SSH分页小结

DAO:spring hibernateTemplate

been的xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
    Mapping file autogenerated by MyEclipse - Hibernate Tools
-->
<hibernate-mapping>
<!-- 此处的catalog="test"属性要删掉,不然会报sql语法错误 -->
    <class name="com.forlink.been.User" table="user" >
        <id name="id" type="integer">
            <column name="id" />
            <generator class="native" />
        </id>
        <property name="userName" type="string">
            <column name="userName" length="50" not-null="true"/>
        </property>
        <property name="passWord" type="string">
            <column name="passWord" length="50" />
        </property>
         <property name="email" type="string">
            <column name="email" length="50"  />
        </property>
         <property name="address" type="string">
            <column name="address" length="50"  />
        </property>
         <property name="cellPhone" type="string">
            <column name="cellPhone" length="50"  />
        </property>
    </class>
</hibernate-mapping>

 

 

hibernate.cfg.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-configuration PUBLIC
 "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
 <property name="show_sql">true</property>
 <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
 <property name="connection.url">jdbc:mysql://localhost:3306/ww</property>
 <property name="connection.username">root</property>
 <property name="connection.password">***</property>
 <property name="connection.isolation">2</property>
 <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
 <!--  <property name="hibernate.hbm2ddl.auto">create</property> -->

 
 
 
 
<property name="connection.autocommit">true</property>
 <property name="myeclipse.connection.profile">
  com.mysql.jdbc.Driver
 </property>

 <mapping resource="com/been/user.hbm.xml" />

</session-factory>
</hibernate-configuration>

 

 

 

public class DaoImpl extends HibernateDaoSupport implements Dao
{public List findPageByQuery(final String queryString,
   final Object[] parameters, final PageInfo pageInfo)
 {
  return (List) getHibernateTemplate().execute(new HibernateCallback()//这里使用了匿名内部类
  {
   public Object doInHibernate(Session session)//Spring进行事务维护 省去每次创建session和关闭session
     throws HibernateException
   {
    Query query = session.createQuery(queryString);
    if (parameters != null)
    {
     for (int i = 0; i < parameters.length; i++)
     {
      query.setParameter(i, parameters[i]);
     }
    }
    ScrollableResults sr = query.scroll();
    sr.last();
    int totalCount = sr.getRowNumber();
    int startIndex = (pageInfo.getPageIndex() - 1)
      * pageInfo.getPageSize();
    query.setMaxResults(pageInfo.getPageSize());
    query.setFirstResult(startIndex);
    int totalRec = totalCount + 1;
    pageInfo.setTotalRec(totalRec);
    int totalPage = (totalRec % pageInfo.getPageSize() == 0) ? (totalRec / pageInfo
      .getPageSize())
      : (totalRec / pageInfo.getPageSize()) + 1;
    int[] pageNumbers = new int[totalPage];
    for (int i = 0; i < totalPage; i++)
    {
     pageNumbers[i] = (i + 1);
    }
    pageInfo.setPageNumbers(pageNumbers);
    pageInfo.setTotalPage(totalPage);
    pageInfo.setPageSize(pageInfo.getPageSize());
    pageInfo.setPageIndex(pageInfo.getPageIndex());
    pageInfo.setPrePage(pageInfo.getPageIndex() - 1);
    pageInfo.setNextPage(pageInfo.getPageIndex() + 1);
    return query.list();
   }
  }, true);
 }
 
 
 }
 
 使用参数说明：
 
final String queryString 查询的语句 from aaa as y where y.id=?

final Object[] parameters 参数数组

final PageInfo pageInfo 这个是分页的类

比如： from AAA as t where t.id=? and t.name=?

object[]a={1,haha}

 //Object[] a ={s};
  List li = new ArrayList();
  li = di.findPageByQuery("from User as user", null, fi);
  // li = di.findPageByQuery("from User a", a, fi);
  
  
  
  
  
  
 service：spring依赖注入
 
spring配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
 <bean id="mySessionFactory"
  class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  <property name="configLocation"
   value="classpath:hibernate.cfg.xml" />
 </bean>

 <bean id="myTransactionManager"
  class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory">
   <ref bean="mySessionFactory" />
  </property>
 </bean>
 <bean id="userDao" class="com.forlink.dao.UserDaoImpl">
  <property name="sessionFactory">
   <ref bean="mySessionFactory" />
  </property>
 </bean>
 <bean id="dao" class="com.forlink.dao.DaoImpl">
  <property name="sessionFactory">
   <ref bean="mySessionFactory" />
  </property>
 </bean>

