DUBBO: xml文件无法解析

心已赠人 2021-12-01 15:36 305阅读 0赞

[DUBBO: xml文件无法解析][DUBBO_ xml]

xml是：

<beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
           xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    
        <dubbo:application name="platform_system_provider" owner="platform_system_provider" organization="llk" logger="slf4j" />
    
    
    　　...

java

package com.example.test_dubbo;
    
    import org.apache.commons.collections.map.MultiValueMap;
    import org.springframework.beans.MutablePropertyValues;
    import org.springframework.beans.PropertyValue;
    import org.springframework.beans.factory.config.BeanDefinition;
    import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
    import org.springframework.beans.factory.xml.XmlBeanFactory;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import org.springframework.core.io.FileSystemResource;
    
    import java.util.*;
    
    public class DubboXmlDetectorL {
    
        public static void main(String[] args) {
    
            String dubboXML = "E:\\dev\\erdp2\\erdp_system\\erdp_system_app\\src\\main\\resources\\dubbo.xml";
            String dubboXML2 = "E:\\dev\\ppm\\platform_system\\02_Src\\platform_system\\platform_system_provider\\src\\main\\resources\\dubbo-provider.xml";
            compareDubboXml(dubboXML, dubboXML2);
        }
    
        private static void compareDubboXml(String dubboXML, String dubboXML2) {
            System.out.println("left = " + dubboXML);
            Set list1 = getDobboXml(dubboXML);
            System.out.println("right = " + dubboXML2);
            Set list2 = getDobboXml(dubboXML2);
    
            System.out.println("left = " + list1);
            System.out.println("right = " + list2);
    
            Set set2 = new HashSet(list1);
            list1.removeAll(list2);
            System.out.println("list111 = " + list1);
    
            list2.removeAll(set2);
            System.out.println("list222 = " + list2);
    
        }
    
        private static Set getDobboXml(String dubboXML) {
            XmlBeanFactory xmlBeanFactory = new XmlBeanFactory(new FileSystemResource(dubboXML));
            String[] beanDefinitionNames = xmlBeanFactory.getBeanDefinitionNames();
    
            MultiValueMap multiValueMap = new MultiValueMap();
            for (int i = 0; i < beanDefinitionNames.length; i++) {
                String beanDefinitionName = beanDefinitionNames[i];
                BeanDefinition beanDefinition = xmlBeanFactory.getBeanDefinition(beanDefinitionName);
                Class<? extends BeanDefinition> aClass = beanDefinition.getClass();
    
                Object anInterface = beanDefinition.getAttribute("interface");
    //            System.out.println("anInterface = " + anInterface);
                MutablePropertyValues propertyValues = beanDefinition.getPropertyValues();
                PropertyValue anInterface1 = propertyValues.getPropertyValue("interface");
    
                if (anInterface1 != null) {
                    String  interfaceProp = (String) anInterface1.getValue();
                    PropertyValue version = propertyValues.getPropertyValue("version");
                    PropertyValue group = propertyValues.getPropertyValue("group");
    
                    String key = interfaceProp;//+":"+ (version==null?"":version.getValue())+ ":" + (group==null?"":group.getValue());
                    if (multiValueMap.containsKey(key)) {
    
                    }
                    multiValueMap.put(key, beanDefinitionName);
                }
    
            }
    
            Set set = multiValueMap.entrySet();
            for (Iterator iterator = set.iterator(); iterator.hasNext(); ) {
                Object entry =  iterator.next();
                if (entry instanceof Map.Entry) {
                    ArrayList value = (ArrayList) ((Map.Entry) entry).getValue();
                    if (value.size() > 1) {
                        System.out.println("                   = " + entry );
                    }
                }
            }
    
            return multiValueMap.keySet();
        }
    
        private static void test1() {
            String xmls = "E:\\dev\\erdp2\\erdp_discuss\\erdp_discuss_app\\src\\main\\resources\\dubbo.xml\n" +
                    "E:\\dev\\erdp2\\erdp_doc\\erdp_doc_app\\src\\main\\resources\\dubbo.xml\n" +
                    "E:\\dev\\erdp2\\erdp_project\\erdp_project_app\\src\\main\\resources\\dubbo.xml\n" +
                    "E:\\dev\\erdp2\\erdp_scheduler\\erdp_scheduler_app\\src\\main\\resources\\dubbo.xml\n" +
                    "E:\\dev\\erdp2\\erdp_system\\erdp_system_app\\src\\main\\resources\\dubbo.xml\n" +
                    "E:\\dev\\erdp2\\erdp_workflow\\erdp_workflow_app\\src\\main\\resources\\dubbo.xml";
            String[] split = xmls.split("\n");
            for (int i = 0; i < split.length; i++) {
                String s = split[i];
                System.out.println("XML = " + s);
                detectDobboXml(s);
            }
    
