SSH Java 后台开发框架

基于SSH框架的后台开发流程

Posted by Johnnwen on May 18, 2016

代码框架图

SSHStructure

基本开发流程

1.加入Spring

1）加入jar包
2）配置web.xml文件
3)加入Spring配置文件

2.加入Hibernate

1）同时建立持久化类，和其对应的.hbm.xml文件，生成对应的数据表

2） Spring整合Hibernate

	a)加入jar包
	b)在类路径下加入Hibernate.cfg.xml文件，在其中配置Hibernate的基本属性
	c)建立持久化类和其对应的.hbm.xml文件
	d)和Spring进行整合
		i）加入 从c3p0和MySql的驱动
		ii)在Spring的配置文件中配置：数据源，SessionFactory，声明式事务
	e)启动项目，会看到生成的数据包

3.加入Struts2

1) 加入jar包,   如果有重复的jar包，则删除版本低的
2) 在web.xml文件中配置Struts2 的Filter
3) 加入Struts2的配置文件
4) 整合Spring
	a)加入Struts2的Spring插件的jar包
	b)在spring的配置文件中正常配置Action，注意Action的Scope为prototype（非单例）
	c)在Struts2的配置文件中配置Action时，class属性指向该Action在IOC中id

4.完成功能

1. 获取所有的员工信息：如果在DAO中只查询Employee的信息，而且Employee和Department还是使用的懒加载:

	页面上还需要显示员工信息，此时会出现懒加载异常，代理对象不能被初始化:org.hibernate.LazyInitializationException

解决方案：

	a)  打开懒加载：不推荐使用，增加了sql查询语句
		<many-to-one name="department" class="com.wyw.shh.entities.Department" lazy="false">
	   	<column name="DEPARTMENT_ID" />
		</many-to-one>
	b)获取Employee时使用迫切左外连接同时初始化关联的Department对象
		FROM Employee e LEFT OUTER JOIN FETCH e.department
	c)使用OpenSessionInFilter:在页面加载完开Session

2.删除员工信息：

	a) 正常删除，返回值是redirect类型，而且重定向到emp-list
	b) 确定要删除吗？的提示使用jQuery完成
	c)Ajax的使用参见struts-2.3.15.3/docs/WW/docs/ajax.html
	
3.添加员工
	a)显示表单页面，需要先查询所有的部门信息
	b)显示使用struts2的ModelDriven和Preparable拦截器（点击提交的时候把表单封装成一个对象）
	c)时间是一个字符串，需要转为一个Data类型的对象

核心代码

配置文件
  1. applicationContext.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:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">

	<!-- 导入资源文件-->
	<context:property-placeholder location="classpath:db.properties"/>
	
	<!-- 配置c3p0数据源 -->
	
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="user" value="${jdbc.user}"></property>
		<property name="password" value="${jdbc.password}"></property>
		<property name="driverClass" value="${jdbc.driverClass}"></property>
		<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
		
		<property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
		<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
	</bean>

	<!-- 配置SessionFactory -->
	<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
		<property name="mappingLocations" value="classpath:com/wyw/shh/entities/*hbm.xml"></property>
	</bean>
	
	<!-- 配置Spring的声明式事务 -->
	<!-- 1.配置Hibernate的事务管理器 -->
	
	<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>
	
	
	<!-- 2.配置事务属性 -->
	<tx:advice id="txAdvie" transaction-manager="transactionManager">
		<tx:attributes>
			<tx:method name="get*" read-only="true"/>
			<tx:method name="LastNameIsValid" read-only="true"/>
			<tx:method name="*"/>
		</tx:attributes>
	</tx:advice>
	
	<!-- 3.配置事务切入点，再把事务属性和事务切入点关联起来 -->
	<aop:config>
		
		<aop:pointcut expression="execution(* com.wyw.ssh.service.*.*(..))" id="txPointcut"/>
		<aop:advisor advice-ref="txAdvie" pointcut-ref="txPointcut"/>
	</aop:config>
</beans>
  1. applicationContext-beans.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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
	
	
	<bean id="employeeDao" class="com.wyw.ssh.dao.EmployeeDao">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>
	
