ClassNotFoundException javax.media.jai.OperationRegistrySpi，但是该类在那里 [英] ClassNotFoundException javax.media.jai.OperationRegistrySpi but the class is there

问题描述

我有两个与Jai一起工作的类似项目，一个在从jai_core.jar库中调用RenderedOp类时平稳运行，而另一个则停止，并说找不到类OperationRegistrySpi.

I have two similar projects working with Jai and one runs smoothly while the other stops when calling RenderedOp class from the jai_core.jar library, saying that it can't find the class OperationRegistrySpi.

两个类.

RenderedOp imagen = JAI.create("stream",imgTif ); //This line throws the exception

日志如下:

GRAVE: >>java.lang.NoClassDefFoundError: javax/media/jai/OperationRegistrySpi
>>java.lang.ClassNotFoundException: javax.media.jai.OperationRegistrySpi
>>  at java.net.URLClassLoader$1.run(Unknown Source)
>>  at java.security.AccessController.doPrivileged(Native Method)
>>  at java.net.URLClassLoader.findClass(Unknown Source)
>>  at sun.misc.Launcher$ExtClassLoader.findClass(Unknown Source)
>>  at java.lang.ClassLoader.loadClass(Unknown Source)
>>  at java.lang.ClassLoader.loadClass(Unknown Source)
>>  at java.lang.ClassLoader.defineClass1(Native Method)
>>  at java.lang.ClassLoader.defineClassCond(Unknown Source)
>>  at java.lang.ClassLoader.defineClass(Unknown Source)
>>  at java.security.SecureClassLoader.defineClass(Unknown Source)
>>  at java.net.URLClassLoader.defineClass(Unknown Source)
>>  at java.net.URLClassLoader.access$000(Unknown Source)
>>  at java.net.URLClassLoader$1.run(Unknown Source)
>>  at java.security.AccessController.doPrivileged(Native Method)
>>  at java.net.URLClassLoader.findClass(Unknown Source)
>>  at sun.misc.Launcher$ExtClassLoader.findClass(Unknown Source)
>>  at java.lang.ClassLoader.loadClass(Unknown Source)
>>  at java.lang.ClassLoader.loadClass(Unknown Source)
>>  at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
>>  at java.lang.ClassLoader.loadClass(Unknown Source)
>>  at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1595)
>>  at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
>>  at java.lang.Class.forName0(Native Method)
>>  at java.lang.Class.forName(Unknown Source)
>>  at com.sun.media.jai.util.Service$LazyIterator.next(Service.java:267)
>>  at javax.media.jai.OperationRegistry.registerServices(OperationRegistry.java:2047)
>>  at javax.media.jai.ThreadSafeOperationRegistry.registerServices(ThreadSafeOperationRegistry.java:612)
>>  at javax.media.jai.OperationRegistry.initializeRegistry(OperationRegistry.java:365)
>>  at javax.media.jai.JAI.<clinit>(JAI.java:560)

我已经配置了构建路径，并且工作项目和越野车的jar文件位置相同.

I have configured the Build Path and the jar file location is the same for the working project and the buggy one.

我正在使用Eclipse.

I'm on Eclipse.

推荐答案

我可以通过删除与Jai相关的所有jar文件(jai-core和jai-codec)并重新安装jai-1_1_2_01-lib-windows-来解决此问题.找到了i586-jre.exe软件包

I could solve it by deleting all the jar files related to Jai (jai-core and jai-codec) and reinstalling the jai-1_1_2_01-lib-windows-i586-jre.exe package found here.

问题是我缺少Jai安装随附的mlibwrapper_jai.jar.

The problem was that I was missing the mlibwrapper_jai.jar that comes with the installation of jai.

这篇关于ClassNotFoundException javax.media.jai.OperationRegistrySpi，但是该类在那里的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！