运行通过 PowerMockRunner class 连接到自定义数据库驱动程序时出错

Question

当我尝试连接到数据库时，我的 junit class 出现以下错误，我正在为我的 junit 使用 PowerMockRunner。我尝试连接的驱动程序不是众所周知的或开源的，它是我公司制作的自定义驱动程序。是引起问题的那个吗？痕迹是：

 WARNING: Error while registering Oracle JDBC Diagnosability MBean.
java.lang.LinkageError: loading constraint violation: loader "org/powermock/core/classloader/javassist/JavassistMockClassLoader@591550a" previously initiated loading for a different type with name "javax/management/MBeanServer" defined by loader "com/ibm/oti/vm/BootstrapClassLoader@7ecd7c73"
    at java.lang.ClassLoader.defineClassImpl(Native Method)
    at java.lang.ClassLoader.defineClassInternal(ClassLoader.java:397)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:358)
    at org.powermock.core.classloader.javassist.JavassistMockClassLoader.loadUnmockedClass(JavassistMockClassLoader.java:90)
    at org.powermock.core.classloader.MockClassLoader.loadClassByThisClassLoader(MockClassLoader.java:104)
    at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:147)
    at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:98)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:880)
    at oracle.jdbc.driver.OracleDriver.registerMBeans(OracleDriver.java:409)
    at oracle.jdbc.driver.OracleDriver.run(OracleDriver.java:241)
    at java.security.AccessController.doPrivileged(AccessController.java:678)
    at oracle.jdbc.driver.OracleDriver.<clinit>(OracleDriver.java:237)
    at java.lang.Class.forNameImpl(Native Method)

Answer 1

你的测试中有 @PrepareForTest 注释吗？

如果是，那么当您连接时，它会引用存根 class 并抛出预期。

添加@PowerMockIgnore注释以忽略

@RunWith (PowerMockRunner.class)
...
@PowerMockIgnore({"java.sql.*", "javax.management.*", "org.apache.http.conn.ssl.*", "com.amazonaws.*", "javax.net.ssl.*","com.sun.*"})
public class ... {}

Answer 2

尝试在 class 声明

上方添加以下注释和其他注释

@PowerMockIgnore({"javax.management.*"})

运行通过 PowerMockRunner class 连接到自定义数据库驱动程序时出错

Getting error while connecting to custom db driver when running through PowerMockRunner class

java

powermockito

运行 通过 PowerMockRunner class 连接到自定义数据库驱动程序时出错

Getting error while connecting to custom db driver when running through PowerMockRunner class

java

powermockito

运行通过 PowerMockRunner class 连接到自定义数据库驱动程序时出错