案例49-crm练习获取客户列表带有分页和筛选功能

1 案例分析

2 书写步骤

1.封装PageBean

2.书写Action

3.书写Service

4.书写Dao   注意清空之前设置的聚合函数  dc.setProjection(null);

5.完成strutx以及spring的配置

6.书写前台list.jsp页面

3 代码实现

1 封装PageBean

package www.test.utils;

import java.util.List;

public class PageBean {

    //当前页
    private Integer currentPage;
    //当前页显示的条数
    private Integer pageSize;
    //总页数
    private Integer totalPage;
    //总记录数
    private Integer totalCount;

    //分页列表的数据
    private List list;

    public PageBean(Integer currentPage, Integer pageSize, Integer totalCount) {
        this.currentPage = currentPage;
        this.pageSize = pageSize;
        this.totalCount = totalCount;

        //如果没有指定显示那一页，就显示第一页。
        if (this.currentPage == null) {
            this.currentPage = 1;
        }

        //如果没有指定每页显示几条数据，就默认显示3条。
        if (this.pageSize == null) {
            this.pageSize = 3;
        }

        //计算总页数
        this.totalPage = (this.totalCount + this.pageSize - 1) / this.pageSize;
        //this.totalPage = (int) Math.ceil((this.totalCount*1.0)/this.pageSize);

        //判断当前页数是否超出范围
        //不能小于1
        if (this.currentPage < 1) {
            this.currentPage = 1;
        }
        //不能大于总页数
        if (this.currentPage > this.totalPage) {
            this.currentPage = this.totalPage;
        }
    }

    //计算起始索引
    public Integer getStart() {
        return (this.currentPage - 1) * this.pageSize;
    }

    public Integer getCurrentPage() {
        return currentPage;
    }

    public void setCurrentPage(Integer currentPage) {
        this.currentPage = currentPage;
    }

    public Integer getPageSize() {
        return pageSize;
    }

    public void setPageSize(Integer pageSize) {
        this.pageSize = pageSize;
    }

    public Integer getTotalPage() {
        return totalPage;
    }

    public void setTotalPage(Integer totalPage) {
        this.totalPage = totalPage;
    }

    public Integer getTotalCount() {
        return totalCount;
    }

    public void setTotalCount(Integer totalCount) {
        this.totalCount = totalCount;
    }

    public List getList() {
        return list;
    }

    public void setList(List list) {
        this.list = list;
    }

}

2.书写Action

package www.test.web.action;

import org.apache.commons.lang3.StringUtils;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Restrictions;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

import www.test.domain.Customer;
import www.test.service.CustomerService;
import www.test.utils.PageBean;

public class CustomerAction extends ActionSupport implements ModelDriven<Customer>{

    private Customer customer = new Customer();
    
    private CustomerService cs;
    private Integer currentPage;
    private Integer pageSize;
    
    
    //获取客户列表
    public String list() throws Exception {
        //封装离线查询对象
        DetachedCriteria dc = DetachedCriteria.forClass(Customer.class);
        
        //判断并封装参数
        if(StringUtils.isNotBlank(customer.getCust_name())){
            dc.add(Restrictions.like("cust_name", "%"+customer.getCust_name()+"%"));
        }
        
        //1 调用Service查询分页数据(PageBean)
        PageBean pb = cs.getPageBean(dc,currentPage,pageSize);
        //2 将PageBean放入request域,转发到列表页面显示
        ActionContext.getContext().put("pageBean", pb);
        return "list";
    }



    @Override
    public Customer getModel() {
        
        return customer;
    }



    public CustomerService getCs() {
        return cs;
    }



    public void setCs(CustomerService cs) {
        this.cs = cs;
    }



    public Integer getCurrentPage() {
        return currentPage;
    }



    public void setCurrentPage(Integer currentPage) {
        this.currentPage = currentPage;
    }



    public Integer getPageSize() {
        return pageSize;
    }



    public void setPageSize(Integer pageSize) {
        this.pageSize = pageSize;
    }
    
    
}

3.书写Service

package www.test.service;

import org.hibernate.criterion.DetachedCriteria;

import www.test.utils.PageBean;

public interface CustomerService {

    PageBean getPageBean(DetachedCriteria dc, Integer currentPage, Integer pageSize);