	<bean id="employeeService" class="com.wyw.ssh.service.EmployeeService">
		<property name="employeeDao" ref="employeeDao"></property>
	</bean>
	
	
	<bean id="departmentDao" class="com.wyw.ssh.dao.DepartmentDao">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>
	
	<bean id="departmentServie" class="com.wyw.ssh.service.DepartmentServie">
		<property name="departmentDao" ref="departmentDao"></property>
	</bean>
	
	<bean id="employeeAction" class="com.wyw.shh.actions.EmployeeAction"
		scope="protoatype">
		<property name="employeeService" ref="employeeService"></property>
		<property name="departmentServie" ref="departmentServie"></property>
	</bean>

</beans>
  1. hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
		"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
		"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
    
    <!-- 配置Hibernate的基本属性 -->
    
    <!-- 方言 -->
    
    <property name="hibernate.dialect" >org.hibernate.dialect.MySQL5InnoDBDialect</property>
    
    <!-- 是否显示及格式化SQL -->
    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.format_sql">true</property>
    
    <!-- 生成数据表的策略 -->
    <property name="hibernate.hbm2ddl.auto">update</property>
    
    <!-- 二级缓存 -->
    
    </session-factory>
</hibernate-configuration>
  1. struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
	<constant name="struts.devMode" value="false" />  
	
	<constant name="struts.action.extension" value="action,do,html,"></constant>
	
	<constant name="struts.ognl.allowStaticMethodAccess" value="true"></constant>
	
	<constant name="struts.ui.theme" value="xhtml"></constant>

	<!-- 
		package:组织模块
		name:用于其他包应用当前包
		extends：当前包继承的包
	 -->
	<package name="product" extends="struts-default" namespace="/">
	
		<!-- 定义新的拦截器栈，配置prepare拦截器栈的参数值alwaysInvokePrepare为false -->
	
		<interceptors>
			<interceptor-stack name="sshStack">
				<interceptor-ref name="paramsPrepareParamsStack">
					<param name="prepare.alwaysInvokePrepare">false</param>
				</interceptor-ref>
			</interceptor-stack>
		</interceptors>
		
		<!-- 使用新的拦截器栈 -->
		<default-interceptor-ref name="sshStack"></default-interceptor-ref>
		
		<!-- 配置一个action -->
		
		<action name="test" class="com.wyw.shh.actions.EmployeeAction"
			method="test">
			<result name="test">/WEB-INF/views/success.jsp</result>
		</action>
		
		

		
		<action name="emp-*" class="com.wyw.shh.actions.EmployeeAction"
			method="{1}">
			<result name="{1}">/WEB-INF/views/emp-{1}.jsp</result>
			<result type="stream" name="ajax-success">
		        <param name="contentType">text/html</param>
		        <param name="inputName">inputStream</param>
		    </result>
			<!--<result name="success" type="redirect">/emp-list</result>-->
			<result name="success" type="redirect">/emp-list</result>
		</action>
	</package>
  
</struts>
  1. xwork-conversion.properties
java.util.Date=com.wyw.shh.converters.SSHDateConverters
  1. java.util.Date=com.wyw.shh.converters.SSHDateConverters
jdbc.user=root
jdbc.password=root
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql:///spring

jdbc.initPoolSize=5
jdbc.maxPoolSize=10
  1. web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	id="WebApp_ID" version="3.0">
	
	
	<!-- needed for ContextLoaderListener -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext*.xml</param-value>
	</context-param>

	<!-- Bootstraps the root web application context before servlet initialization -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	 <!-- 配置Struts2的Filter -->
	<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>
    
    
     <welcome-file-list>
        <welcome-file>/WEB-INF/views/index.jsp</welcome-file>
    </welcome-file-list>
	

</web-app>
持久化类
  1. com.wyw.shh.entities

（1）Department.java

package com.wyw.shh.entities;

public class Department {

	private Integer id;

	private String departmentName;

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getDepartmentName() {
		return departmentName;
	}

	public void setDepartmentName(String departmentName) {
		this.departmentName = departmentName;
	}

	

