如何在 thymeleaf 中建立绝对 URL? [英] How can you build an absolute URL in thymeleaf?

问题描述

我想显示一个在运行时生成的带有参数的绝对 url.不创建页面的 href 而是使用 th:text 显示 URL.使用 Tymeleaf 执行此操作的任何简单方法(无需连接来自 #request 对象的 URL 片段，也无需使用某些 MVC 实用程序类)?

I would like to display an absolute url generated at run-time with a parameter. Not create a href to a page but display the URL using th:text. Any simple way to do this with Tymeleaf (without having to concatenate the URL pieces from #request object and without using some MVC utility class)?

尝试 1

<p th:text="@{/myServlet(myParam=${dynamicParameter})}"/> - 只显示部分 URL，不包括协议、端口和主机姓名.我收到 /myServlet?myParam=123.与 th:href 的行为相同，如果您检查 <a>，您将看到相同的 href - 在这种情况下，浏览器会通过推断协议、端口来提供帮助等等

<p th:text="@{/myServlet(myParam=${dynamicParameter})}" /> - only displays part of the URL leaving out the protocol, port and host name. I am getting /myServlet?myParam=123. The same behavior as for th:href, if you inspect the <a> you will see the same href - in that case the browser helps by inferring the protocol, port and so on

尝试 2

th:text="@{__${#httpServletRequest.requestURI}__}" - 生成不包含协议等的当前页面的相对 URI

th:text="@{__${#httpServletRequest.requestURI}__}" - produces a relative URI of the current page that doesn't include the protocol and so on

尝试 3

th:text="@{__${#httpServletRequest.requestURL}__}" - 这次生成包含协议、主机和 servlet 上下文的当前页面的绝对 URL.现在的问题是，当我从不同的页面显示此文本时，我的 URL 是 ...myApp/myOtherServlet，因此我需要编辑此字符串以将 myOtherServlet 替换为 URI我想要.

th:text="@{__${#httpServletRequest.requestURL}__}" - produces this time an absolute URL of the current page containing the protocol, host and servlet context. The problem now is when I display this text from a different page, my URL is ...myApp/myOtherServlet so I need to edit this string to replace myOtherServlet with the URI I want.

非 Tymeleaf 尝试 1

@Service("urlUtils")
public class UrlUtilsServiceImpl implements UrlUtilsService {
@Override
    public String getAbsoluteUrlTo(final String aPath, final String param, final String value){
        return ServletUriComponentsBuilder
                .fromCurrentContextPath()
                .path(aPath)
                .queryParam(param, value)
                .build().toString();
    }
}

page.html:

th:text="${@urlUtils.getAbsoluteUrlTo('/myServlet', 'myParam', ${dynamicParameter})}"

问题是主机名在到达我的服务器之前可以使用别名(参见 这个).Thymeleaf+JS 溶液

The problem is the host name that can be aliased before it reaches my server (see this). Thymeleaf+JS Sollution

使用一些java脚本加上thymeleaf

Using some java script plus thymeleaf

<p id="myUrl" th:text="@{/myServlet(myParam=${dynamicParameter})}" />
<script type="text/javascript">
    $(document).ready(function () {
        var myUrl= $("#myUrl");
        myUrl.text(window.location.origin + myUrl.text());
        });
</script>

推荐答案

您可以即时连接 servlet 请求:

You can concatenate servlet request on the fly:

th:text="${#httpServletRequest.scheme}+'://'+${#httpServletRequest.serverName}+':'+${#httpServletRequest.serverPort}+@{/myServlet(myParam=${dynamicParameter})}"

或者对于 JavaScript:

Or for JavaScript:

<script type="text/javascript">
    GLOBAL.serverURI = '[[${#httpServletRequest.scheme}+'://'+${#httpServletRequest.serverName}+':'+${#httpServletRequest.serverPort}+@{/myServlet(myParam=${dynamicParameter})}]]';
</script>

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