作业:联系人管理

数据库表:

1.联系人表 contacts

-- Create table
create table CONTACTS
(
  id      NUMBER not null,
  name    VARCHAR2(20) not null,
  tel     NVARCHAR2(20) not null,
  groupid NUMBER not null
)
tablespace TEST
  pctfree 10
  initrans 1
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );
-- Create/Recreate primary, unique and foreign key constraints 
alter table CONTACTS
  add constraint PK_CONTACTS primary key (ID)
  using index 
  tablespace TEST
  pctfree 10
  initrans 2
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );

2.分组信息表 groups

-- Create table
create table GROUPS
(
  id   NUMBER not null,
  name VARCHAR2(20) not null
)
tablespace TEST
  pctfree 10
  initrans 1
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );
-- Create/Recreate primary, unique and foreign key constraints 
alter table GROUPS
  add constraint PK_GROUPS primary key (ID)
  using index 
  tablespace TEST
  pctfree 10
  initrans 2
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );

3,联系人id列自增长序列 SQ_CONTACTS_ID

-- Create sequence 
create sequence SQ_CONTACTS_ID
minvalue 1
maxvalue 9999999999999999999999999999
start with 21
increment by 1
cache 20;

javaee工程:lxr

工具类放在com.haq.comm包中,包括:

1,数据库连接工具类 DBHelper.java

package com.haq.comm;

import java.sql.*;

//数据库连接工具类
public class DBHelper {
    
    public static Connection getConnection() throws Exception
    {
        Connection conn = null;
        
        Class.forName("oracle.jdbc.driver.OracleDriver");
        
        String url = "jdbc:oracle:thin:@localhost:1521:orcl";
        
        conn = DriverManager.getConnection(url,"test","test");
        
        return conn;
    }

}

2,中文编码过滤器 ZhongWen.java

package com.haq.comm;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;

/**
 * Servlet Filter implementation class ZhongWen
 */
@WebFilter("/*")
public class ZhongWen implements Filter {

    /**
     * Default constructor. 
     */
    public ZhongWen() {
        // TODO Auto-generated constructor stub
    }

    /**
     * @see Filter#destroy()
     */
    public void destroy() {
        // TODO Auto-generated method stub
    }

    /**
     * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
     */
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // TODO Auto-generated method stub
        // place your code here
        
        //处理中文乱码的过滤器
        
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        response.setContentType("text/html; charset=UTF-8");

        // pass the request along the filter chain
        chain.doFilter(request, response);
    }

    /**
     * @see Filter#init(FilterConfig)
     */
    public void init(FilterConfig fConfig) throws ServletException {
        // TODO Auto-generated method stub
    }

}

模型层类:放在com.hanq.dao包中,包括:

1,封装联系人信息的实体类 Contacts.java

package com.haq.dao;

//实体类封装联系人信息
public class Contacts {
    
    private int id;
    private String name;
    private String tel;
    private int groupid;
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getTel() {
        return tel;
    }
    public void setTel(String tel) {
        this.tel = tel;
    }
    public int getGroupid() {
        return groupid;
    }
    public void setGroupid(int groupid) {
        this.groupid = groupid;
    }
    
    

}

2,封装联系人表数据库操作的类 ContDal.java

package com.haq.dao;

import java.util.*;
import java.sql.*;

import com.haq.comm.DBHelper;

//数据库操作类
public class ContDal {

    //插入数据
    public int insertCont(Contacts c  ) throws Exception
    {
        //初始化返回值行数
        int row = -1;
        //获取数据库连接
        Connection conn = DBHelper.getConnection();
        //如果获取成功
        if(conn != null)
        {
            //声明PreparedStatement对象
            PreparedStatement ps = null;
            
            try
            {
                //组织sql插入语句    
                String sql = "insert into contacts(id,name,tel,groupid) values(sq_contacts_id.nextval,?,?,?)";
                //获取PreparedStatement对象;
                ps = conn.prepareStatement(sql);
                //对sql语句中的参数赋值
                ps.setString(1, c.getName());
                ps.setString(2, c.getTel());
                ps.setInt(3, c.getGroupid());
                //执行插入操作,返回影响行数
                row = ps.executeUpdate();
            }
            catch(Exception e)
            {
                throw e;
            }
            finally
            {
                try
                {
                    //释放资源
                    ps.close();
                    conn.close();
                }
                catch(Exception e)
                {
                    //确保ps关闭失败时,数据库连接可正常关闭
                    conn.close();
                }
            }
            
        }
        //返回插入行数
        return row;
        
