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实例:SSh结合Easyui实现Datagrid的分页显示(JAVA版)
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=http://www.mamicode.com/"<%=path%>/js/easyui/jquery-1.8.0.min.js" charset="utf-8"></script>
- <!-- 引入Jquery_easyui -->
- <script type="text/javascript" src=http://www.mamicode.com/"<%=path%>/js/easyui/jquery.easyui.min.js" charset="utf-8"></script>
- <!-- 引入easyUi国际化--中文 -->
- <script type="text/javascript" src=http://www.mamicode.com/"<%=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=http://www.mamicode.com/"<%=path%>/js/easyui/themes/default/easyui.css" />
- <!-- 引入easyUi小图标 -->
- <link rel="stylesheet" type="text/css" href=http://www.mamicode.com/"<%=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
实例:SSh结合Easyui实现Datagrid的分页显示(JAVA版)