1207整理

<%@ 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>用户注册</title>
<script type="text/javascript">

//判断注册时输入的用户信息是否为空
function check()
{
    var uid = document.getElementById("userid");
    if (uid.value == "")
        {
        alert("用户代码不能为空");

        return false;

        }
    if(uform.password.value == "")
        {
         alert("密码不能为空");

        return false;
        }
    if(uform.password.value != uform.queren.value)
        {
         alert("两次输入密码不一致");

         return false;
        }
    return true;
    }
</script>
</head>
<body>

<form id="uform" action="SaveUser" method="get" onSubmit="return check()">

用户代码：<input id="userid" type="text" name="userid" width=30/>
<br>
用户名称：<input id="username" type="text" name="username" width=30/>
<br>
登录密码：<input id="password" type="password" name="password" width=30/>
<br>
确认密码：<input id="queren" type="password" name="queren" width=30/>
<br>
<input type="submit" value="提交"/>

</form>
</body>
</html>

zhuce

package com.hanqi;

import java.io.IOException;
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 java.sql.*;
/**
 * Servlet implementation class saveUser
 */
@WebServlet("/SaveUser")
public class SaveUser extends HttpServlet {
    private static final long serialVersionUID = 1L;

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

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        request.setCharacterEncoding("UTF-8");

        response.setContentType("text/html; charset=UTF-8");

        response.setCharacterEncoding("UTF-8");

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

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

        String pw =  request.getParameter("password");

        if(userid == null ||userid.trim().length() == 0)
        {
            response.getWriter().append("用户代码不能为空");
        }
        else if(username == null ||username.trim().length() == 0)
        {
            response.getWriter().append("用户名称不能为空");
        }
        else
        {
            try
            {
                Class.forName("oracle.jdbc.driver.OracleDriver");

                String url = "jdbc:oracle:thin:@localhost:1521:ORCL" ;

                Connection conn = DriverManager.getConnection(url, "test2", "1234");

                if(conn != null)
                {
                    //操作数据库
                    String sql = "insert into t_user (user_id,user_name,password)" + "values(?,?,?)" ;

                    // 执行SQL语句的类
                    PreparedStatement pps = conn.prepareStatement(sql);

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

                    pps.setString(1, userid);
                    pps.setString(2, username);
                    pps.setString(3, pw);

                    int row = pps.executeUpdate();//执行SQL语句并返回数据行数

                    if(row > 0)
                    {
                        //response.getWriter().append("保存"+row+"条数据成功");

                        response.sendRedirect("FindUserList");
                    }
                    else
                    {
                        response.getWriter().append("保存数据失败");
                    }

                    //释放资源

                    pps.close();

                    conn.close();
                }
                else
                {
                    response.getWriter().append("连接数据库失败");
                }
            }
            catch (Exception e)
            {
                e.printStackTrace();

                response.getWriter().append(e.getMessage());
            }
        }

        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @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);
    }

}

SaveUser

package com.hanqi;

import java.io.IOException;
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 java.sql.*;
import java.util.*;

/**
 * Servlet implementation class FindUserList
 */
@WebServlet("/FindUserList")
public class FindUserList extends HttpServlet {
    private static final long serialVersionUID = 1L;

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

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");

        response.setContentType("text/html; charset=UTF-8");

        response.setCharacterEncoding("UTF-8");

            try
            {
                //注册数据库驱动
                Class.forName("oracle.jdbc.driver.OracleDriver");

                //连接URL
                String url = "jdbc:oracle:thin:@localhost:1521:ORCL" ;

                // 驱动管理器  工厂模式
                Connection conn = DriverManager.getConnection(url, "test2", "1234");

                if(conn != null)
                {
                    //操作数据库
                    String sql = "select * from t_user";

                    // 执行SQL语句的类
                    Statement stm = conn.createStatement();

                    //执行查询，返回结果集
                    ResultSet rs = stm.executeQuery(sql);

                    //装载和传递
                    ArrayList<User> array = new ArrayList<User>();

                    if(rs != null)
                    {
                        //遍历结果集
                        while(rs.next())
                        {
                            User u = new User();

                            u.setUserID(rs.getString("user_id"));//取值
                            u.setUserName(rs.getString("user_name"));
                            u.setPassword(rs.getString("password"));
                            array.add(u);