    }
    
    //查询方法
    public ArrayList<Contacts> selectContList() throws Exception
    {
        ArrayList<Contacts> arr = null;
        
        //获取数据库连接
        Connection conn = DBHelper.getConnection();
        
        if(conn != null)
        {
            Statement st = null;
            ResultSet rs = null;
            
            try
            {
                //组织sql查询语句
                String sql ="select * from contacts";
                //获取Statement
                st = conn.createStatement();
                //执行sql语句,获取ResultSet
                rs = st.executeQuery(sql);
                //实例化ArrayList对象
                arr = new ArrayList<Contacts>();
                if(rs != null)
                {
                    //遍历rs
                    while(rs.next())
                    {
                        //实例化实体类Contacts
                        Contacts c = new Contacts();
                        
                        c.setId(rs.getInt("id"));
                        c.setName(rs.getString("name"));
                        c.setTel(rs.getString("tel"));
                        c.setGroupid(rs.getInt("groupid"));
                        
                        arr.add(c);
                    }
                }
            }
            catch(Exception e)
            {
                throw e;
            }
            finally
            {
                try
                {
                    st.close();
                    rs.close();
                    conn.close();
                }
                catch(Exception e)
                {
                    conn.close();
                }
            }
        }
        
        
        return arr;
    }
    
    //删除方法
    public int deleteCont(int id ) throws Exception
    {
        //初始化返回值行数
        int row = -1;
        //获取数据库连接
        Connection conn = DBHelper.getConnection();
        //如果获取成功
        if(conn != null)
        {
            //声明PreparedStatement对象
            PreparedStatement ps = null;
            
            try
            {
                //组织sql插入语句    
                String sql = "delete from contacts where id = ?";
                //获取PreparedStatement对象;
                ps = conn.prepareStatement(sql);
                //对sql语句中的参数赋值
                ps.setInt(1, id);
                //执行插入操作,返回影响行数
                row = ps.executeUpdate();
            }
            catch(Exception e)
            {
                throw e;
            }
            finally
            {
                try
                {
                    //释放资源
                    ps.close();
                    conn.close();
                }
                catch(Exception e)
                {
                    //确保ps关闭失败时,数据库连接可正常关闭
                    conn.close();
                }
            }
            
        }
        //返回插入行数
        return row;
        
    }
    
    //修改方法
    public int updateCont(Contacts c, int id ) throws Exception
    {
        //初始化返回值行数
        int row = -1;
        //获取数据库连接
        Connection conn = DBHelper.getConnection();
        //如果获取成功
        if(conn != null)
        {
            //声明PreparedStatement对象
            PreparedStatement ps = null;
            
            try
            {
                //组织sql插入语句    
                String sql = "update contacts set name=?,tel=?,groupid=? where id=?";
                //获取PreparedStatement对象;
                ps = conn.prepareStatement(sql);
                //对sql语句中的参数赋值
                ps.setString(1, c.getName());
                ps.setString(2, c.getTel());
                ps.setInt(3, c.getGroupid());
                ps.setInt(4, id);
                //执行插入操作,返回影响行数
                row = ps.executeUpdate();
            }
            catch(Exception e)
            {
                throw e;
            }
            finally
            {
                try
                {
                    //释放资源
                    ps.close();
                    conn.close();
                }
                catch(Exception e)
                {
                    //确保ps关闭失败时,数据库连接可正常关闭
                    conn.close();
                }
            }
            
        }
        //返回插入行数
        return row;
        
    }
    
    //单条查询
    public Contacts seleteCont(int id) throws Exception
    {
        //声明返回值
        Contacts c = null;
        
        //获得连接
        Connection conn = DBHelper.getConnection();
        
        //如果获取到连接
        if(conn != null)
        {
            PreparedStatement ps = null;
            
            ResultSet rs = null;
            
            try
            {
                //组织数据库查询的sql语句
                String sql ="select * from contacts where id = ?";
                //获取PreparedStatement对象
                ps = conn.prepareStatement(sql);
                //添加sql语句参数
                ps.setInt(1, id);
                //执行sql语句,获取ResultSet对象
                rs = ps.executeQuery();
                //如果ResultSet获取到
                if(rs != null && rs.next())
                {
                    c = new Contacts();
                    
                    c.setId(rs.getInt("id"));
                    c.setName(rs.getString("name"));
                    c.setTel(rs.getString("tel"));
                    c.setGroupid(rs.getInt("groupid"));
                }

            }
            catch(Exception e)
            {
                
                throw e;
                