}

(2) Employee.java

package com.wyw.shh.entities;

import java.util.Date;

public class Employee {

	private Integer id;
	//不能被修改
	private String lastName;
	private String email;

	//从前端传入的是String类型，需要类型转化
	private Date birth;
	
	//不能被修改
	private Date createTime;
	
	//单项n-1的关联关系
	private Department department;

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public Date getBirth() {
		return birth;
	}

	public void setBirth(Date birth) {
		this.birth = birth;
	}

	public Date getCreateTime() {
		return createTime;
	}

	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}

	public Department getDepartment() {
		return department;
	}

	public void setDepartment(Department department) {
		this.department = department;
	}

	@Override
	public String toString() {
		return "Employee [id=" + id + ", lastName=" + lastName + ", email=" + email + ", birth=" + birth
				+ ", createTime=" + createTime + ", department=" + department + "]";
	}
	
	

}
  1. com.wyw.ssh.dao

(1) BaseDao.java

package com.wyw.ssh.dao;

import org.hibernate.Session;
import org.hibernate.SessionFactory;

public class BaseDao {
	private SessionFactory sessionFactory;
	public void setSessionFactory(SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
	}
	
	public Session getSession(){
		return this.sessionFactory.getCurrentSession();
	}

}

(2) DepartmentDao.java

package com.wyw.ssh.dao;

import java.util.List;

import com.wyw.shh.entities.Department;

public class DepartmentDao extends BaseDao{
	
	public List<Department> getAll(){
		String hql = "FROM Department";
		return getSession().createQuery(hql).list();
	}

}

(3) EmployeeDao.java

package com.wyw.ssh.dao;

import java.util.List;

import org.hibernate.Query;

import com.wyw.shh.entities.Employee;

public class EmployeeDao extends BaseDao{
	public List<Employee> getAll(){
		
		String hql = "FROM Employee e LEFT OUTER JOIN FETCH e.department";
		return getSession().createQuery(hql).list();
	}
	
	public void delete(Integer id){
		String hql = "DELETE FROM Employee e WHERE e.id = ?";
		
		getSession().createQuery(hql).setInteger(0, id).executeUpdate();
	}
	
	public void saveOrUpdate(Employee employee){
		getSession().saveOrUpdate(employee);
	}
	
	public Employee getEmployeeByLastName(String lastName){
		
		String hql = "FROM Employee e WHERE e.lastName = ?";
		
		Query query = getSession().createQuery(hql).setString(0, lastName);
		
		return (Employee)query.uniqueResult();
		
	}
	
	public Employee get(Integer id){
		return (Employee) getSession().get(Employee.class, id);
		
	}
}
  1. com.wyw.ssh.service

(1) DepartmentServie.java

package com.wyw.ssh.service;

import java.util.List;

import com.wyw.shh.entities.Department;
import com.wyw.ssh.dao.DepartmentDao;

public class DepartmentServie {
	
	private DepartmentDao departmentDao;
	public void setDepartmentDao(DepartmentDao departmentDao) {
		this.departmentDao = departmentDao;
	}
	
	public List<Department> getAll(){
		return departmentDao.getAll();
	}

}

(2) EmployeeService.java

package com.wyw.ssh.service;

import java.util.List;

import com.wyw.shh.entities.Employee;
import com.wyw.ssh.dao.EmployeeDao;

public class EmployeeService {
	
	private EmployeeDao employeeDao;
	
	public void setEmployeeDao(EmployeeDao employeeDao) {
		this.employeeDao = employeeDao;
	}
	
	public List<Employee> getAll(){
		
		List<Employee> employees = employeeDao.getAll();
		
