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打破双亲委派模型方法 这里提到的比如,SPI 中,SPI 的接口(如 java.sql.Driver)是由 Java 核心库提供的,由BootstrapClassLoader 加载。
在我这里实验jbr-17.0.12/bin/java
,测试结果是PlatformClassLoader
public class ClassLoaderTest {
public static void main(String[] args) throws ClassNotFoundException {
Class<?> clazz = Class.forName("java.sql.Driver");
ClassLoader loader = clazz.getClassLoader();
System.out.println("Loader for java.sql.Driver: " + loader);
// Loader for java.sql.Driver: jdk.internal.loader.ClassLoaders$PlatformClassLoader@30f39991
}
}
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