            String dubboXML = "E:\\dev\\erdp2\\erdp_doc\\erdp_doc_app\\src\\main\\resources\\dubbo.xml";
            dubboXML = "dubbo.xml";
            dubboXML = "E:\\dev\\erdp2\\test_nacos\\src\\test\\java\\dubbo.xml";
    //        detectDobboXml(dubboXML);
        }
    
        private static void detectDobboXml(String dubboXML) {
            XmlBeanFactory xmlBeanFactory = new XmlBeanFactory(new FileSystemResource(dubboXML));
            String[] beanDefinitionNames = xmlBeanFactory.getBeanDefinitionNames();
    
    //        DefaultListableBeanFactory bdr = new DefaultListableBeanFactory();
    //        bdr.set
    //        XmlBeanDefinitionReader xmlBeanDefinitionReader = new XmlBeanDefinitionReader(bdr);
    //        NamespaceHandlerResolver namespaceHandlerResolver = xmlBeanDefinitionReader.getNamespaceHandlerResolver();
    //        System.out.println("namespaceHandlerResolver = " + namespaceHandlerResolver);
    //        NamespaceHandlerResolver nsr = new DefaultNamespaceHandlerResolver();
    //        xmlBeanDefinitionReader.setNamespaceHandlerResolver(nsr);
    
            MultiValueMap multiValueMap = new MultiValueMap();
            for (int i = 0; i < beanDefinitionNames.length; i++) {
                String beanDefinitionName = beanDefinitionNames[i];
    //            System.out.println("beanDefinitionName = " + beanDefinitionName);
                BeanDefinition beanDefinition = xmlBeanFactory.getBeanDefinition(beanDefinitionName);
    //            System.out.println("beanDefinition = " + beanDefinition);
                Class<? extends BeanDefinition> aClass = beanDefinition.getClass();
    
                Object anInterface = beanDefinition.getAttribute("interface");
    //            System.out.println("anInterface = " + anInterface);
                MutablePropertyValues propertyValues = beanDefinition.getPropertyValues();
                PropertyValue anInterface1 = propertyValues.getPropertyValue("interface");
    //            System.out.println("anInterface1 = " + anInterface1);
    //            propertyValues.getPropertyValueList();
    
                if (anInterface1 != null) {
                    String  interfaceProp = (String) anInterface1.getValue();
                    PropertyValue version = propertyValues.getPropertyValue("version");
                    PropertyValue group = propertyValues.getPropertyValue("group");
    
                    String key = interfaceProp+":"+ (version==null?"":version.getValue())+ ":" + (group==null?"":group.getValue());
    //            System.out.println("aClass = " + aClass);
                    if (multiValueMap.containsKey(key)) {
    //                    multiValueMap.put(interfaceProp, beanDefinitionName);
    //                    System.out.println("beanDefinitionName = " + beanDefinitionName + " interface = " + interfaceProp);
    //                    System.out.println(" interface = " + interfaceProp + "  beanDefinitionNames = " + multiValueMap.get(interfaceProp));
                    }
                    multiValueMap.put(key, beanDefinitionName);
    //                multiValueMap.put(interfaceProp, aClass);
                }
    
            }
    
    //        Object dubbo = xmlBeanFactory.getBean("dubbo");
    //        System.out.println("dubbo = " + dubbo);
    //        BeanDefinition dubbo1 = xmlBeanFactory.getBeanDefinition("dubbo");
    //        System.out.println("dubbo1 = " + dubbo1.getClass());
    