		//employees.clear();
		return employees;
	}
	
	public void delete(Integer id){
		employeeDao.delete(id);
	}
	
	public void saveOrUpdate(Employee employee){
		employeeDao.saveOrUpdate(employee);
	}
	
	public boolean LastNameIsValid(String lastName){
		return employeeDao.getEmployeeByLastName(lastName) == null;
	}
	
	public Employee get(Integer id){
		return employeeDao.get(id);
	}

}
  1. com.wyw.shh.actions

(1) EmployeeAction.java

package com.wyw.shh.actions;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Map;

import org.apache.struts2.interceptor.RequestAware;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.opensymphony.xwork2.Preparable;
import com.wyw.shh.entities.Employee;
import com.wyw.ssh.service.DepartmentServie;
import com.wyw.ssh.service.EmployeeService;


public class EmployeeAction extends ActionSupport implements RequestAware,
	ModelDriven<Employee>,Preparable{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	private EmployeeService employeeService;
	
	public void setEmployeeService(EmployeeService employeeService) {
		this.employeeService = employeeService;
	}
	
	private DepartmentServie departmentServie;
	public void setDepartmentServie(DepartmentServie departmentServie) {
		this.departmentServie = departmentServie;
	}
	
	public String list(){
		
		request.put("employees", employeeService.getAll());
		return "list";
	}
	
	private Integer id;
	
	public void setId(Integer id) {
		this.id = id;
	}
	
	
	private InputStream inputStream;
    public InputStream getInputStream() {
        return inputStream;
    }
    
	public String delete(){
		try {
			employeeService.delete(id);
			inputStream = new ByteArrayInputStream("1".getBytes("UTF-8"));
		} catch (Exception e) {
			try {
				inputStream = new ByteArrayInputStream("0".getBytes("UTF-8"));
			} catch (UnsupportedEncodingException e1) {
				e1.printStackTrace();
			}
			e.printStackTrace();
		}
		return "ajax-success";
	}
	
	public String input(){
		request.put("departments", departmentServie.getAll());
		return "input";
	}
	
	public void prepareInput(){
		if(id != null){
			model = employeeService.get(id);
		}
	}
	
	public String save(){
		
		if(id == null){
			model.setCreateTime(new Date());		
		}
		employeeService.saveOrUpdate(model);
		//System.err.println(model);
		return SUCCESS;
	}
	
	public void prepareSave(){
		if(id == null){
			model = new Employee();			
		}else{
			model = employeeService.get(id);
		}
	}

	private String lastName;
	
	public void setLastName(String lastName) {
		this.lastName = lastName;
	}
	public String validateLastName() throws UnsupportedEncodingException{
		if(employeeService.LastNameIsValid(lastName)){
			inputStream = new ByteArrayInputStream("1".getBytes("UTF-8"));
		}else{
			inputStream = new ByteArrayInputStream("0".getBytes("UTF-8"));
			
		}
		return "ajax-success";
	}
	
	private Map<String, Object> request;
	@Override
	public void setRequest(Map<String, Object> arg0) {
		this.request = arg0;
		
	}
	
	
	public String test(){
		
		System.out.println("test.....");
		return "test";
	}

	@Override
	public void prepare() throws Exception {
		
		
	}

	private Employee model;
	@Override
	public Employee getModel() {
		
		return model;
	}
	
	public Employee get(Integer id){
		return employeeService.get(id);
	}

}
  1. com.wyw.shh.converters

(1) SSHDateConverters.java

package com.wyw.shh.converters;

import java.util.Date;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Map;

import org.apache.struts2.util.StrutsTypeConverter;

public class SSHDateConverters extends StrutsTypeConverter{

	private DateFormat dateFormate;
	
	{
		dateFormate = new SimpleDateFormat("yyyy-MM-dd");
	}
	
	@Override
	public Object convertFromString(Map arg0, String[] arg1, Class arg2) {
		if(arg2 == Date.class){
			try {
				return dateFormate.parse(arg1[0]);
			} catch (ParseException e) {
				e.printStackTrace();
			}
		}
		return null;
	}

	@Override
	public String convertToString(Map arg0, Object arg1) {
		if(arg1 instanceof Date){
			return dateFormate.format((Date)arg1);
		}
		return null;
	}

}
JSP文件
  1. emp-input.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    
<%@ 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>Insert title here</title>
<script type="text/javascript" src="scripts/jquery-2.2.3.min.js"></script>

<script type="text/javascript">

	$(function() {
		$(":input[name=lastName]").change(function() {
			var val = $(this).val();
			val = $.trim(val);
			var $this = $(this);
			if(val != ""){
				//把当前节点后面的所有的font兄弟节点清除
				
