此篇文章内容仅限于 描述 thy3.0 自定义标签的说明，所以你在看之前，请先会使用它。

直奔主题，以下代码是如何引用 第三方标签的。说明： shrioDialect 是Shiro 官方为thy开发的自定义标签工具。和jsp的一样

RiskDialect 是我写的自定义标签

<bean id="templateEngine" class="org.thymeleaf.spring3.SpringTemplateEngine"> <property name="templateResolver" ref="templateResolver"/> <property name="additionalDialects"> <set> <!-- thymeleaf 使用shiro标签 --> <bean class="at.pollux.thymeleaf.shiro.dialect.ShiroDialect"/> <bean class="com.hpay.risk.boss.common.RiskDialect"/> </set> </property> </bean>

首先看代码：

import java.util.LinkedHashSet;import java.util.Set; import org.thymeleaf.dialect.AbstractProcessorDialect;import org.thymeleaf.processor.IProcessor;import org.thymeleaf.standard.StandardDialect; /** *@author Garc *@Date 2017年2月16日 上午11:42:51 *@info thymeleaf 自定义标签属性 *@snise **/public class RiskDialect extends AbstractProcessorDialect { private static final String NAME = "Risk"; private static final String PREFIX = "risk"; public RiskDialect() { super(NAME, PREFIX, StandardDialect.PROCESSOR_PRECEDENCE); } @Override public Set<IProcessor> getProcessors(String dialectPrefix) { return createStandardProcessorsSet(dialectPrefix); } private Set<IProcessor> createStandardProcessorsSet(String dialectPrefix) { LinkedHashSet<IProcessor> processors = new LinkedHashSet<IProcessor>(); processors.add(new SansitiveEncryptProcessor(dialectPrefix)); return processors; } }

我定义了 RiskDialect 类，并需要继承 thymeleaf 官方 方言类

我定义的这个是为了做敏感数据加密用的。 这是前段代码。

以下是实现自定义标签方言 代码：

import static at.pollux.thymeleaf.shiro.processor.ThymeleafFacade.evaluateAsStringsWithDelimiter;import static at.pollux.thymeleaf.shiro.processor.ThymeleafFacade.getRawValue; import java.util.List; import org.thymeleaf.context.ITemplateContext;import org.thymeleaf.engine.AttributeName;import org.thymeleaf.model.IModel;import org.thymeleaf.model.IModelFactory;import org.thymeleaf.model.IProcessableElementTag;import org.thymeleaf.processor.element.AbstractAttributeTagProcessor;import org.thymeleaf.processor.element.IElementTagStructureHandler;import org.thymeleaf.templatemode.TemplateMode;import org.unbescape.html.HtmlEscape; import com.hpay.utils.StringUtils; /** *@author Garc *@Date 2017年2月16日 上午11:48:34 *@info 敏感加密标签 *@snise **/public class SansitiveEncryptProcessor extends AbstractAttributeTagProcessor{ private static final String DELIMITER = ","; private static final String ATTRIBUTE_NAME = "sansiEncrypt"; private static final int PRECEDENCE = 300; private static final String CARD="card"; private static final String MOBILE="mobile"; private static final String IDENTITY="identity"; private static final String CSN="csn"; protected SansitiveEncryptProcessor( String dialectPrefix) { super( TemplateMode.HTML, // 处理thymeleaf 的模型 dialectPrefix, // 标签前缀名 null, // No tag name: match any tag name false, // No prefix to be applied to tag name ATTRIBUTE_NAME, // 标签前缀的 属性 例如：< risk:sansiEncrypt=""> true, // Apply dialect prefix to attribute name PRECEDENCE, // Precedence (inside dialect's precedence) true); // Remove the matched attribute afterwards } @Override protected void doProcess(ITemplateContext context, IProcessableElementTag tag, AttributeName attributeName, String attributeValue, IElementTagStructureHandler structureHandler) { final String rawValue = getRawValue(tag, attributeName); //获取标签内容表达式 String type=null; String exper=null; if(StringUtils.isNotBlank(rawValue)){ type=rawValue.split(":")[0]; //获取类型 exper=rawValue.split(":")[1]; //获取表达式 } //通过IStandardExpression 解析器 解析表达式获取参数 final List<String> values = evaluateAsStringsWithDelimiter(context, exper, DELIMITER); final String elementCompleteName = tag.getElementCompleteName(); //标签名 //创建模型 final IModelFactory modelFactory = context.getModelFactory(); final IModel model = modelFactory.createModel(); //添加模型 标签 model.add(modelFactory.createOpenElementTag(elementCompleteName)); for (String value : values) { //创建 html5标签 文本返回数据 if(CARD.equals(type)){ model.add(modelFactory.createText(HtmlEscape.escapeHtml5(getCardNo(value)))); }else if(MOBILE.equals(type)){ model.add(modelFactory.createText(HtmlEscape.escapeHtml5(getMobile(value)))); }else if(IDENTITY.equals(type)){ model.add(modelFactory.createText(HtmlEscape.escapeHtml5(getIdentity(value)))); }else if(CSN.equals(type)){ model.add(modelFactory.createText(HtmlEscape.escapeHtml5(getCsn(value)))); } } //添加模型 标签 model.add(modelFactory.createCloseElementTag(elementCompleteName)); //替换页面标签 structureHandler.replaceWith(model, false); } protected String getCardNo(String cardNo) { if (StringUtils.isNotBlank(cardNo) && cardNo.length() >= 9) { return cardNo.substring(0, 4) + cardNo.substring(4, cardNo.length() - 3).replaceAll("[0-9]", "*") + cardNo.substring(cardNo.length() - 4, cardNo.length()); } return cardNo; } protected static String getIdentity(String val){ if(org.apache.commons.lang.StringUtils.isBlank(val)||val.length()<9){ return val; }else{ return val.substring(0, 4)+ val.substring(4, val.length()-4).replaceAll("[0-9]", "*") + val.substring(val.length()-4, val.length()); } } /** * 前四后四显示 * @param val * @return */ protected static String getMobile(String val){ if(org.apache.commons.lang.StringUtils.isBlank(val)||val.length()<9){ return val; }else{ return val.substring(0, 3)+ val.substring(4, val.length()-3).replaceAll("[0-9]", "*") + val.substring(val.length()-4, val.length()); } } /** * 星星显示 * @param val * @return */ protected String getCsn(String val){ if(org.apache.commons.lang.StringUtils.isBlank(val)||val.length()<12){ return val; }else{ return val.substring(0, 2)+ val.substring(2, val.length()-3).replaceAll("[0-9a-zA-Z]", "*") + val.substring(val.length()-6, val.length()); } }}

