實例：SSh結合Easyui實現Datagrid的分頁顯示

近日學習Easyui，發現非常好用，界面很美觀。將學習的心得在此寫下，這篇博客寫SSh結合Easyui實現Datagrid的分頁顯示，其他的例如添加、修改、刪除、批量刪除等功能將在後面的博客一一寫來。

首先看一下要實現的效果：當每頁顯示5行數據：

當每頁顯示10行數據，效果如下：

具體步驟：

1、下載Easyui，並搭建環境。可參照博客 http://blog.csdn.net/lhq13400526230/article/details/9148299

2、搭建SSH工程，整個工程的目錄結構如圖所示：

3、在Oracle數據庫中創建表Student。並且輸入下面6行數據，因爲添加操作還沒有實現，所以先在數據庫表中添加數據。默認設定的值是每行5個數據，所以請至少輸入6行數據，便於分頁的測試。

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過濾器 -->
	<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>

	<!-- 監聽器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中創建模型類Student.java

package com.model;

public class Student {
	String studentid;// 主鍵
	String name;// 姓名
	String gender;// 性別
	String age;// 年齡

	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、根據Student.java生成對應的映射文件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、編寫接口StudentService.java

package com.service;

import java.util.List;

public interface StudentService {
	 public List getStudentList(String page,String rows) throws Exception;//根據第幾頁獲取，每頁幾行獲取數據 
	 public int getStudentTotal() throws Exception;//統計一共有多少數據
}

9、編寫接口的實現類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;
	
	// 根據第幾頁獲取，每頁幾行獲取數據
	public List getStudentList(String page, String rows) {
		
        //當爲缺省值的時候進行賦值
		int currentpage = Integer.parseInt((page == null || page == "0") ? "1": page);//第幾頁
		int pagesize = Integer.parseInt((rows == null || rows == "0") ? "10": rows);//每頁多少行
		
		List list = this.sessionFactory.getCurrentSession().createQuery("from Student")
				       .setFirstResult((currentpage - 1) * pagesize).setMaxResults(pagesize).list();

		return list;
	}

	// 統計一共有多少數據
	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、配置連接數據庫的配置文件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定義數據源 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">
		<!-- 定義數據庫驅動 -->
		<property name="driverClass">
			<value>oracle.jdbc.driver.OracleDriver</value>
		</property>
		<!-- 定義數據庫URL -->
		<property name="jdbcUrl">
			<value>jdbc:oracle:thin:@localhost:1521:orcl</value>
		</property>
		<!-- 定義數據庫的用戶名 -->
		<property name="user">
			<value>lhq</value>
		</property>
		<!-- 定義數據庫的密碼 -->
		<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>

	<!--定義Hibernate的SessionFactory -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<!-- 定義SessionFactory必須注入dataSource -->
		<property name="dataSource">
			<ref bean="dataSource" />
		</property>
		<!-- 定義Hibernate的SessionFactory屬性 -->
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">
					org.hibernate.dialect.Oracle10gDialect
				</prop>
			</props>
		</property>

		<!-- 定義POJO的映射文件 -->
		<property name="mappingResources">
			<list>
				<value>com/model/Student.hbm.xml</value>
			</list>
		</property>
	</bean>

	<!-- 配置事務攔截器 -->
	<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開頭的方法才能執行增刪改操作 -->
			<tx:method name="delete*" propagation="REQUIRED" />
			<tx:method name="update*" propagation="REQUIRED" />
			<tx:method name="*" propagation="SUPPORTS" read-only="true" /><!-- 其他方法爲只讀方法 -->
		</tx:attributes>
	</tx:advice>

	<aop:config>
		<aop:pointcut id="interceptorPointCuts"	expression="execution(* com.serviceImpl..*.*(..))" />  <!-- 對應實現類接口的包的位置 -->
		<aop:advisor advice-ref="txAdvice" pointcut-ref="interceptorPointCuts" />
	</aop:config>

</beans>

11、在控制層編寫StudentAction.java類型

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;// 每頁顯示的記錄數
	private String page;// 當前第幾頁
	private StudentService student_services;//String依賴注入
	
