check4.java

比较简单学生查询系统

package com.fi;

import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class Check4 extends HttpServlet {
	public void doGet(HttpServletRequest req, HttpServletResponse res)
			throws ServletException, IOException {
		doPost(req, res);

	}

	public void doPost(HttpServletRequest req, HttpServletResponse res)
			throws ServletException, IOException {
		res.setCharacterEncoding("UTF-8");
		String username = null;
		String password = null;
		int j;
		HttpSession session = req.getSession(true);
		username=(String)session.getAttribute("name");
		password = req.getParameter("password1").trim();
		// res.getWriter().print("password"+password);
		sqlBean db = new sqlBean();
		String sql = "update userinfo set password='"+password+"'where username='"
			+ username + "'";
		j=db.executeInsert(sql);
		if(j!=0){
			RequestDispatcher rd = getServletContext().getRequestDispatcher(
					"/ok.html");
			rd.forward(req, res);
		} else {
			res.getWriter().println("密码修改失败！");
		}
	}

}