Struts框架核心技术小小班
? 简介
? Web 开发基础
�CB/S结构程序
�C请求响应机制
�CHTML
�CServlet
�CJSP
�CWeb 服务器
? 编程思想
�C分层开发思想
�C面向接口编程思想
? 设计模式
�CDAO设计模式
�CMVC设计模式
? Web 开发基础
�CB/S结构程序
�C请求响应机制
�CHTML
�CServlet
�CJSP
�CWeb 服务器
? 编程思想
�C分层开发思想
�C面向接口编程思想
? 设计模式
�CDAO设计模式
�CMVC设计模式
----------------------------Start---------------------------------------
? 简介
�C因为Struts是Servlet+JSP的MVC解决方案，所以在学习Struts之前有必要了解如下Web开发的基础知识，使用Servlet+JSP如何编程，以及编程思想和设计模式中Web开发中应用
? 这对我们在学习Struts时是很有帮助的
? 我们要比较Servlet+JSP程序的MVC模式实现和Struts MVC的异同
? Servlet+JSP程序的弊端
? Struts的优势
? 程序开发的思想
? 设计模式的应用
�C因为Struts是Servlet+JSP的MVC解决方案，所以在学习Struts之前有必要了解如下Web开发的基础知识，使用Servlet+JSP如何编程，以及编程思想和设计模式中Web开发中应用
? 这对我们在学习Struts时是很有帮助的
? 我们要比较Servlet+JSP程序的MVC模式实现和Struts MVC的异同
? Servlet+JSP程序的弊端
? Struts的优势
? 程序开发的思想
? 设计模式的应用
? Web 开发基础
�C B/S结构程序
? B/S结果程序是指，基于Browser（浏览器）/Server（服务器）的应用程序
? 相对C/S结构程序而言，B/S结构程序有如下优点：
�C 基于网络
�C 共享性好
�C 客户端零维护
�C 请求响应机制
? B/S程序的主要特征是请求（request）响应（response）机制
? 通常使用的协议是Http协议，该协议是无状态的
�C HTML
? HTML的全称是Hyper Text Markup Language（超文本标记语言）
?基本结构是：
<HTML>
<HEAD>
<title>, <base>, <link>, <meta>
</HEAD>
<BODY>
HTML 文件的正文写在这里... ...
</BODY>
</HTML>
�C Servlet
? Servlet 是为动态创建Web工程而提供的编程接口
MyServlet.java
�C B/S结构程序
? B/S结果程序是指，基于Browser（浏览器）/Server（服务器）的应用程序
? 相对C/S结构程序而言，B/S结构程序有如下优点：
�C 基于网络
�C 共享性好
�C 客户端零维护
�C 请求响应机制
? B/S程序的主要特征是请求（request）响应（response）机制
? 通常使用的协议是Http协议，该协议是无状态的
�C HTML
? HTML的全称是Hyper Text Markup Language（超文本标记语言）
?基本结构是：
<HTML>
<HEAD>
<title>, <base>, <link>, <meta>
</HEAD>
<BODY>
HTML 文件的正文写在这里... ...
</BODY>
</HTML>
�C Servlet
? Servlet 是为动态创建Web工程而提供的编程接口
MyServlet.java
web.xml
设置servlet的申明和映射
测试：
�C JSP
? 为了解决Servlet的开发效率问题而设计的开发语言
? 底层执行还是Servlet
? 为了解决Servlet的开发效率问题而设计的开发语言
? 底层执行还是Servlet
MyJsp_jsp.java
package org.apache.jsp;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import java.util.*;
public final class MyJsp_jsp extends org.apache.jasper.runtime.HttpJspBase
implements org.apache.jasper.runtime.JspSourceDependent {
private static final JspFactory _jspxFactory = JspFactory.getDefaultFactory();
private static java.util.List _jspx_dependants;
private javax.el.ExpressionFactory _el_expressionfactory;
private org.apache.AnnotationProcessor _jsp_annotationprocessor;
public Object getDependants() {
return _jspx_dependants;
}
public void _jspInit() {
_el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory();
_jsp_annotationprocessor = (org.apache.AnnotationProcessor) getServletConfig().getServletContext().getAttribute(org.apache.AnnotationProcessor. class.getName());
}
public void _jspDestroy() {
}
public void _jspService(HttpServletRequest request, HttpServletResponse response)
throws java.io.IOException, ServletException {
PageContext pageContext = null;
HttpSession session = null;
ServletContext application = null;
ServletConfig config = null;
JspWriter out = null;
Object page = this;
JspWriter _jspx_out = null;
PageContext _jspx_page_context = null;
try {
response.setContentType( "text/html;charset=ISO-8859-1");
pageContext = _jspxFactory.getPageContext( this, request, response,
null, true, 8192, true);
_jspx_page_context = pageContext;
application = pageContext.getServletContext();
config = pageContext.getServletConfig();
session = pageContext.getSession();
out = pageContext.getOut();
_jspx_out = out;
out.write('\r');
out.write('\n');
String path = request.getContextPath();
String basePath = request.getScheme()+ "://"+request.getServerName()+":"+request.getServerPort()+path+"/";
out.write("\r\n");
out.write("\r\n");
out.write("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">\r\n");
out.write("<html>\r\n");
out.write(" <head>\r\n");
out.write(" <base href=\"");
