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XHTML 对 Thymeleaf 的基本支持？设置问题

java spring thymeleaf
2022-09-02 10:57:13

我试图让Spring 4.1.9和Thymeleaf 2.1.5呈现XHTML Basic 1.1页面，这些页面具有以下前言：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN"
    "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">

简单地在模板中使用它是行不通的，因为Thymeleaf无法识别文档类型。

org.thymeleaf.exceptions.TemplateProcessingException： PublicID “-//W3C//DTD XHTML Basic 1.1//EN” 和 SYSTEMID “http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd” 请求的不受支持的实体。确保相应的 org.thymeleaf.doctype.resolution.IDocTypeResolutionEntry 实现由您的方言提供 （index：1）

设置

我浏览了Thymeleaf扩展文档和源代码，并以此为起点，定义了一种继承自SpringStandardDialect的新方言。我通过反复试验找出了缺失的模块，从 w3.org 下载它们并将它们添加到我的项目的资源目录中：

Xhtml基本方言.java

import java.util.LinkedHashSet;
import java.util.Set;

import org.thymeleaf.doctype.DocTypeIdentifier;
import org.thymeleaf.doctype.resolution.ClassLoaderDocTypeResolutionEntry;
import org.thymeleaf.doctype.resolution.IDocTypeResolutionEntry;
import org.thymeleaf.spring4.dialect.SpringStandardDialect;

public class XhtmlBasicDialect extends SpringStandardDialect {
    private static final String DTD_STANDARD_PATH = "org/thymeleaf/dtd/standard/";

    private static final DocTypeIdentifier XHTML_BASIC_11_PUBLICID = DocTypeIdentifier.forValue("-//W3C//DTD XHTML Basic 1.1//EN");
    private static final DocTypeIdentifier XHTML_BASIC_11_SYSTEMID = DocTypeIdentifier.forValue("http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd");
    private static final DocTypeIdentifier ENTITIES_XHTML_BASIC_11_DOCUMENT_MODEL_1_PUBLICID = DocTypeIdentifier.forValue("-//W3C//ENTITIES XHTML Basic 1.1 Document Model 1.0//EN");
    private static final DocTypeIdentifier ELEMENTS_XHTML_BASIC_TABLES_1_PUBLICID = DocTypeIdentifier.forValue("-//W3C//ELEMENTS XHTML Basic Tables 1.0//EN");
    private static final DocTypeIdentifier ELEMENTS_XHTML_INPUTMODE_1_PUBLICID = DocTypeIdentifier.forValue("-//W3C//ELEMENTS XHTML Inputmode 1.0//EN");
    private static final DocTypeIdentifier ELEMENTS_XHTML_TARGET_1_PUBLICID = DocTypeIdentifier.forValue("-//W3C//ELEMENTS XHTML Target 1.0//EN");
    private static final IDocTypeResolutionEntry XHTML_BASIC_STRICT_DOC_TYPE_RESOLUTION_ENTRY = new ClassLoaderDocTypeResolutionEntry(XHTML_BASIC_11_PUBLICID, XHTML_BASIC_11_SYSTEMID, DTD_STANDARD_PATH + "xhtml-basic11.dtd");
    private static final IDocTypeResolutionEntry ENTITIES_XHTML_BASIC_11_DOCUMENT_MODEL_1_DOC_TYPE_RESOLUTION_ENTRY = new ClassLoaderDocTypeResolutionEntry(ENTITIES_XHTML_BASIC_11_DOCUMENT_MODEL_1_PUBLICID, DocTypeIdentifier.ANY, DTD_STANDARD_PATH + "xhtml-basic11-model-1.mod");
    private static final IDocTypeResolutionEntry ELEMENTS_XHTML_BASIC_TABLES_1_DOC_TYPE_RESOLUTION_ENTRY = new ClassLoaderDocTypeResolutionEntry(ELEMENTS_XHTML_BASIC_TABLES_1_PUBLICID, DocTypeIdentifier.ANY, DTD_STANDARD_PATH + "xhtml-basic-table-1.mod");
    private static final IDocTypeResolutionEntry ELEMENTS_XHTML_INPUTMODE_1_DOC_TYPE_RESOLUTION_ENTRY = new ClassLoaderDocTypeResolutionEntry(ELEMENTS_XHTML_INPUTMODE_1_PUBLICID, DocTypeIdentifier.ANY, DTD_STANDARD_PATH + "xhtml-inputmode-1.mod");
    private static final IDocTypeResolutionEntry ELEMENTS_XHTML_TARGET_1_DOC_TYPE_RESOLUTION_ENTRY = new ClassLoaderDocTypeResolutionEntry(ELEMENTS_XHTML_TARGET_1_PUBLICID, DocTypeIdentifier.ANY, DTD_STANDARD_PATH + "xhtml-target-1.mod");