以下代码是为了向SansitiveEncryptProcessor 提供的解析表达式 thymeleaf解析器，用来获取参数值的：

import org.thymeleaf.context.ITemplateContext;import org.thymeleaf.engine.AttributeName;import org.thymeleaf.exceptions.TemplateProcessingException;import org.thymeleaf.model.IProcessableElementTag;import org.thymeleaf.standard.expression.IStandardExpression;import org.thymeleaf.standard.expression.IStandardExpressionParser;import org.thymeleaf.standard.expression.StandardExpressionParser;import org.thymeleaf.util.EvaluationUtils;import org.thymeleaf.util.StringUtils; import java.util.ArrayList;import java.util.List; import static java.util.Arrays.asList;import static java.util.Collections.unmodifiableList;import static org.thymeleaf.util.StringUtils.trim;import static org.thymeleaf.util.Validate.notEmpty;import static org.thymeleaf.util.Validate.notNull; public final class ThymeleafFacade { private ThymeleafFacade() { throw new UnsupportedOperationException(); } public static String getRawValue(final IProcessableElementTag element, final AttributeName attributeName) { notNull(element, "element must not be null"); notNull(attributeName, "attributeName must not be empty"); final String rawValue = trim(element.getAttributeValue(attributeName)); notEmpty(rawValue, "value of '" + attributeName + "' must not be empty"); return rawValue; } public static String getRawValue(final IProcessableElementTag element, final String attributeName) { notNull(element, "element must not be null"); notEmpty(attributeName, "attributeName must not be empty"); final String rawValue = trim(element.getAttributeValue(attributeName)); notEmpty(rawValue, "value of '" + attributeName + "' must not be empty"); return rawValue; } public static Object evaluateExpression(ITemplateContext arguments, String expression) throws TemplateProcessingException { notNull(arguments, "arguments must not be null"); notEmpty(expression, "expression must not be empty"); final IStandardExpressionParser parser = new StandardExpressionParser(); final IStandardExpression evaluableExpression = parser.parseExpression(arguments, expression); return evaluableExpression.execute(arguments); } public static List<Object> evaluateAsIterable(ITemplateContext arguments, String rawValue) throws TemplateProcessingException { notNull(arguments, "arguments must not be null"); notEmpty(rawValue, "rawValue must not be empty"); final Object evaluatedExpression = evaluateExpression(arguments, rawValue); return EvaluationUtils.evaluateAsList(evaluatedExpression); } public static List<Object> evaluateAsIterableOrRawValue(ITemplateContext arguments, String rawValue) { notNull(arguments, "arguments must not be null"); notEmpty(rawValue, "rawValue must not be empty"); final List<Object> result = new ArrayList<Object>(); try { result.addAll(evaluateAsIterable(arguments, rawValue)); } catch (TemplateProcessingException ex) { result.add(rawValue); } return unmodifiableList(result); } public static List<String> evaluateAsStringsWithDelimiter(ITemplateContext arguments, String rawValue, String delimiter) { notNull(arguments, "arguments must not be null"); notEmpty(rawValue, "rawValue must not be empty"); notEmpty(delimiter, "delimiter must not be empty"); final List<String> result = new ArrayList<String>(); final List<Object> iterates = evaluateAsIterableOrRawValue(arguments, rawValue); for (Object o : iterates) { result.addAll(asList(StringUtils.split(o, delimiter))); } return unmodifiableList(result); }

以上为 后端代码实现内容，

页面标签使用方式：

<td risk:sansiEncrypt="card:${data.payerCardNo}"></td>

card 是需要 加密的类型，我实现的代码里 对身份证和 手机号还有 CSN 加了密。

上面的内容讲的是 标签传入数据 并返回处理数据。

类似于 if 的标签属性，就不写了。

以上这篇Thymeleaf 3.0 自定义标签方言属性的实例讲解就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。