解析方法“javax/imageio/metadata/IIOMetadata.getAsTree(Ljava/lang/String;)Lorg/w3c/dom/Node时加载约束冲突

iq0todco  于 2024-01-05  发布在  Java
关注(0)|答案(2)|浏览(207)

我正在Websphere ND 9.0.5.13上使用ApahcePdfbox 2.0.30，该应用程序在Java 8上运行类加载器设置为Parent Last
我的POM文件如下：

  1. <dependencies>
  2.     
  3.    <dependency>
  4.         <groupId>org.springframework.boot</groupId>
  5.         <artifactId>spring-boot-starter</artifactId>
  6.         <exclusions>
  7.             <exclusion>
  8.                 <groupId>org.springframework.boot</groupId>
  9.                 <artifactId>spring-boot-starter-logging</artifactId>
  10.             </exclusion>
  11.             <exclusion>
  12.                 <artifactId>logback-classic</artifactId>
  13.                 <groupId>ch.qos.logback</groupId>
  14.             </exclusion>
  15.             <exclusion>
  16.                 <artifactId>log4j-to-slf4j</artifactId>
  17.                 <groupId>org.slf4j</groupId>
  18.             </exclusion>
  19.         </exclusions>
  20.     </dependency>
  21.     
  22.     <dependency>
  23.         <groupId>org.springframework.boot</groupId>
  24.         <artifactId>spring-boot-starter-log4j2</artifactId>
  25.     </dependency>
  26.     
  27.     <dependency>
  28.         <groupId>org.springframework.boot</groupId>
  29.         <artifactId>spring-boot-starter-security</artifactId>
  30.     </dependency>
  31.     <dependency>
  32.         <groupId>org.springframework.boot</groupId>
  33.         <artifactId>spring-boot-starter-web</artifactId>
  34.     </dependency>
  35.     <dependency>
  36.        <groupId>org.springframework.boot</groupId>
  37.        <artifactId>spring-boot-starter-data-jpa</artifactId>
  38.     </dependency>
  39.     
  40.     <dependency>
  41.         <groupId>org.springframework.boot</groupId>
  42.         <artifactId>spring-boot-starter-cache</artifactId>
  43.     </dependency>
  44.     
  46.     
  47.     <dependency>
  48.       <groupId>org.springframework.boot</groupId>
  49.       <artifactId>spring-boot-starter-validation</artifactId>
  50.     </dependency>
  51.     
  52.     <dependency>
  53.         <groupId>xerces</groupId>
  54.         <artifactId>xercesImpl</artifactId>
  55.         <version>2.11.0</version>
  56.     </dependency>
  57.     
  58.     
  59.     
  60.     <dependency>
  61.        <groupId>org.springframework.boot</groupId>
  62.        <artifactId>spring-boot-starter-data-jdbc</artifactId>
  63.     </dependency>
  64.     
  65.     <dependency>
  66.         <groupId>org.springdoc</groupId>
  67.         <artifactId>springdoc-openapi-ui</artifactId>
  68.         <version>${springdoc.version}</version>
  69.     </dependency>
  70.     
  72.     <dependency>
  73.         <groupId>com.microsoft.sqlserver</groupId>
  74.         <artifactId>mssql-jdbc</artifactId>
  75.         <scope>runtime</scope>
  76.     </dependency>
  77.     
  78.     <dependency>
  79.         <groupId>org.springframework.boot</groupId>
  80.         <artifactId>spring-boot-devtools</artifactId>
  81.     </dependency>
  83.     
  84.     <dependency>
  85.         <groupId>com.oracle.jdbc</groupId>
  86.         <artifactId>ojdbc14</artifactId>
  87.         <version>1.4</version>
  88.     </dependency>
  90.     <dependency>
  91.         <groupId>com.google.code.gson</groupId>
  92.         <artifactId>gson</artifactId>
  93.     </dependency>
  94.     
  95.     <dependency>
  96.         <groupId>org.apache.httpcomponents</groupId>
  97.         <artifactId>httpclient</artifactId>
  98.     </dependency>
  99.     
  100.     <dependency>
  101.         <groupId>net.sf.flexjson</groupId>
  102.         <artifactId>flexjson</artifactId>
  103.         <version>3.3</version>
  104.     </dependency>
  105.     
  106.     <dependency>
  107.         <groupId>javax.jws</groupId>
  108.         <artifactId>javax.jws-api</artifactId>