}

package www.test.service.impl;

import java.util.List;

import org.hibernate.criterion.DetachedCriteria;

import www.test.dao.CustomerDao;
import www.test.domain.Customer;
import www.test.service.CustomerService;
import www.test.utils.PageBean;

public class CustomerServiceImpl implements CustomerService {

    private CustomerDao cd;
    @Override
    public PageBean getPageBean(DetachedCriteria dc, Integer currentPage, Integer pageSize) {

        // 1 调用dao层查询总记录数
        Integer totalCount = cd.getTotalCount(dc);
        
        // 2创建pageBean对象
        PageBean pb = new PageBean(currentPage, pageSize, totalCount);
        
        
        // 3查询客户列表
        List<Customer> list = cd.getPageList(dc,pb.getStart(),pb.getPageSize());
        
        // 4返回pageBean
        pb.setList(list);
        return pb;
    }
    public CustomerDao getCd() {
        return cd;
    }
    public void setCd(CustomerDao cd) {
        this.cd = cd;
    }

}

4.书写Dao

package www.test.dao;

import java.util.List;

import org.hibernate.criterion.DetachedCriteria;

import www.test.domain.Customer;

public interface CustomerDao {

    //查询总记录数
    Integer getTotalCount(DetachedCriteria dc);

    //根据条件查询客户列表
    List<Customer> getPageList(DetachedCriteria dc, Integer start, Integer pageSize);

}

package www.test.dao.impl;

import java.util.List;

import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Projection;
import org.hibernate.criterion.Projections;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;

import www.test.dao.CustomerDao;
import www.test.domain.Customer;

public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao{

    @Override
    public Integer getTotalCount(DetachedCriteria dc) {
        //设置查询聚合函数，总记录数
        dc.setProjection(Projections.rowCount());
        
        List<Long> list = (List<Long>) super.getHibernateTemplate().findByCriteria(dc);
        
        //清空之前设置的聚合函数
        dc.setProjection(null);
        
        if(list!=null&&list.size()>0){
            Long count = list.get(0);
            return count.intValue();
        }else{
            return null;
        }
    }

    @Override
    public List<Customer> getPageList(DetachedCriteria dc, Integer start, Integer pageSize) {
        
        List<Customer> list = (List<Customer>) super.getHibernateTemplate().findByCriteria(dc, start, pageSize);
        return list;
    }

}

5.完成strutx以及spring的配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
    <!-- <constant name="struts.devMode" value="true"></constant> -->

    <!--   
    #struts.objectFactory = spring    将action的创建交给spring容器    
    struts.objectFactory.spring.autoWire = name spring负责装配Action依赖属性
    -->
    <constant name="struts.objectFactory" value="spring"></constant>
    
    <package name="crm" namespace="/" extends="struts-default"> 
        
        <global-exception-mappings>
            <exception-mapping result="error" exception="java.lang.RuntimeException"></exception-mapping>
        </global-exception-mappings>
        <action name="UserAction_*" class="userAction" method="{1}">
            <result name="toHome" type="redirect">/index.htm</result>
            <result name="error" type="dispatcher">/login.jsp</result>
        </action>
        <action name="CustomerAction_*" class="customerAction" method="{1}">
            <result name="list" type="dispatcher">/jsp/customer/list.jsp</result>
        </action>
    </package>
</struts>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
       xmlns="http://www.springframework.org/schema/beans" 
       xmlns:context="http://www.springframework.org/schema/context" 
       xmlns:aop="http://www.springframework.org/schema/aop" 
       xmlns:tx="http://www.springframework.org/schema/tx" 
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
              http://www.springframework.org/schema/beans/spring-beans-4.2.xsd 
                          http://www.springframework.org/schema/context 
              http://www.springframework.org/schema/context/spring-context-4.2.xsd 
                          http://www.springframework.org/schema/aop 
              http://www.springframework.org/schema/aop/spring-aop-4.2.xsd 
                          http://www.springframework.org/schema/tx 
              http://www.springframework.org/schema/tx/spring-tx-4.2.xsd ">
    
    <!--5 读取database.properties文件 -->
    <context:property-placeholder location="classpath:database.properties"/>
    
    <!--6 准备druid连接池 -->
    <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driverClass}"></property>
        <property name="url" value="${jdbc.jdbcUrl}"></property>
        <property name="username" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    
    
    <!--7 核心事务管理器  依赖于SessionFactory-->
    <bean name="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    
    <!--8 配置通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="save*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="persist*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="update*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="modify*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="delete*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="remove*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="find*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/>
            <tx:method name="get*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/>
        </tx:attributes>
    </tx:advice>
    
