添加 jai 作为 Wildfly 模块

Question

我有一个java bean项目，需要用到jai，所以我添加了一个maven依赖

<dependency>
    <groupId>com.github.jai-imageio</groupId>
    <artifactId>jai-imageio-core</artifactId>
    <version>1.3.1</version>   
</dependency>

我尝试像wildfly 9一样添加新模块

模块.xml

<?xml version="1.0" encoding="UTF-8"?>

<module xmlns="urn:jboss:module:1.3" name="com.github.jaiimageio">
    <resources>
        <resource-root path="jai-imageio-core-1.3.1.jar"/>
    </resources>
</module>

然后我添加一个来自mvnrepo 的罐子 并将jar+module.xml放入

wildfly-9.0.2.Final\modules\system\layers\base\com\github\jaiimageio\main

然后在我的Java项目中

jboss-deployment-structure.xml

<jboss-deployment-structure>
    <deployment>
        <dependencies>
            <module name="org.jboss.ejb3"/>
            <module name="org.jboss.ws.api"/>
            <module name="org.apache.cxf"/>
            <module name="org.jboss.ws.cxf.jbossws-cxf-server"/>
            <module name="com.github.jaiimageio"/>
        </dependencies>
    </deployment>
</jboss-deployment-structure>

但是当我尝试调用我的 java bean 时，我遇到了一个异常

Caused by: java.util.NoSuchElementException
    at javax.imageio.spi.FilterIterator.next(ServiceRegistry.java:836)
    at javax.imageio.ImageIO$ImageWriterIterator.next(ImageIO.java:842)
    at javax.imageio.ImageIO$ImageWriterIterator.next(ImageIO.java:827)
    at ru.shop.createFile.CreateFileBean.write_tiff(CreateFileBean.java:541)
    at ru.shop.createFile.CreateFileBean.testAdd(CreateFileBean.java:77)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437)
    at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82)
    at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93)
    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437)
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:73)
    at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
    at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:52)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ejb3.component.interceptors.NonPooledEJBComponentInstanceAssociatingInterceptor.processInvocation(NonPooledEJBComponentInstanceAssociatingInterceptor.java:59)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
    at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:275)
    ... 79 more

我的代码：

private void write_tiff() throws IOException
    {   
        RenderedImage image=javax.imageio.ImageIO.read(new File("C:\\users\\user\\Desktop\\examples\\srts.jpg"));   
        RenderedImage image1=javax.imageio.ImageIO.read(new File("C:\\users\\user\\Desktop\\examples\\passport.jpg"));

        Iterator<ImageWriter> iterator=ImageIO.getImageWritersByFormatName("TIFF");
        System.out.println(iterator.hasNext());

        ImageWriter writer=iterator.next();
    }

ImageIO.getImageWritersByFormatName("TIFF") 返回 null。

但是如果我从 java 应用程序中调用这个方法，而不是在 java bean 中，一切正常。

我尝试将 modulename 转换为 com.github.jai-imageio ，但没有任何转换。

谁能帮帮我？

Answer 1

我可以在不向jvm的ext添加jar的情况下解决这个问题

代码：

ImageIO.scanForPlugins();
ByteArrayOutputStream output_stream=new ByteArrayOutputStream();            
try 
{
    ImageOutputStream output = ImageIO.createImageOutputStream(output_stream);
    ImageWriter writer = new TIFFImageWriterSpi().createWriterInstance();
    writer.setOutput(output);
    writer.prepareWriteSequence(null);
    writeToSequence(new IIOImage(ImageIO.read(new ByteArrayInputStream(bytes)),null,null),null);
    writer.endWriteSequence();
    writer.dispose();           
    output.flush();
    output.close(); 

pom 依赖：

<dependency>
    <groupId>com.sun.media</groupId>
    <artifactId>jai_imageio</artifactId>
    <version>1.2-pre-dr-b04</version>
</dependency>

module.xml (wildfly\modules\system\layers\base\com\sun\media\imageio\main)

<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.1" name="com.sun.media.imageio">
    <resources>
        <resource-root path="jai_imageio-1.2-pre-dr-b04.jar"/>
        <resource-root path="clibwrapper_jiio-1.2-pre-dr-b04.jar"/>
    </resources>

    <dependencies>
        <module name="javax.api"/>
    </dependencies>
</module>