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要在Spring Boot中自定义Thymeleaf的标签和属性，你需要遵循以下步骤：
- 添加Thymeleaf依赖
确保你的项目中已经添加了Thymeleaf的依赖。在pom.xml文件中添加以下内容：
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> - 创建自定义标签处理器
首先，创建一个类，实现IProcessor接口，用于处理自定义标签。例如，我们创建一个名为CustomTagProcessor的类：
import org.thymeleaf.context.ITemplateContext; import org.thymeleaf.model.IProcessableElementTag; import org.thymeleaf.processor.element.AbstractElementTagProcessor; import org.thymeleaf.processor.element.IElementTagStructureHandler; import org.thymeleaf.templatemode.TemplateMode; public class CustomTagProcessor extends AbstractElementTagProcessor { private static final String TAG_NAME = "custom"; private static final int PRECEDENCE = 1000; public CustomTagProcessor(String dialectPrefix) { super(TemplateMode.HTML, dialectPrefix, TAG_NAME, true, null, false, PRECEDENCE); } @Override protected void doProcess(ITemplateContext context, IProcessableElementTag tag, IElementTagStructureHandler structureHandler) { // 在这里处理自定义标签的逻辑 String attributeValue = tag.getAttributeValue("attributeName"); // ... 根据属性值进行相应的处理 } } - 创建自定义属性处理器
与创建自定义标签处理器类似，创建一个实现IProcessor接口的类，用于处理自定义属性。例如，我们创建一个名为CustomAttributeProcessor的类：
import org.thymeleaf.context.ITemplateContext; import org.thymeleaf.model.IProcessableElementTag; import org.thymeleaf.processor.element.AbstractAttributeTagProcessor; import org.thymeleaf.processor.element.IElementTagStructureHandler; import org.thymeleaf.templatemode.TemplateMode; public class CustomAttributeProcessor extends AbstractAttributeTagProcessor { private static final String ATTR_NAME = "customAttr"; private static final int PRECEDENCE = 1000; public CustomAttributeProcessor(String dialectPrefix) { super(TemplateMode.HTML, dialectPrefix, null, false, ATTR_NAME, true, PRECEDENCE); } @Override protected void doProcess(ITemplateContext context, IProcessableElementTag tag, AttributeName attributeName, String attributeValue, IElementTagStructureHandler structureHandler) { // 在这里处理自定义属性的逻辑 // ... 根据属性值进行相应的处理 } } - 创建自定义方言
接下来，创建一个实现IDialect接口的类，用于注册自定义标签和属性处理器。例如，我们创建一个名为CustomDialect的类：
import org.thymeleaf.dialect.AbstractProcessorDialect; import org.thymeleaf.processor.IProcessor; import java.util.HashSet; import java.util.Set; public class CustomDialect extends AbstractProcessorDialect { private static final String DIALECT_NAME = "Custom Dialect"; private static final String DIALECT_PREFIX = "custom"; public CustomDialect() { super(DIALECT_NAME, DIALECT_PREFIX, 1000); } @Override public Set<IProcessor> getProcessors(String dialectPrefix) { Set<IProcessor> processors = new HashSet<>(); processors.add(new CustomTagProcessor(dialectPrefix)); processors.add(new CustomAttributeProcessor(dialectPrefix)); return processors; } } - 注册自定义方言
最后，需要将自定义方言注册到Thymeleaf中。创建一个配置类，继承WebMvcConfigurer，并重写addViewControllers方法，将自定义方言添加到templateEngine中：
import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; import org.thymeleaf.spring5.SpringTemplateEngine; import org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver; import org.thymeleaf.spring5.view.ThymeleafViewResolver; @Configuration public class WebConfig implements WebMvcConfigurer { @Bean public SpringResourceTemplateResolver templateResolver() { SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver(); templateResolver.setPrefix("/WEB-INF/templates/"); templateResolver.setSuffix(".html"); return templateResolver; } @Bean public SpringTemplateEngine templateEngine() { SpringTemplateEngine templateEngine = new SpringTemplateEngine(); templateEngine.setTemplateResolver(templateResolver()); templateEngine.setEnableSpringELCompiler(true); templateEngine.addDialect(new CustomDialect()); return templateEngine; } @Bean public ThymeleafViewResolver viewResolver() { ThymeleafViewResolver viewResolver = new ThymeleafViewResolver(); viewResolver.setTemplateEngine(templateEngine()); return viewResolver; } } 现在，你可以在Thymeleaf模板中使用自定义标签和属性了。例如：
<!DOCTYPE html> <html xmlns:custom="http://www.example.com/custom"> <head> <title>Custom Tag and Attribute Example</title> </head> <body> <custom:custom attributeName="value">Content</custom:custom> <div custom:customAttr="value">Content</div> </body> </html> 这样，当Thymeleaf解析到<custom:custom>标签或包含custom:customAttr属性的元素时，它会调用相应的处理器来处理这些元素。
