Struts+Spring+Hibernate真正入门级实例

最新推荐文章于 2024-09-05 10:44:33 发布

daryl715

最新推荐文章于 2024-09-05 10:44:33 发布

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分类专栏：经验技巧之Project 文章标签： hibernate struts spring import action bean

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本文介绍了一个基于Struts+Spring+Hibernate（SSH）架构的简单CRUD操作示例，涵盖了人员信息的增删改查等功能，适用于初学者快速入门。

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网上有很多关于SSH架构的实例文章，但都显得复杂，我想，入门的朋友，还是希望从最简单的CRUD操作开始，一些复杂的数据库关系，逻辑关系，以后在项目中就能碰到，所以，本文定位于从零开始的一个SSH架构的例子，功能很简单，就是完成一个人员的CRUD操作，麻雀虽小，五脏俱全，希望能对从来没有接触过三者结合开发的朋友带来一点点帮助，这个例子，也算是我的入门实例，从此，开始Struts+Spring+Hibernate之旅

开发工具：MyEclipse5.1+Tomcat+Mysql

开发前准备：数据库安装，tomcat安装，下载jar包这些就不费口水了，直接切入正题吧
CREATE TABLE `people` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(100) default NULL,
`location` varchar(100) default NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=gb2312 ROW_FORMAT=COMPRESSED;

首先，建立工程和package,以下是我的工程目录
action
      DeletePeopleAction.java     //删除人员action
      EditPeopleAction.java         //编辑人员action第一步，读取需要修改的人员资料
      EditPeopleActionDo.java   //修改人员action
      ListPeopleAction.javaSave   //显示人员列表action
      SavePeopleAction.java         //新增人员action
      SearchPeopleAction.java     //查找人员action
dao
      IDAO.java    //数据库操作接口
      StudentDAOImpl.java  //数据库操作实现
domain
      AbstractPeople.java   //实体抽象类
      People.hbm.xml         //数据库映射
      People.java                 //实体类
service
      IService.java   //服务层接口
      StudentManagerImpl.java   //服务层实现
util
     Character.java   //字符编码过滤器
     PageSupport.java   //分页
applicationContext_hibernate.xml   //Spring配置文件（hibernate部分）
applicationContext_service.xml      //Spring配置文件(Service部分)

JSP：这几个jsp从名字就能看出功能，不说了
   addStudent.jsp
   editStudent.jsp
   searchList.jsp
   searchStudent.jsp
   studentList.jsp

代码：

applicationContext_hibernate.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

<!--

<value>java:comp/env/jdbc/StudentManager</value>

</property>

</bean>

-->

<value>com.mysql.jdbc.Driver</value>

</property>

<value>jdbc:mysql://localhost:3306/studentmanager</value>

</property>

</property>

</property>

</bean>

</property>

</bean>

<bean id="sessionFactory"