out.print(basePath);
out.write("\">\r\n");
out.write(" \r\n");
out.write(" <title>My JSP 'MyJsp.jsp' starting page</title>\r\n");
out.write(" \r\n");
out.write("\t<meta http-equiv=\"pragma\" content=\"no-cache\">\r\n");
out.write("\t<meta http-equiv=\"cache-control\" content=\"no-cache\">\r\n");
out.write("\t<meta http-equiv=\"expires\" content=\"0\"> \r\n");
out.write("\t<meta http-equiv=\"keywords\" content=\"keyword1,keyword2,keyword3\">\r\n");
out.write("\t<meta http-equiv=\"description\" content=\"This is my page\">\r\n");
out.write("\t<!--\r\n");
out.write("\t<link rel=\"stylesheet\" type=\"text/css\" href=\"styles.css\">\r\n");
out.write("\t-->\r\n");
out.write("\r\n");
out.write(" </head>\r\n");
out.write(" \r\n");
out.write(" <body>\r\n");
out.write(" This is my JSP page. <br>\r\n");
out.write(" </body>\r\n");
out.write("</html>\r\n");
} catch (Throwable t) {
if (!(t instanceof SkipPageException)){
out = _jspx_out;
if (out != null && out.getBufferSize() != 0)
try { out.clearBuffer(); } catch (java.io.IOException e) {}
if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
}
} finally {
_jspxFactory.releasePageContext(_jspx_page_context);
}
}
}
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import java.util.*;
public final class MyJsp_jsp extends org.apache.jasper.runtime.HttpJspBase
implements org.apache.jasper.runtime.JspSourceDependent {
private static final JspFactory _jspxFactory = JspFactory.getDefaultFactory();
private static java.util.List _jspx_dependants;
private javax.el.ExpressionFactory _el_expressionfactory;
private org.apache.AnnotationProcessor _jsp_annotationprocessor;
public Object getDependants() {
return _jspx_dependants;
}
public void _jspInit() {
_el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory();
_jsp_annotationprocessor = (org.apache.AnnotationProcessor) getServletConfig().getServletContext().getAttribute(org.apache.AnnotationProcessor. class.getName());
}
public void _jspDestroy() {
}
public void _jspService(HttpServletRequest request, HttpServletResponse response)
throws java.io.IOException, ServletException {
PageContext pageContext = null;
HttpSession session = null;
ServletContext application = null;
ServletConfig config = null;
JspWriter out = null;
Object page = this;
JspWriter _jspx_out = null;
PageContext _jspx_page_context = null;
try {
response.setContentType( "text/html;charset=ISO-8859-1");
pageContext = _jspxFactory.getPageContext( this, request, response,
null, true, 8192, true);
_jspx_page_context = pageContext;
application = pageContext.getServletContext();
config = pageContext.getServletConfig();
session = pageContext.getSession();
out = pageContext.getOut();
_jspx_out = out;
out.write('\r');
out.write('\n');
String path = request.getContextPath();
String basePath = request.getScheme()+ "://"+request.getServerName()+":"+request.getServerPort()+path+"/";
out.write("\r\n");
out.write("\r\n");
out.write("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">\r\n");
out.write("<html>\r\n");
out.write(" <head>\r\n");
out.write(" <base href=\"");
out.print(basePath);
out.write("\">\r\n");
out.write(" \r\n");
out.write(" <title>My JSP 'MyJsp.jsp' starting page</title>\r\n");
out.write(" \r\n");
out.write("\t<meta http-equiv=\"pragma\" content=\"no-cache\">\r\n");
out.write("\t<meta http-equiv=\"cache-control\" content=\"no-cache\">\r\n");
out.write("\t<meta http-equiv=\"expires\" content=\"0\"> \r\n");
out.write("\t<meta http-equiv=\"keywords\" content=\"keyword1,keyword2,keyword3\">\r\n");
out.write("\t<meta http-equiv=\"description\" content=\"This is my page\">\r\n");
out.write("\t<!--\r\n");
