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实例：SSh结合Easyui实现Datagrid的分页显示

2017年04月17日 ⁄ 综合 ⁄ 共 12494字 ⁄ 字号 小 中 大 ⁄ 评论关闭

      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

 

 

 

 

 

 

 

 

 

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