近日学习Easyui，发现非常好用，界面很美观。将学习的心得在此写下，这篇博客写SSh结合Easyui实现Datagrid的分页显示，其他的例如添加、修改、删除、批量删除等功能将在后面的博客一一写来。

     首先看一下要实现的效果：当每页显示5行数据：

          当每页显示10行数据，效果如下：

具体步骤：

1、下载Easyui，并搭建环境。可参照博客 http://blog.csdn.net/lhq13400526230/article/details/9148299

2、搭建SSH工程，整个工程的目录结构如图所示：

3、在Oracle数据库中创建表Student。并且输入下面6行数据，因为添加操作还没有实现，所以先在数据库表中添加数据。默认设定的值是每行5个数据，所以请至少输入6行数据，便于分页的测试。

4、web.xml的配置

<?xml version="1.0" encoding="UTF-8"?>  <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">     <!-- Sttuts2过滤器 -->   <filter>    <filter-name>struts2</filter-name>    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>   </filter>   <filter-mapping>    <filter-name>struts2</filter-name>    <url-pattern>/*</url-pattern>   </filter-mapping>     <!-- 监听器Spring -->   <listener>    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>   </listener>     <!-- 定位applicationContext.xml的物理位置 -->   <context-param>    <param-name>contextConfigLocation</param-name>    <param-value>classpath:applicationContext.xml</param-value>   </context-param>    </web-app>

5、applicationContext.xml的配置

<?xml version="1.0" encoding="UTF-8"?>  <beans xmlns="http://www.springframework.org/schema/beans"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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-2.5.xsd             http://www.springframework.org/schema/context             http://www.springframework.org/schema/context/spring-context-2.5.xsd             http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd             http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">        <import resource="applicationContext_bean.xml"/>  <import resource="applicationContext_db.xml"/>  </beans>

6、在com.model中创建模型类Student.java

package com.model;    public class Student {   String studentid;// 主键   String name;// 姓名   String gender;// 性别   String age;// 年龄     public String getStudentid() {    return studentid;   }     public void setStudentid(String studentid) {    this.studentid = studentid;   }     public String getName() {    return name;   }     public void setName(String name) {    this.name = name;   }     public String getGender() {    return gender;   }     public void setGender(String gender) {    this.gender = gender;   }     public String getAge() {    return age;   }     public void setAge(String age) {    this.age = age;   }    }

7、根据Student.java生成对应的映射文件Student.hbm.xml

<?xml version="1.0"?>  <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"  "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">  <!-- Generated 2013-6-23 23:31:47 by Hibernate Tools 3.4.0.CR1 -->  <hibernate-mapping>      <class name="com.model.Student" table="STUDENT">          <id name="studentid" type="java.lang.String">              <column name="STUDENTID" />              <generator class="assigned" />          </id>          <property name="name" type="java.lang.String">              <column name="NAME" />          </property>          <property name="gender" type="java.lang.String">              <column name="GENDER" />          </property>          <property name="age" type="java.lang.String">              <column name="AGE" />          </property>      </class>  </hibernate-mapping>

8、编写接口StudentService.java

package com.service;    import java.util.List;    public interface StudentService {    public List getStudentList(String page,String rows) throws Exception;//根据第几页获取，每页几行获取数据     public int getStudentTotal() throws Exception;//统计一共有多少数据  }

9、编写接口的实现类StudentServiceImpl.java

package com.serviceImpl;    import java.util.List;    import org.hibernate.SessionFactory;    import com.service.StudentService;    public class StudentServiceImpl implements StudentService {   private SessionFactory sessionFactory;      // 根据第几页获取，每页几行获取数据   public List getStudentList(String page, String rows) {              //当为缺省值的时候进行赋值    int currentpage = Integer.parseInt((page == null || page == "0") ? "1": page);//第几页    int pagesize = Integer.parseInt((rows == null || rows == "0") ? "10": rows);//每页多少行        List list = this.sessionFactory.getCurrentSession().createQuery("from Student")             .setFirstResult((currentpage - 1) * pagesize).setMaxResults(pagesize).list();      return list;   }     // 统计一共有多少数据   public int getStudentTotal() throws Exception {    return this.sessionFactory.getCurrentSession().find("from Student").size();   }      public SessionFactory getSessionFactory() {    return sessionFactory;   }     public void setSessionFactory(SessionFactory sessionFactory) {    this.sessionFactory = sessionFactory;   }        }

