Freemarker与Servlet

1.导入jar包（freemarker.jar）

2.web.xml配置一个普通servlet

<servlet>
<servlet-name>hello</servlet-name>
<servlet-class>example.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>hello</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>

3.建立一个模板文件WEB-INF/templates/test.ftl

<html>
<head>
<title>FreeMarker Example Web Application</title>
</head>
<body>
<h3 style="color:red">${message}</h3>
</body>
</html>

4.Servlet控制器HelloServlet.java

package example;

import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import freemarker.template.*;

/**
* This Servlet does not do anything useful, just prints "Hello World!". The
* intent is to help you to get started if you want to build your own Controller
* servlet that uses FreeMarker for the View. For more advanced example, see the
* 2nd Web application example.
*/
public class HelloServlet extends HttpServlet {
private Configuration cfg; 

public void init() {
// Initialize the FreeMarker configuration;
// - Create a configuration instance
cfg = new Configuration();
// - Templates are stoted in the WEB-INF/templates directory of the Web app.
cfg.setServletContextForTemplateLoading(
getServletContext(), "WEB-INF/templates");
// In a real-world application various other settings should be explicitly
// set here, but for the sake of brevity we leave it out now. See the
// "webapp2" example for them.
}

protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {

// Build the data-model
Map root = new HashMap();
root.put("message", "测试Hello World!");

// Get the templat object
Template t = cfg.getTemplate("test.ftl");

// Prepare the HTTP response:
// - Use the charset of template for the output
// - Use text/html MIME-type
resp.setContentType("text/html; charset=" + t.getEncoding());
Writer out = resp.getWriter();

// Merge the data-model and the template
try {
t.process(root, out);
} catch (TemplateException e) {
throw new ServletException(
"Error while processing FreeMarker template", e);
}
}
}

posted on 2016-05-16 09:58 wzyy 阅读(410) 评论(0) 编辑收藏举报

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Freemarker与Servlet