out.write("\t<link rel=\"stylesheet\" type=\"text/css\" href=\"styles.css\">\r\n");
out.write("\t-->\r\n");
out.write("\r\n");
out.write(" </head>\r\n");
out.write(" \r\n");
out.write(" <body>\r\n");
out.write(" This is my JSP page. <br>\r\n");
out.write(" </body>\r\n");
out.write("</html>\r\n");
} catch (Throwable t) {
if (!(t instanceof SkipPageException)){
out = _jspx_out;
if (out != null && out.getBufferSize() != 0)
try { out.clearBuffer(); } catch (java.io.IOException e) {}
if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
}
} finally {
_jspxFactory.releasePageContext(_jspx_page_context);
}
}
}
�C Web 服务器
? Web工程的运行容器，如Tomcat
? 编程思想
�C分层开发思想
? 软件的层次结构可以分为四层：
�C表现层
�C控制层
�C业务逻辑层
�C数据逻辑层（持久层）
�C面向接口编程思想
? 在编程中将业务逻辑抽象出接口，以供上次调用
? 依赖抽象（接口），而非具体（接口实现）的编程思想，又称之为控制反转（Inversion of Control)
�C分层开发思想
? 软件的层次结构可以分为四层：
�C表现层
�C控制层
�C业务逻辑层
�C数据逻辑层（持久层）
�C面向接口编程思想
? 在编程中将业务逻辑抽象出接口，以供上次调用
? 依赖抽象（接口），而非具体（接口实现）的编程思想，又称之为控制反转（Inversion of Control)
? 设计模式
�CDAO设计模式
? DAO设计模式
�CDAO的全称是：Data Access Object，数据访问对象。
�C使用DAO设计模式，来封装数据库持久层的所有操作（CRUD），使低级的数据逻辑和高级的业务逻辑分离，达到解耦合的目的。
? 一个典型的DAO实现有如下的组件：
�C一个 DAO 接口
�C一个实现了 DAO 接口的具体类
�C一个 DAO 工厂类
�C数据传输对象(有时称为值对象)
?以维护一个客户信息为例，具体组件如下所示：
�CCustomerDao 接口
�CCustomer 值对象（VO)
�CCustomerDaoImpl（接口的具体实现类）
�CCustomerFactory（工厂类，实例化用）
�CDAO设计模式
? DAO设计模式
�CDAO的全称是：Data Access Object，数据访问对象。
�C使用DAO设计模式，来封装数据库持久层的所有操作（CRUD），使低级的数据逻辑和高级的业务逻辑分离，达到解耦合的目的。
? 一个典型的DAO实现有如下的组件：
�C一个 DAO 接口
�C一个实现了 DAO 接口的具体类
�C一个 DAO 工厂类
�C数据传输对象(有时称为值对象)
?以维护一个客户信息为例，具体组件如下所示：
�CCustomerDao 接口
�CCustomer 值对象（VO)
�CCustomerDaoImpl（接口的具体实现类）
�CCustomerFactory（工厂类，实例化用）
�CMVC设计模式
? MVC的全称是：Model(模型) View(视图) Controller( 控制器)
? Model
�C对应业务逻辑层、数据逻辑层
�C由接口及其实现类充当
? View
�C对应表现层
�C由HTML页面、JSP页面、Tag（标签）等充当
? Controller
�C对应控制层
�C由Servlet 或Struts中的Action等充当
? MVC的全称是：Model(模型) View(视图) Controller( 控制器)
? Model
�C对应业务逻辑层、数据逻辑层
�C由接口及其实现类充当
? View
�C对应表现层
�C由HTML页面、JSP页面、Tag（标签）等充当
? Controller
�C对应控制层
�C由Servlet 或Struts中的Action等充当
? 编程思想和设计模式的具体应用
�C图示
�C图示
自定义MVC
?实例
�C以添加客户和查询客户列表为例来说明上述内容
�C程序运行结果
�C以添加客户和查询客户列表为例来说明上述内容
�C程序运行结果
数据库设置
CustomerDao.java
CustomerDaoImpl.java
package com.redking.dao.impl;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import com.redking.dao.CustomerDao;
import com.redking.util.ConnectionUtil;
import com.redking.util.SQLConstants;
import com.redking.vo.Customer;
public class CustomerDaoImpl implements CustomerDao,SQLConstants{
public List listCustomer() {
ConnectionUtil cu = new ConnectionUtil();
Connection conn = cu.getConnection();
//conn.setAutoCommit(false);设置默认不自动提交
//Statement stmt;静态添加
//PrepareStatement pstmt;动态添加
List list = new ArrayList();
try {
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(QUERY_CUSTOMER_SQL);
while(rs.next()){
int id = rs.getInt(1);
String name = rs.getString(2);
String email = rs.getString(3);
Customer c = new Customer();
c.setId(id);
c.setName(name);
c.setEmail(email);
list.add(c);
}
return list;
} catch (SQLException e) {
e.printStackTrace();
} finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return null;
}
public void save(Customer c) {
ConnectionUtil cu = new ConnectionUtil();
Connection conn = cu.getConnection();
//conn.setAutoCommit(false);设置默认不自动提交
//Statement stmt;静态添加
//PrepareStatement pstmt;动态添加
PreparedStatement pstmt = null;
try {
pstmt = conn.prepareStatement(ADD_CUSTOMER_SQL);
pstmt.setString(1, c.getName());
pstmt.setString(2, c.getEmail());
pstmt.executeUpdate();
//conn.commit();设置强制提交
} catch (SQLException e) {
e.printStackTrace();
} finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import com.redking.dao.CustomerDao;
import com.redking.util.ConnectionUtil;
import com.redking.util.SQLConstants;
