数据库连接测试：学生信息系统界面

连接数据库 DBUtil.java

package Student;

import java.sql.Connection;
import java.sql.DriverManager;

public class DBUtil {

public static String db_url = "jdbc:mysql://localhost:3306/student?characterEncoding=utf8";
public static String db_user = "root";
public static String db_pass = "密码";

public static Connection getConn () {
Connection conn = null;

  try {
   Class.forName("com.mysql.jdbc.Driver");
   conn = DriverManager.getConnection(db_url, db_user, db_pass);
  } catch (Exception e) {
   e.printStackTrace();
  }

return conn;
}
}

StudentOperate.java

package Student;

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

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import Student.DBUtil;

/**
* Servlet implementation class StudentOperate
*/
@WebServlet("/operate")
public class StudentOperate extends HttpServlet {
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // TODO Auto-generated method stub
  super.service(request, response);
  String method=request.getParameter("method");
  if(method.equals("register"))
  {
   register(request,response);
   //   response.getWriter().append("okkk").append(request.getContextPath());
  }
  if(method.equals("add"))
  {
   add(request,response);
   //   response.getWriter().append("okkk").append(request.getContextPath());
  }
}

private void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  request.setCharacterEncoding("utf-8");
  String name=request.getParameter("name");
//  String num=request.getParameter("num");
  name=new String(name.getBytes("ISO-8859-1"),"UTF-8");//服务器默认使用 ISO-8859-1 编码接受参数，手动转为UTF-8
  String english=request.getParameter("english");
  String math=request.getParameter("math");
  String computer=request.getParameter("computer");
  Connection con = DBUtil.getConn();
  PreparedStatement stmt=null;
  String sql = "insert into student(name,english,math,computer)values(?,?,?,?)";
  try {
   stmt = con.prepareStatement(sql);
   stmt.setString(1,name);
   stmt.setString(2,english);
   stmt.setString(3,math);
   stmt.setString(4,computer);
   //stmt.execute();
   int i=stmt.executeUpdate();
   if(i==1) {
    request.setAttribute("message", "添加成功！");
    request.getRequestDispatcher("add.jsp").forward(request,response);
   }
   else
   {
    request.setAttribute("message", "添加失败！");
    request.getRequestDispatcher("add.jsp").forward(request,response);
   }
   stmt.close();
   con.close();
  } catch (SQLException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

}

private void register(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  request.setCharacterEncoding("utf-8");
  String account=request.getParameter("account");
  account=new String(account.getBytes("ISO-8859-1"),"UTF-8");

  String code=request.getParameter("code");

  String sex=request.getParameter("sex");
  sex=new String(sex.getBytes("ISO-8859-1"),"UTF-8");

  String name=request.getParameter("name");
//  String num=request.getParameter("num");
  name=new String(name.getBytes("ISO-8859-1"),"UTF-8");//服务器默认使用 ISO-8859-1 编码接受参数，手动转为UTF-8

  String num=request.getParameter("num");

  String email=request.getParameter("email");

  String college=request.getParameter("college");
  college=new String(college.getBytes("ISO-8859-1"),"UTF-8");

  String major=request.getParameter("major");
  major=new String(major.getBytes("ISO-8859-1"),"UTF-8");

  String cclass=request.getParameter("class");
  cclass=new String(cclass.getBytes("ISO-8859-1"),"UTF-8");

  String year=request.getParameter("year");

  String home=request.getParameter("home");
  home=new String(home.getBytes("ISO-8859-1"),"UTF-8");

  String other=request.getParameter("other");
  other=new String(other.getBytes("ISO-8859-1"),"UTF-8");

  Connection con = DBUtil.getConn();
  PreparedStatement stmt=null;
  String sql = "insert into register(account,code,sex,name,num,email,college,major,class,year,home,other)values(?,?,?,?,?,?,?,?,?,?,?,?)";
  try {
   stmt = con.prepareStatement(sql);
   stmt.setString(1,account);
   stmt.setString(2,code);
   stmt.setString(3,sex);
   stmt.setString(4,name);
   stmt.setString(5,num);
   stmt.setString(6,email);
   stmt.setString(7,college);
   stmt.setString(8,major);
   stmt.setString(9,cclass);
   stmt.setString(10,year);
   stmt.setString(11,home);
   stmt.setString(12,other);
   //stmt.execute();
   int i=stmt.executeUpdate();
   if(i==1) {
    request.setAttribute("message", "添加成功！");
    request.getRequestDispatcher("regist.jsp").forward(request,response);
   }
   else
   {
    request.setAttribute("message", "添加失败！");
    request.getRequestDispatcher("regist.jsp").forward(request,response);
   }
   stmt.close();
   con.close();
  } catch (SQLException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

}

private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public StudentOperate() {
        super();
        // TODO Auto-generated constructor stub
    }

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub

}

/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}

}

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>注册</title>
<style>
.demo {
width: 150px;
height: 20px;
float: left;
}

.tian {
color: red;
float: left;
}

#end {
position: absolute;
top: 0px;
right: 0px;
}
</style>
</head>
<body background="2.jpg"
style="background-repeat: no-repeat; background-size: 100%;">
<h4 align="left">当前位置：添加学生信息</h4>

    </tr>
    <tr>
     <th>登录密码：</th>
     <td><input type="password" id="code" name="code" class="demo"
      onchange="checkcode()"> <span id="div2" class="tian"></span></td>

    </tr>
    <tr>
     <th>性别：</th>
     <td><select name="sex">
       <option value="男">男</option>
       <option value="女">女</option>
     </select></td>
    </tr>

</table>
<input style="margin-left: 42.5%" type="submit" value="添加">

  </div>
</form>
<script type="text/javascript">
  function checkaccount() {
   var div = document.getElementById("div1");
   div.innerHTML = "";
   var account = document.getElementById("account");
   if (account.value == " ") {
    div.innerHTML = "用户名不能为空！";
    account.focus();
    return false;
   }

  function checkemail() {
   var div = document.getElementById("div5");
   div.innerHTML = "";

var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;

   var email = document.getElementById("email");
   if (!reg.test(email.value)) {
    div.innerHTML = "大哥邮箱格式错误！";
    email.select();
    return false;
   }
   if (email.value == " ") {
    div.innerHTML = "大哥你还没输入自己的邮箱！";
    email.select();
    return false;
   }

return true;
}

function check() {

   if (checkaccount() && checkcode() && checkname() && checknum() && checkemail())
   {
    confirm("恭喜您成功入坑石家庄铁道大学！");
    return true;
   }
   confirm("格式错误！笨蛋！");
   return false;

}
</script>
</body>
</html>

结果样例：

posted @ 2019-10-21 23:07 Mr_WildFire 阅读(262) 评论(0) 编辑收藏举报

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数据库连接测试：学生信息系统界面

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