用户关系管理最终版

用户关系管理最终版

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>客户列表</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">


</head>

<body>
<h3 align="center">客户列表</h3>
<table border="1" width="70%" align="center">
<tr>
<th>客户姓名</th>
<th>性别</th>
<th>生日</th>
<th>手机</th>
<th>邮箱</th>
<th>描述</th>
<th>操作</th>
</tr>

<c:forEach items="${pb.beanList}" var="cstm">
<tr>
<td>${cstm.cname} </td>
<td>${cstm.gender}</td>
<td>${cstm.birthday}</td>
<td>${cstm.cellphone}</td>
<td>${cstm.email}</td>
<td>${cstm.description}</td>
<td>
<a href="<c:url value='/customerServlet?method=preEdit&cid=${cstm.cid}'/>" >编辑</a>
<a href="<c:url value='/customerServlet?method=delete&cid=${cstm.cid}'/>">删除</a>
</td>
</tr>
</c:forEach>
</table>
<br/>

<center>
第${pb.pc}/共${pb.tp}页

<a href="${pb.url }&pc=1" >首页</a>

<c:if test="${pb.pc > 1}">
<a href="${pb.url }&pc=${pb.pc-1}" >上一页</a>
</c:if>
<%-- 只是在计算begin和end的值 ! --%>
<c:choose>
<%-- 如果不足十页的话，就把所有的页数显示出来！ --%>
<c:when test="${pb.tp<=10 }">
<c:set var="begin" value="1"/>
<c:set var="end" value="${pb.tp }"/>
</c:when>
<c:otherwise>
<%-- 当页面大于十的时候 --%>
<c:set var="begin" value="${pb.pc-5}"/>
<c:set var="end" value="${pb.pc+4}"/>
<%-- 头溢出 --%>
<c:if test="${begin<1 }">
<c:set var="begin" value="1"/>
<c:set var="end" value="10"/>
</c:if>
<%-- 尾溢出 --%>
<c:if test="${end>pb.tp }">
<c:set var="begin" value="${pb.tp-9 }"/>
<c:set var="end" value="${pb.tp }"/>
</c:if>
</c:otherwise>
</c:choose>

<c:forEach var="i" begin="${begin }" end="${ end}">
<%--当就是当前页面的时候就不进行超链接了 --%>

<c:choose>
<c:when test="${i eq pb.pc}">
[${i }]
</c:when>

<c:otherwise>
<a href="${pb.url }&pc=${i }">[${i}]</a>
</c:otherwise>
</c:choose>
</c:forEach>

<c:if test="${pb.pc <pb.tp}">
<a href="${pb.url }&pc=${pb.pc+1}" >下一页</a>
</c:if>
<a href="${pb.url }&pc=${pb.tp }" >尾页</a>
</center>

</body>

package cn.edu.nsu.cstm.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.edu.nsu.cstm.domain.customer;
import cn.edu.nsu.cstm.domain.pageBean;
import cn.edu.nsu.cstm.service.customerService;
import cn.itcast.commons.CommonUtils;
import cn.itcast.servlet.BaseServlet;

public class customerServlet extends BaseServlet {
customerService customerService=new customerService();

public String add(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
customer c=CommonUtils.toBean(request.getParameterMap(), customer.class);//得到封装好的用户
c.setCid(CommonUtils.uuid());//将用户的id用uuid随机生成的数表似
customerService.add(c);//通过service添加用户
request.setAttribute("msg", c.getCname()+"用户注册成功");//保持信息到msg中
return "f:/msg.jsp";//f代表转发，若是r代表的就是重定向了
}
// public String findall(HttpServletRequest request, HttpServletResponse response)
// throws ServletException, IOException {
// //调用service得到用户的对象
// //保存到request域中
// //转发到list.jsp中
// request.setAttribute("cstmList", customerService.findall());
// return "f:/list.jsp";
// }

public String findall(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//获取页面传递的pc
//给定ps的值
//使用pc和ps调用service方法，得到pagebean，保存到request域中
//转发到list。jsp
int pc=getPc(request);
int ps=10;//给定ps的值，每页十行
pageBean<customer> pb=customerService.findall(pc,ps);
pb.setUrl(getUrl(request));

request.setAttribute("pb", pb);//将对象保存在request域中
return "f:/list.jsp";//转发到list.jsp中
}

