useroperservlet.java

java+oracle 完成通讯录的增删改查

package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import bean.UserBean;


import db.OracleConn;

public class UserOperServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String address = "/fail.jsp";
		String username = request.getParameter("name");
		String userpwd = request.getParameter("pwd");		
		String SQL = "select * from Operater where Operator_Name='"+username+"' and userpwd='"+userpwd+"'";
		Connection conn = null;
		PreparedStatement stmt = null;
		ResultSet rs = null;
		
		UserBean user = new UserBean();
		conn = OracleConn.getConnection();
		try {
			stmt = conn.prepareStatement(SQL);
			rs = stmt.executeQuery();
			if (rs.next()&&rs!=null){
				HttpSession session = request.getSession();
				session.setAttribute("username", username);	
				address = "main.jsp";
			}	
		} catch (SQLException e) {

			e.printStackTrace();
		}
		OracleConn.closeResultSet(rs);
		OracleConn.closeConnection(conn);
		RequestDispatcher dis = request.getRequestDispatcher(address);
		dis.forward(request, response);
		
		
	}

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

		doGet(request, response);
	}

}