org.jooq.codegen.GeneratorException：读取 XML 配置时出错答案

【问题标题】：org.jooq.codegen.GeneratorException: Error while reading XML configurationorg.jooq.codegen.GeneratorException：读取 XML 配置时出错
【发布时间】：2019-03-09 14:20:39
【问题描述】：

我正在尝试从 Java 8 迁移到 Java 10，并在使用 JOOQ codegen Maven 插件时遇到以下问题。

我的环境：

java版本“10.0.2”2018-07-17
Apache Maven 3.3.9

pom.xml：

        <plugin>
            <groupId>org.jooq</groupId>
            <artifactId>jooq-codegen-maven</artifactId>
            <version>3.11.5</version>
            <executions>
                <execution>
                ...
                    <goals>
                        <goal>generate</goal>
                    </goals>
                </execution>
            </executions>
            <dependencies>
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>${mysql-version}</version>
                </dependency>
                <dependency>
                    <groupId>javax.xml.bind</groupId>
                    <artifactId>jaxb-api</artifactId>
                    <version>2.3.0</version>
                </dependency>
                <dependency>
                    <groupId>com.sun.xml.bind</groupId>
                    <artifactId>jaxb-core</artifactId>
                    <version>2.2.11</version>
                </dependency>
                <dependency>
                    <groupId>com.sun.xml.bind</groupId>
                    <artifactId>jaxb-impl</artifactId>
                    <version>2.2.11</version>
                </dependency>
                <dependency>
                <groupId>javax.activation</groupId>
                <artifactId>javax.activation-api</artifactId>
                <version>1.2.0</version>
                </dependency>
                <dependency>
                    <groupId>org.jooq</groupId>
                    <artifactId>jooq-codegen</artifactId>
                    <version>3.11.5</version>
                </dependency>
                <dependency>
                    <groupId>org.jooq</groupId>
                    <artifactId>jooq-meta</artifactId>
                    <version>3.11.5</version>
                </dependency>
            </dependencies>
            <configuration>
                <configurationFile>target/my_conf.xml</configurationFile>
            </configuration>
        </plugin>

my_conf.xml 看起来像这样：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<configuration xmlns="http://www.jooq.org/xsd/jooq-codegen-3.11.0.xsd">

    <jdbc>
        <driver>com.mysql.jdbc.Driver</driver>
        <url>jdbc:mysql://${host}/${db_name}</url>
        <user>${user_username}</user>
        <password>${pwds}</password>
    </jdbc>

    <generator>
        <database>
            <name>org.jooq.meta.mysql.MySQLDatabase</name>
            <inputSchema>${db.sf_write_junit_db_name}</inputSchema>
    ...

    </generator>
</configuration>

执行后我看到以下异常：

[ERROR] Failed to execute goal org.jooq:jooq-codegen-maven:3.11.5:generate (jooq-generator-sf_read) on project sf-write-model: Execution jooq-generator-sf_read of goal org.jooq:jooq-codegen-maven:3.11.5:generate failed: org.jooq.codegen.GeneratorException: Error while reading XML configuration: unexpected element (uri:"http://www.jooq.org/xsd/jooq-codegen-3.11.0.xsd", local:"configuration"). Expected elements are <{}configuration> -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.jooq:jooq-codegen-maven:3.11.5:generate (jooq-generator-sf_read) on project sf-write-model: Execution jooq-generator-sf_read of goal org.jooq:jooq-codegen-maven:3.11.5:generate failed: org.jooq.codegen.GeneratorException: Error while reading XML configuration
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
...
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution jooq-generator-sf_read of goal org.jooq:jooq-codegen-maven:3.11.5:generate failed: org.jooq.codegen.GeneratorException: Error while reading XML configuration
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
        ... 20 more
Caused by: java.lang.RuntimeException: org.jooq.codegen.GeneratorException: Error while reading XML configuration
        at org.jooq.codegen.maven.Plugin.execute(Plugin.java:144)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        ... 21 more
Caused by: org.jooq.codegen.GeneratorException: Error while reading XML configuration
        at org.jooq.codegen.GenerationTool.load(GenerationTool.java:925)
        at org.jooq.codegen.maven.Plugin.execute(Plugin.java:139)
        ... 22 more
Caused by: javax.xml.bind.UnmarshalException: unexpected element (uri:"http://www.jooq.org/xsd/jooq-codegen-3.11.0.xsd", local:"configuration"). Expected elements are <{}configuration>
        at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(UnmarshallingContext.java:740)
        at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java:262)
        at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java:257)
        at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportUnexpectedChildElement(Loader.java:124)
        at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext$DefaultRootLoader.childElement(UnmarshallingContext.java:1148)
        at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:573)
        at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:555)
        at com.sun.xml.bind.v2.runtime.unmarshaller.ValidatingUnmarshaller.startElement(ValidatingUnmarshaller.java:102)
        at com.sun.xml.bind.v2.runtime.unmarshaller.SAXConnector.startElement(SAXConnector.java:168)
        at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:509)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:374)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:613)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3058)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:821)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:532)
        at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:888)
        at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:824)
        at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
        at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
        at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:635)
        at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:258)
        at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:229)
        at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:170)
        at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:219)
        at org.jooq.codegen.GenerationTool.load(GenerationTool.java:922)

