2.两种解析器 EntityResolver 就是用来处理 XML 验证的。 我们先来看下 EntityResolver 接口的定义: public interface EntityResolver { public abstract InputSource resolveEntity = ".xsd"; private final EntityResolver dtdResolver; private final EntityResolver schemaResolver; 在上篇文章中,我们获取 EntityResolver 是通过 getEntityResolver 方法来获取的: protected EntityResolver getEntityResolver() { if (this.entityResolver == null) { // Determine default EntityResolver to use.
xml解析时是否验证文档 entityResolver 加载dtd文件 variables 配置文件定义的值 xpath Xpath对象,用于对XML文件节点的操作 XPathParser 对象构造函数有 : 函数里面都处理了两件事: public XPathParser(Reader reader, boolean validation, Properties variables, EntityResolver entityResolver) { commonConstructor(validation, variables, entityResolver); this.document private void commonConstructor(boolean validation, Properties variables, EntityResolver entityResolver ) { this.validation = validation; this.entityResolver = entityResolver; this.variables
entityResolver, ErrorHandler errorHandler, int validationMode, boolean namespaceAware) throws 的细节 protected DocumentBuilder createDocumentBuilder(DocumentBuilderFactory factory, @Nullable EntityResolver entityResolver, @Nullable ErrorHandler errorHandler) throws ParserConfigurationException DocumentBuilder docBuilder = factory.newDocumentBuilder(); if (entityResolver ! = null) { docBuilder.setEntityResolver(entityResolver); } if (errorHandler !
第二个 EntityResolver 主要是处理文件的验证方式的。 第三个 ErrorHandler 是一个错误处理器。 第四个 validationMode 是指 XML 文件的验证模式。 具体的调用如下: public Document loadDocument(InputSource inputSource, EntityResolver entityResolver, ErrorHandler + factory.getClass().getName() + "]"); } DocumentBuilder builder = createDocumentBuilder(factory, entityResolver 但是如果大家从来没有研究过 Spring 源码,相信本文中可能还有很多让你疑惑的地方,例如 EntityResolver 到底是干嘛用的?ValidationMode 又是啥?
org.apache.tomcat.util.descriptor.LocalResolver.resolveEntity(LocalResolver.java:154) at com.sun.org.apache.xerces.internal.util.EntityResolver2Wrapper.resolveEntity (EntityResolver2Wrapper.java:176) at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.resolveEntityAsPerStax
public class XPathParser { private final Document document; private boolean validation; private EntityResolver entityResolver; private Properties variables; private XPath xpath; } Document(Document对象) Document EntityResolver (加载本地的DTD文件 如果解析mybatis-config.xml 配置文件,默认联网加载http://mybatis.org/dtd/mybatis-3- config.dtd 在实践中往往会提前设置EntityResolver 接口对象加载本地的DTD 文件,从而避免联网加载DTD文件。 它是EntityResolver子类,xml 的解析会基于事件触发对应的 Resolver 或 Handler,当解析到 dtd 等外部资源时会 EntityResolver的resolveEntity
如果开启的话,会联网加载,否则的话会加载本地的DTD文件进行验证 private boolean validation; // 用于加载本地的 DTD 文件,可以忽略不看 private EntityResolver entityResolver; // 对应 mybatis-config 配置文件中 <properties> 标签 private Properties variables; // } // 构造方法调用,用于为属性赋值 private void commonConstructor(boolean validation, Properties variables, EntityResolver entityResolver) { this.validation = validation; this.entityResolver = entityResolver; this.variables DocumentBuilder builder = factory.newDocumentBuilder(); builder.setEntityResolver(entityResolver
在上面黄框圈中的EntityResolver实例,它的作用是:DTD默认寻找规则是通过网络(即:声明的DTD的URI地址)来下载相应的DTD声明,并进行认证。由于网络原因,下载速度本身就是耗时的。 那么,我们可以通过EntityResolver来实现寻找DTD声明的过程,比如:我们将DTD文件放到项目中的某个路径下,在实现时直接将此文档读取并返回给SAX即可。 黄框中的EntityResolver实例,它是一个接口,并且提供了一个resovleEntity(...)方法,源码如下所示: 那么publicId和systemId是什么呢? systemId=https://www.springframework.org/dtd/spring-beans-2.0.dtd 好了,了解了publicId和systemId之后,我们要将关注点放在对EntityResolver
this.errorHandler, getValidationModeForResource(resource), isNamespaceAware()); } protected EntityResolver getEntityResolver() { if (this.entityResolver == null) { // Determine default EntityResolver to = null) { this.entityResolver = new ResourceEntityResolver(resourceLoader); } else { this.entityResolver = new DelegatingEntityResolver(getBeanClassLoader()); } } return this.entityResolver; } public
(resource), isNamespaceAware()); } loadDocument() 方法接受五个参数: inputSource:加载 Document 的 Resource 源 entityResolver 如果要提供对 XML 名称空间的支持,则为true 对于这五个参数,有两个参数需要重点关注下:entityResolver、validationMode。 loadDocument() 在类 DefaultDocumentLoader 中提供了实现,如下: public Document loadDocument(InputSource inputSource, EntityResolver entityResolver, ErrorHandler errorHandler, int validationMode, boolean namespaceAware) throws + "]"); } // 创建文档解析器 DocumentBuilder builder = createDocumentBuilder(factory, entityResolver
