实例：SSh结合Easyui实现Datagrid的分页显示

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">


     <filter>
         <filter-name>struts2filter-name>
         <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilterfilter-class>
     filter>
     <filter-mapping>
         <filter-name>struts2filter-name>
         <url-pattern>/*url-pattern>
     filter-mapping>


     <listener>
         <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
     listener>


     <context-param>
         <param-name>contextConfigLocationparam-name>
         <param-value>classpath:applicationContext.xmlparam-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"?>

 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

 <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">



     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
         destroy-method="close">

         <property name="driverClass">
             <value>oracle.jdbc.driver.OracleDrivervalue>
         property>

         <property name="jdbcUrl">
             <value>jdbc:oracle:thin:@localhost:1521:orclvalue>
         property>

         <property name="user">
             <value>lhqvalue>
         property>

         <property name="password">
             <value>lhqvalue>
         property>
         <property name="minPoolSize">
             <value>1value>
         property>
         <property name="maxPoolSize">
             <value>40value>
         property>
         <property name="maxIdleTime">
             <value>1800value>
         property>
         <property name="acquireIncrement">
             <value>2value>
         property>
         <property name="maxStatements">
             <value>0value>
         property>
         <property name="initialPoolSize">
             <value>2value>
         property>
         <property name="idleConnectionTestPeriod">
             <value>1800value>
         property>
         <property name="acquireRetryAttempts">
             <value>30value>
         property>
         <property name="breakAfterAcquireFailure">
             <value>truevalue>
         property>
         <property name="testConnectionOnCheckout">
             <value>falsevalue>
         property>

     bean>


     <bean id="sessionFactory"
         class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

         <property name="dataSource">
             <ref bean="dataSource" />
         property>

         <property name="hibernateProperties">
             <props>
                 <prop key="hibernate.dialect">
                     org.hibernate.dialect.Oracle10gDialect
                 prop>
             props>
         property>


         <property name="mappingResources">
             <list>
                 <value>com/model/Student.hbm.xmlvalue>
             list>
         property>
     bean>


     <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" />
             <tx:method name="delete*" propagation="REQUIRED" />
             <tx:method name="update*" propagation="REQUIRED" />
             <tx:method name="*" propagation="SUPPORTS" read-only="true" />
         tx:attributes>
     tx:advice>

     <aop:config>
         <aop:pointcut id="interceptorPointCuts"  expression="execution(* com.serviceImpl..*.*(..))" />
         <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">


     <bean id="student_service" class="com.serviceImpl.StudentServiceImpl">
         <property name="sessionFactory">
              <ref bean="sessionFactory">ref>
         property>
     bean>


     <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"?>

 "-//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">

         <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"%>
 >
 <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>数字框title>

 <script type="text/javascript"   src="<%=path%>/js/easyui/jquery-1.8.0.min.js" charset="utf-8">script>

 <script type="text/javascript"   src="<%=path%>/js/easyui/jquery.easyui.min.js" charset="utf-8">script>

 <script type="text/javascript"   src="<%=path%>/js/easyui/locale/easyui-lang-zh_CN.js" charset="utf-8">script>

 <link rel="stylesheet" type="text/css"   href="<%=path%>/js/easyui/themes/default/easyui.css" />

 <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

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