【Struts 分派Action】DispatchAction
LoginAction
package k.action; import k.form.UserForm;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; public class LoginAction extends DispatchAction { public ActionForward userLogin(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception {
return mapping.findForward("login");
} public ActionForward doUserLogin(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception {
UserForm userForm = (UserForm) form;
if ("1".equals(userForm.getPassword())) {
return mapping.findForward("ok");
} else {
return mapping.findForward("err");
}
} public ActionForward userLoginOut(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception {
request.getSession().invalidate();
System.out.println("userLoginOut");
return mapping.findForward("login");
}
public ActionForward userLoginOut2(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception {
request.getSession().invalidate();
System.out.println("userLoginOut2");
return mapping.findForward("login");
}
}
struts-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
"http://struts.apache.org/dtds/struts-config_1_3.dtd">
<struts-config>
<form-beans>
<form-bean name="userForm" type="k.form.UserForm"></form-bean>
</form-beans>
<action-mappings>
<action name="userForm" path="/login" parameter="action" type="k.action.LoginAction"
scope="request" attribute="userForm" input="index.jsp" validate="false">
<forward name="ok" path="/WEB-INF/jsp/ok.jsp"></forward>
<forward name="err" path="/WEB-INF/jsp/err.jsp"></forward>
<forward name="login" path="/WEB-INF/jsp/login.jsp"></forward>
</action>
</action-mappings>
</struts-config>
login.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>登录页面</h1>
<form action="${APP_PATH}/login.do?action=doUserLogin" method="post">
账号：<input type="text" name="userName" value="11哈哈"> <br>
密码： <input type="password" name="password" value="1"> <br>
<input type="submit" value="submit"> <br>
</form>
</body>
</html>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<servlet>
<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>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping> <welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list> <filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>k.filter.EncodingFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping> <listener>
<display-name>StartSystemListener</display-name>
<listener-class>k.filter.StartSystemListener</listener-class>
</listener>
</web-app>
EncodingFilter
package k.filter; import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import java.io.IOException; public class EncodingFilter extends HttpServlet implements Filter {
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
FilterChain filterChain) throws IOException, ServletException {
servletRequest.setCharacterEncoding("utf-8");
servletResponse.setCharacterEncoding("utf-8");
// System.out.println("========== set utf-8 ok ==========");
filterChain.doFilter(servletRequest, servletResponse);
} @Override
public void init(FilterConfig filterConfig) throws ServletException { }
}
StartSystemListener
package k.filter; import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener; public class StartSystemListener implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
//1.将项目上下文路径(request.getContextPath())放置到application域中.
ServletContext application = sce.getServletContext();
String app_path = application.getContextPath();
application.setAttribute("APP_PATH", app_path);
System.out.println("========== APP_PATH = " + app_path);
WebHelper.setApp_Path(app_path);
} @Override
public void contextDestroyed(ServletContextEvent sce) { }
}
WebHelper
package k.filter;
public class WebHelper {
public static String getApp_Path() {
return APP_PATH;
}
public static void setApp_Path(String appPath) {
APP_PATH = appPath;
}
private static String APP_PATH = "";
}
UserForm
package k.form;
import org.apache.struts.action.ActionForm;
public class UserForm extends ActionForm {
private String name;
private String password;
public UserForm() {
}
public UserForm(String name, String password) {
this.name = name;
this.password = password;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
err.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>登录失败</h1>
<a href="${APP_PATH}/login.do?action=userLogin">返回登录</a>
</body>
</html>
ok.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>登录失败</h1>
<a href="${APP_PATH}/login.do?action=userLogin">返回登录</a>
</body>
</html>
index,jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<jsp:forward page="WEB-INF/jsp/login.jsp"></jsp:forward>
</body>
</html>
【Struts 分派Action】DispatchAction的更多相关文章
- 重读《Struts In Action》
Figure 1.1. The Java Servlet API exposes the HTTP client/server protocol to the Java platform. S ...