 <bean id="userService" class="com.forlink.services.UserServiceImpl"
  abstract="false" lazy-init="default" autowire="default"
  dependency-check="default">
  <property name="userDaoImpl">
   <ref bean="userDao" />
  </property>
 </bean>
 
 <bean id="PageService" class="com.forlink.services.PageService"
  abstract="false" lazy-init="default" autowire="default"
  dependency-check="default">
  <property name="dao">
   <ref bean="dao" />
  </property>
 </bean>

 <bean name="/login" class="com.forlink.struts.UserLogin">
  <property name="userServiceImpl">
   <ref bean="userService" />
  </property>
 </bean>
 
  <bean name="/page" class="com.forlink.struts.PageAction">
  <property name="ps">
   <ref bean="PageService" />
  </property>
 </bean>

 
 <!--<bean id="userService2"
  class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
  <property name="transactionManager">
   <ref bean="myTransactionManager" />
  </property>
  <property name="target">
   <ref bean="userService" />
  </property>
  <property name="transactionAttributes">
   <props>
    <prop key="*">PROPAGATION_REQUIRED</prop>
   </props>
  </property>
 </bean>
-->

</beans>
 
public class PageService
{

 public Dao dao;

 /*
  * public List getUU(String mobile, PageInfo pageInfo) throws Exception {
  * List list = null; if (pageInfo == null) pageInfo = new PageInfo(); try {
  * list = dao .findPageByQuery( "from uuuu u where c.mobile=? and
  * c.sendtype=1 and c.groupType=1 order by c.sendTime desc", new Object[] {
  * mobile }, pageInfo); } catch (DataAccessException ex) {
  * ex.printStackTrace(); } return list;
  */
 public List getUU(PageInfo pageInfo) throws Exception
 {
  /*ApplicationContext context = new ClassPathXmlApplicationContext(
    "applicationContext.xml");
  dao = (DaoImpl) context.getBean("Dao");
  System.out.print(dao);*/  //自己测试时候可以使用
  List list = null;
  if (pageInfo == null)
   pageInfo = new PageInfo();
  try
  {
   list = dao.findPageByQuery("from User u", null, pageInfo);
  } catch (DataAccessException ex)
  {
   ex.printStackTrace();
  }
  return list;
 }

struts ：action

public class PageAction extends Action

{
 public PageService ps;

 public PageInfo pageInfo=new PageInfo();

 public ActionForward execute(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response){
  System.out.println("listlistlist");
  List list = new ArrayList();
  try
  {
  //pageInfo = (PageInfo) request.getAttribute("pageInfo");
  
   String page=request.getParameter("page");
  if(page==null)
  {page="1";
  }
  
  
  System.out.println("action...........................");
  pageInfo.setPageIndex(Integer.parseInt(page)); 
  
  // pageInfo.setPageIndex(Integer.parseInt(request.getParameter("Index")));
  
  list = ps.getUU(pageInfo);
  if(list.size()!=0)
  {
  request.setAttribute("list", list);
  request.setAttribute("pageInfo", pageInfo);
  }
  }catch
  (Exception ex)
  {
   ex.printStackTrace();
  }
  return mapping.findForward("page");

 }

 public PageInfo getPageInfo()
 {
  return pageInfo;
 }

 public void setPageInfo(PageInfo pageInfo)
 {
  this.pageInfo = pageInfo;
 }

 public PageService getPs()
 {
  return ps;
 }

 public void setPs(PageService ps)
 {
  this.ps = ps;
 }

}

你可以自己写个类 把PageInfo封装进去 我做测试 懒得依赖注入

struts配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
 <data-sources />
 <form-beans>
  <form-bean name="loginForm" type="com.forlink.struts.UserForm" />

 </form-beans>

 <global-exceptions />
 <global-forwards />
 <action-mappings>
  <action path="/login" input="/login.jsp" attribute="loginForm"
   name="loginForm" scope="request" validate="true">
   <set-property property="cancellable" value="true" />
   <forward name="main" path="/main.jsp" />
  </action>
  <action path="/findLog" type="com.forlink.struts.LogAction"
   scope="request" parameter="findLog">
   <forward name="success" path="/index.jsp"></forward>
  </action>

