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来自专栏每天学Java
类加载器之URLClassLoader
今天这篇文章我们重点要说的就是URLClassLoader，在上面类加载器的真实继承关系图中，我们知道URLClassLoader扩展了ClassLoader，所以它在ClassLoader的基础上扩展了一些功能 ()是不够的，这个时候就是需要使用URLClassLoader的时候。在我的个人项目中，对于URLClassLoader是有实际使用过的，这里以我的项目作为案例，来看一下URLClassLoader的使用。那么这个应用和URLClassLoader有什么关系呢？ URLClassLoader对类进行加载，最终启动它。
6.3K20发布于 2020-08-05
来自专栏Java日常
Java动态编译优化——URLClassLoader 内存泄漏问题解决
确实能实现动态编译并加载，但是却存在严重的URLClassLoader内存泄漏的问题，并且存在SharedNameTable 和 ZipFileIndex的内存泄漏问题。发现动态编译这块存在URLClassLoader的内存泄漏，如下图所示： ? ? 2、也可以使用源代码的文件级动态编译，去获取文件对应的URLClassLoader。 3、既然不能关闭全局的ClassLoader，又想用URLClassLoader，看了官网URLClassLoader的API后，想到其实可以自己new 一个URLClassLoader来处理动态编译后的至此：URLClassLoader问题解决，JVM的 OLD区正常，项目能正常运行一周左右（之前是2-4小时就内存泄漏挂掉了）补充说明： 1、我这里使用URLClassLoader是new的一个空文件流
3K10发布于 2020-12-24
来自专栏InvQ的专栏
spring boot 启动报错Log4j2 could not find a logging implementation 解决
(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader $1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at (URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader $1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at (URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader
12.4K10发布于 2020-09-27
来自专栏InvQ的专栏
spring boot 启动 NoClassDefFoundError: org/springframework/core/ErrorCoded 报错
(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader $1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at (URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader $1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at (URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader
2.3K20发布于 2020-09-27
来自专栏一个会写诗的程序员的博客
ClassMetadataReadingVisitor has interface org.springframework.asm.ClassVisitor as super class
(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader $1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged (Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at com.taobao.pandora.boot.loader.ReLaunchURLClassLoader.doLoadClass (URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader $1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged
44550发布于 2018-08-17
来自专栏全栈程序员必看
org/w3c/dom/ElementTraversal 错误解决办法
(URLClassLoader.java:455) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader $1.run(URLClassLoader.java:367) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.security.AccessController.doPrivileged (URLClassLoader.java:455) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader $1.run(URLClassLoader.java:367) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.security.AccessController.doPrivileged (URLClassLoader.java:455) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader
1.9K20编辑于 2022-11-17
来自专栏韩曙亮的移动开发专栏
【错误记录】jar 执行错误 ( java.lang.UnsupportedClassVersionError: Unsupported major.minor version 52.0 )
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass (URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged (Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass
69430编辑于 2023-03-29
来自专栏丑胖侠
Drools7.0.0.Final Unsupported major.minor version 52.0异常
800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass (URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader $1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java
74790发布于 2018-01-08
来自专栏IT笔记
JAR版本升级你所遇到的坑！！！
(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader $1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java $1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java
1.9K60发布于 2018-04-13
来自专栏何白白开发记录
动态加载class，卸载class
toURI().toURL(); ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader(); URLClassLoader classLoader = new URLClassLoader( new URL[]{url}, systemClassLoader sqlUtils.newInstance(); System.out.println(instance.getClass()); //卸载类 Method close = URLClassLoader.class.getDeclaredMethod URL url = new File("/home/hjx/Desktop/entityMaker/entityMaker.jar").toURI().toURL(); URLClassLoader classLoader = (URLClassLoader)ClassLoader.getSystemClassLoader(); Method addURL = URLClassLoader.class.getDeclaredMethod
3.5K20发布于 2019-06-28
来自专栏Biubiu说
记录Android Killer反编译时遇到的异常
800) > at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) > at java.net.URLClassLoader.defineClass (URLClassLoader.java:449) > at java.net.URLClassLoader.access$100(URLClassLoader.java:71) > at java.net.URLClassLoader $1.run(URLClassLoader.java:361) > at java.net.URLClassLoader$1.run(URLClassLoader.java:355) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java
3.2K20发布于 2019-06-11
来自专栏全栈程序员必看
Exception in thread “main” java.lang.UnsupportedClassVersionError: com/css/test/JDBindServiceImpl :