            }
            finally
            {
                //释放资源
                try
                {
                    
                    ps.close();
                    rs.close();
                    conn.close();
                }
                catch(Exception e)
                {
                    conn.close();
                }
            }
            
        }
        
        //返回Groups对象
        return c;
    }
    
}

3,封装分组信息数据的实体类 Groups.java

package com.haq.dao;

//分组实体类
public class Groups {

    //列作为属性,设为私有
    private int id;
    private String name;
    //对外开放get,set方法
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

4,封装分组表数据库操作的类 GroupDal.java

package com.haq.dao;

import java.sql.*;
import java.util.ArrayList;

import com.haq.comm.DBHelper;

//分组表数据库操作类
public class GroupDal {
    
    //查询全表信息
    public ArrayList<Groups> seleteGroupsList() throws Exception
    {
        //声明返回值
        ArrayList<Groups> arr = null;
        
        //获得连接
        Connection conn = DBHelper.getConnection();
        
        //如果获取到连接
        if(conn != null)
        {
            Statement st = null;
            
            ResultSet rs = null;
            
            try
            {
                //组织数据库查询的sql语句
                String sql ="select * from groups";
                //获取Statement对象
                st = conn.createStatement();
                //执行sql语句,获取ResultSet对象
                rs = st.executeQuery(sql);
                //如果ResultSet获取到
                if(rs != null)
                {
                    //实例化ArrayList<Groups>
                    arr = new ArrayList<Groups>();
                    
                    //遍历rs,将数据添加到Groups实体类的对象中
                    while(rs.next())
                    {
                        //实例化Groups
                        Groups g = new Groups();
                        g.setId(rs.getInt("id"));
                        g.setName(rs.getString("name"));
                        //向集合中添加数据
                        arr.add(g);
                    }
                    
                }
            }
            catch(Exception e)
            {
                
                throw e;
                
            }
            finally
            {
                //释放资源
                try
                {
                    
                    st.close();
                    rs.close();
                    conn.close();
                }
                catch(Exception e)
                {
                    conn.close();
                }
            }
            
        }
        
        //返回Groups对象
        return arr;
    }
    
    //查询单条记录方法
    public Groups seleteGroups(int id) throws Exception
    {
        //声明返回值
        Groups g = null;
        
        //获得连接
        Connection conn = DBHelper.getConnection();
        
        //如果获取到连接
        if(conn != null)
        {
            PreparedStatement ps = null;
            
            ResultSet rs = null;
            
            try
            {
                //组织数据库查询的sql语句
                String sql ="select * from groups where id = ?";
                //获取PreparedStatement对象
                ps = conn.prepareStatement(sql);
                //添加sql语句参数
                ps.setInt(1, id);
                //执行sql语句,获取ResultSet对象
                rs = ps.executeQuery();
                //如果ResultSet获取到
                if(rs != null && rs.next())
                {
                    g = new Groups();
                    
                    g.setId(rs.getInt("id"));
                    g.setName(rs.getString("name"));
                }

            }
            catch(Exception e)
            {
                
                throw e;
                
            }
            finally
            {
                //释放资源
                try
                {
                    
                    ps.close();
                    rs.close();
                    conn.close();
                }
                catch(Exception e)
                {
                    conn.close();
                }
            }
            
        }
        
        //返回Groups对象
        return g;
    }

}

控制层Servlet:放于com.hanq包中,包括:

1,插入联系人 InsertCont.java

package com.haq;

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 com.haq.dao.ContDal;
import com.haq.dao.Contacts;

/**
 * Servlet implementation class InsertCont
 */
@WebServlet("/InsertCont")
public class InsertCont extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public InsertCont() {
        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
        //接收表单数据
        String name = request.getParameter("name");
        String tel = request.getParameter("tel");
        String groupid = request.getParameter("groupid");
        //验证数据是否正确传递
        if(name == null || name.trim().length() ==0)
        {
            response.getWriter().append("姓名不能为空");
        }
        else if(tel == null || tel.trim().length() ==0)
        {
            response.getWriter().append("电话不能为空");
        }
        else if(groupid == null || groupid.trim().length() ==0)
        {
            response.getWriter().append("分组不能为空");
        }
        else
        {
            //实例化联系人实体类
            Contacts c = new Contacts();
            //将接收到的数据添加到对象中
            c.setName(name);
            c.setTel(tel);
            c.setGroupid(Integer.parseInt(groupid));
            