10、配置连接数据库的配置文件applicationContext_db.xml

<?xml version="1.0" encoding="UTF-8"?>  <beans xmlns="http://www.springframework.org/schema/beans"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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-2.5.xsd             http://www.springframework.org/schema/context             http://www.springframework.org/schema/context/spring-context-2.5.xsd             http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd             http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">       <!-- 用Bean定义数据源 -->   <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"    destroy-method="close">    <!-- 定义数据库驱动 -->    <property name="driverClass">     <value>oracle.jdbc.driver.OracleDriver</value>    </property>    <!-- 定义数据库URL -->    <property name="jdbcUrl">     <value>jdbc:oracle:thin:@localhost:1521:orcl</value>    </property>    <!-- 定义数据库的用户名 -->    <property name="user">     <value>lhq</value>    </property>    <!-- 定义数据库的密码 -->    <property name="password">     <value>lhq</value>    </property>    <property name="minPoolSize">     <value>1</value>    </property>    <property name="maxPoolSize">     <value>40</value>    </property>    <property name="maxIdleTime">     <value>1800</value>    </property>    <property name="acquireIncrement">     <value>2</value>    </property>    <property name="maxStatements">     <value>0</value>    </property>    <property name="initialPoolSize">     <value>2</value>    </property>    <property name="idleConnectionTestPeriod">     <value>1800</value>    </property>    <property name="acquireRetryAttempts">     <value>30</value>    </property>    <property name="breakAfterAcquireFailure">     <value>true</value>    </property>    <property name="testConnectionOnCheckout">     <value>false</value>    </property>     </bean>     <!--定义Hibernate的SessionFactory -->   <bean id="sessionFactory"    class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">    <!-- 定义SessionFactory必须注入dataSource -->    <property name="dataSource">     <ref bean="dataSource" />    </property>    <!-- 定义Hibernate的SessionFactory属性 -->    <property name="hibernateProperties">     <props>      <prop key="hibernate.dialect">       org.hibernate.dialect.Oracle10gDialect      </prop>     </props>    </property>      <!-- 定义POJO的映射文件 -->    <property name="mappingResources">     <list>      <value>com/model/Student.hbm.xml</value>     </list>    </property>   </bean>     <!-- 配置事务拦截器 -->   <bean id="transactionManager"    class="org.springframework.orm.hibernate3.HibernateTransactionManager">    <property name="sessionFactory" ref="sessionFactory" />   </bean>     <tx:advice id="txAdvice" transaction-manager="transactionManager">    <tx:attributes>     <tx:method name="save*" propagation="REQUIRED" /><!-- 只有一save、delete、update开头的方法才能执行增删改操作 -->     <tx:method name="delete*" propagation="REQUIRED" />     <tx:method name="update*" propagation="REQUIRED" />     <tx:method name="*" propagation="SUPPORTS" read-only="true" /><!-- 其他方法为只读方法 -->    </tx:attributes>   </tx:advice>     <aop:config>    <aop:pointcut id="interceptorPointCuts" expression="execution(* com.serviceImpl..*.*(..))" />  <!-- 对应实现类接口的包的位置 -->    <aop:advisor advice-ref="txAdvice" pointcut-ref="interceptorPointCuts" />   </aop:config>    </beans>

11、在控制层编写StudentAction.java类型

package com.action;    import java.util.List;    import javax.servlet.http.HttpServletRequest;  import javax.servlet.http.HttpServletResponse;    import net.sf.json.JSONObject;    import org.apache.log4j.Logger;  import org.apache.struts2.ServletActionContext;    import com.service.StudentService;    public class StudentAction {   static Logger log = Logger.getLogger(StudentAction.class);   private JSONObject jsonObj;   private String rows;// 每页显示的记录数   private String page;// 当前第几页   private StudentService student_services;//String依赖注入      //查询出所有学生信息   public String getAllStudent() throws Exception {    log.info("查询出所有学生信息");          List list = student_services.getStudentList(page, rows);    this.toBeJson(list,student_services.getStudentTotal());      return null;   }      //转化为Json格式      public void toBeJson(List list,int total) throws Exception{     HttpServletResponse response = ServletActionContext.getResponse();     HttpServletRequest request = ServletActionContext.getRequest();          JSONObject jobj = new JSONObject();//new一个JSON     jobj.accumulate("total",total );//total代表一共有多少数据     jobj.accumulate("rows", list);//row是代表显示的页的数据       response.setCharacterEncoding("utf-8");//指定为utf-8     response.getWriter().write(jobj.toString());//转化为JSOn格式          log.info(jobj.toString());      }           public StudentService getStudent_services() {    return student_services;   }     public void setStudent_services(StudentService student_services) {    this.student_services = student_services;   }     public void setJsonObj(JSONObject jsonObj) {    this.jsonObj = jsonObj;   }     public void setRows(String rows) {    this.rows = rows;   }     public void setPage(String page) {    this.page = page;   }                 }

