201912G05/src/helloLine/helloLine.java

package helloLine;

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 net.sf.json.JSONArray;


public class helloLine extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public helloLine() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
        lineDAO linedao=new lineDAO();
        ArrayList<lineBean> array = (ArrayList<lineBean>) linedao.listAll();
        System.out.println("s"+array);
        response.setContentType("text/html; charset=utf-8");
        JSONArray json=JSONArray.fromObject(array);
        System.out.println(json.toString());
        PrintWriter out = response.getWriter();  
        out.println(json);  
        out.flush();  
        out.close();
        
//        lineDAO2 linedao2=new lineDAO2();
//        ArrayList<lineBean> array2 = (ArrayList<lineBean>) linedao2.listAll();
//        System.out.println("s"+array2);
//        response.setContentType("text/html; charset=utf-8");
//        JSONArray json2=JSONArray.fromObject(array2);
//        System.out.println(json2.toString());
//        PrintWriter out2 = response.getWriter();  
//        out2.println(json2);  
//        out2.flush();  
//        out2.close();
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
	}

}