About the configuration and use of thymeleaf

 

  First

To configure a about thymeleaf I have a library here zip Compressed package , You can complete the corresponding configuration , If it's in idea If you guide the bag by yourself , Will report a mistake , And the compressed package is incomplete . Here is a website that has thymeleaf Description of https://heavy_code_industry.gitee.io/code_heavy_industry/pro001-javaweb/lecture/chapter08/verse03.html

After importing the package number , I'm going to build a new one servlet class , You can call it viewbaseservlet

The writing of the inside bag is ：

package Servlet;
​
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.WebContext;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.templateresolver.ServletContextTemplateResolver;
​
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
​
public  class ViewBaseServlet extends HttpServlet {
​
    private TemplateEngine templateEngine;
​
    @Override
    public void init() throws ServletException {
​
        // 1. obtain ServletContext object 
        ServletContext servletContext = this.getServletContext();
​
        // 2. establish Thymeleaf Parser object 
        ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver(servletContext);
​
        // 3. Set parameters to the parser object 
        // ①HTML It's the default mode , The explicit setting is to make the code easier to understand 
        templateResolver.setTemplateMode(TemplateMode.HTML);
​
        // ② Set prefix 
        String viewPrefix = servletContext.getInitParameter("view-prefix");
​
        templateResolver.setPrefix(viewPrefix);
​
        // ③ Set suffix 
        String viewSuffix = servletContext.getInitParameter("view-suffix");
​
        templateResolver.setSuffix(viewSuffix);
​
        // ④ Set cache expiration time （ millisecond ）
        templateResolver.setCacheTTLMs(60000L);
​
        // ⑤ Set whether to cache 
        templateResolver.setCacheable(true);
​
        // ⑥ Set the server-side encoding method 
        templateResolver.setCharacterEncoding("utf-8");
​
        // 4. Create template engine object 
        templateEngine = new TemplateEngine();
​
        // 5. Set the template parser for the template engine object 
        templateEngine.setTemplateResolver(templateResolver);
​
    }
​
    protected void processTemplate(String templateName, HttpServletRequest req, HttpServletResponse resp) throws IOException {
        // 1. Set the content type and character set of the response body 
        resp.setContentType("text/html;charset=UTF-8");
​
        // 2. establish WebContext object 
        WebContext webContext = new WebContext(req, resp, getServletContext());
​
        // 3. Process template data 
        templateEngine.process(templateName, webContext, resp.getWriter());
    }
}

Then build another servlet Class to inherit this class , Complete the request sent to the client

Be careful ：

Physical view = View prefix + Logical view + View suffix

<!--  Configure the view prefix and view suffix in the context parameters  -->
<context-param>
    <param-name>view-prefix</param-name>
    <param-value>/WEB-INF/view/</param-value>
</context-param>
<context-param>
    <param-name>view-suffix</param-name>
    <param-value>.html</param-value>
</context-param>

The method of the parent class can be called in the inherited subclass , Corresponding to relevant html Page resources of

stay doGet() Method to jump to Thymeleaf page

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
    // 1. Declare the name of the view to which the current request is going 
    String viewName = "target";
    
    // 2. call ViewBaseServlet Method of parsing view template in parent class 
    super.processTemplate(viewName, request, response);
    
}