我想尝试使用百里香去耦模板逻辑。这在thymeleaf 3.0 documentation中提到。
根据教程，我创建了我的项目here
我的模板和解耦逻辑位于LogicTemplate.html和LogicTemplate.th.xml文件中。
LogicTemplate.html的代码段如下：
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org">
<head>
<title>ThymeLeaf:Example03</title>
</head>
<body>
<table id="ProductTable">
<tr>
<td class="Name">Name</td>
<td class="Price">Price</td>
<td class="InStock">In Stock</td>
<td class="Comments">Comments</td>
</tr>
<tr>
<td class="Name">Ppap</td>
<td class="Price">10</td>
<td class="InStock">Yes</td>
<td class="Comments">No Comments</td>
</tr>
</table>
</body>
</html>4. LogicTemplate.th.xml的代码片段如下：
<?xml version="1.0"?>
<thlogic>
<attr sel="#ProductTable" th:remove="all-but-first">
<attr sel="/tr[0]" th:each="prod : ${products}">
<attr sel="td.Name" th:text="${prod.name}" />
<attr sel="td.Price" th:text="${prod.price}" />
<attr sel="td.InStock" th:text="${prod.inStock}" />
<attr sel="td.Comments" th:text="${${prod.comments!=null and (not #lists.isEmpty(prod.comments))}?#lists.size(prod.comments):0}}" />
</attr>
</attr>
</thlogic>5.我创建了以下Java类DeCoupledLogic，代码片段如下所示：
`
public class DeCoupledLogic {
public static void main(String[] args) {
final FileTemplateResolver templateResolverFile = new FileTemplateResolver();
templateResolverFile.setTemplateMode(TemplateMode.HTML);
templateResolverFile.setPrefix("src/main/resources/templates/html/");
templateResolverFile.setSuffix(".html");
templateResolverFile.setCacheTTLMs(1 * 60 * 60 * 1000l);
templateResolverFile.setCacheable(Boolean.TRUE);
templateResolverFile.setCharacterEncoding("UTF-8");
templateResolverFile.setCheckExistence(true);
templateResolverFile.setUseDecoupledLogic(true);
templateResolverFile.setCheckExistence(true);
final StandardDecoupledTemplateLogicResolver resolver=new StandardDecoupledTemplateLogicResolver();
resolver.setPrefix("src/main/resources/templates/html/");
final TemplateEngine templateEngine = new TemplateEngine();
templateEngine.setTemplateResolver(templateResolverFile);
templateEngine.setDecoupledTemplateLogicResolver(resolver);
final Context context01 = new Context();
context01.setVariable("products",ProductRepository.getInstance().findAll());
final BufferedWriter writer01=new BufferedWriter(new OutputStreamWriter(System.out));
templateEngine.process("LogicTemplate",context01,writer01);
}
}
`
但是执行此代码不会产生预期的结果。
实际输出：
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>ThymeLeaf:Example03</title>
</head>
<body>
<table id="ProductTable">
<tr>
<td class="Name">Name</td>
<td class="Price">Price</td>
<td class="InStock">In Stock</td>
<td class="Comments">Comments</td>
</tr>
<tr>
<td class="Name">Ppap</td>
<td class="Price">10</td>
<td class="InStock">Yes</td>
<td class="Comments">No Comments</td>
</tr>
</table>
</body>预期输出：
不得包含此静态文本，而应包含所有产品信息。但是我无法弄清楚该代码段出了什么问题。请帮助我确定代码中的潜在错误。
最佳答案
Thymeleaf默认情况下配置StandardDecoupledTemplateLogicResolver（您正在配置的看起来配置错误）。通过将其更改为以下内容，我可以使您的文件正常工作：
final FileTemplateResolver templateResolverFile = new FileTemplateResolver();
templateResolverFile.setTemplateMode(TemplateMode.HTML);
templateResolverFile.setPrefix("src/main/resources/templates/html/");
templateResolverFile.setSuffix(".html");
templateResolverFile.setCacheTTLMs(1 * 60 * 60 * 1000l);
templateResolverFile.setCacheable(Boolean.TRUE);
templateResolverFile.setCharacterEncoding("UTF-8");
templateResolverFile.setCheckExistence(true);
templateResolverFile.setUseDecoupledLogic(true);
templateResolverFile.setCheckExistence(true);
final TemplateEngine templateEngine = new TemplateEngine();
templateEngine.setTemplateResolver(templateResolverFile);
final Context context01 = new Context();
context01.setVariable("products",ProductRepository.getInstance().findAll());
final BufferedWriter writer01=new BufferedWriter(new OutputStreamWriter(System.out));
templateEngine.process("LogicTemplate",context01,writer01);
另外，您的逻辑xml中有一些错别字，看起来应该像这样：
<?xml version="1.0"?>
<thlogic>
<attr sel="#ProductTable" th:remove="all-but-first">
<attr sel="/tr[0]" th:each="prod : ${products}">
<attr sel="td.Name" th:text="${prod.name}" />
<attr sel="td.Price" th:text="${prod.price}" />
<attr sel="td.InStock" th:text="${prod.inStock}" />
<attr sel="td.Comments" th:text="${prod.comments != null and (not #lists.isEmpty(prod.comments)) ? #lists.size(prod.comments) : 0}" />
</attr>
</attr>
</thlogic>