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后面的博客一一寫來。
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，并搭建環境。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。并且輸入下面6行數據，因為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，便于分頁的測試。
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) {
//當為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" /><!-- 其他方法為只讀方法 -->
</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;
}
//轉化為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");//指定為utf-8
response.getWriter().write(jobj.toString());//轉化為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,//設置為true，當數據長度超出列寬時將會自動截取
striped : true,//設置為true將交替顯示行背景。
collapsible : true,//顯示可折疊按鈕
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,//為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、啟動程序，輸入http://localhost:8080/easyui/index.jsp進行測試
來自：http://blog.csdn.net/lhq13400526230/article/details/9158111
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