但是当我将 my_conf.xml 中的内容而不是使用：

<configurationFile>target/my_conf.xml</configurationFile>

这两个选项给出了相同的例外：

<!-- Option 1 -->
                    <dependency>
                        <groupId>javax.activation</groupId>
                        <artifactId>javax.activation-api</artifactId>
                        <version>1.2.0</version>
                    </dependency>
                    <dependency>
                        <groupId>org.glassfish.jaxb</groupId>
                        <artifactId>jaxb-runtime</artifactId>
                        <version>2.3.0.1</version>
                    </dependency>

                    <!-- Option 2 -->
                    <dependency>
                        <groupId>javax.activation</groupId>
                        <artifactId>javax.activation-api</artifactId>
                        <version>1.2.0</version>
                    </dependency>
                    <dependency>
                        <groupId>com.sun.xml.bind</groupId>
                        <artifactId>jaxb-core</artifactId>
                        <version>2.3.0</version>
                    </dependency>
                    <dependency>
                        <groupId>com.sun.xml.bind</groupId>
                        <artifactId>jaxb-impl</artifactId>
                        <version>2.3.0</version>
                    </dependency>

任何想法为什么它会以这种方式工作以及如何使用单独的外部文件进行 JOOQ 配置？

谢谢。

【问题讨论】：

我认为您的依赖项中的 JAXB API 和实现版本不匹配。例如，您可以尝试删除 API 依赖项吗？
我尝试了两个选项：1. com.sun.xml.bind:jaxb-core 2.3.0 和 jaxb-impl 2.3.0 2. org.glassfish.jaxb:jaxb-runtime 2.3。 01 相同的异常原因：javax.xml.bind.UnmarshalException: 意外元素（uri:"jooq.org/xsd/jooq-codegen-3.11.0.xsd", local:"configuration"）。预期元素是
我的问题与我在这里看到的非常相似：stackoverflow.com/questions/52157040/…
@Lukas Eder - 当我更改 org.jooq.meta.jaxb.Configuration 类并添加注释 @XmlRootElement(name = "configuration", namespace = "jooq.org/xsd/jooq-codegen-3.11.0.xsd") - 所以我得到了以下信息: 解组警告 : 意外元素 (uri:"jooq.org/xsd/jooq-codegen-3.11.0.xsd", local:"jdbc")。预期元素是、、
我的调查表明问题出在 Maven 3.5 和 Java 10 中，在类加载注释 javax.xml.bind.annotation.XmlSchema 值时 JOOQ package-info.class 中缺少（从 XSD 生成） .在 Java 8 中，它运行良好，并且包注释的值为“命名空间”->“jooq.org/xsd/jooq-codegen-3.10.0.xsd”。所以我不确定这个问题是在 Maven 3.5 还是 Java 10 中。

标签： maven-3 jooq java-10

【解决方案1】：

@卢卡斯·埃德

此代码适用于 Maven 3.6.0、Jdk 9.0.4、jOOQ 版本 3.10.2、jaxb-api 2.3.1、org.glassfish.jaxb:jaxb-runtime 2.3.1：

package org.jooq.util;

public class GenerationTool {

    public static Configuration load(InputStream in) throws IOException {
            ...

            JAXBContext ctx = JAXBContext.newInstance(Configuration.class);
            Unmarshaller unmarshaller = ctx.createUnmarshaller();
            unmarshaller.setSchema(schema);
            unmarshaller.setEventHandler(new ValidationEventHandler() {
                @Override
                public boolean handleEvent(ValidationEvent event) {
                    log.warn("Unmarshal warning", event.getMessage());
                    return true;
                }
            });

            final SAXParserFactory sax = SAXParserFactory.newInstance();
            sax.setNamespaceAware(false);
            final XMLReader reader = sax.newSAXParser().getXMLReader();
            final Source er = new SAXSource(reader, new InputSource(new StringReader(xml)));
            return (Configuration) unmarshaller.unmarshal(er);
}
}

【讨论】：