java 列出 Thymeleaf 中所有可用的模型属性
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List all available model attributes in Thymeleaf
提问by David Lavender
For debugging purposes I would like to list allmodel attributes available to my thymeleaf template while it is rendering.
出于调试目的，我想列出渲染时我的 thymeleaf 模板可用的所有模型属性。
Something like:
就像是：
<table>
<tr th:each="model : ${*}">
<td th:text="${model}"></td>
</tr>
</table>
But obviously that's nonsense, and I get a well-deserved error.
(org.springframework.expression.spel.SpelParseException: EL1070E:(pos 0): Problem parsing left operand)
但显然这是无稽之谈，我得到了一个当之无愧的错误。( org.springframework.expression.spel.SpelParseException: EL1070E:(pos 0): Problem parsing left operand)
Is there a way of outputting such debug information? I'd settle even for some logging output.
有没有办法输出这样的调试信息？我什至会满足于一些日志输出。
Or, does Thymeleaf provide something similar to Struts 2's struts.devModewhere it added a debug section at the bottom of the page listing all available properties?
或者，Thymeleaf 是否提供了类似于 Struts 2 的东西struts.devMode，它在页面底部添加了一个调试部分，列出了所有可用的属性？
回答by the4dK
Try this:
试试这个：
<table>
<tr th:each="var : ${#vars}">
<td th:text="${var.key}"></td>
<td th:text="${var.value}"></td>
</tr>
</table>
回答by Roy Truelove
The accepted answer does not seem to work for Thymeleaf 3; here's an update. Please note that I'm using Spring; this might not work for non-Spring apps.
接受的答案似乎不适用于 Thymeleaf 3；这是一个更新。请注意，我使用的是 Spring；这可能不适用于非 Spring 应用程序。
<table>
<tr th:each="var : ${#vars.getVariableNames()}">
<td th:text="${var}"></td>
<td th:text="${#vars.getVariable(var)}"></td>
</tr>
<!-- Adding these manually because they're considered special.
see https://github.com/thymeleaf/thymeleaf/blob/thymeleaf-3.0.3.RELEASE/src/main/java/org/thymeleaf/context/WebEngineContext.java#L199
-->
<tr>
<td>param</td>
<td th:text="${#vars.getVariable('param')}"></td>
</tr>
<tr>
<td>session</td>
<td th:text="${#vars.getVariable('session')}"></td>
</tr>
<tr>
<td>application</td>
<td th:text="${#vars.getVariable('application')}"></td>
</tr>
</table>
That said, what I've done is created a standalone Bean that makes things a bit prettier and dumps to logs instead of to HTML:
也就是说，我所做的是创建了一个独立的 Bean，它使事情变得更漂亮并转储到日志而不是 HTML：
@Component
public class ThymeleafDumper {
private Logger log = LoggerFactory.getLogger(ThymeleafDumper.class);
public void dumpToLog(WebEngineContext ctx) {
log.debug("Thymeleaf context: {}", formatThisUpNicely(ctx));
}
// ... etc
}
Where formatThisUpNicelycan use ctx.getVariableNames(), put the results into a SortedMap, export to json, whatever. Don't forget those three 'special' variables!
哪里formatThisUpNicely可以用ctx.getVariableNames()，把结果放到一个SortedMap，导出到json，随便。不要忘记这三个“特殊”变量！
Then expose an instance of it as a @ModelAttributein a Controlleror a ControllerAdvice:
然后将它的一个实例公开为 a @ModelAttributein aController或 a ControllerAdvice：
@ControllerAdvice
public class SomeControllerAdvice {
@Autowired
private ThymeleafDumper thymeleafDumper;
@ModelAttribute("dumper")
public ThymeleafDumper dumper() {
return this.thymeleafDumper;
}
}
Then in my template run:
然后在我的模板中运行：
<div th:text="${dumper.dumpToLog(#vars)}"/>
回答by Hossein
these are all the logging available configurations :
这些是所有可用的日志记录配置：
log4j.logger.org.thymeleaf=DEBUG
log4j.logger.org.thymeleaf.TemplateEngine.CONFIG=DEBUG
log4j.logger.org.thymeleaf.TemplateEngine.TIMER=DEBUG
log4j.logger.org.thymeleaf.TemplateEngine.cache.TEMPLATE_CACHE=DEBUG
log4j.logger.org.thymeleaf.TemplateEngine.cache.FRAGMENT_CACHE=DEBUG
log4j.logger.org.thymeleaf.TemplateEngine.cache.MESSAGE_CACHE=DEBUG
log4j.logger.org.thymeleaf.TemplateEngine.cache.EXPRESSION_CACHE=DEBUG
these will log all the thymeleaf actions. I hope it is helpful.
这些将记录所有百里香叶操作。我希望它有帮助。
