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>