src/com/servlet/banji_servlet.java

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package com.servlet;

import java.io.IOException;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

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

import com.dao.DB;
import com.orm.Tbanji;

public class banji_servlet extends HttpServlet
{
	public void service(HttpServletRequest req,HttpServletResponse res)throws ServletException, IOException 
	{
        String type=req.getParameter("type");
		
        if(type.endsWith("banjiAdd"))
		{
			banjiAdd(req, res);
		}
        if(type.endsWith("banjiMana"))
		{
			banjiMana(req, res);
		}
		if(type.endsWith("banjiDel"))
		{
			banjiDel(req, res);
		}
		if(type.endsWith("banjiAll"))
		{
			banjiAll(req, res);
		}
	}
	
	
	public void banjiAdd(HttpServletRequest req,HttpServletResponse res)
	{
		String mingcheng=req.getParameter("mingcheng");
		String del="no";
		
		String sql="insert into t_banji(mingcheng,del) values(?,?)";
		Object[] params={mingcheng,del};
		DB mydb=new DB();
		mydb.doPstm(sql, params);
		mydb.closed();
		
		req.setAttribute("msg", "班级信息添加成功");
        String targetURL = "/common/msg.jsp";
		dispatch(targetURL, req, res);
	}
	
	public void banjiMana(HttpServletRequest req,HttpServletResponse res) throws ServletException, IOException
	{