800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass (URLClassLoader.java:449) at java.net.URLClassLoader.access100(URLClassLoader.java:71) at java.net.URLClassLoader1 .run(URLClassLoader.java:361) at java.net.URLClassLoader1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged (Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass
77520编辑于 2022-07-01
来自专栏全栈程序员必看
java对象转map_java中实现map与对象相互转换的几种实现
(URLClassLoader.java:260) at java.net.URLClassLoader.access$000(URLClassLoader.java:56) at java.net.URLClassLoader $1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass (URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher $1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass $1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass
3.4K20编辑于 2022-08-18
来自专栏stream process
flink 问题记录
(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader $1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged (URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader (URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader (URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader
91520发布于 2020-03-04
来自专栏xingoo, 一个梦想做发明家的程序员
java.lang.NoClassDefFoundError: org/aopalliance/aop/Advice
(Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader (Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass (Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader (Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass (Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader
1.4K50发布于 2018-01-17
来自专栏Java技术栈
3种常见的Class级别的错误
java.lang.ClassNotFoundException: com.User at java.net.URLClassLoader.findClass(URLClassLoader.java (URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader $1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java (URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher
3.2K110发布于 2018-03-30
来自专栏让技术和时代并行
Unsupported major.minor version 51.0
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass (URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged (Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass
66930发布于 2019-04-16
来自专栏Java技术栈
接了个变态需求：给定一个接口，要用户自定义动态实现并上传热部署，怎么搞？
urlClassLoader = new URLClassLoader(new URL[]{new URL(jarPath)}, Thread.currentThread().getContextClassLoader ()); Class clazz = urlClassLoader.loadClass("com.nci.cetc15.calculator.impl.CalculatorImpl"); urlClassLoader = new URLClassLoader(new URL[]{new URL(jarPath)}, Thread.currentThread().getContextClassLoader ()); for (String className : classNameSet) { Class clazz = urlClassLoader.loadClass(className urlClassLoader = new URLClassLoader(new URL[]{new URL(jarPath)}, Thread.currentThread().getContextClassLoader
52230编辑于 2023-02-27
来自专栏一英里广度一英寸深度的学习
Btrace学习笔记
(URLClassLoader.java:468) java.net.URLClassLoader.access$100(URLClassLoader.java:74) java.net.URLClassLoader $1.run(URLClassLoader.java:369) java.net.URLClassLoader$1.run(URLClassLoader.java:363) java.security.AccessController.doPrivileged (URLClassLoader.java:468) java.net.URLClassLoader.access$100(URLClassLoader.java:74) java.net.URLClassLoader $1.run(URLClassLoader.java:369) java.net.URLClassLoader$1.run(URLClassLoader.java:363) java.security.AccessController.doPrivileged (URLClassLoader.java:468) java.net.URLClassLoader.access$100(URLClassLoader.java:74) java.net.URLClassLoader
95130发布于 2018-12-27
来自专栏JavaEdge
JUnit单元测试报错NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory
by: java.lang.ClassNotFoundException: org.junit.platform.launcher.core.LauncherFactory at java.net.URLClassLoader $1.run(URLClassLoader.java:372) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.security.AccessController.doPrivileged (Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:360) at java.lang.ClassLoader.loadClass
96920编辑于 2022-11-30

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类加载器之URLClassLoader

Java动态编译优化——URLClassLoader 内存泄漏问题解决

spring boot 启动报错Log4j2 could not find a logging implementation 解决

spring boot 启动 NoClassDefFoundError: org/springframework/core/ErrorCoded 报错

ClassMetadataReadingVisitor has interface org.springframework.asm.ClassVisitor as super class

org/w3c/dom/ElementTraversal 错误解决办法

【错误记录】jar 执行错误 ( java.lang.UnsupportedClassVersionError: Unsupported major.minor version 52.0 )

Drools7.0.0.Final Unsupported major.minor version 52.0异常

JAR版本升级你所遇到的坑！！！

动态加载class，卸载class

记录Android Killer反编译时遇到的异常

Exception in thread “main” java.lang.UnsupportedClassVersionError: com/css/test/JDBindServiceImpl :

java对象转map_java中实现map与对象相互转换的几种实现

flink 问题记录

java.lang.NoClassDefFoundError: org/aopalliance/aop/Advice

3种常见的Class级别的错误

Unsupported major.minor version 51.0

接了个变态需求：给定一个接口，要用户自定义动态实现并上传热部署，怎么搞？

Btrace学习笔记

JUnit单元测试报错NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory

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