通过 PowerMockRunner class 运行时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。 是导致问题的那个吗？ 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$1.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，它指的是存根 class 并引发预期。

添加@PowerMockIgnore注解忽略

@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以及其他注释

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