    <!--9 配置将通知织入目标对象  配置切点+配置切面 -->
    <aop:config>
        <aop:pointcut expression="execution(* www.test.service.impl.*ServiceImpl.*(..))" id="txPc"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPc"/>
    </aop:config>
    
    
    
    
    
    
    
    
    
    <!--1 action -->
    <bean name="userAction" class="www.test.web.action.UserAction" scope="prototype">
        <property name="us" ref="userService"></property>
    </bean>
    <bean name="customerAction" class="www.test.web.action.CustomerAction" scope="prototype">
        <property name="cs" ref="customerService"></property>
    </bean>
    
    <!--2 service  -->
    <bean name="userService" class="www.test.service.impl.UserServiceImpl">
        <property name="ud" ref="userDao"></property>
    </bean>
    <bean name="customerService" class="www.test.service.impl.CustomerServiceImpl">
        <property name="cd" ref="customerDao"></property>
    </bean>
    
    <!--3 dao -->
    <bean name="userDao" class="www.test.dao.impl.UserDaoImpl">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <bean name="customerDao" class="www.test.dao.impl.CustomerDaoImpl">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    
    <!--4 将SessionFactory配置到spring容器中 -->
    <!-- 加载配置方案1:仍然使用外部的hibernate.cfg.xml配置信息 -->
    <!-- <bean name="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
    </bean> -->
    
    <!-- 加载配置方案2:在spring配置中放置hibernate配置信息 -->
    <bean name="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
        <!-- 将连接池注入到sessionFactory, hibernate会通过连接池获得连接 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- 配置hibernate基本信息 -->
        <property name="hibernateProperties">
            <props>
                <!--  必选配置 -->
                <!-- <prop key="hibernate.connection.driver_class">com.mysql.jdbc.Driver</prop>
                <prop key="hibernate.connection.url">jdbc:mysql:///hibernate</prop>
                <prop key="hibernate.connection.username">root</prop>
                <prop key="hibernate.connection.password">root</prop> -->
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                
                <!--  可选配置 -->
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
        <!-- 引入orm元数据,指定orm元数据所在的包路径,spring会自动读取包中的所有配置 -->
        <property name="mappingDirectoryLocations" value="classpath:www/test/domain"></property>
    </bean>
    
</beans>

6.书写前台list.jsp页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<TITLE>客户列表</TITLE>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<LINK href="${pageContext.request.contextPath }/css/Style.css"
    type=text/css rel=stylesheet>
<LINK href="${pageContext.request.contextPath }/css/Manage.css"
    type=text/css rel=stylesheet>
<script type="text/javascript"
    src="${pageContext.request.contextPath }/js/jquery-1.4.4.min.js"></script>
<SCRIPT language=javascript>
    function changePage(pageNum){
        //alert(pageNum);
        //1 将页码的值放入对应表单隐藏域中
        $("#currentPageInput").val(pageNum);
        //2提交表达
        $("#pageForm").submit();
    }
    
    function changePageSize(pageSize){
        //alert(pageSize);    
        //1 将页码的值放入对应表单隐藏域中
        $("#pageSizeInput").val(pageSize);
        //2提交表达
        $("#pageForm").submit();
    }
</SCRIPT>

<META content="MSHTML 6.00.2900.3492" name=GENERATOR>
</HEAD>
<BODY>
    <TABLE cellSpacing=0 cellPadding=0 width="98%" border=0>
        <TBODY>
            <TR>
                <TD width=15><IMG
                    src="${pageContext.request.contextPath }/images/new_019.jpg"
                    border=0></TD>
                <TD width="100%"
                    background="${pageContext.request.contextPath }/images/new_020.jpg"
                    height=20></TD>
                <TD width=15><IMG
                    src="${pageContext.request.contextPath }/images/new_021.jpg"
                    border=0></TD>
            </TR>
        </TBODY>
    </TABLE>
    <TABLE cellSpacing=0 cellPadding=0 width="98%" border=0>
        <TBODY>
            <TR>
                <TD width=15 background=${pageContext.request.contextPath }
                    /images/new_022.jpg><IMG
                    src="${pageContext.request.contextPath }/images/new_022.jpg"
                    border=0></TD>
                <TD vAlign=top width="100%" bgColor=#ffffff>
                    <TABLE cellSpacing=0 cellPadding=5 width="100%" border=0>
                        <TR>
                            <TD class=manageHead>当前位置：客户管理 &gt; 客户列表</TD>
                        </TR>
                        <TR>
                            <TD height=2></TD>
                        </TR>
                    </TABLE>
                    <TABLE borderColor=#cccccc cellSpacing=0 cellPadding=0 width="100%"
                        align=center border=0>
                        <TBODY>
                            <TR>
                                <TD height=25>
                                    <FORM id="pageForm" name="customerForm"
                                        action="${pageContext.request.contextPath }/CustomerAction_list"
                                        method=post>
                                        <!-- 隐藏域 用于传递当前页面 -->
                                        <input type="hidden" name="currentPage"  id="currentPageInput"
                                        value="<s:property  value="#pageBean.currentPage"/>">
                                        <!-- 隐藏域 用于传递每页显示的条数 -->
                                        <input type="hidden" name="pageSize"  id="pageSizeInput"
                                        value="<s:property  value="#pageBean.pageSize"/>">
                                        