private int getPc(HttpServletRequest request){

String value=request.getParameter("pc");
// System.out.println(value);
if(value==null||value.trim().isEmpty()){
return 1;
}
return Integer.parseInt(value);
}

public String preEdit(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//获取cid
//使用cid得到service的customer对象
//转发显示到表单中
String cid =request.getParameter("cid");
customer cstm=customerService.load(cid);
request.setAttribute("cstm", cstm);

return "f:/edit.jsp";
}
public String edit(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//封装表单对象到customer中
//调用service方法完成修改
//保存信息到request域中
//转发到msg.jsp中
customer c=CommonUtils.toBean(request.getParameterMap(), customer.class);
customerService.edit(c);
request.setAttribute("msg", c.getCname()+"用户修改成功");

return "f:/msg.jsp";
}
public String delete(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//封装表单对象到customer中
//调用service方法完成修改
//保存信息到request域中
//转发到msg.jsp中
customer c=CommonUtils.toBean(request.getParameterMap(), customer.class);
String idString=c.getCname();
customerService.delete(c);
request.setAttribute("msg", idString+"用户删除成功");

return "f:/msg.jsp";
}
// public String query(HttpServletRequest request, HttpServletResponse response)
// throws ServletException, IOException {
// //封装表单数据到customer对象之中，它有四个属性（cname, gender,cellphone,email）
// //调用service方法
// //保存在request域中
// //转发到list.jsp中
// customer criteria=CommonUtils.toBean(request.getParameterMap(), customer.class);
// List<customer> cstmList=customerService.query(criteria);
// request.setAttribute("cstmList", cstmList);
// return "f:/list.jsp";

public String query(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//把条件服装到customer对象之中
//得到pc
//给定ps
//使用pc和ps，以及条件对象，调用service方法得到pageBean
//把pagebean保存到request域中
//转发到list.jsp中
customer criteria=CommonUtils.toBean(request.getParameterMap(), customer.class);
int pc=getPc(request);
int ps=10;//给定ps的值，每页十行
pageBean<customer> pb=customerService.query(criteria,pc,ps);

//得到url保存到pb中
pb.setUrl(getUrl(request));
request.setAttribute("pb", pb);
return "f:/list.jsp";

}
private String getUrl(HttpServletRequest request){
String contextPath=request.getContextPath();
String servletPath=request.getServletPath();
String querysString=request.getQueryString();
if(querysString.contains("&pc=")){
int index=querysString.lastIndexOf("&pc=");
querysString=querysString.substring(0,index);
}

//我的tomcat下面配置了utf-8这个属性所有没用进行解码和编码这个过程

return contextPath+servletPath+"?"+querysString;
}

}

package cn.edu.nsu.cstm.dao;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.dbutils.QueryRunner;

import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;

import com.sun.org.apache.bcel.internal.generic.NEW;

import cn.edu.nsu.cstm.domain.customer;
import cn.edu.nsu.cstm.domain.pageBean;
import cn.itcast.jdbc.TxQueryRunner;

public class customerDao {
private QueryRunner qr = new TxQueryRunner();// 依赖此对象对数据库的使用进行操作

// 添加客户

public void add(customer c) {
try {
String sql = "INSERT INTO t_customer VALUES(?,?,?,?,?,?,?)";// 插入用户
Object[] params = { c.getCid(), c.getCname(), c.getGender(),
c.getBirthday(), c.getCellphone(), c.getEmail(),
c.getDescription() };// 为每一个用户进行赋值操作
qr.update(sql, params);// 处理开始
} catch (Exception e) {
throw new RuntimeException();// 抛出异常
}
}

public pageBean<customer> findall(int pc, int ps) {
// 他的pageBean对象pb
// 设置pb的pc和ps
// 得到beanList，设置给pb
// 返回pb
pageBean<customer> pb = null;
try {
pb = new pageBean<customer>();// 创建一个pb对象
pb.setPc(pc);// 向pb对象中设置当前的页数
pb.setPs(ps);// 向pb对象设置每页的记录数
String sql = "select count(*) from t_customer";// 遍历所有的数据得到总数
Number number = (Number) qr.query(sql, new ScalarHandler());// 得到总数，返回值为number类型
pb.setTr(number.intValue());// 将number类型转化为int类型存入pb对象之中去
sql = "select *from t_customer order by cname limit ?,?";// 创建sql语句
List<customer> beanList = qr.query(sql,
new BeanListHandler<customer>(customer.class), (pc - 1)
* ps, ps);// 通过传入的当前页数和每行的记录数，返回当前所对应的每一个对象
pb.setBeanList(beanList);
} catch (Exception e) {
throw new RuntimeException(e);
}
return pb;
}

public customer load(String cid) {
// 加载客户
try {
String sql = "select *from t_customer where cid=?";
return qr
.query(sql, new BeanHandler<customer>(customer.class), cid);
} catch (Exception e) {
throw new RuntimeException();
}
}

