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 > 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>
<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>
<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=${customer.cust_id}">修改</a>
<a href="${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>
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