  109.         <version>1.1</version>
  110.     </dependency>
  112.     <dependency>
  113.         <groupId>org.springframework.boot</groupId>
  114.         <artifactId>spring-boot-starter-tomcat</artifactId>
  115.         <scope>provided</scope>
  116.     </dependency>
  117.     <dependency>
  118.         <groupId>org.springframework.boot</groupId>
  119.         <artifactId>spring-boot-starter-test</artifactId>
  120.         <scope>test</scope>
  121.     </dependency>
  122.     
  123.     <dependency>
  124.         <groupId>javax.activation</groupId>
  125.         <artifactId>javax.activation-api</artifactId>
  126.     </dependency>
  128.     
  129.     <dependency>
  130.         <groupId>com.sun.mail</groupId>
  131.         <artifactId>javax.mail</artifactId>
  132.         <version>1.6.2</version>
  133.     </dependency>
  134.     
  135.     
  136.     <dependency>
  137.         <groupId>org.bouncycastle</groupId>
  138.         <artifactId>bcprov-jdk15</artifactId>
  139.         <version>1.46</version>
  140.     </dependency>
  143.     
  144.     <dependency>
  145.         <groupId>commons-io</groupId>
  146.         <artifactId>commons-io</artifactId>
  147.         <version>2.11.0</version>
  148.     </dependency>
  149.     
  150.     <dependency>
  151.         <groupId>com.github.mlaccetti</groupId>
  152.         <artifactId>javapns</artifactId>
  153.         <version>2.3.2</version>
  154.     </dependency>
  155.     
  156.     <dependency>
  157.         <groupId>com.itextpdf</groupId>
  158.         <artifactId>itextpdf</artifactId>
  159.         <version>5.5.6</version>
  160.     </dependency>
  161.     
  162.     <dependency>
  163.         <groupId>org.apache.xmlgraphics</groupId>
  164.         <artifactId>xmlgraphics-commons</artifactId>
  165.         <version>1.5</version>
  166.     </dependency>
  167.     
  168.     <dependency>
  169.         <groupId>org.apache.xmlbeans</groupId>
  170.         <artifactId>xmlbeans</artifactId>
  171.         <version>3.0.1</version>
  172.     </dependency>
  173.     
  174.     <dependency>
  175.         <groupId>org.apache.poi</groupId>
  176.         <artifactId>poi</artifactId>
  177.         <version>4.0.0</version>
  178.     </dependency>
  179.     
  180.     <dependency>
  181.         <groupId>org.apache.poi</groupId>
  182.         <artifactId>poi-ooxml-schemas</artifactId>
  183.         <version>4.0.0</version>
  184.     </dependency>
  185.             
  186.     <dependency>
  187.         <groupId>net.sf.jasperreports</groupId>
  188.         <artifactId>jasperreports</artifactId>
  189.         <version>6.11.0</version>
  190.     </dependency>
  191.     
  192.     <!-- 
  193.     <dependency>
  194.         <groupId>net.sf.jasperreports</groupId>
  195.         <artifactId>jasperreports-fonts</artifactId>
  196.         <version>6.11.0</version>
  197.     </dependency>
  198.     -->
  199.     
  200.     
  201.     <dependency>
  202.         <groupId>jasperreports-fonts</groupId>
  203.         <artifactId>jasperreports-fonts</artifactId>
  204.         <version>0.6.11.0</version>
  205.     </dependency>
  206.     
  208.     <dependency>
  209.         <groupId>com.lowagie</groupId>
  210.         <artifactId>itext</artifactId>
  211.         <version>2.1.7</version>
  212.     </dependency>
  213.     
  214.     <dependency>
  215.         <groupId>net.sf.barcode4j</groupId>
  216.         <artifactId>barcode4j</artifactId>
  217.         <version>2.1</version>
  218.     </dependency>
  219.     
  220.     <dependency>
  221.         <groupId>org.apache.xmlgraphics</groupId>
  222.         <artifactId>batik-all</artifactId>
  223.         <version>1.11</version>
  224.         <type>pom</type>
  225.     </dependency>
  226.     
  227.     <dependency>
  228.         <groupId>com.google.zxing</groupId>
  229.         <artifactId>core</artifactId>