            Set set = multiValueMap.entrySet();
            for (Iterator iterator = set.iterator(); iterator.hasNext(); ) {
                Object entry =  iterator.next();
    //            System.out.println("entry = " + entry + " v " + multiValueMap.get(entry));
                if (entry instanceof Map.Entry) {
                    ArrayList value = (ArrayList) ((Map.Entry) entry).getValue();
    //                System.out.println("value = " + value.size());
                    if (value.size() > 1) {
                        System.out.println("                   = " + entry );
                    }
                }
    //            Collection collection = multiValueMap.getCollection(entry);
    //            if (collection != null && collection.size() > 1) {
    //                System.out.println("key = " + entry);
    //                dumpCollection(collection);
    //            }
            }
    
    //        Collection values = multiValueMap.values();
    //        System.out.println("values = " + values);
        }
    
        private static void dumpCollection(Collection values) {
            for (Iterator iterator = values.iterator(); iterator.hasNext(); ) {
                Object next = iterator.next();
                System.out.println("next = " + next);
            }
        }
    
        private static void test() {
            String dubboXML = "E:\\dev\\erdp2\\erdp_doc\\erdp_doc_app\\src\\main\\resources\\dubbo.xml";
            dubboXML = "dubbo.xml";
            ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
                    new String[]{dubboXML});
            context.start();
    
            ConfigurableListableBeanFactory beanFactory = context.getBeanFactory();
            String[] beanDefinitionNames = beanFactory.getBeanDefinitionNames();
            for (int i = 0; i < beanDefinitionNames.length; i++) {
                String beanDefinitionName = beanDefinitionNames[i];
                System.out.println("beanDefinitionName = " + beanDefinitionName);
            }
        }
    }

出现错误：dubbo  通配符的匹配很全面, 但无法找到元素 'dubbo:service' 的声明。

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10:05:44.125 [main] WARN  o.s.b.f.xml.XmlBeanDefinitionReader - Ignored XML validation warning
    org.xml.sax.SAXParseException: schema_reference.4: 无法读取方案文档 'http://code.alibabatech.com/schema/dubbo/dubbo.xsd', 原因为 1) 无法找到文档; 2) 无法读取文档; 3) 文档的根元素不是 <xsd:schema>。
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.warning(ErrorHandlerWrapper.java:99)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:392)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:306)
        at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.reportSchemaErr(XSDHandler.java:4158)
        at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.reportSchemaWarning(XSDHandler.java:4149)
        at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.getSchemaDocument1(XSDHandler.java:2491)
        at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.getSchemaDocument(XSDHandler.java:2193)
        at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.parseSchema(XSDHandler.java:578)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadSchema(XMLSchemaLoader.java:610)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.findSchemaGrammar(XMLSchemaValidator.java:2447)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1768)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.emptyElement(XMLSchemaValidator.java:761)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:351)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2784)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:842)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:771)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
        at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)
        at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339)
        at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:77)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadDocument(XmlBeanDefinitionReader.java:434)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:392)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
        at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:79)
        at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:67)
        at com.example.test_nacos.DetectorL.detectDobboXml(DetectorL.java:43)
        at com.example.test_nacos.DetectorL.main(DetectorL.java:33)
    Caused by: java.net.ConnectException: Connection timed out: connect
        at java.net.DualStackPlainSocketImpl.connect0(Native Method)
        at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:589)
        at java.net.Socket.connect(Socket.java:538)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
        at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
        at sun.net.www.http.HttpClient.New(HttpClient.java:339)
        at sun.net.www.http.HttpClient.New(HttpClient.java:357)
        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
        at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1564)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:647)
        at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:148)
        at com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaParsingConfig.parse(SchemaParsingConfig.java:583)
        at com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaParsingConfig.parse(SchemaParsingConfig.java:686)
        at com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaDOMParser.parse(SchemaDOMParser.java:530)
        at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.getSchemaDocument(XSDHandler.java:2181)
        ... 24 common frames omitted
    Exception in thread "main" org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 8 in XML document from file [E:\dev\erdp2\erdp_discuss\erdp_discuss_app\src\main\resources\dubbo.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 8; columnNumber: 51; cvc-complex-type.2.4.c: 通配符的匹配很全面, 但无法找到元素 'dubbo:application' 的声明。
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:404)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
        at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:79)
        at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:67)
        at com.example.test_nacos.DetectorL.detectDobboXml(DetectorL.java:43)
        at com.example.test_nacos.DetectorL.main(DetectorL.java:33)
    Caused by: org.xml.sax.SAXParseException; lineNumber: 8; columnNumber: 51; cvc-complex-type.2.4.c: 通配符的匹配很全面, 但无法找到元素 'dubbo:application' 的声明。
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:396)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:284)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(XMLSchemaValidator.java:453)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.reportSchemaError(XMLSchemaValidator.java:3231)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1912)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.emptyElement(XMLSchemaValidator.java:761)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:351)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2784)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:842)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:771)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
        at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)
        at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339)
        at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:77)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadDocument(XmlBeanDefinitionReader.java:434)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:392)
        ... 6 more