	//查詢出所有學生信息
	public String getAllStudent() throws Exception {
		log.info("查詢出所有學生信息");		
		
		List list = student_services.getStudentList(page, rows);
		this.toBeJson(list,student_services.getStudentTotal());

		return null;
	}
	
	//轉化爲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一個JSON
			jobj.accumulate("total",total );//total代表一共有多少數據
			jobj.accumulate("rows", list);//row是代表顯示的頁的數據

			response.setCharacterEncoding("utf-8");//指定爲utf-8
			response.getWriter().write(jobj.toString());//轉化爲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、編寫Spring的依賴注入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">
	
	<!-- 業務層Service -->
	<bean id="student_service" class="com.serviceImpl.StudentServiceImpl">
	  	<property name="sessionFactory">
			 <ref bean="sessionFactory"></ref>
		</property>
	</bean>

	<!-- 控制層Action -->
	<bean id="student_action" class="com.action.StudentAction">
		<property name="student_services">
			 <ref bean="student_service" />
		</property>
	</bean>
	
</beans>

13、編寫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">
		<!-- 學生信息 -->
		<action name="getAllStudentAction" class="student_action" method="getAllStudent">
			<result type="json"> </result>
		</action>
	</package>
</struts>

14、編寫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>數字框</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國際化--中文 -->
<script type="text/javascript"	src="<%=path%>/js/easyui/locale/easyui-lang-zh_CN.js"	charset="utf-8"></script>
<!-- 引入easyUi默認的CSS格式--藍色 -->
<link rel="stylesheet" type="text/css"	href="<%=path%>/js/easyui/themes/default/easyui.css" />
<!-- 引入easyUi小圖標 -->
<link rel="stylesheet" type="text/css"	href="<%=path%>/js/easyui/themes/icon.css" />

<script type="text/javascript">
	$(function() {
		$('#mydatagrid').datagrid({
			title : 'datagrid實例',
			iconCls : 'icon-ok',
			width : 600,
			pageSize : 5,//默認選擇的分頁是每頁5行數據
			pageList : [ 5, 10, 15, 20 ],//可以選擇的分頁集合
			nowrap : true,//設置爲true，當數據長度超出列寬時將會自動截取
			striped : true,//設置爲true將交替顯示行背景。
			collapsible : true,//顯示可摺疊按鈕
			toolbar:"#tb",//在添加 增添、刪除、修改操作的按鈕要用到這個
			url:'getAllStudentAction.action',//url調用Action方法
			loadMsg : '數據裝載中......',
			singleSelect:true,//爲true時只能選擇單行
			fitColumns:true,//允許表格自動縮放，以適應父容器
			//sortName : 'xh',//當數據表格初始化時以哪一列來排序
			//sortOrder : 'desc',//定義排序順序，可以是'asc'或者'desc'（正序或者倒序）。
			remoteSort : false,
 			 frozenColumns : [ [ {
				field : 'ck',
				checkbox : true
			} ] ], 
			pagination : true,//分頁
			rownumbers : true//行數
		});	
		
	});
	
</script>	

</head>
<body>
	<h2>
		<b>easyui的DataGrid實例</b>
	</h2>

	<table id="mydatagrid">
	   <thead>
	 		<tr>
				<th data-options="field:'studentid',width:100,align:'center'">學生學號</th>
				<th data-options="field:'name',width:100,align:'center'">姓名</th>
				<th data-options="field:'gender',width:100,align:'center'">性別</th>
				<th data-options="field:'age',width:100,align:'center'">年齡</th>
			</tr>
		</thead>
	</table>
   
</body>
</html>

15、啓動程序，輸入http://localhost:8080/easyui/index.jsp進行測試

實例：SSh結合Easyui實現Datagrid的分頁顯示

打開jsp頁面自動加載多個Action的實現方法

Myeclipse或Eclipse中搭建Easyui環境

利用Maven調用自己的jar包

創建手動啓動、停止Oracle的批處理命令

SSH整合Maven，Maven常引用到的Jar包

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