  <action path="/page" type="com.forlink.struts.PageAction"
   scope="request" >
   <forward name="page" path="/page.jsp"></forward>
  </action>

 </action-mappings>

 <controller
  processorClass="org.springframework.web.struts.DelegatingRequestProcessor" />

 <message-resources
  parameter="com.forlink.struts.ApplicationResources" />

 <plug-in
  className="org.springframework.web.struts.ContextLoaderPlugIn">
  <set-property property="contextConfigLocation"
   value="/WEB-INF/applicationContext.xml" />
 </plug-in>

</struts-config>

 

 

xml 配置文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

 

 

view：用了el

<%@ page contentType="text/html; charset=GBK"%>
<%@ page import="java.util.*" %>
<%@ page import="com.been.User" %>
<jsp:directive.page import="com.dao.PageInfo;"/>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<body>
<%

  String nowPage ;
  int total;
  
  nowPage=request.getParameter("page");
  if(nowPage==null)
  {nowPage="1";
  }
  int curPage=Integer.parseInt(nowPage);
  if((PageInfo)request.getAttribute("pageInfo") == null){
   total = 1;
  } else {
   total = ((PageInfo)request.getAttribute("pageInfo")).getTotalPage();
  }
 
 %>

 <c:forEach var="user" items="${requestScope.list}">
     <tr>
      <td></td>
    
      <td>${user.userName }</td>
      
     </tr>
    </c:forEach>
   
    
    
     <a href="${pageContext.request.contextPath }/page.do?page=1">首页</a>&nbsp;&nbsp;|
    <a href="${pageContext.request.contextPath }/page.do?page=<%=curPage-1<0?1:curPage-1%>">上一页</a> |
    <a href="${pageContext.request.contextPath }/page.do?page=<%=(curPage)>total?total:curPage+1%>">下一页</a> |
    <a href="${pageContext.request.contextPath }/page.do?page=<%=total %>">末页</a>
    当前第<%=curPage %>页 转到第 <select id="page" onchange="window.location.href='${pageContext.request.contextPath }/page.do?page='+document.getElementById('page').value;">          <%
           for(int toPage = 1; toPage<=total; toPage++) {
          %>
            <option value = <%=toPage%>
             <%if(toPage==curPage){ %>
              selected
             <%} %>
            >
             <%=toPage %>
            </option>
          <%
           }
          %>
         </select> 页
    共<%=total%>页 ssss${pageInfo.pageIndex}     
 </body>
</html>

还有pageInfo类

 

public class PageInfo
{
private int totalPage = 1;

/**
* 前一页
*/
private int prePage = 1;

/**
* 下一页
*/
private int nextPage = 1;

/**
* 总记录数
*/
private int totalRec = 0;

/**
* 默认每页记录数
*/
private final int defaultPageSize = 10;

/**
* 每页记录数
*/
private int pageSize = defaultPageSize;

/**
* 当前页码
*/
private int pageIndex = 1;

/**
* 全部页码，从1开始
*/
private int[] pageNumbers;

public int getPageIndex() {
return pageIndex;
}

public void setPageIndex(int pageIndex) {
this.pageIndex = pageIndex > 0 ? pageIndex : 1;
}

public int getNextPage() {
return nextPage;
}

public void setNextPage(int nextPage) {
this.nextPage = nextPage > this.totalPage ? this.totalPage : nextPage;
}

public int getPageSize() {
return pageSize;
}

public void setPageSize(int pageSize) {
this.pageSize = pageSize > 0 ? pageSize : 10;
}

public int getPrePage() {
return prePage;
}

public void setPrePage(int prePage) {
this.prePage = prePage < 1 ? 1 : prePage;
}

public int getTotalPage() {
return totalPage;
}

public void setTotalPage(int totalPage) {
this.totalPage = totalPage > 0 ? totalPage : 1;
}

public int getTotalRec() {
return totalRec;
}

public void setTotalRec(int totalRec) {
this.totalRec = totalRec > -1 ? totalRec : 0;
}

public int[] getPageNumbers() {
return pageNumbers;
}

public void setPageNumbers(int[] pageNumbers) {
this.pageNumbers = pageNumbers;
}
}
虽然分页是很基础的 但自己写一遍还是需要细心 不然会很多BUG

起码需要你把环境搭建  自己没有利用pageinfo的total这些 属性 就是想页面自己写写
总结over