import com.redking.vo.Customer;
public class CustomerDaoImpl implements CustomerDao,SQLConstants{
public List listCustomer() {
ConnectionUtil cu = new ConnectionUtil();
Connection conn = cu.getConnection();
//conn.setAutoCommit(false);设置默认不自动提交
//Statement stmt;静态添加
//PrepareStatement pstmt;动态添加
List list = new ArrayList();
try {
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(QUERY_CUSTOMER_SQL);
while(rs.next()){
int id = rs.getInt(1);
String name = rs.getString(2);
String email = rs.getString(3);
Customer c = new Customer();
c.setId(id);
c.setName(name);
c.setEmail(email);
list.add(c);
}
return list;
} catch (SQLException e) {
e.printStackTrace();
} finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return null;
}
public void save(Customer c) {
ConnectionUtil cu = new ConnectionUtil();
Connection conn = cu.getConnection();
//conn.setAutoCommit(false);设置默认不自动提交
//Statement stmt;静态添加
//PrepareStatement pstmt;动态添加
PreparedStatement pstmt = null;
try {
pstmt = conn.prepareStatement(ADD_CUSTOMER_SQL);
pstmt.setString(1, c.getName());
pstmt.setString(2, c.getEmail());
pstmt.executeUpdate();
//conn.commit();设置强制提交
} catch (SQLException e) {
e.printStackTrace();
} finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
CustomerServlet.java
package com.redking.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.redking.dao.CustomerDao;
import com.redking.dao.impl.CustomerDaoImpl;
import com.redking.vo.Customer;
public class CustomerServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public CustomerServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
/*
//响应用户请求
String name = request.getParameter("name");
String email = request.getParameter("email");
//调用后台逻辑-dao
CustomerDao dao = new CustomerDaoImpl();
Customer c = new Customer();
c.setName(name);
c.setEmail(email);
dao.save(c);
//跳转其他页面
//RequestDispatcher
request.getRequestDispatcher("/pages/Customer.jsp").forward(request,response);
*/
String methodName = request.getParameter( "methodName");
if(methodName!= null&&methodName.equals( "save")){
save(request,response);
} else{
list(request,response);
}
}
public void save(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//响应用户请求
String name = request.getParameter( "name");
String email = request.getParameter( "email");
//调用后台逻辑-dao
CustomerDao dao = new CustomerDaoImpl();
Customer c = new Customer();
c.setName(name);
c.setEmail(email);
dao.save(c);
//跳转其他页面
//RequestDispatcher
//request.getRequestDispatcher("/pages/Customer.jsp").forward(request,response);
list(request,response);
}
public void list(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//响应用户请求
String name = request.getParameter( "name");
String email = request.getParameter( "email");
//调用后台逻辑-dao
CustomerDao dao = new CustomerDaoImpl();
List list = dao.listCustomer();
request.setAttribute( "CustomerList", list);
//跳转其他页面
//RequestDispatcher
request.getRequestDispatcher( "/pages/Customer.jsp").forward(request,response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.redking.dao.CustomerDao;
import com.redking.dao.impl.CustomerDaoImpl;
import com.redking.vo.Customer;
public class CustomerServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public CustomerServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
/*
//响应用户请求
String name = request.getParameter("name");
String email = request.getParameter("email");
//调用后台逻辑-dao
CustomerDao dao = new CustomerDaoImpl();
Customer c = new Customer();
c.setName(name);
c.setEmail(email);
dao.save(c);
//跳转其他页面
//RequestDispatcher
request.getRequestDispatcher("/pages/Customer.jsp").forward(request,response);
*/
String methodName = request.getParameter( "methodName");