				$this.nextAll("font").remove();
				var url = "emp-validateLastName";
				var args = {"lastName":val,"time":new Date()};
				$.post(url,args,function(data){
					//表示可用
					if(data == "1"){
						$this.after("<font color='green'>LastName可用!</font>")
					//表示不可用
					}else if(data == "0"){
						$this.after("<font color='red'>LastName不可用!</font>")
						
					//服务器错误
					}else{
						alert("服务器错误")
					}
				});
				
			}else{
				alert("lastName不能为空");
			}
		});
	})

</script>
</head>
<body>
	<h4>Employee Input Page</h4>
	
	<s:form action="emp-save" method="post">
		<s:if test="id != null">
			<s:textfield name="lastName" label="LastName" disabled="true" > </s:textfield>
			<s:hidden name="id"></s:hidden>
			<%--
			<!--通过添加隐藏域的方式把未显式提交的字段值提交到服务器-->
			<s:hidden name="lastName"></s:hidden>
			<s:hidden name="createTime"></s:hidden>
			 --%>
		</s:if>
		<s:else>
			<s:textfield name="lastName" label="LastName"> </s:textfield>
		</s:else>
		<s:textfield name="email" label="Email"> </s:textfield>
		<s:textfield name="birth" label="Birth"> </s:textfield>
		
		<s:select list="#request.departments"
			listKey="id" listValue="departmentName" name="department.id"
			label="Department"></s:select>
			
		<s:submit></s:submit>	
	</s:form>
</body>
</html>
  1. emp-list.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    
<%@ 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>Insert title here</title>

<script type="text/javascript" src="scripts/jquery-2.2.3.min.js"></script>
<script type="text/javascript">
	$(function(){
		//1.点击的delete时，弹出确定是要删除信息吗？若确定则执行删除，否则取消
		$(".delete").click(function() {
			//取消超链接的默认行为
			
			var lastName = $(this).next(":input").val();
			var flag = confirm("确定要删除" + lastName + " 的信息吗？");
			
			if (flag) {
				var $tr = $(this).parent().parent();
				//删除，使用ajax方式
				var url = this.href;
				var args = {"time":new Date()}
				$.post(url,args,function(data){
					//如果data的返回值为1，则提示删除成功，且把当前行删除
					if(data == 1){
						alert("删除成功");
						$tr.remove();
					}else{
						//否则，则提示删除失败
						alert("删除失败");
					}
					
				});
			}
			return false;
		})
		
	})
</script>
</head>
<body>

	<h4>Employee List Page</h4>
	
	<s:if test="#request.employees == null || #request.employees.size() == 0">
		没有任何员工信息
	</s:if>
	<s:else>
		<table border="1" cellpadding="1" cellspacing="0">
			<tr>
				<td>ID</td>
				<td>LASTNAME</td>
				<td>EMAIL</td>
				<td>BIRTH</td>
				<td>CREATETIME</td>
				<td>DEPT</td>
				<td>DELETE</td>
				<td>EDITE</td>
				
			</tr>
			
			<s:iterator value="#request.employees">
				<tr>
					<td>${id }</td>
					<td>${lastName }</td>
					<td>${email  }</td>
					<td>
						<s:date name="birth" format="yyyy-MM-dd"/>
					</td>
					<td>
						<s:date name="createTime" format="yyyy-MM-dd hh:mm:ss"/>
					</td>
					<td>${department.departmentName }</td>
					<td>
						<a href="emp-delete?id=${id }" class="delete">Delete</a>
						<input type="hidden" value="${lastName }"/>
					</td>
					<td>
						<a href="emp-input?id=${id }">Edite</a>
	
					</td>
				</tr>
					
			</s:iterator>
		</table>
	</s:else>

</body>
</html>
  1. index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    
<%@ 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>Insert title here</title>
</head>
<body>
	<a href="test">test</a>
	<br><br>
	<a href="emp-list">All Employees</a>
	<br><br>
	<a href="emp-input">Add New Employee</a>
</body>
</html>
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