// 编辑客户
public void edit(customer c) {
try {
String sql = "update t_customer set cname=?,gender=?,birthday=?,cellphone=?,email=?,description=? where cid=?";
Object[] parmas = { c.getCname(), c.getGender(), c.getBirthday(),
c.getCellphone(), c.getEmail(), c.getDescription(),
c.getCid() };

qr.update(sql, parmas);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}

public void delete(customer c) {
String sql = "delete from t_customer where cid=?";
try {
qr.update(sql, c.getCid());
} catch (SQLException e) {
throw new RuntimeException(e);
}

}

// public List<customer> quer(customer criteria) {
// // 给出一个sql的前半句话
// StringBuilder sql = new StringBuilder(
// "select *from t_customer where 1=1");
// // 判断条件在追加子句
// List<Object> param = new ArrayList<Object>();
// // 创建一个Arraylist用来转载参数
// String cname = criteria.getCname();
// if (cname != null && !cname.trim().isEmpty()) {
// sql.append(" and cname=?");
// param.add(cname);
// }
// String gender = criteria.getGender();
// if (gender != null && !gender.trim().isEmpty()) {
// sql.append(" and gender=?");
// param.add(gender);
// }
// String cellphone = criteria.getCellphone();
// if (cellphone != null && !cellphone.trim().isEmpty()) {
// sql.append(" and cellphone=?");
// param.add(cellphone);
// }
// String email = criteria.getEmail();
// if (email != null && !email.trim().isEmpty()) {
// sql.append(" and email=?");
// param.add(email);
// }
// // 给出参数
// try {
// return qr.query(sql.toString(), new BeanListHandler<customer>(
// customer.class), param.toArray());
// } catch (SQLException e) {
// throw new RuntimeException(e);
// }
// }

public pageBean<customer> quer(customer criteria, int pc, int ps) {
pageBean<customer> pb=null;
try {
// 创建pageBean对象
// 设置已有的属性，pc和ps
// 得到tr
// 得到beanList对象

// 创建pb，设置已有的属性
pb = new pageBean<customer>();
pb.setPc(pc);
pb.setPs(ps);

// 得到tr
// 先得到sql的前半句话
// 在向sql中追加后半句话
StringBuffer cntsql = new StringBuffer(
"select count(*)from t_customer");
StringBuffer wheresq = new StringBuffer(" where 1=1");
List<Object> param = new ArrayList<Object>();
// 创建一个Arraylist用来转载参数
String cname = criteria.getCname();
if (cname != null && !cname.trim().isEmpty()) {
wheresq.append(" and cname=?");
param.add(cname);
}
String gender = criteria.getGender();
if (gender != null && !gender.trim().isEmpty()) {
wheresq.append(" and gender=?");
param.add(gender);
}
String cellphone = criteria.getCellphone();
if (cellphone != null && !cellphone.trim().isEmpty()) {
wheresq.append(" and cellphone=?");
param.add(cellphone);
}
String email = criteria.getEmail();
if (email != null && !email.trim().isEmpty()) {
wheresq.append(" and email=?");
param.add(email);
}
// 执行select count（*）from----

Number num = (Number) qr.query(cntsql.append(wheresq).toString(),
new ScalarHandler(), param.toArray());
pb.setTr(num.intValue());

// 得到beanList对象
StringBuffer sql = new StringBuffer("select *from t_customer");
StringBuffer limitsql = new StringBuffer(" limit ?,? ");
// parma中需要给出limit后面两个问好的值
param.add((pc - 1) * ps);
param.add(ps);
// 执行代码
List<customer> beanList = qr.query(
sql.append(wheresq).append(limitsql).toString(),
new BeanListHandler<customer>(customer.class),
param.toArray());
pb.setBeanList(beanList);
} catch (SQLException e) {
throw new RuntimeException(e);
}
return pb;
}

}

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原文地址：https://www.cnblogs.com/csnd/p/16675743.html