the project to use Gradle and removed the Maven classpath from the project's classpath, but the launch configuration still used it. I got this error trying to run it. Cleaning and rebuilding the project did not resolve this error. Instead, edit the launch configuration, remove the project classpath element, then add the project back to the User Entries in the classpath.

blocks|key|1505465|text|我多次遇到这个错误，并努力解决。最后，我删除了运行配置并重新添加了默认条目。它工作得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1505466|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I got this error multiple times and struggled to work out. Finally, I removed the run configuration and re-added the default entries. It worked beautifully.

blocks|key|1290891|text|确保已从生成路径中删除了不可用的库(jar文件|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1290892|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Make sure you have removed unavailable libraries (jar files) from build path

blocks|key|1505540|text|作为一个奇怪的例子，我遇到了这样一个异常，异常消息(未解析的编译bla)被硬编码在生成的类本身中。反编译类揭示了这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1505541|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

As a weird case, I encountered such an exception where the exception message (unresolved compilation bla bla) was hardcoded inside of generated class' itself. Decompiling the class revealed this.

blocks|key|1505573|text|我在使用visual+studio代码时也遇到了同样的问题。根本原因是备份的java文件留在同一目录中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1505574|当构建失败时删除备份的java文件，选择修复它，它清理缓存并重新启动workSpace。|1505575|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I had the same issue using the visual studio Code. The root cause was backup java file was left in the same directory.
Removed the backup java file
When the build failed, selected the Fix it, it cleaned up the cache and restarted the workSpace.

What are the possible causes of a "java.lang.Error: Unresolved compilation problem"?

Additional information: 

I have seen this after copying a set of updated JAR files from a build on top of the existing JARs and restarting the application. The JARs are built using a Maven build process.

I would expect to see LinkageErrors or ClassNotFound errors if interfaces changed. The above error hints at some lower level problem.

A clean rebuild and redeployment fixed the problem. Could this error indicate a corrupted JAR?

Java: Unresolved compilation problem

编译器

Eclipse

"java.lang.Error:未解决的编译问题“的可能原因是什么？其他信息：在从现有JAR之上的构建中复制一组更新的JAR文件并重新启动应用程序后，我就看到了这一点。JAR是使用Maven构建过程构建的。如果接口发生更改，我预计会看到LinkageErrors或ClassNotFound错误。上面的错误提示了一些较...

问Java:未解决的编译问题
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