Struts的特点:
- 由出色稳定的框架Struts1和WebWork框架整合起来
- 吸取两大框架的优点
- 提高开发效率和规范性
- 更好的实现了MVC架构
- 解除了与Servlet的强耦合
Struts框架的意义:
更便捷的开发:
- 自动封装表单数据:属性驱动,模型驱动
- 便捷的实现上传文件功能:FileUpload
- 是网站通用语国内外:国际化
- 通过配置表完成表单验证:校验器
- 强大的标签库:Struts2标签库,OGNL标签库
更科学的管理
使用xml文件管理程序文件对应关系
更安全的操作
- 安全的线程:每个action都是独立的
- 防止数据重复提交:token令牌机制
- 异常处理机制:通过配置来完成,更便于管理
先进的编程思想
面向切面编程:拦截器
实例:
bean.User.java
<span style="font-size:18px;">package bean;
public class User {
private int id;
private String username;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public User(int id, String username, String password) {
super();
this.id = id;
this.username = username;
this.password = password;
}
public User() {
super();
}
}
</span>
filter.UserFilter.java
<span style="font-size:18px;">package filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import bean.User;
public class UserFilter implements Filter {
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
HttpServletRequest request=(HttpServletRequest)arg0;
String url=request.getServletPath();
if(url.equals("/register.action")){
request.getRequestDispatcher("/register.jsp").forward(arg0, arg1);
return;
}else if(url.equals("/saveUser.action")){
String username=request.getParameter("username");
String password=request.getParameter("password");
String password1=request.getParameter("password1");
if(password.equals(password1)){
User user=new User();
user.setUsername(username);
user.setPassword(password);</span>
<span style="font-size:18px;"> request.getRequestDispatcher("/end.jsp").forward(arg0, arg1);
return;
}else{
request.getRequestDispatcher("/register.jsp");
return;
}
}
arg2.doFilter(arg0, arg1);
}
@Override
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}
}
</span>
<span style="font-size:18px;"><%@ page language="java" import="java.util.*" pageEncoding="utf8"%>
<!DOCTYPE HTML ">
<html>
<head>
</head>
<body>
<a href="register.action">注册</a>
</body>
</html>
</span>
register.jsp
<span style="font-size:18px;"><%@ page language="java" import="java.util.*" pageEncoding="utf8"%>
<!DOCTYPE html>
<html>
<head></head>
<body>
<form action="saveUser.action">
username:<input type="text" name="username">
password:<input type="password" name="password">
Password:<input type="password" name="password1">
<button type="submit">submit</button>
</form>
</body>
</html>
</span>
<span style="font-size:18px;"><%@ page language="java" import="java.util.*" pageEncoding="utf8"%>
<!DOCTYPE HTML ">
<html>
<head>
</head>
<body>
<h2>注册成功!</h2>
</body>
</html></span>
web.xml
<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>PutHereTheNameOfYourWebApp</display-name>
<description>This a description of my web app made by Eclipse</description>
<filter>
<filter-name>UserFilter</filter-name>
<filter-class>filter.UserFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>UserFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>/AJsp.jsp</welcome-file>
</welcome-file-list>
</web-app>
</span>