class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

</property>

<props>

org.hibernate.dialect.MySQLDialect

</prop>

org.hibernate.cache.HashtableCacheProvider

</prop>

</props>

</property>

<!--

<list>

<value>classpath:/domain</value>

</list>

</property>-->

<list>

<value>domain/People.hbm.xml</value>

</list>

</property>

</bean>

</property>

</bean>

</beans>

applicationContext_service.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

</property>

</bean>

</property>

</property>

</bean>

</property>

<props>

<prop key="save*">PROPAGATION_REQUIRED</prop>

<prop key="list*">PROPAGATION_REQUIRED,readOnly</prop>

<prop key="delete*">PROPAGATION_REQUIRED</prop>

<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>

<prop key="edit*">PROPAGATION_REQUIRED</prop>

<prop key="search*">PROPAGATION_REQUIRED</prop>

</props>

</property>

</property>

</bean>

</beans>

Web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>

/WEB-INF/classes/applicationContext_service.xml,

/WEB-INF/classes/applicationContext_hibernate.xml

</param-value>

</context-param>

<resource-ref>

<description>SqlServer Datasource example</description>

<res-ref-name>jdbc/StudentManager</res-ref-name>

<res-type>javax.sql.DataSource</res-type>

<res-auth>Container</res-auth>

</resource-ref>

<filter-name>hibernateFilter</filter-name>

<filter-class>

org.springframework.orm.hibernate3.support.OpenSessionInViewFilter

</filter-class>

<init-param>

<param-name>singleSession</param-name>

<param-value>true</param-value>

</init-param>

</filter>

<filter-mapping>

<filter-name>hibernateFilter</filter-name>

<url-pattern>*.do</url-pattern>

</filter-mapping>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

<servlet-name>action</servlet-name>

<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>

<init-param>

<param-name>config</param-name>

<param-value>/WEB-INF/struts-config.xml</param-value>

</init-param>

<init-param>

<param-name>debug</param-name>

<param-value>3</param-value>

</init-param>

<init-param>

<param-name>detail</param-name>

<param-value>3</param-value>

</init-param>

<load-on-startup>0</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>action</servlet-name>

<url-pattern>*.do</url-pattern>

</servlet-mapping>

</web-app>

struts-config.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>

<data-sources />

<form-beans>

<form-bean name="people" type="domain.People"></form-bean>

</form-beans>

<global-exceptions />

<global-forwards />

<action-mappings >

</action>

</action>

</action>

</action>

</action>

</action>

</action-mappings>

<controller contentType="text/html;charset=gb2312"

processorClass="util.Character" />

<message-resources parameter="" />

</struts-config>

DeletePeopleAction.java

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package action;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.springframework.web.struts.ActionSupport;

import service.StudentManagerImpl;

import domain.People;

/**

* MyEclipse Struts

* Creation date: 01-17-2007

* XDoclet definition:

* @struts.action validate="true"

public class DeletePeopleAction extends ActionSupport {

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

Integer id=new Integer(request.getParameter("id"));

StudentManagerImpl manager=(StudentManagerImpl)getWebApplicationContext().getBean("studentManager");

manager.deletePeople(id);

List studentList=manager.listPeople(0,5,"from People");

request.setAttribute("studentList", studentList);

request.setAttribute("currentPage", 1);

return mapping.findForward("success");

}

EditPeopleAction.java

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package action;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.springframework.web.struts.ActionSupport;

import service.StudentManagerImpl;

import domain.People;

/**

* MyEclipse Struts

* Creation date: 01-17-2007

* XDoclet definition:

* @struts.action validate="true"

public class EditPeopleAction extends ActionSupport {

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

String id=request.getParameter("id");

StudentManagerImpl manager=(StudentManagerImpl)getWebApplicationContext().getBean("studentManager");

People people=(People)manager.getPeople(new Integer(id));

request.setAttribute("id", id);

request.setAttribute("name", people.getName());

request.setAttribute("location", people.getLocation());

return mapping.findForward("success");

}

EditPeopleActionDo.java

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package action;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.springframework.web.struts.ActionSupport;

import service.StudentManagerImpl;

import domain.People;

/**

* MyEclipse Struts

* Creation date: 01-17-2007

* XDoclet definition:

* @struts.action validate="true"

public class EditPeopleActionDo extends ActionSupport {

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

People people=(People)form;

StudentManagerImpl manager=(StudentManagerImpl)getWebApplicationContext().getBean("studentManager");

People sPeople=(People)manager.getPeople(new Integer(people.getId()));

sPeople.setName(people.getName());

sPeople.setLocation(people.getLocation());

manager.editPeople(sPeople);

List studentList=manager.listPeople(0,5,"from People");

request.setAttribute("studentList", studentList);

request.setAttribute("currentPage", 1);

return mapping.findForward("success");

}

ListPeopleAction.java

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package action;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.springframework.web.struts.ActionSupport;

import service.StudentManagerImpl;

import util.PageSupport;