    @Override
    protected Set<IDocTypeResolutionEntry> getAdditionalDocTypeResolutionEntries() {
        final Set<IDocTypeResolutionEntry> docTypeResolutionEntries = new LinkedHashSet<IDocTypeResolutionEntry>();
        docTypeResolutionEntries.add(XHTML_BASIC_STRICT_DOC_TYPE_RESOLUTION_ENTRY);
        docTypeResolutionEntries.add(ENTITIES_XHTML_BASIC_11_DOCUMENT_MODEL_1_DOC_TYPE_RESOLUTION_ENTRY);
        docTypeResolutionEntries.add(ELEMENTS_XHTML_BASIC_TABLES_1_DOC_TYPE_RESOLUTION_ENTRY);
        docTypeResolutionEntries.add(ELEMENTS_XHTML_INPUTMODE_1_DOC_TYPE_RESOLUTION_ENTRY);
        docTypeResolutionEntries.add(ELEMENTS_XHTML_TARGET_1_DOC_TYPE_RESOLUTION_ENTRY);
        return docTypeResolutionEntries;
    }
}

我按如下方式配置自定义方言：

mvc-config.xml

...
<bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
    <property name="prefix" value="/WEB-INF/templates/" />
    <property name="suffix" value=".xhtml" />
    <property name="characterEncoding" value="UTF-8" />
    <property name="templateMode" value="XHTML" />
    <property name="xhtmlTemplateModePatterns" value="*.xhtml" /> 
</bean>

<bean id="templateEngine" class="org.thymeleaf.spring4.SpringTemplateEngine">
    <property name="templateResolver" ref="templateResolver" />
    <property name="additionalDialects">
        <set>
            <bean class="demo.XhtmlBasicDialect" />
        </set>
    </property>
</bean>

<bean id="xhtmlViewResolver" class="org.thymeleaf.spring4.view.ThymeleafViewResolver">
    <property name="templateEngine" ref="templateEngine" />
    <property name="characterEncoding" value="UTF-8" />
    <property name="contentType" value="application/xhtml+xml" />
</bean>
...

我的模板如下：

演示模板.xhtml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN"
    "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <title>Demo</title>
        <link th:href="${'style' + '.css'}" rel="stylesheet" type="text/css"/>
    </head>
    <body>      
        <div>
            <p>Demo content</p>
        </div>
    </body>
</html>

问题

乍一看，这似乎呈现得很好，除了生成的XHTML缺少XML标头，并且有几个额外的属性被添加到每个元素中。

渲染输出：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="-//W3C//DTD XHTML Basic 1.1//EN">
    <head xmlns="http://www.w3.org/1999/xhtml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
        <title xmlns="http://www.w3.org/1999/xhtml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">Demo</title>
        <link rel="stylesheet" type="text/css" xmlns="http://www.w3.org/1999/xhtml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:space="preserve" href="style.css" />
    </head>
    <body xmlns="http://www.w3.org/1999/xhtml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:space="preserve">      
        <div xmlns="http://www.w3.org/1999/xhtml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:space="preserve">
            <p xmlns="http://www.w3.org/1999/xhtml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:space="preserve">Demo content</p>
        </div>
    </body>
</html>

这与XHTML Basic的预制版并不完全匹配;首先，我想保留XML声明<?xml version="1.0" encoding="utf-8"?>

更重要的是，我不希望将 、 和属性添加到几乎每个元素中。还有一个属性添加到元素中。xmlns="http://www.w3.org/1999/xhtml"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xml:space="preserve"version="-//W3C//DTD XHTML Basic 1.1//EN"<html>

我是否做错了什么，我是否需要以不同的方式配置某些内容，或者我是否从自定义方言中遗漏了某些内容？


答案 1

好吧，我没有“规范”证据表明XHTML Basic模板不能按照你想要的方式处理Thymeleaf 2.x，并且可能有一种方法可以给予足够的努力。但我确实看到了：

这一点，以及我自己为使某些东西正常工作而进行的挣扎，使我相信Thymeleaf 2.X中的XHTML处理从未完全烘焙过。但是，它似乎在3.0中运行良好，无需特别努力。只需按如下方式配置一个：ViewResolver

<bean id="viewResolver" class="org.thymeleaf.spring4.view.ThymeleafViewResolver">
    <property name="characterEncoding" value="UTF-8"/>
    <property name="templateEngine">
        <bean class="org.thymeleaf.spring4.SpringTemplateEngine">
            <property name="enableSpringELCompiler" value="true"/>
            <property name="templateResolver">
                <bean class="org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver">
                    <property name="prefix" value="/WEB-INF/templates/"/>
                    <property name="suffix" value=".xhtml"/>
                    <property name="templateMode" value="XML"/>
                </bean>
            </property>
        </bean>
    </property>
</bean>

我在github上发布了一个完整的工作示例。


答案 2

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