案例49-crm练习获取客户列表带有分页和筛选功能
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案例49-crm练习获取客户列表带有分页和筛选功能
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1 案例分析
2 書寫步驟
1.封裝PageBean
2.書寫Action
3.書寫Service
4.書寫Dao?? 注意清空之前設置的聚合函數? dc.setProjection(null);
5.完成strutx以及spring的配置
6.書寫前臺list.jsp頁面
3 代碼實現
1 封裝PageBean
package www.test.utils;import java.util.List;public class PageBean {//當前頁private Integer currentPage;//當前頁顯示的條數private Integer pageSize;//總頁數private Integer totalPage;//總記錄數private Integer totalCount;//分頁列表的數據private List list;public PageBean(Integer currentPage, Integer pageSize, Integer totalCount) {this.currentPage = currentPage;this.pageSize = pageSize;this.totalCount = totalCount;//如果沒有指定顯示那一頁，就顯示第一頁。if (this.currentPage == null) {this.currentPage = 1;}//如果沒有指定每頁顯示幾條數據，就默認顯示3條。if (this.pageSize == null) {this.pageSize = 3;}//計算總頁數this.totalPage = (this.totalCount + this.pageSize - 1) / this.pageSize;//this.totalPage = (int) Math.ceil((this.totalCount*1.0)/this.pageSize);//判斷當前頁數是否超出范圍//不能小于1if (this.currentPage < 1) {this.currentPage = 1;}//不能大于總頁數if (this.currentPage > this.totalPage) {this.currentPage = this.totalPage;}}//計算起始索引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.書寫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;//獲取客戶列表public String list() throws Exception {//封裝離線查詢對象DetachedCriteria dc = DetachedCriteria.forClass(Customer.class);//判斷并封裝參數if(StringUtils.isNotBlank(customer.getCust_name())){dc.add(Restrictions.like("cust_name", "%"+customer.getCust_name()+"%"));}//1 調用Service查詢分頁數據(PageBean)PageBean pb = cs.getPageBean(dc,currentPage,pageSize);//2 將PageBean放入request域,轉發到列表頁面顯示ActionContext.getContext().put("pageBean", pb);return "list";}@Overridepublic 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.書寫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;@Overridepublic PageBean getPageBean(DetachedCriteria dc, Integer currentPage, Integer pageSize) {// 1 調用dao層查詢總記錄數Integer totalCount = cd.getTotalCount(dc);// 2創建pageBean對象PageBean pb = new PageBean(currentPage, pageSize, totalCount);// 3查詢客戶列表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.書寫Dao
package www.test.dao;import java.util.List;import org.hibernate.criterion.DetachedCriteria;import www.test.domain.Customer;public interface CustomerDao {//查詢總記錄數 Integer getTotalCount(DetachedCriteria dc);//根據條件查詢客戶列表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{@Overridepublic Integer getTotalCount(DetachedCriteria dc) {//設置查詢聚合函數，總記錄數 dc.setProjection(Projections.rowCount());List<Long> list = (List<Long>) super.getHibernateTemplate().findByCriteria(dc);//清空之前設置的聚合函數dc.setProjection(null);if(list!=null&&list.size()>0){Long count = list.get(0);return count.intValue();}else{return null;}}@Overridepublic 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 將action的創建交給spring容器 struts.objectFactory.spring.autoWire = name spring負責裝配Action依賴屬性--><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 讀取database.properties文件 --><context:property-placeholder location="classpath:database.properties"/><!--6 準備druid連接池 --><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 核心事務管理器 依賴于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 配置將通知織入目標對象 配置切點+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 將SessionFactory配置到spring容器中 --><!-- 加載配置方案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> --><!-- 加載配置方案2:在spring配置中放置hibernate配置信息 --><bean name="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"><!-- 將連接池注入到sessionFactory, hibernate會通過連接池獲得連接 --><property name="dataSource" ref="dataSource"></property><!-- 配置hibernate基本信息 --><property name="hibernateProperties"><props><!-- 必選配置 --><!-- <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><!-- 可選配置 --><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元數據,指定orm元數據所在的包路徑,spring會自動讀取包中的所有配置 --><property name="mappingDirectoryLocations" value="classpath:www/test/domain"></property></bean></beans>6.書寫前臺list.jsp頁面