if(methodName!= null&&methodName.equals( "save")){
save(request,response);
} else{
list(request,response);
}
}
public void save(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//响应用户请求
String name = request.getParameter( "name");
String email = request.getParameter( "email");
//调用后台逻辑-dao
CustomerDao dao = new CustomerDaoImpl();
Customer c = new Customer();
c.setName(name);
c.setEmail(email);
dao.save(c);
//跳转其他页面
//RequestDispatcher
//request.getRequestDispatcher("/pages/Customer.jsp").forward(request,response);
list(request,response);
}
public void list(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//响应用户请求
String name = request.getParameter( "name");
String email = request.getParameter( "email");
//调用后台逻辑-dao
CustomerDao dao = new CustomerDaoImpl();
List list = dao.listCustomer();
request.setAttribute( "CustomerList", list);
//跳转其他页面
//RequestDispatcher
request.getRequestDispatcher( "/pages/Customer.jsp").forward(request,response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
ConnectionUtilTest.java
CustomerDaoImplTest.java
ConnectionUtil.java
SQLConstants.java
Customer.java
DBConfig.properties
Customer.jsp
<%@ page language= "java" import= "java.util.*,com.redking.vo.*" pageEncoding= "gbk"%>
<%@ taglib uri= "http://java.sun.com/jsp/jstl/core" prefix="redking" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'Customer.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form name="f1" id="f1" action="<%=path %>/servlet/CustomerServlet?methodName=save" method="post">
<table border="0">
<tr>
<td>Name:</td>
<td><input type="text" name="name" ></td>
</tr>
<tr>
<td>Email:</td>
<td><input type="text" name="email" ></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="保存"></td>
</tr>
</table>
</form>
<hr>
<table>
<tr><th>ID</th><th>Name</th><th>Email</th></tr>
<%--
<%
List list = (List) request.getAttribute("CustomerList");
//遍列LIST
for(int i=0;i<list.size();i++){
Customer c = (Customer) list.get(i);
out.println("<tr>");
out.println("<td>");
out.println(c.getId());
out.println("</td>");
out.println("<td>");
out.println(c.getName());
out.println("</td>");
out.println("<td>");
out.println(c.getEmail());
out.println("</td>");
out.println("</tr>");
}
%>
--%>
<%--使用标准标签 --%>
<redking:forEach var="c" items="${CustomerList}">
<tr>
<td>
${c.id }
</td>
<td>
${c.name }
</td>
<td>
${c.email }
</td>
</tr>
</redking:forEach>
</table>
</body>
</html>
<%@ taglib uri= "http://java.sun.com/jsp/jstl/core" prefix="redking" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'Customer.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form name="f1" id="f1" action="<%=path %>/servlet/CustomerServlet?methodName=save" method="post">
<table border="0">
<tr>
<td>Name:</td>
<td><input type="text" name="name" ></td>
</tr>
<tr>
<td>Email:</td>
<td><input type="text" name="email" ></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="保存"></td>
</tr>
</table>
</form>
<hr>
<table>
<tr><th>ID</th><th>Name</th><th>Email</th></tr>
<%--
<%
List list = (List) request.getAttribute("CustomerList");
//遍列LIST
for(int i=0;i<list.size();i++){
Customer c = (Customer) list.get(i);
out.println("<tr>");
out.println("<td>");
out.println(c.getId());
out.println("</td>");
out.println("<td>");
out.println(c.getName());
out.println("</td>");
out.println("<td>");
out.println(c.getEmail());
out.println("</td>");
out.println("</tr>");
}
%>
--%>
<%--使用标准标签 --%>
<redking:forEach var="c" items="${CustomerList}">
<tr>
<td>
${c.id }
</td>
<td>
${c.name }
</td>
<td>
${c.email }
</td>
</tr>
</redking:forEach>
</table>
</body>
</html>
测试：
----------------------------------END-------------------------------------