                                        <TABLE cellSpacing=0 cellPadding=2 border=0>
                                            <TBODY>
                                                <TR>
                                                    <TD>客户名称：</TD>
                                                    <TD><INPUT class=textbox id=sChannel2
                                                        style="WIDTH: 80px" maxLength=50 name="cust_name"
                                                        value="${param.cust_name}"></TD>

                                                    <TD><INPUT class=button id=sButton2 type=submit
                                                        value=" 筛选 " name=sButton2></TD>
                                                </TR>
                                            </TBODY>
                                        </TABLE>
                                    </FORM>
                                </TD>
                            </TR>

                            <TR>
                                <TD>
                                    <TABLE id=grid
                                        style="BORDER-TOP-WIDTH: 0px; FONT-WEIGHT: normal; BORDER-LEFT-WIDTH: 0px; BORDER-LEFT-COLOR: #cccccc; BORDER-BOTTOM-WIDTH: 0px; BORDER-BOTTOM-COLOR: #cccccc; WIDTH: 100%; BORDER-TOP-COLOR: #cccccc; FONT-STYLE: normal; BACKGROUND-COLOR: #cccccc; BORDER-RIGHT-WIDTH: 0px; TEXT-DECORATION: none; BORDER-RIGHT-COLOR: #cccccc"
                                        cellSpacing=1 cellPadding=2 rules=all border=0>
                                        <TBODY>
                                            <TR
                                                style="FONT-WEIGHT: bold; FONT-STYLE: normal; BACKGROUND-COLOR: #eeeeee; TEXT-DECORATION: none">
                                                <TD>客户名称</TD>
                                                <TD>客户级别</TD>
                                                <TD>客户来源</TD>
                                                <TD>联系人</TD>
                                                <TD>电话</TD>
                                                <TD>手机</TD>
                                                <TD>操作</TD>
                                            </TR>
                                            <s:iterator value="#pageBean.list" var="cust">
                                                <TR
                                                    style="FONT-WEIGHT: normal; FONT-STYLE: normal; BACKGROUND-COLOR: white; TEXT-DECORATION: none">
                                                    <TD><s:property value="#cust.cust_name" /></TD>
                                                    <TD><s:property value="#cust.cust_level" /></TD>
                                                    <TD><s:property value="#cust.cust_source" /></TD>
                                                    <TD><s:property value="#cust.cust_linkman" /></TD>
                                                    <TD><s:property value="#cust.cust_phone" /></TD>
                                                    <TD><s:property value="#cust.cust_mobile" /></TD>
                                                    <TD><a
                                                        href="${pageContext.request.contextPath }/customerServlet?method=edit&custId=${customer.cust_id}">修改</a>
                                                        &nbsp;&nbsp; <a
                                                        href="${pageContext.request.contextPath }/customerServlet?method=delete&custId=${customer.cust_id}">删除</a>
                                                    </TD>
                                                </TR>
                                            </s:iterator>
                                            <%-- <s:iterator value="#list"  >
                                                <TR         
                                                    style="FONT-WEIGHT: normal; FONT-STYLE: normal; BACKGROUND-COLOR: white; TEXT-DECORATION: none">
                                                    <TD>
                                                        <s:property value="cust_name" />
                                                    </TD>
                                                    <TD>
                                                    <s:property value="cust_level" />
                                                    </TD>
                                                    <TD>
                                                    <s:property value="cust_source" />
                                                    </TD>
                                                    <TD>
                                                    <s:property value="cust_linkman" />
                                                    </TD>
                                                    <TD>
                                                    <s:property value="cust_phone" />
                                                    </TD>
                                                    <TD>
                                                    <s:property value="cust_mobile" />
                                                    </TD>
                                                    <TD>
                                                    <a href="${pageContext.request.contextPath }/customerServlet?method=edit&custId=${customer.cust_id}">修改</a>
                                                    &nbsp;&nbsp;
                                                    <a href="${pageContext.request.contextPath }/customerServlet?method=delete&custId=${customer.cust_id}">删除</a>
                                                    </TD>
                                                </TR>
                                                </s:iterator> --%>
                                            <%-- <c:forEach items="${list }" var="customer">
                                                <TR         
                                                    style="FONT-WEIGHT: normal; FONT-STYLE: normal; BACKGROUND-COLOR: white; TEXT-DECORATION: none">
                                                    <TD>${customer.cust_name }</TD>
                                                    <TD>${customer.cust_level }</TD>
                                                    <TD>${customer.cust_source }</TD>
                                                    <TD>${customer.cust_linkman }</TD>
                                                    <TD>${customer.cust_phone }</TD>
                                                    <TD>${customer.cust_mobile }</TD>
                                                    <TD>
                                                    <a href="${pageContext.request.contextPath }/customerServlet?method=edit&custId=${customer.cust_id}">修改</a>
                                                    &nbsp;&nbsp;
                                                    <a href="${pageContext.request.contextPath }/customerServlet?method=delete&custId=${customer.cust_id}">删除</a>
                                                    </TD>
                                                </TR>
                                                