  230.         <version>2.2</version>
  231.     </dependency>
  232.     
  233.     <dependency>
  234.         <groupId>com.google.zxing</groupId>
  235.         <artifactId>javase</artifactId>
  236.         <version>2.2</version>
  237.     </dependency>
  239.     <dependency>
  240.         <groupId>javax.xml</groupId>
  241.         <artifactId>jaxrpc-api</artifactId>
  242.         <version>1.1</version>
  243.     </dependency>
  244.     
  245.     <dependency>
  246.         <groupId>axis</groupId>
  247.         <artifactId>axis</artifactId>
  248.         <version>1.3</version>
  249.     </dependency>
  250.     
  251.     <dependency>
  252.         <groupId>com.ibm.websphere.appserver.api</groupId>
  253.         <artifactId>com.ibm.websphere.appserver.api.json</artifactId>
  254.         <version>1.0.22</version>
  255.     </dependency>
  256.     
  257.     <dependency>
  258.         <groupId>org.codehaus.jackson</groupId>
  259.         <artifactId>jackson-core-asl</artifactId>
  260.         <version>1.9.13</version>
  261.     </dependency>
  263.     
  264.     <dependency>
  265.         <groupId>org.codehaus.jackson</groupId>
  266.         <artifactId>jackson-mapper-asl</artifactId>
  267.         <version>1.9.13</version>
  268.     </dependency>
  270.     
  271.     <dependency>
  272.         <groupId>org.apache.poi</groupId>
  273.         <artifactId>poi-ooxml</artifactId>
  274.         <version>4.0.0</version>
  275.     </dependency>
  277.     
  278.     <dependency>
  279.         <groupId>com.itextpdf.tool</groupId>
  280.         <artifactId>xmlworker</artifactId>
  281.         <version>5.5.7</version>
  282.     </dependency>
  284.     
  285.     <dependency>
  286.         <groupId>commons-lang</groupId>
  287.         <artifactId>commons-lang</artifactId>
  288.         <version>2.6</version>
  289.     </dependency>
  290.     
  291.     <dependency>
  292.         <groupId>org.apache.pdfbox</groupId>
  293.         <artifactId>pdfbox</artifactId>
  294.         <!-- <version>2.0.25</version> -->
  295.         <version>2.0.30</version>
  296.     </dependency>
  297.     
  298.     <dependency>
  299.         <groupId>com.google.gcm</groupId>
  300.         <artifactId>gcm-server</artifactId>
  301.         <version>1.0.0</version>
  302.     </dependency>
  303.     
  304.     <dependency>
  305.         <groupId>org.quartz-scheduler</groupId>
  306.         <artifactId>quartz</artifactId>
  307.     </dependency>
  308.     
  309.     <dependency>
  310.         <groupId>org.projectlombok</groupId>
  311.         <artifactId>lombok</artifactId>
  312.         <version>1.18.30</version>
  313.         <scope>provided</scope>
  314.     </dependency>
  315.     
  316.     <dependency>
  317.         <groupId>com.ibm.filenet</groupId>
  318.         <artifactId>filenet-jace</artifactId>
  319.         <version>1.0</version>
  320.     </dependency>
  322.     <dependency>
  323.         <groupId>com.ibm.filenet</groupId>
  324.         <artifactId>filenet-pe</artifactId>
  325.         <version>1.0</version>
  326.     </dependency>
  328.     <dependency>
  329.         <groupId>com.ibm.filenet</groupId>
  330.         <artifactId>filenet-pe-resources</artifactId>
  331.         <version>1.0</version>
  332.     </dependency>
  333.     
  334.     <dependency>
  335.         <groupId>com.ibm.filenet</groupId>
  336.         <artifactId>filenet-java-api</artifactId>
  337.         <version>1.0</version>
  338.     </dependency>
  340.     <dependency>
  341.         <groupId>com.ibm.applicationservices</groupId>
  342.         <artifactId>application.services</artifactId>
  343.         <version>1.0</version>
  344.     </dependency>
  346.     
  347.     
  348.     <dependency>
  349.         <groupId>org.slf4j</groupId>
  350.         <artifactId>log4j-over-slf4j</artifactId>
  351.     </dependency>
  352.     
  353. </dependencies>