启动过程中，感觉会去下载，但是下载了好一会却下载不成功。。

其实 Spring提供了一种机制，默认从本地加载XSD文件 。仔细检查，好像命名空间有问题， 是dubbo从2.6.5升级到 2.7.1 引起的吗？ code.alibabatech.com 改成 dubbo.apache.org ，还是不行：

Unable to locate Spring NamespaceHandler for XML schema namespace \[http://dubbo.apache.org/schema/dubbo\]

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Exception in thread "main" org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://dubbo.apache.org/schema/dubbo]
    Offending resource: file [E:\dev\erdp2\erdp_system\erdp_system_app\src\main\resources\dubbo.xml]
    
        at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:72)
        at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:119)
        at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:111)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.error(BeanDefinitionParserDelegate.java:281)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1363)
        at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1352)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:179)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:149)
        at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:96)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:513)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:393)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
        at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
        at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:79)
        at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:67)
        at com.example.test_nacos.DetectorL.getDobboXml(DetectorL.java:42)
        at com.example.test_nacos.DetectorL.compareDubboXml(DetectorL.java:25)
        at com.example.test_nacos.DetectorL.main(DetectorL.java:20)

想起来了之前读spring源码的时候， 对应于每一个xml 的命名空间，spring 都需要一个NamespaceHandler，比如Context需要  ContextNamespaceHandler  。  
难道要修改jar 的spring.handlers/spring.schemas 文件？ 检查 spring-context-5.1.5.RELEASE\\META-INF\\spring.handlers ，发现基本正常

http\\://www.springframework.org/schema/context=org.springframework.context.config.ContextNamespaceHandler  
http\\://www.springframework.org/schema/jee=org.springframework.ejb.config.JeeNamespaceHandler  
http\\://www.springframework.org/schema/lang=org.springframework.scripting.config.LangNamespaceHandler  
http\\://www.springframework.org/schema/task=org.springframework.scheduling.config.TaskNamespaceHandler  
http\\://www.springframework.org/schema/cache=org.springframework.cache.config.CacheNamespaceHandler

突然想到，dubbo-jar 都没有引入呢！

<dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo</artifactId>
                <version>2.7.1</version>
            </dependency>

加入就好了！

\------------------------------------------------------------------------------------------------------------------------------------------------  
总结一下

这样的问题，通常是由于升级引起的，特别是有些jar升级后不兼容之前的版本就会出现。  
但Spring很贴心，把旧版本的XSD文件也全放了。这样可以防止升级了Spring版本，而配置文件里用的还是旧版本的XSD文件，然后断网了，应用启动不了。

我解压dubbo jar之后看到spring-context-5.1.5.RELEASE\\META-INF\\spring.schemas ：

![493842-20190530113326293-2031222703.png][]

可见，基本上都有了。但是xsd 只有一个：

![493842-20190530113444393-738079848.png][]

所以，如果用最新的jar ，然后xml配置老的 命名空间，那么还是会去下载xsd。下载

参考  
https://dslztx.github.io/blog/2019/02/20/Unable-to-locate-Spring-NamespaceHandler-for-XML-schema-namespace/  
https://www.jianshu.com/p/b16a4384dfdb  
https://blog.csdn.net/wcf2010/article/details/86229222  
https://blog.csdn.net/wxydaisy/article/details/40650405

posted on 2019-05-30 11:39 [CanntBelieve][] 阅读( ...) 评论( ...) [编辑][Link 1] 收藏

转载于:https://www.cnblogs.com/FlyAway2013/p/10948692.html

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