) 第四个参数是一个实体解析器:org.apache.ibatis.builder.xml.XMLMapperEntityResolver,实现了org.xml.sax.EntityResolver 【XMLMapperEntityResolver】实体解析器 org.apache.ibatis.builder.xml.XMLMapperEntityResolver,实现了org.xml.sax.EntityResolver 以下是一个简单地示例,仅仅做一个说明: public class MyResolver implements EntityResolver { public InputSource resolveEntity entityResolver) { // 这个构造器会初始化内部的一个属性:javax.xml.xpath.XPath commonConstructor(validation, variables , entityResolver); // 初始化内部属性:org.w3c.dom.Document,得到一个dom文档 this.document = createDocument(new
此类必须在扩展%XML.SAX.EntityResolver,并且必须实现 resolveEntity()方法,该方法具有以下签名:method resolveEntity(publicID As %Library.String ELEMENT p (#PCDATA)>要阅读本文档,需要如下所示的自定义实体解析器:Class CustomResolver.Resolver Extends %XML.SAX.EntityResolver Else //otherwise call the default resolver { Set res=##class(%XML.SAX.EntityResolver
---------------| i%Document = "2@%XML.Document" <Set>| r%Document = "" <Set>| i%EntityResolver = ""| r%EntityResolver = ""+----------------------------------------------------- DHC-APP 2e1>zw reader.EntityResolver
(resource), isNamespaceAware()); } loadDocument() 方法接受五个参数: inputSource:加载 Document 的 Resource 源 entityResolver 如果要提供对 XML 名称空间的支持,则为true 对于这五个参数,有两个参数需要重点关注下:entityResolver、validationMode。 loadDocument() 在类 DefaultDocumentLoader 中提供了实现,如下: public Document loadDocument(InputSource inputSource, EntityResolver entityResolver, ErrorHandler errorHandler, int validationMode, boolean namespaceAware) throws + "]"); } // 创建文档解析器 DocumentBuilder builder = createDocumentBuilder(factory, entityResolver
; } //* XPathParser public XPathParser(Reader reader, boolean validation, Properties variables, EntityResolver entityResolver) { commonConstructor(validation, variables, entityResolver); this.document = InputSource(reader)); } private void commonConstructor(boolean validation, Properties variables, EntityResolver entityResolver) { this.validation = validation; this.entityResolver = entityResolver; this.variables factory.setExpandEntityReferences(true); DocumentBuilder builder = factory.newDocumentBuilder(); //需要注意的就是定义了EntityResolver
entityResolver) reader:使用字符流创建新的输入源,用于对XML文件的读取 validation:是否进行DTD校验 variables:属性配置信息 entityResolver 系统标示符) XPathParser.java public XPathParser(Reader reader, boolean validation, Properties variables, EntityResolver entityResolver) { commonConstructor(validation, variables, entityResolver); this.document = createDocument new InputSource(reader)); } private void commonConstructor(boolean validation, Properties variables, EntityResolver entityResolver) { this.validation = validation; this.entityResolver = entityResolver; this.variables
entityResolver) reader:使用字符流创建新的输入源,用于对XML文件的读取 validation:是否进行DTD校验 variables:属性配置信息 entityResolver 系统标示符) XPathParser.java public XPathParser(Reader reader, boolean validation, Properties variables, EntityResolver entityResolver) { commonConstructor(validation, variables, entityResolver); this.document = createDocument new InputSource(reader)); } private void commonConstructor(boolean validation, Properties variables, EntityResolver entityResolver) { this.validation = validation; this.entityResolver = entityResolver; this.variables
; //... } public XPathParser(InputStream inputStream, boolean validation, Properties variables, EntityResolver entityResolver) { commonConstructor(validation, variables, entityResolver); //调用jdk方法,生成document树
DocumentBuilder DocumentBuilder docBuilder = factory.newDocumentBuilder(); docBuilder.setEntityResolver(entityResolver entityResolver, ErrorHandler errorHandler) throws ParserConfigurationException { DocumentBuilder docBuilder = factory.newDocumentBuilder(); if (entityResolver ! = null) { docBuilder.setEntityResolver(entityResolver); } if (errorHandler java.io.FileNotFoundException; import java.io.IOException; public class WebXmlDtdResolver implements EntityResolver
CVE-2025-30220: GeoTools库使用Eclipse XSD库来处理XML数据,并且未正确配置EntityResolver,这导致了XML外部实体 (XXE)漏洞。