/**

* MyEclipse Struts

* Creation date: 01-17-2007

* XDoclet definition:

* @struts.action validate="true"

public class ListPeopleAction extends ActionSupport {

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

String page=request.getParameter("page");

int firstRow=0;

int lastRow=0;

StudentManagerImpl manager=(StudentManagerImpl)getWebApplicationContext().getBean("studentManager");

PageSupport sPage=new PageSupport(page);

sPage.setPagetotal(manager.listPeople().size());

firstRow=sPage.calcFirstPage();

lastRow=sPage.calcLastPage();

List studentList=manager.listPeople(firstRow-1,lastRow,"from People");

request.setAttribute("studentList", studentList);

request.setAttribute("currentPage", sPage.getThispage());

return mapping.findForward("success");

}

SavePeopleAction.java

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package action;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.springframework.web.struts.ActionSupport;

import service.StudentManagerImpl;

import domain.People;

/**

* MyEclipse Struts

* Creation date: 01-17-2007

* XDoclet definition:

* @struts.action validate="true"

public class SavePeopleAction extends ActionSupport {

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

People people=(People)form;

StudentManagerImpl manager=(StudentManagerImpl)getWebApplicationContext().getBean("studentManager");

manager.savePeople(people);

return mapping.findForward("success");

}

SearchPeopleAction.java

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package action;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.springframework.web.struts.ActionSupport;

import service.StudentManagerImpl;

import util.PageSupport;

import domain.People;

/**

* MyEclipse Struts

* Creation date: 01-17-2007

* XDoclet definition:

* @struts.action validate="true"

public class SearchPeopleAction extends ActionSupport {

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

People people=(People)form;

String page=request.getParameter("page");

int firstRow=0;

int lastRow=0;

String name=people.getName();

String location=people.getLocation();

String hql="from People where name="+name+" and location="+location;

StudentManagerImpl manager=(StudentManagerImpl)getWebApplicationContext().getBean("studentManager");

PageSupport sPage=new PageSupport(page);

sPage.setPagetotal(manager.searchPeople(hql).size());

firstRow=sPage.calcFirstPage();

lastRow=sPage.calcLastPage();

List studentList=manager.searchPeople(firstRow-1, lastRow, hql);

request.setAttribute("studentList", studentList);

request.setAttribute("currentPage", sPage.getThispage());

return mapping.findForward("success");

}

IDAO.java

package dao;

import java.util.List;

import org.hibernate.criterion.DetachedCriteria;

public interface IDAO {

public void save(Object obj);

public List list(final int firstRow,final int lastRow,final String hql);

public List list();

public void delete(Object obj);

public Object getPeople(Integer id);

public void editPeople(Object obj);

public List searchPeople(final int firstRow,final int lastRow,final String hql);

public List searchPeople(final String sql);

}

StudentDAOImpl.java

package dao;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;

import org.hibernate.Criteria;

import org.hibernate.HibernateException;

import org.hibernate.Query;

import org.hibernate.Session;

import org.hibernate.criterion.DetachedCriteria;

import org.springframework.orm.hibernate3.HibernateCallback;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import domain.People;

public class StudentDAOImpl extends HibernateDaoSupport implements IDAO {

public List searchPeople(final int firstRow,final int lastRow,final String hql){

return getHibernateTemplate().executeFind(new HibernateCallback() {

public Object doInHibernate(Session s) throws HibernateException, SQLException {

Query query = s.createQuery(hql);

query.setFirstResult(firstRow);

query.setMaxResults(lastRow);

List list = query.list();

return list;

}

});

}

public List searchPeople(final String hql){

return getHibernateTemplate().executeFind(new HibernateCallback() {

public Object doInHibernate(Session s) throws HibernateException, SQLException {

Query query = s.createQuery(hql);

List list = query.list();

return list;

}

});

}

public void save(Object obj) {

if(obj instanceof People){

People people=(People)obj;

try{

getHibernateTemplate().save(people);

