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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