                            response.getWriter().append("user_id = "+ rs.getString("user_id")+";");
                            response.getWriter().append("user_name = "+ rs.getString("user_name")+";");
                            response.getWriter().append("password = "+ rs.getString("password")+";");
                        }
                        request.setAttribute("userlist",array);

                        //释放
                        rs.close();
                    }
                    else
                    {
                        response.getWriter().append("结果集为空");
                    }

                    //response.getWriter().append("array = "+ array.size());
                    //释放资源

                    stm.close();

                    conn.close();
                }
                else
                {
                    response.getWriter().append("连接数据库失败");
                }
            }
            catch (Exception e)
            {
                e.printStackTrace();

                response.getWriter().append(e.getMessage());
            }
        request.getRequestDispatcher("ShowUserLiset.jsp").forward(request,response);
    }

    /**
     * @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);
    }

}

FindUserList

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ page import="java.util.*" %>
    <%@ page import="com.hanqi.*" %>
<!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>用户列表</title>
</head>
<body>
<%
Object obj = request.getAttribute("userlist");

if(obj != null)
{
    ArrayList<User> array = (ArrayList<User>)obj;

    //遍历
    for(User u:array)
    {
        out.print(u.getUserID() + "\t" + u.getUserName() + "\t" + u.getPassword() +"\t <a href=‘DeleteUser?userid="+u.getUserID()+"‘>删除</a>"
                +"<form action=‘EditUser‘ method=‘post‘>"
                +"<input type=‘hidden‘ name=‘userid‘ value=‘"+u.getUserID()+"‘/>"
                +"用户名称：<input type=‘text‘ name=‘username‘ value=‘"+u.getUserName()+"‘/>"
                +"密码：<input type=‘password‘ name=‘password‘ value=‘"+u.getPassword()+"‘/>"
                +"<input type=‘submit‘ value=‘提交‘/></form>"
                + "<br>");
    }
}
else
{
    out.append("用户列表为空");
}

%>

<br><br>
<a href = "zhuce.jsp">添加新用户</a>

</body>
</html>

ShowUserLiset

package com.hanqi;

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

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 com.hanqi.common.DBHelper;

/**
 * Servlet implementation class EditUser
 */
@WebServlet("/EditUser")
public class EditUser extends HttpServlet {
    private static final long serialVersionUID = 1L;

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

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        request.setCharacterEncoding("UTF-8");

        response.setContentType("text/html; charset=UTF-8");

        response.setCharacterEncoding("UTF-8");

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

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

        String pw =  request.getParameter("password");

        if(userid == null ||userid.trim().length() == 0)
        {
            response.getWriter().append("用户ID不能为空");
        }
        else if(username == null ||username.trim().length() == 0)
        {
            response.getWriter().append("用户名称不能为空");
        }
        else
        {
            try
            {
                Connection conn = DBHelper.getConnection();

                if(conn != null)
                {
                    //操作数据库
                    String sql = "update t_user set user_name= ? ,password = ?" + "where user_id=?" ;

                    // 执行SQL语句的类
                    PreparedStatement pps = conn.prepareStatement(sql);

                    //username = new String(username.getBytes("ISO-8859-1"),"UTF-8");

                    pps.setString(1, username);
                    pps.setString(2, pw);
                    pps.setString(3, userid);

                    int row = pps.executeUpdate();//执行SQL语句并返回数据行数

                    //释放资源

                    pps.close();

                    conn.close();

                    response.sendRedirect("FindUserList");

                    /*if(row > 0)
                    {
                        response.getWriter().append("保存"+row+"条数据成功");
                    }
                    else
                    {
                        response.getWriter().append("保存数据失败");
                    }
                    */

                }

                else
                {
                    response.getWriter().append("连接数据库失败");
                }

            }
            catch (Exception e)
            {
                e.printStackTrace();

                response.getWriter().append(e.getMessage());
            }
        }

    }

    /**
     * @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);
    }

}

EditUser

package com.hanqi.common;

import java.sql.*;

public class DBHelper
{
    public static Connection getConnection() throws Exception
    {
        //注册数据库驱动
        Class.forName("oracle.jdbc.driver.OracleDriver");

        //连接URL
        String url = "jdbc:oracle:thin:@localhost:1521:ORCL" ;

        // 驱动管理器  工厂模式
        Connection conn = DriverManager.getConnection(url, "test2", "1234");

        return conn;
    }

}

DBHelper

时间： 2024-10-10 16:34:17

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