}catch(Exception e){

e.printStackTrace();

}

public List list(){

return getHibernateTemplate().find("from People");

}

public List list(final int firstRow,final int lastRow,final String hql){

return getHibernateTemplate().executeFind(new HibernateCallback() {

public Object doInHibernate(Session s) throws HibernateException, SQLException {

Query query = s.createQuery(hql);

query.setFirstResult(firstRow);

query.setMaxResults(lastRow);

List list = query.list();

return list;

}

});

}

public void editPeople(Object obj){

if(obj instanceof People){

People people=(People)obj;

try{

getHibernateTemplate().saveOrUpdate(people);

}catch(Exception e){

e.printStackTrace();

}

public Object getPeople(Integer id){

return getHibernateTemplate().get(People.class, id);

}

public void delete(Object obj){

if(obj instanceof People){

getHibernateTemplate().delete((People)obj);

}

AbstractPeople.java

package domain;

import org.apache.struts.action.ActionForm;

public abstract class AbstractPeople extends ActionForm implements java.io.Serializable {

// Fields

private Integer id;

private String name;

private String location;

// Constructors

/** default constructor */

public AbstractPeople() {

}

/** full constructor */

public AbstractPeople(String name, String location) {

this.name = name;

this.location = location;

}

// Property accessors

public Integer getId() {

return this.id;

}

public void setId(Integer id) {

this.id = id;

}

public String getName() {

return this.name;

}

public void setName(String name) {

this.name = name;

}

public String getLocation() {

return this.location;

}

public void setLocation(String location) {

this.location = location;

}

People.hbm.xml

<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<!--

Mapping file autogenerated by MyEclipse - Hibernate Tools

-->

<hibernate-mapping package="domain">

</id>

</property>

</property>

</class>

</hibernate-mapping>

People.java

package domain;

/**

* People generated by MyEclipse - Hibernate Tools

public class People extends AbstractPeople implements java.io.Serializable {

// Constructors

/** default constructor */

public People() {

}

/** full constructor */

public People(String name, String location) {

super(name, location);

}

IService.java

package service;

import java.util.List;

public interface IService {

public void savePeople(Object obj);

public List listPeople(int firstRow,int lastRow,String hql);

public List listPeople();

public void deletePeople(Integer id);

public Object getPeople(Integer id);

public void editPeople(Object obj);

public List searchPeople(String hql);

public List searchPeople(int firstRow,int lastRow,String hql);

}

StudentManagerImpl.java

package service;

import java.util.ArrayList;

import java.util.List;

import dao.IDAO;

import domain.People;

public class StudentManagerImpl implements IService {

private IDAO studentDAO;

public void savePeople(Object obj) {

if(obj instanceof People){

People people=(People)obj;

studentDAO.save(people);

}

public List searchPeople(String hql){

return studentDAO.searchPeople(hql);

}

public List searchPeople(int firstRow,int lastRow,String hql){

return studentDAO.searchPeople(firstRow, lastRow, hql);

}

public List listPeople(int firstRow,int lastRow,String hql){

List peopleList=new ArrayList();

peopleList=studentDAO.list(firstRow,lastRow,hql);

return peopleList;

}

public List listPeople(){

return studentDAO.list();

}

public void editPeople(Object obj){

if(obj instanceof People){

People people=(People)obj;

studentDAO.editPeople(people);

}

public Object getPeople(Integer id){

return studentDAO.getPeople(id);

}

public void deletePeople(Integer id){

studentDAO.delete(this.getPeople(id));

}

public IDAO getStudentDAO() {

return studentDAO;

}

public void setStudentDAO(IDAO studentDAO) {

this.studentDAO = studentDAO;

}

Character.java

package util;

import java.io.IOException;

import java.io.UnsupportedEncodingException;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.action.RequestProcessor;

public class Character extends RequestProcessor{

protected boolean processRoles(HttpServletRequest request,

HttpServletResponse response, ActionMapping mapping)

throws IOException, ServletException {

return super.processRoles(request, response, mapping);