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<%@ 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>客戶列表</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 將頁碼的值放入對應表單隱藏域中 $("#currentPageInput").val(pageNum);//2提交表達 $("#pageForm").submit();}function changePageSize(pageSize){//alert(pageSize); //1 將頁碼的值放入對應表單隱藏域中 $("#pageSizeInput").val(pageSize);//2提交表達 $("#pageForm").submit();} </SCRIPT><META content="MSHTML 6.00.2900.3492" name=GENERATOR> </HEAD> <BODY><TABLE cellSpacing=0 cellPadding=0 width="98%" border=0><TBODY><TR><TD width=15><IMGsrc="${pageContext.request.contextPath }/images/new_019.jpg"border=0></TD><TD width="100%"background="${pageContext.request.contextPath }/images/new_020.jpg"height=20></TD><TD width=15><IMGsrc="${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=${pageContext.request.contextPath }/images/new_022.jpg><IMGsrc="${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>當前位置：客戶管理 > 客戶列表</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="${pageContext.request.contextPath }/CustomerAction_list"method=post><!-- 隱藏域 用于傳遞當前頁面 --><input type="hidden" name="currentPage" id="currentPageInput"value="<s:property value="#pageBean.currentPage"/>"><!-- 隱藏域 用于傳遞每頁顯示的條數 --><input type="hidden" name="pageSize" id="pageSizeInput"value="<s:property value="#pageBean.pageSize"/>"><TABLE cellSpacing=0 cellPadding=2 border=0><TBODY><TR><TD>客戶名稱：</TD><TD><INPUT class=textbox id=sChannel2style="WIDTH: 80px" maxLength=50 name="cust_name"value="${param.cust_name}"></TD><TD><INPUT class=button id=sButton2 type=submitvalue=" 篩選 " name=sButton2></TD></TR></TBODY></TABLE></FORM></TD></TR><TR><TD><TABLE id=gridstyle="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><TRstyle="FONT-WEIGHT: bold; FONT-STYLE: normal; BACKGROUND-COLOR: #eeeeee; TEXT-DECORATION: none"><TD>客戶名稱</TD><TD>客戶級別</TD><TD>客戶來源</TD><TD>聯系人</TD><TD>電話</TD><TD>手機</TD><TD>操作</TD></TR><s:iterator value="#pageBean.list" var="cust"><TRstyle="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><ahref="${pageContext.request.contextPath }/customerServlet?method=edit&custId=${customer.cust_id}">修改</a> <ahref="${pageContext.request.contextPath }/customerServlet?method=delete&custId=${customer.cust_id}">刪除</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}">刪除</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=${customer.cust_id}">刪除</a></TD></TR></c:forEach> --%></TBODY></TABLE></TD></TR><TR><TD><SPAN id=pagelink><DIVstyle="LINE-HEIGHT: 20px; HEIGHT: 20px; TEXT-ALIGN: right">共[<B><s:property value="#pageBean.totalCount" /></B>]條記 錄,[<B><s:property value="#pageBean.currentPage" /></B>]頁 ,每頁顯示 <select name="pageSize" id="selectPageSize" onchange="changePageSize($('#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> 條 [<A href="javaScript:void(0)"onclick="changePage(<s:property value='#pageBean.currentPage-1' />)">前一頁</A>]<%-- <B>${page}</B> --%>[<A href="javaScript:void(0)"onclick="changePage(<s:property value='#pageBean.currentPage+1' />)">后一頁</A>]到 <input type="text" size="3" id="page" name="page"value="<s:property value='#pageBean.currentPage'/>" /> 頁 <inputtype="button" value="Go"onclick="changePage($('#page').val())" /></DIV></SPAN></TD></TR></TBODY></TABLE></TD><TD width=15background="${pageContext.request.contextPath }/images/new_023.jpg"><IMGsrc="${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><IMGsrc="${pageContext.request.contextPath }/images/new_024.jpg"border=0></TD><TD align=middle width="100%"background="${pageContext.request.contextPath }/images/new_025.jpg"height=15></TD><TD width=15><IMGsrc="${pageContext.request.contextPath }/images/new_026.jpg"border=0></TD></TR></TBODY></TABLE> </BODY> </HTML>?
轉載于:https://www.cnblogs.com/jepson6669/p/8592835.html
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