- 关于Spring的Controller及Struts的Action的多线程的注意
struts是线程安全,并不是指多线程,而是指单态,当多个用户访问一个请求的时候,服务器内存中只有一个与之对应的action类对象,execute方法加上了同步关键字,如果你在action里加上一个全 ...
- struts中action名称反复导致的神秘事件
近期由于项目需求变更.须要本人对当中的某个业务功能进行改动.本人依照前台页面找action,依据action找代码的逻辑进行了改动(公司项目是ssh框架,struts配置全部是通过注解的方式进行.配置 ...
- 实现Spring管理struts的Action
struts2和spring的整合,关键点在于struts2中的action要纳入spring容器的管理中成为一个bean. 可以在struts2中配置: <struts> ...
- （五）Struts之Action类基础（二）
上一章节末((三)Struts之Action类基础(一))介绍了如何获取用户输入数据的获取.接着就是在Struts中怎么把数据响应给用户端,这就必须要求我们把数据放到作用域中,然后才能显示到用户浏览器 ...
- JavaWeb_(Struts2框架)Struts创建Action的三种方式
此系列博文基于同一个项目已上传至github 传送门 JavaWeb_(Struts2框架)Struts创建Action的三种方式 传送门 JavaWeb_(Struts2框架)struts.xml核 ...
- Struts 1之DispatchAction
DispatchAction是struts 1 的内置通用分发器 import org.apache.struts.actions.DispatchAction; public class UserA ...
- Struts中Action三种接收参数的方式？
前言: 前面已经有一篇随笔介绍了Struts2的大概原理.本文就Struts2中Action与jsp页面进行数据对接时介绍几种常见方法! 值栈ValueStack 3个Action Action1 p ...
- struts+service+action+数据库
用户登录流程 1.jsp根据form表单中的action的login <form action="/test02/login" method="post&quo ...
随机推荐
- normalization, standardization and regularization
Normalization Normalization refers to rescaling real valued numeric attributes into the range 0 and ...
- bootstrap4的改进
- 诡异的BUG
1.今天遇到一个诡异的BUG(一个很古老的项目),为什么说他诡异呢,我们本地都是OK的,但是现场部署就会报错? 2.描述下现象其实这个问题不难定位(关键是有个jar包没有源码不能进行验证性的编译) 我 ...
- java项目中的异常处理总结
异常指的是运行期出现的错误,也就是当程序开始执行以后执行期出现的错误.出现错误时观察错误的名字和行号最为重要. 比如你读取的文件不存在,数组越界,进行除法时,除数为0等都会导致异常. 我找一个比较形象 ...
- html 未选择复选框不上传
问题 之前就遇到类似的问题,在一个列表中,如果有复选框,并且不选中 会导致这个复选框不上传,导致后台接收不到复选框数据 解决方法我想到的就是 <td> <input type=&qu ...
- Android Studio 初级控件笔记
Android支持的像素单位 Android支持的像素单位有:px(像素).in(英寸).mm(毫米).pt(磅,1/72英寸).dp(与设备无关的显示单位).dip(就是dp).sp(用于设置字体大 ...
- Word2010如何从指定页设置页码
光标定位:将光标定位于需要开始编页码的页首位置. 插入分隔符的”下一页”:选择“页面布局—>分隔符—> 下一页”插入. 插入页码:选择“插入—>页码—> 页面底端”,选 ...
- 扩展欧几里得求解同余方程（poj 1061）
设方程 ax + by = c , 若 gcd(a,b) 是 c的因子(记作gcd(a,b)|c)则方程有解,反之无解. 其中x0,y0是方程的一组特解 , d = gcd(a,b), poj1061 ...
- JS高级---原型和原型链
原型和原型链 原型链是一种关系, 实例对象和原型对象之间的关系,关系是通过实例对象中浏览器使用的原型(__proto__)来联系的 自定义构造函数,通过实例化,创建实例对象 实例对象中__proto_ ...
- C位域操作
位域的概念 1个字节包含8位,有些变量保存的数据不需要占用这么长的空间(比如bool类型,只有两个状态true和false, 1位就可以搞定,剩下的7位就浪费了),这就催生了“位域”结构,位域将1个字 ...