}

protected void processContent(HttpServletRequest request,

HttpServletResponse response) {

try {

request.setCharacterEncoding("gb2312");

System.out.println(request.getCharacterEncoding());

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

}

super.processContent(request, response);

}

PageSupport.java

package util;

public class PageSupport {

int thispage = 0;// 当前页数

int pagesize = 5;// 每页最大记录数

int firstpage = 0;// 记录开始的位置

int lastpage = 0;// 记录结束的位置

int pagetotal = 0;// 总记录数

int pagenums = 0;// 总页数

public PageSupport(String page){

if(page==null||page.equals("")){

thispage=1;

}

else{

thispage=Integer.parseInt(page);

}

public int calcFirstPage(){

pagenums = pagetotal / pagesize;

if (pagetotal % pagesize != 0){

pagenums = pagenums + 1;

}

if (thispage > pagenums)

thispage = pagenums;

else if(thispage<=0){

thispage=1;

}

if(thispage<=1){

firstpage=1;

}

else{

firstpage = (thispage-1) * pagesize+1;

}

return this.firstpage;

}

public int calcLastPage(){

return this.pagesize;

}

public int getFirstpage() {

return firstpage;

}

public void setFirstpage(int firstpage) {

this.firstpage = firstpage;

}

public int getLastpage() {

return lastpage;

}

public void setLastpage(int lastpage) {

this.lastpage = lastpage;

}

public int getPagenums() {

return pagenums;

}

public void setPagenums(int pagenums) {

this.pagenums = pagenums;

}

public int getPagesize() {

return pagesize;

}

public void setPagesize(int pagesize) {

this.pagesize = pagesize;

}

public int getPagetotal() {

return pagetotal;

}

public void setPagetotal(int pagetotal) {

this.pagetotal = pagetotal;

}

public int getThispage() {

return thispage;

}

public void setThispage(int thispage) {

this.thispage = thispage;

}

addStudent.jsp

<%@ page language="java" contentType="text/html;charset=gb2312"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

</head>

<body>

姓名:<input type="text" name="name"/><br>

籍贯:<input type="text" name="location"/><br>

</form>

</body>

</html>

editStudent.jsp

<%@ page language="java" contentType="text/html;charset=gb2312"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

</head>

<body>

姓名:<input type="text" name="name" value="<%=request.getAttribute("name") %>"/><br>

籍贯:<input type="text" name="location" value="<%=request.getAttribute("location") %>"/><br>

</form>

</body>

</html>

searchList.jsp

<%@ page language="java" contentType="text/html;charset=gb2312"%>

<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>

<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>

<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

int previousPage=((Integer)request.getAttribute("currentPage")).intValue()-1;

int nextPage=((Integer)request.getAttribute("currentPage")).intValue()+1;

</head>

<body>

<tr>

</tr>

<logic:present name="studentList" scope="request">

<logic:iterate id="student" name="studentList">

<tr>

</tr>

</logic:iterate>

</logic:present>

</table>

</body>

</html>

searchStudent.jsp

<%@ page language="java" contentType="text/html;charset=gb2312"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

</head>

<body>

输入查询条件：

姓名:<input type="text" name="name"/><br>

籍贯:<input type="text" name="location"/><br>

</form>

</body>

</html>

studentList.jsp

<%@ page language="java" contentType="text/html;charset=gb2312"%>

<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>

<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>

<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

int previousPage=((Integer)request.getAttribute("currentPage")).intValue()-1;

int nextPage=((Integer)request.getAttribute("currentPage")).intValue()+1;

</head>

<body>

<tr>

</tr>

<logic:present name="studentList" scope="request">

<logic:iterate id="student" name="studentList">

<tr>

</tr>

</logic:iterate>

</logic:present>

</table>

</body>

</html>