            //实例化数据库操作类
            ContDal cd = new ContDal();
            //调用添加方法添加
            try {
                
                int row = cd.insertCont(c);
                response.getWriter().append("成功添加" + row + "条数据");
                
            } catch (Exception e) {
                
                response.getWriter().append("添加失败;错误信息:" + e.getMessage());
            }
            
            
        }
        
        //跳转回主页面
        response.setHeader("refresh", "1;URL=ContMana.jsp");
        //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);
    }

}

2,删除联系人 DeleteCont.java

package com.haq;

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 com.haq.dao.*;

/**
 * Servlet implementation class DeleteCont
 */
@WebServlet("/DeleteCont")
public class DeleteCont extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public DeleteCont() {
        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
        
        //接收参数
        String id = request.getParameter("id");
        
        if(id == null || id.trim().length() == 0)
        {
            response.getWriter().append("id不能为空");
        }
        else
        {
            //实例化数据库操作类
            ContDal cd = new ContDal();
            
            try {
                int row = cd.deleteCont(Integer.parseInt(id));
                response.getWriter().append("成功删除" + row + "条数据");
            } catch (Exception e) {
                // TODO Auto-generated catch block
                response.getWriter().append(e.getMessage());
            }
            
        }
        
        //跳转回主页面
        response.setHeader("refresh", "1;URL=ContMana.jsp");
        //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);
    }

}

3,修改联系人 UpdateCont.java

package com.haq;

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 com.haq.dao.ContDal;
import com.haq.dao.Contacts;

/**
 * Servlet implementation class UpdateCont
 */
@WebServlet("/UpdateCont")
public class UpdateCont extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public UpdateCont() {
        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
        
                //接收表单数据
                String name = request.getParameter("name");
                String tel = request.getParameter("tel");
                String groupid = request.getParameter("groupid");
                String id = request.getParameter("id");
                //验证数据是否正确传递
                if(name == null || name.trim().length() ==0)
                {
                    response.getWriter().append("姓名不能为空");
                }
                else if(tel == null || tel.trim().length() ==0)
                {
                    response.getWriter().append("电话不能为空");
                }
                else if(groupid == null || groupid.trim().length() ==0)
                {
                    response.getWriter().append("分组不能为空");
                }
                else if(id == null || id.trim().length() ==0)
                {
                    response.getWriter().append("id不能为空");
                }
                else
                {
                    //实例化联系人实体类
                    Contacts c = new Contacts();
                    //将接收到的数据添加到对象中
                    c.setName(name);
                    c.setTel(tel);
                    c.setGroupid(Integer.parseInt(groupid));
                    
                    //实例化数据库操作类
                    ContDal cd = new ContDal();
                    //调用添加方法添加
                    try {
                        
                        int row = cd.updateCont(c,Integer.parseInt(id));
                        response.getWriter().append("成功修改" + row + "条数据");
                        
                    } catch (Exception e) {
                        
                        response.getWriter().append("添加失败;错误信息:" + e.getMessage());
                    }
                    
                    
                }
                
                //跳转回主页面
                response.setHeader("refresh", "2;URL=ContMana.jsp");
        
        //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);
    }

}

表现层jsp页面,包括:

1,显示联系人列表及添加 ContMana.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="com.haq.*" %>
<%@ page import="com.haq.dao.*" %>
<%@ page import="com.haq.comm.*" %>
<%@ page import="java.util.*" %>     
    
<!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>联系人管理</title>

<script type="text/javascript" src="jquery-1.5.2.min.js"></script>

<script type="text/javascript">

//验证表单数据函数
function checkform()
{
    var name = form1.name.value;
    var tel = form1.tel.value;
    var group = form1.groupid.value;
    
    var zhz = /d{11}/;
    
    if(name == "" || $.trim(name) == "")
    {
        alert("姓名不能为空");
        return false;    
    }
    else if(tel == "" || $.trim(tel) == "")
    {
        alert("电话不能为空");
        return false;    
    }
    else if(!zhz.test(tel))
    {
        alert("电话格式错误");
        return false;    
    }
    else if(group == "" || $.trim(group) == "")
    {
        alert("分组不能为空");
        return false;    
    }
    else
    {
        return true;    
    }
    
}

//验证删除
function deletecheck()
{
    return(confirm("确定删除联系人吗?"))    
}

//修改联系人

//显示添加表单

    $(document).ready(function(e) {
        $("#show").click(function()
        {
            $("#add").toggle();
        }
        );
    });    
    


