1.创建模板解析器 Create Template Resolver 用来加载模板
1 // create template resolver 2 //创建模板解析器可以用Servlet上下文模板解析器ServletContextTemplateResolver或者类加载模板解析器ClassLoaderTemplateResolver 3 4 ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver(); 5 ClassLoaderTemplateResolver templateResolver = new ClassLoaderTemplateResolver();
创建模板解析器将指定我们从Servlet上下文检索模板文件作为资源，并考虑应用程序的根路径作为资源的路径。如下：
1 // XHTML is the default mode, but we will set it anyway for better understanding of code 2 templateResolver.setTemplateMode(‘XHTML‘); 3 4 // This will convert "home" to "/WEB-INF/templates/home.html" 5 templateResolver.setPrefix(‘/WEB-INF/templates/‘); 6 templateResolver.setSuffix(‘.html‘);
如上所示，通过解析器创建模板节点，当使用Thymeleaf渲染名为“home”的模板的的时候，将，解析器将会自动加上前缀和后缀（扩展名）。
2.创建模板引擎 Create Template Engine
1 //Create Template Engine 2 TemplateEngine templateEngine = new TemplateEngine(); 3 templateEngine.setTemplateResolver(templateResolver); //设置模板解析器
创建模板引擎很简单，只需要一个模板解析器实例。创建了关键的模板解析器和模板引擎之后，我们就可以创建模板页面使用Thymeleaf。
3.创建模板文件
模板文件放在‘/WEB-INF/templates/‘路径下。要指定DOCTYPE和命名空间。
<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-4.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org">
<head>
<title>Hello thymeleaf</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<p>
<span th:text="#{home.welcome}">this is text will not be show</span>
</p>
</body>
</html>
模板文件中的th:text”属性的值是一个变量表达式，它将获取变量“hellword”的值作为<span>标签的文本显示到页面上。
4.创建模板上下文
为了输出变量“helloworld”的值，我们需要创建模板上下文，将变量输出到模板文件中。
//create servlet context WebContext ctx = new WebContext(req,resp,this.getServletContext(),req.getLocale()); ctx.setVariable(‘helloword‘,‘hello thymeleaf,wellcome!‘)
5.执行模板引擎
执行模板引擎需要传入模板名、上下文对象以及响应流。如下：
//Executing template engine templateEngine.process(‘home‘,ctx,resp.getWriter());
让我们看看执行模板引擎后的结果：
OK，如上所说，模板文件被替换成了标准的XHTML文件了。
最后的源码
public class thymeleafServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req,resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
//Create Template Resolver
ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver();
//ClassLoaderTemplateResolver templateResolver = new ClassLoaderTemplateResolver();
// XHTML is the default mode, but we will set it anyway for better understanding of code
templateResolver.setTemplateMode("XHTML");
// This will convert "home" to "/WEB-INF/templates/home.html"
templateResolver.setPrefix("/WEB-INF/templates/");
templateResolver.setSuffix(".html");
// Set template cache TTL to 1 hour. If not set, entries would live in cache until expelled by LRU
templateResolver.setCacheTTLMs(Long.valueOf(3600000L));
// Cache is set to true by default. Set to false if you want templates to
// be automatically updated when modified.
templateResolver.setCacheable(true);
//Create Template Engine
TemplateEngine templateEngine = new TemplateEngine();
templateEngine.setTemplateResolver(templateResolver);
//Write the response headers
resp.setContentType("text/html;charset=UTF-8");
resp.setHeader("Pragma", "no-cache");
resp.setHeader("Cache-Control", "no-cache");
resp.setDateHeader("Expires", 0);
//Create Servlet context
WebContext ctx = new WebContext(req, resp, this.getServletContext(), req.getLocale());
ctx.setVariable("helloword","hello thymeleaf,wellcome!");
//Executing template engine
templateEngine.process("home", ctx, resp.getWriter());
}
}
原文地址：http://www.mamicode.com/info-detail-1150559.html
时间： 2024-08-28 08:51:31