helloservlet.java

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package servlets;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.RequestDispatcher;
import java.sql.Connection;
import java.sql.Statement;
//import java.sql.DriverManager;
import java.sql.ResultSet;
//import java.sql.SQLException;

import java.util.*;

public class HelloServlet extends HttpServlet
{

	public void service(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
	{
		String process = request.getParameter("process");
		String nextPage = request.getParameter("nextPage");
		String beanName = request.getParameter("beanName");
		HttpSession session=request.getSession();
		HashMap resultMap = new HashMap();
		try
		{
			TestInter testBean = (TestInter)Class.forName(beanName).newInstance();
			
			if(process != null && process.equals("query"))
			{
				resultMap = testBean.findListData(request);
				session.setAttribute("result",resultMap);
			}
			else if(process != null && (process.equals("queryInsert") || process.equals("queryUpdate") || process.equals("queryDelete")))
			{
				resultMap = testBean.findOneData(request);
				request.setAttribute("result",resultMap);
			}
			
			else if(process != null && process.equals("insert"))
			{
				resultMap = testBean.insertData(request);
				request.setAttribute("result",resultMap);
			}
			
			else if(process != null && process.equals("update"))
			{
				resultMap = testBean.updateData(request);
				request.setAttribute("result",resultMap);
			}

			else if(process != null && process.equals("delete"))
			{
				resultMap = testBean.deleteData(request);
				request.setAttribute("result",resultMap);
			}
			else if(process !=null && process.equals("list_query"))
			{
				resultMap=testBean.findListData(request);
				request.setAttribute("result",resultMap);
				
			}
			
		}
		catch(Exception e)
		{
			System.out.println("出现如下异常：" + e.getMessage());
		}		
		//request.setAttribute("name",name);

		RequestDispatcher b=request.getRequestDispatcher(nextPage);
		b.forward(request,response);
		
	}
}