此篇文章內容僅限于 描述 thy3.0 自定義標簽的說明，所以你在看之前，請先會使用它。
直奔主題，以下代碼是如何引用 第三方標簽的。說明： shrioDialect 是Shiro 官方為thy開發的自定義標簽工具。和jsp的一樣
RiskDialect 是我寫的自定義標簽
|
1
2
3
4
5
6
7
8
9
10
|
<bean id="templateEngine" class="org.thymeleaf.spring3.SpringTemplateEngine"> <property name="templateResolver" ref="templateResolver"/> <property name="additionalDialects"> <set> <!-- thymeleaf 使用shiro標簽 --> <bean class="at.pollux.thymeleaf.shiro.dialect.ShiroDialect"/> <bean class="com.hpay.risk.boss.common.RiskDialect"/> </set> </property></bean> |
首先看代碼：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
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 自定義標簽屬性 *@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; } } |
我定義了 RiskDialect 類，并需要繼承 thymeleaf 官方 方言類
我定義的這個是為了做敏感數據加密用的。 這是前段代碼。
以下是實現自定義標簽方言 代碼：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
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 敏感加密標簽 *@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, // 處理thymeleaf 的模型 dialectPrefix, // 標簽前綴名 null, // No tag name: match any tag name false, // No prefix to be applied to tag name ATTRIBUTE_NAME, // 標簽前綴的 屬性 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); //獲取標簽內容表達式 String type=null; String exper=null; if(StringUtils.isNotBlank(rawValue)){ type=rawValue.split(":")[0]; //獲取類型 exper=rawValue.split(":")[1]; //獲取表達式 } //通過IStandardExpression 解析器 解析表達式獲取參數 final List<String> values = evaluateAsStringsWithDelimiter(context, exper, DELIMITER); //創建模型 final IModelFactory modelFactory = context.getModelFactory(); final IModel model = modelFactory.createModel(); //添加模型 標簽 model.add(modelFactory.createOpenElementTag(elementCompleteName)); for (String value : values) { //創建 html5標簽 文本返回數據 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 標簽 model.add(modelFactory.createCloseElementTag(elementCompleteName)); //替換頁面標簽 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()); } } /** * 前四后四顯示 * @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()); } } /** * 星星顯示 * @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()); } }} |
以下代碼是為了向SansitiveEncryptProcessor 提供的解析表達式 thymeleaf解析器，用來獲取參數值的：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
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); } |
以上為 后端代碼實現內容，
頁面標簽使用方式：
<td risk:sansiEncrypt="card:${data.payerCardNo}"></td>
card 是需要 加密的類型，我實現的代碼里 對身份證和 手機號還有 CSN 加了密。
上面的內容講的是 標簽傳入數據 并返回處理數據。
類似于 if 的標簽屬性，就不寫了。
以上這篇Thymeleaf 3.0 自定義標簽方言屬性的實例講解就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/Qensq/article/details/55258104