</script>

</head>


<body>
<!--显示联系人表格-->
<table border="1" width="300">
    <tr>
        <td></td>
        <td>姓名</td>
        <td>电话</td>
        <td>分组</td>
    </tr>
    <%
    //查询联系人信息
    //实例化集合
    ArrayList<Contacts> arr1 = new ArrayList<Contacts>();
    //实例化数据库操作类
    ContDal cd = new ContDal();
    
    arr1 = cd.selectContList();
    
    if(arr1 != null)
    {
        for(Contacts c : arr1)
        {
    %>
        <tr>
            <td>
                <a href="updateCont.jsp?id=<%=c.getId() %>" >编辑</a>
                <a href="DeleteCont?id=<%=c.getId() %>" onclick="return deletecheck()">删除</a>
            </td>
            <td><%=c.getName() %></td>
            <td><%=c.getTel() %></td>
            
            <td>
            <%
            int gid = c.getGroupid(); 
            //实例化数据操作类
            GroupDal gd1 = new GroupDal();
            
            Groups g1 = gd1.seleteGroups(gid);
            
            out.print(g1.getName());
            %>
            </td>
        
        </tr>
    
    <%
    
        }
    }
    
    %>

</table>
<br>
<input type="button" id="show" name="show" value="添加联系人">

<!--添加联系人表单-->
<div id="add" style="display:none">

<form action="InsertCont" id="form1" name="form1" onsubmit="return checkform()" method="post">

    姓名:<input type="text" id="name" name="name"/><br>
    电话:<input type="text" name="tel" id="tel" maxlength="11" /><br>
    分组:<select id="groupid" name="groupid">
    <%
    
    //查询分组信息
    
    GroupDal gd = new GroupDal();
    
    ArrayList<Groups> arr = gd.seleteGroupsList();
    
    //遍历输出
    if(arr != null)
    {
        for(Groups g : arr )
        {
    %>
    <option value="<%=g.getId()%>"><%=g.getName() %></option>
    
    <%        
        }
    }
    
    %>
    </select><br>
    
    <input type="submit" value="添加"/>

</form>

</div>

</body>
</html>

2,修改联系人 updateCont.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    
<%@ page import="com.haq.*" %>
<%@ page import="com.haq.dao.*" %>
<%@ page import="com.haq.comm.*" %>
<%@ page import="java.util.*" %>   
<!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>修改联系人</title>

<script type="text/javascript" src="jquery-1.5.2.min.js"></script>

<script type="text/javascript">

//验证表单数据函数
function checkform()
{
    var name = form1.name.value;
    var tel = form1.tel.value;
    var group = form1.groupid.value;
    
    var zhz = /d{11}/;
    
    if(name == "" || $.trim(name) == "")
    {
        alert("姓名不能为空");
        return false;    
    }
    else if(tel == "" || $.trim(tel) == "")
    {
        alert("电话不能为空");
        return false;    
    }
    else if(!zhz.test(tel))
    {
        alert("电话格式错误");
        return false;    
    }
    else if(group == "" || $.trim(group) == "")
    {
        alert("分组不能为空");
        return false;    
    }
    else
    {
        return true;    
    }
    
}


</script>
</head>
<body>

<!--修改联系人表单-->




<%
    //接收参数id
    String id = request.getParameter("id");

    if(id == null || id.trim().length() == 0)
    {
        out.print("参数错误");
        response.setHeader("refresh","1;url=ContMana.jsp");
    }
    else
    {
    //查询联系人信息
    //实例化Contacts
    Contacts c = new Contacts();
    //实例化数据库操作类
    ContDal cd = new ContDal();
    
    c = cd.seleteCont(Integer.parseInt(id));
    
    %>

<form action="UpdateCont?id=<%=c.getId() %>" id="form1" name="form1" onsubmit="return checkform()" method="post">

    姓名:<input type="text" id="name" name="name" value="<%=c.getName() %>"><br>
    电话:<input type="text" name="tel" id="tel" maxlength="11" value="<%=c.getTel() %>"><br>
    分组:<select id="groupid" name="groupid">
    
    <% 
    //查询分组信息
    GroupDal gd = new GroupDal();
    
    ArrayList<Groups> arr = gd.seleteGroupsList();
    
    //遍历输出
    if(arr != null)
    {
        for(Groups g : arr )
        {
    %>
    <option value="<%=g.getId()%>" <%= ((c.getGroupid()==g.getId())? "selected" : "" ) %>><%=g.getName() %></option>
    
    <%        
        }
    }
    
    %>
    </select><br>
    
    <input type="submit" value="修改"/>
    <%
    }
    %>
</form>
</body>

</html>