通过ajax/servlet将数据库数据显示在页面上

最新推荐文章于 2025-03-16 10:00:00 发布

野有蔓兮

最新推荐文章于 2025-03-16 10:00:00 发布

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分类专栏： java 文章标签： servlet ajax

本文链接：https://blog.youkuaiyun.com/weixin_41104835/article/details/100553628

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本文介绍如何结合Ajax与Servlet技术，实现在网页上动态获取并展示数据库中的信息。详细步骤包括配置web.xml，编写GetAllDesignReportServlet，设计DesignReportDAO接口，创建html页面，最终展示数据的返回结果。

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通过ajax/servlet将数据库数据显示在页面上

数据库信息
web.xml

 <servlet>
 	<description>This is the description of my J2EE component</description>
   <display-name>This is the display name of my J2EE component</display-name>
   <servlet-name>GetAllDesignReportServlet</servlet-name>
   <servlet-class>SERVLET.GetAllDesignReportServlet</servlet-class>
 </servlet>
 <servlet-mapping>
   <servlet-name>GetAllDesignReportServlet</servlet-name>
   <url-pattern>/GetAllDesignReportServlet.do</url-pattern>
 </servlet-mapping>

GetAllDesignReportServlet

package SERVLET;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.json.JSONException;
import org.json.JSONObject;

import DAO.DesignReportDAO;

public class GetAllDesignReportServlet extends HttpServlet {

   public void doGet(HttpServletRequest request, HttpServletResponse response)
   		throws ServletException, IOException {
   }


   public void doPost(HttpServletRequest request, HttpServletResponse response)
   		throws ServletException, IOException {
   	   request.setCharacterEncoding("utf-8");
   	   DesignReportDAO dao=new DesignReportDAO();
   	   ArrayList<JSONObject> array = null;
   	try {
   		array = dao.select_all();
   	} catch (JSONException e) {
   		// TODO Auto-generated catch block
   		e.printStackTrace();
   	}
   	     response.setContentType("text/html;charset=utf-8");
   	     PrintWriter pw = response.getWriter();	
   	     pw.print(array.toString());
   	
   }

}

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