bookcomments.java

用最近的dojo1.2.1制作前端的ajax购书网站

package server.servlet;

import java.io.IOException;
import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.*;
import comment.*;
/**
 * @version 	1.0
 * @author
 */
public class BookComments extends HttpServlet {

	/**
	* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	*/
	
	comment cm=new comment();
private ArrayList readData(HttpServletRequest req,ArrayList data)
	{
			ArrayList array=new ArrayList();
			Map map=req.getParameterMap();
			
			for(int i=0;i<data.size();i++)
			array.add(((String[])map.get(data.get(i)))[0]);
			 
			return array;
	}
	
	private ArrayList readInstantPage(HttpServletRequest req)
	{	ArrayList comments=new ArrayList();
		ArrayList data=new ArrayList();
		data.add("page");
		data.add("book_id");
		ArrayList result=readData(req,data);
	 
		String temp=result.get(0).toString();
	 
		int temp1=Integer.parseInt(temp);
		comments=cm.readComment(result.get(1).toString(),temp1);
		
		return comments;
	}
		
	public StringBuffer returnComments(HttpServletRequest req)//把书的信息存入objt
	{
		ArrayList comments=readInstantPage(req);
		commentData cd=new commentData();
	 String property[]=commentData.getPropety();
	StringBuffer va=new StringBuffer("[");
	comment cmt=new comment();
	if(comments.size()==0)
	va.append("{wholeresult :\"").append(0).append("\"}");
	else
{	cmt=(comment)comments.get(0);
	va.append("{wholeresult :\"").append(cmt.getSize(cmt.getBookid())).append("\"},");}
	
	for(int i=0;i<comments.size();i++)
	{	va.append("{");
		cmt=(comment)comments.get(i);
		va.append(property[0]).append(": \"").append(cmt.getBookid()).append("\",");
		va.append(property[1]).append(": \"").append(cmt.getIp()).append("\",");
		va.append(property[2]).append(": \"").append(cmt.getDatetime()).append("\",");
		if(i==comments.size()-1)
		va.append(property[3]).append(": \"").append(cmt.getInstanttime()).append("\"}");
		else
		va.append(property[3]).append(": \"").append(cmt.getInstanttime()).append("\"},");
	
		
	
		
	}
	
	va.append("]");
	
	comments.clear();
		return va;
	
	}
	
	
	public void doGet(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
			
			
		resp.getWriter().print(returnComments(req));
			

	}

	/**
	* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	*/
	public void doPost(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
				
		 
doGet(req,resp);
	}

	/**
	* @see javax.servlet.GenericServlet#void ()
	*/
	public void init() throws ServletException {
	 
		super.init();

	}

}