12、编写Spring的依赖注入applicationContext_bean.xml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" 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-2.5.xsd             http://www.springframework.org/schema/context             http://www.springframework.org/schema/context/spring-context-2.5.xsd             http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd             http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">      <!-- 业务层Service -->   <bean id="student_service" class="com.serviceImpl.StudentServiceImpl">      <property name="sessionFactory">      <ref bean="sessionFactory"></ref>    </property>   </bean>     <!-- 控制层Action -->   <bean id="student_action" class="com.action.StudentAction">    <property name="student_services">      <ref bean="student_service" />    </property>   </bean>     </beans>

13、编写struts.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>  <!DOCTYPE struts PUBLIC   "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"   "http://struts.apache.org/dtds/struts-2.0.dtd">  <struts>   <package name="Easyui" extends="json-default">    <!-- 学生信息 -->    <action name="getAllStudentAction" class="student_action" method="getAllStudent">     <result type="json"> </result>    </action>   </package>  </struts>

14、编写JSP----index.jsp

<%@ page language="java" pageEncoding="utf-8" isELIgnored="false"%>  <%   String path = request.getContextPath();  %>  <%@ 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>  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">  <title>数字框</title>  <!-- 引入Jquery -->  <script type="text/javascript" src="<%=path%>/js/easyui/jquery-1.8.0.min.js" charset="utf-8"></script>  <!-- 引入Jquery_easyui -->  <script type="text/javascript" src="<%=path%>/js/easyui/jquery.easyui.min.js" charset="utf-8"></script>  <!-- 引入easyUi国际化--中文 -->  <script type="text/javascript" src="<%=path%>/js/easyui/locale/easyui-lang-zh_CN.js" charset="utf-8"></script>  <!-- 引入easyUi默认的CSS格式--蓝色 -->  <link rel="stylesheet" type="text/css" href="<%=path%>/js/easyui/themes/default/easyui.css" />  <!-- 引入easyUi小图标 -->  <link rel="stylesheet" type="text/css" href="<%=path%>/js/easyui/themes/icon.css" />    <script type="text/javascript">   $(function() {    $('#mydatagrid').datagrid({     title : 'datagrid实例',     iconCls : 'icon-ok',     width : 600,     pageSize : 5,//默认选择的分页是每页5行数据     pageList : [ 5, 10, 15, 20 ],//可以选择的分页集合     nowrap : true,//设置为true，当数据长度超出列宽时将会自动截取     striped : true,//设置为true将交替显示行背景。     collapsible : true,//显示可折叠按钮     toolbar:"#tb",//在添加 增添、删除、修改操作的按钮要用到这个     url:'getAllStudentAction.action',//url调用Action方法     loadMsg : '数据装载中......',     singleSelect:true,//为true时只能选择单行     fitColumns:true,//允许表格自动缩放，以适应父容器     //sortName : 'xh',//当数据表格初始化时以哪一列来排序     //sortOrder : 'desc',//定义排序顺序，可以是'asc'或者'desc'（正序或者倒序）。     remoteSort : false,       frozenColumns : [ [ {      field : 'ck',      checkbox : true     } ] ],      pagination : true,//分页     rownumbers : true//行数    });        });     </script>     </head>  <body>   <h2>    <b>easyui的DataGrid实例</b>   </h2>     <table id="mydatagrid">      <thead>      <tr>      <th data-options="field:'studentid',width:100,align:'center'">学生学号</th>      <th data-options="field:'name',width:100,align:'center'">姓名</th>      <th data-options="field:'gender',width:100,align:'center'">性别</th>      <th data-options="field:'age',width:100,align:'center'">年龄</th>     </tr>    </thead>   </table>       </body>  </html>

15、启动程序，输入http://localhost:8080/easyui/index.jsp进行测试

来自：http://blog.csdn.net/lhq13400526230/article/details/9158111