【freemarker】maven web项目freemarker demo搭建

 

注（freemarker中文网）：http://freemarker.foofun.cn/

 

1 构建maven web项目

略

2 引入freemarker依赖 pom.xml

 

 <!-- https://mvnrepository.com/artifact/org.freemarker/freemarker -->
  <dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>2.3.23</version>
  </dependency>

  <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
    <scope>provided</scope>
  </dependency>
</dependencies>

3 引入jeety插件 pom.xml


<plugin>
  <groupId>org.eclipse.jetty</groupId>
  <artifactId>jetty-maven-plugin</artifactId>
  <version>9.2.1.v20140609</version>
</plugin>

4 创建ftl文件 路径在webapp/temp下






<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>新闻内容</title>
</head>
<body>

<h1>${titel}</h1>
<p>
    新闻来源：${source}&nbsp; &nbsp; 发布时间: ${publishTime?string("yyyy-MM-dd")}
</p>
<p>
    ${content}
</p>
</body>
</html>



5 创建java文件继承 HttpServlet






import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

@WebServlet("/news")
public class newsServlet extends HttpServlet {
   @Override
   protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

       // 得到模板
       Configuration configuration = new Configuration();
       configuration.setServletContextForTemplateLoading(getServletContext(),"/temp");
       configuration.setDefaultEncoding("UTF-8");
       Template template = configuration.getTemplate("news.ftl");


       Map<String, Object> map = new HashMap<>();
       map.put("source","中国知识网");
       map.put("titel","小帅锅诞生");
       map.put("publishTime",new Date());
       map.put("content","在最佳情况下，你不需要使用这些内建函数");

       // 生成html文件
      String realPath = req.getServletContext().getRealPath("/html/");
      File newsFile = new File(realPath);
      if (newsFile.exists()) {
          newsFile.mkdir();
      }
       // set name
      String fileName = System.currentTimeMillis() + ".html";
      File  file = new File(realPath,fileName);
      //
       FileWriter writer = new FileWriter(file);
       try {
           template.process(map, writer);
       } catch (TemplateException e) {
           e.printStackTrace();
       }
   }
}

6 启动项目访问





http://localhost:8080/html/1621158840763.html
备注：1621158840763.html 文件java代码生成的文件











            

            
posted @ 
2021-05-16 21:17 
RonnieChen 
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