                                                </c:forEach> --%>

                                        </TBODY>
                                    </TABLE>
                                </TD>
                            </TR>

                            <TR>
                                <TD><SPAN id=pagelink>
                                        <DIV
                                            style="LINE-HEIGHT: 20px; HEIGHT: 20px; TEXT-ALIGN: right">
                                            共[<B><s:property value="#pageBean.totalCount" /></B>]条记 录,[<B>
                                                <s:property value="#pageBean.currentPage" />
                                            </B>]页 ,每页显示 
                                            <select name="pageSize" id="selectPageSize" onchange="changePageSize($('#selectPageSize option:selected').val())" >
                                                <option value="1" <s:property value="#pageBean.pageSize==1?'selected':''"/>>1</option>
                                                <option value="2" <s:property value="#pageBean.pageSize==2?'selected':''"/>>2</option>
                                                <option value="3" <s:property value="#pageBean.pageSize==3?'selected':''"/>>3</option>
                                                <option value="4" <s:property value="#pageBean.pageSize==4?'selected':''"/>>4</option>
                                                <option value="5" <s:property value="#pageBean.pageSize==5?'selected':''"/>>5</option>
                                            </select> 条 
                                            [<A href="javaScript:void(0)"
                                                onclick="changePage(<s:property value='#pageBean.currentPage-1' />)">前一页</A>]
                                            <%-- <B>${page}</B> --%>
                                            [<A href="javaScript:void(0)"
                                                onclick="changePage(<s:property value='#pageBean.currentPage+1' />)">后一页</A>]
                                            到 <input type="text" size="3" id="page" name="page"
                                                value="<s:property value='#pageBean.currentPage'/>" /> 页 <input
                                                type="button" value="Go"
                                                onclick="changePage($('#page').val())" />
                                        </DIV>
                                </SPAN></TD>
                            </TR>
                        </TBODY>
                    </TABLE>
                </TD>
                <TD width=15
                    background="${pageContext.request.contextPath }/images/new_023.jpg"><IMG
                    src="${pageContext.request.contextPath }/images/new_023.jpg"
                    border=0></TD>
            </TR>
        </TBODY>
    </TABLE>
    <TABLE cellSpacing=0 cellPadding=0 width="98%" border=0>
        <TBODY>
            <TR>
                <TD width=15><IMG
                    src="${pageContext.request.contextPath }/images/new_024.jpg"
                    border=0></TD>
                <TD align=middle width="100%"
                    background="${pageContext.request.contextPath }/images/new_025.jpg"
                    height=15></TD>
                <TD width=15><IMG
                    src="${pageContext.request.contextPath }/images/new_026.jpg"
                    border=0></TD>
            </TR>
        </TBODY>
    </TABLE>
</BODY>
</HTML>