SSh结合Easyui实现Datagrid的分页显示

前端技术 2023/09/01 Java

      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。

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。

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持phpstudy。

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