字符串
当尝试获取缓冲图像时，如下所示：

  1. public BufferedImage generateJasperReportPDF(JasperPrint jasperPrint, String fontName, String fontPath)
  2.             throws IOException {
  3.         JRPdfExporter exporter = new JRPdfExporter();
  4.         BufferedImage bimage = null;
  5.         ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
  6.         PDDocument document = null;
  7.         try {
  9.             exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
  10.             exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, outputStream);
  11.             exporter.exportReport();
  13.             document = PDDocument.load(outputStream.toByteArray());
  14.             PDFRenderer renderer = new PDFRenderer(document);
  15.             bimage = renderer.renderImageWithDPI(0, 300, ImageType.RGB);
  17.         } catch (Exception e) {
  18.             log.error("Exception in generateJasperReportPDF: ", e);
  19.         } finally {
  20.             if (outputStream != null)
  21.                 outputStream.close();
  22.             if (document != null)
  23.                 document.close();
  24.         }
  25.         return bimage;
  26.     }

型
当下面的行被执行时，我得到了以下异常：

  1. bimage = renderer.renderImageWithDPI(0, 300, ImageType.RGB);

型
例外情况是：

  1. Caused by: java.lang.LinkageError: loading constraint violation when resolving method "javax/imageio/metadata/IIOMetadata.getAsTree(Ljava/lang/String;)Lorg/w3c/dom/Node;" : loader "com/ibm/ws/classloader/CompoundClassLoader@a24fe2b5" of class "org/apache/pdfbox/filter/DCTFilter" and loader "com/ibm/oti/vm/BootstrapClassLoader@9e7c1335" of class "javax/imageio/metadata/IIOMetadata" have different types for the method signature
  2.     at org.apache.pdfbox.filter.DCTFilter.getNumChannels(DCTFilter.java:387) ~[pdfbox-2.0.30.jar:2.0.30]
  3.     at org.apache.pdfbox.filter.DCTFilter.decode(DCTFilter.java:95) ~[pdfbox-2.0.30.jar:2.0.30]
  4.     at org.apache.pdfbox.cos.COSInputStream.create(COSInputStream.java:87) ~[pdfbox-2.0.30.jar:2.0.30]
  5.     at org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:175) ~[pdfbox-2.0.30.jar:2.0.30]
  6.     at org.apache.pdfbox.pdmodel.common.PDStream.createInputStream(PDStream.java:243) ~[pdfbox-2.0.30.jar:2.0.30]
  7.     at org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.createInputStream(PDImageXObject.java:901) ~[pdfbox-2.0.30.jar:2.0.30]
  8.     at org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.from8bit(SampledImageReader.java:507) ~[pdfbox-2.0.30.jar:2.0.30]
  9.     at org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.getRGBImage(SampledImageReader.java:226) ~[pdfbox-2.0.30.jar:2.0.30]
  10.     at org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.getImage(PDImageXObject.java:514) ~[pdfbox-2.0.30.jar:2.0.30]
  11.     at org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.getImage(PDImageXObject.java:477) ~[pdfbox-2.0.30.jar:2.0.30]
  12.     at org.apache.pdfbox.rendering.PageDrawer.drawImage(PageDrawer.java:1116) ~[pdfbox-2.0.30.jar:2.0.30]
  13.     at org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:67) ~[pdfbox-2.0.30.jar:2.0.30]
  14.     at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:958) ~[pdfbox-2.0.30.jar:2.0.30]
  15.     at org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:531) ~[pdfbox-2.0.30.jar:2.0.30]
  16.     at org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:506) ~[pdfbox-2.0.30.jar:2.0.30]
  17.     at org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:150) ~[pdfbox-2.0.30.jar:2.0.30]
  18.     at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:288) ~[pdfbox-2.0.30.jar:2.0.30]
  19.     at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:355) ~[pdfbox-2.0.30.jar:2.0.30]
  20.     at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:272) ~[pdfbox-2.0.30.jar:2.0.30]
  21.     at org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:258) ~[pdfbox-2.0.30.jar:2.0.30]

型

**UPDATE：**在检查Websphere Class loader viewer时，我发现类IIOMetadata只存在一次

  1. <class>
  2.       <name>javax.imageio.metadata.IIOMetadata</name>
  3.       <interface>false</interface>
  4.    </class>

型

  • 类加载器顺序如下：


的数据

Java

2条答案

按热度按时间
owfi6suc

owfi6suc1#

这个问题几乎可以肯定是在方法签名org/w3c/dom/Node中提到的DOM类的重复可见性。考虑到问题的描述和异常文本中的细节，我相信发生了以下模式：

  1. DCTFilter类是从最后一个父类的应用程序类加载器加载的。它引用IIOMetadata，并可能调用该类的getAsTree（）方法，这意味着它还必须引用Node。
    1.加载依赖项时，使用DCTFilter的类加载器加载它们。ImageIO库没有打包在应用程序中（假设您确认它们只加载一次），并且由系统类加载器找到。DOM类可能打包在应用程序中，因此Node可以在应用程序中找到。
    1.当IIOMetadata类被链接并加载其依赖项时，XML类在JDK中本地找到，因此在那里找到Node的第二个示例。
  2. DCTFilter现在可以看到org/w3c/dom/Node的两个不同版本-直接看到应用程序中的副本，间接通过IIOMetadata看到JDK中的副本。这是非法的，并且会抛出LinkageError。
    最简单的解决方案是从应用程序中删除XML库- JAXP长期以来一直包含在JDK中，并且基本上没有理由应用程序需要使用此API的自己版本。删除包含DOM类的jar应该可以解决该特定错误。
    一个更大的问题可能是为什么你首先要使用parent-last class loader委托。虽然它支持某些应用程序打包设置，但它基本上是导致这样的错误的唯一方法，通常应用程序最好使用服务器的Java EE副本。除非您有特定的技术原因，否则最好的解决方案可能是将类加载器委托切换回默认值。
赞(0）分享  回复(0）举报  2024-01-05
crcmnpdw

crcmnpdw2#

我按照Jarid的建议解决了这个问题，删除了以下所有冲突的库：

  • xml apis
  • xercesImpl
  • axis-jaxrpc
赞(0）分享  回复(0）举报  2024-01-05
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