Java log4j:ERROR “org.apache.log4j.ConsoleAppender”对象不可分配给“org.apache.log4j.Appender”变量
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log4j:ERROR A "org.apache.log4j.ConsoleAppender" object is not assignable to a "org.apache.log4j.Appender" variable
提问by Kasun Kariyawasam
I am making a web app using gradle. I used log4j in this app. When I build the project I am getting error...
我正在使用 gradle 制作一个网络应用程序。我在这个应用程序中使用了 log4j。当我构建项目时，我收到错误...
- log4j:ERROR A "org.apache.log4j.ConsoleAppender" object is not assignable to a "org.apache.log4j.Appender" variable.
- log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
- log4j:ERROR [org.powermock.core.classloader.MockClassLoader@16a40b2] whereas object of type
- log4j:ERROR "org.apache.log4j.ConsoleAppender" was loaded by [sun.misc.Launcher$AppClassLoader@5e3a78ad].
- log4j:ERROR Could not instantiate appender named "stdout".
- log4j:ERROR “org.apache.log4j.ConsoleAppender”对象不可分配给“org.apache.log4j.Appender”变量。
- log4j:ERROR 类“org.apache.log4j.Appender”被加载
- log4j:ERROR [org.powermock.core.classloader.MockClassLoader@16a40b2] 而对象类型
- log4j：错误“org.apache.log4j.ConsoleAppender”由 [sun.misc.Launcher$AppClassLoader@5e3a78ad] 加载。
- log4j:ERROR 无法实例化名为“stdout”的 appender。
I still did not find a good answer. And I forgot to say, My project build correctly and show log massages correctly. It doesn't work only on test classes.
我仍然没有找到一个好的答案。我忘了说，我的项目正确构建并正确显示日志信息。它不仅适用于测试类。
采纳答案by ToYonos
Adding this annotation works for me.
添加此注释对我有用。
@PowerMockIgnore("org.apache.log4j.*")
回答by artplastika
Your classpath contains 2 copies of log4j library. Exclude one and try again.
您的类路径包含 2 个 log4j 库副本。排除一个，然后重试。
回答by Kasun Kariyawasam
There is a Clear answer here. :D
有一个明确的答案在这里。:D
When we have a final method and slf4j loggers in our classes. We have to use powermock in our test class. Because of this we have to use @MockPolicy(Slf4jMockPolicy.class) with particuler imports at the test class which we used Powermock.
当我们的类中有 final 方法和 slf4j 记录器时。我们必须在我们的测试类中使用 powermock。因此，我们必须在我们使用 Powermock 的测试类中使用 @MockPolicy(Slf4jMockPolicy.class) 和特定的导入。
