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mushiyu123:
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iText官方教程 -
sf_dream:
楼主,你那个放到没有安装jdk的电脑上可以运行不?
eclipse导出jar文件再将它转换成exe可执行文件详解 -
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哥们 没图了 弄个附件 文档 供我们下载吧
PowerDesigner 使用教程(很具体,很实用) -
dhkswh:
楼主写的代码超级多错...不过总算看懂了,楼主是class.A ...
java swing 弹出对话框与父窗口传值实例
Struts2一个Action内包含多个请求处理方法的处理,method的使用方法,struts2中的路径问题,通配符映射
Struts2一个Action内包含多个请求处理方法的处理,method的使用方法,struts2中的路径问题,通配符映射
<action<wbr><wbr> name= "Login_* "<wbr><wbr> method= "{1} "<wbr><wbr> class= "mailreader2.Login "><br> 中Login_*带*是什么意思?method= "{1} "带{}这个是什么意思?<br> ====================================================<br> name= "Login_* "<br> 代表这个action处理所有以Login_开头的请求<br> method= "{1} "<br> 根据前面请求Login_methodname,调用action中的以methodname命名的方法<br> class= "mailreader2.Login "<br> action的类名称</wbr></wbr></wbr></wbr></wbr></wbr>
如jsp文件中请求Login_validateUser的action名称,根据上面配置,调用action类mailreader2.Login类中方法validateUser()
又如:
对于Login_update请求,将会调用mailreader2.Login的update()方法。
它的用法同webwork中的!符号的作用,相当于是一个通配符。
<wbr></wbr>
<wbr></wbr>
+++++++++++++++++++++++++++++++++++++++++++++++++++++++
Struts2 学习笔记4--Action Method--接收参数
文章分类:Java编程
struts2中的路径问题
注意:在jsp中”/”表示tomcat服务器的根目录,在struts.xml配置文件中”/”表示webapp的根路径,即MyEclipse web项目中的WebRoot路径。
总结:
struts2中的路径问题是根据action的路径而不是jsp路径来确定,所以尽量不要使用相对路径 。
虽然可以用redirect方式解决,但redirect方式并非必要。
解决办法非常简单,统一使用绝对路径。(在jsp中用request.getContextRoot方式来拿到webapp的路径)
或者使用myeclipse经常用的,指定basePath。
<wbr></wbr>
Action Method
配置:
<wbr><wbr><wbr> <package name="user" extends="struts-default" namespace="/user"><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <action name="userAdd" class="com.bjsxt.struts2.user.action.UserAction" method="add"><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result>/user_add_success.jsp</result><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> </action><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <action name="user" class="com.bjsxt.struts2.user.action.UserAction"><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result>/user_add_success.jsp</result><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> </action><br><wbr><wbr><wbr> </package><br>
总结:<br>
Action执行的时候并不一定要执行execute方法<br>
1、可以在配置文件中配置Action的时候用method=来指定执行哪个方法(前者方法)<br><span style="color:#ff0000">2、也可以在url地址中动态指定(动态方法调用DMI )(推荐)(后者方法)<br></span><a href="<%=context %>/user/userAdd">添加用户</a><br>
<br /><br><span style="color:#ff0000"><a href="<%=context %>/user/user!add">添加用户</a><br></span><br /><br>
前者会产生太多的action,所以不推荐使用。(注:<% String context = request.getContextPath(); %>)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
再给个案例,大概介绍!使用动态调用DMI的方法,即通过!+方法名的指定方法:
UserAction.java
import com.opensymphony.xwork2.ActionContext;
import java.util.Map;
public class UserAction {
<wbr>private String userName;<br><wbr>private String password;<br><wbr><br><wbr>public String getUserName() {<br><wbr><wbr>return userName;<br></wbr></wbr></wbr></wbr></wbr></wbr><wbr>}</wbr>
<wbr>public void setUserName(String userName) {<br><wbr><wbr>this.userName = userName;<br><wbr>}</wbr></wbr></wbr></wbr>
<wbr>public String getPassword() {<br><wbr><wbr>return password;<br><wbr>}</wbr></wbr></wbr></wbr>
<wbr>public void setPassword(String password) {<br><wbr><wbr>this.password = password;<br><wbr>}</wbr></wbr></wbr></wbr>
<wbr>public String execute(){<br><wbr><wbr>if(!userName.equals("aa")||!password.equals("aa")){<br></wbr></wbr></wbr><wbr><wbr><wbr>return "error";<br><wbr><wbr>}else{<br><wbr><wbr><wbr>Map session=(Map)ActionContext.getContext().getSession();<br><wbr><wbr><wbr>session.put("userName", userName);<br><wbr><wbr><wbr>return "success";<br><wbr><wbr>}<br><wbr>}<br><wbr><br><wbr>public String loginOther(){<br><wbr><wbr>if(!userName.equals("bb")||!password.equals("bb")){<br><wbr><wbr><wbr>return "error";<br><wbr><wbr>}else{<br><wbr><wbr><wbr>Map session=(Map)ActionContext.getContext().getSession();<br><wbr><wbr><wbr>session.put("userName", userName);<br><wbr><wbr><wbr>return "success";<br><wbr><wbr>}<br><wbr>}<br></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>}
struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<wbr><package name="default" extends="struts-default"><br><wbr><wbr><action name="struts" class="org.action.StrutsAction"><br><wbr><wbr><wbr><result name="success">/welcome.jsp</result><br><wbr><wbr><wbr><result name="error">/hello.jsp</result><br><wbr><wbr><wbr><result name="input">/hello.jsp</result><br><wbr><wbr></action><br><wbr><wbr><action name="user" class="org.action.UserAction"><br><wbr><wbr><wbr><result name="success">/login_welcome.jsp</result><br><wbr><wbr><wbr><result name="error">/login_error.jsp</result><br><wbr><wbr></action><br><wbr><wbr><span style="color:#ff0000"><!--<action name="loginOther" class="org.action.UserAction" method="loginOther"><br><wbr><wbr><wbr><result name="success">/login_welcome.jsp</result><br><wbr><wbr><wbr><result name="error">/login_error.jsp</result><br><wbr><wbr></action><br><wbr>--></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
</package>
</struts>
<wbr></wbr>
login_welcome.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<wbr> <head><br><wbr><wbr><wbr> <title>欢迎</title></wbr></wbr></wbr></wbr>
<wbr><meta http-equiv="pragma" content="no-cache"><br><wbr><meta http-equiv="cache-control" content="no-cache"><br><wbr><meta http-equiv="expires" content="0"><wbr><wbr><wbr><br><wbr><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><br><wbr><meta http-equiv="description" content="This is my page"><br><wbr><!--<br><wbr><link rel="stylesheet" type="text/css" href="styles.css"><br><wbr>--></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> </head><br><wbr><br><wbr> <body><br><wbr> <s:set value="#session.userName" name="userName" /><br><wbr><wbr> 你好!<s:property value="#userName"/><br><wbr> </body><br> </html><br></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
login_error.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<wbr> <head><br><wbr><wbr><wbr> <title>登陆失败</title></wbr></wbr></wbr></wbr>
<wbr><meta http-equiv="pragma" content="no-cache"><br><wbr><meta http-equiv="cache-control" content="no-cache"><br><wbr><meta http-equiv="expires" content="0"><wbr><wbr><wbr><br><wbr><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><br><wbr><meta http-equiv="description" content="This is my page"><br><wbr><!--<br><wbr><link rel="stylesheet" type="text/css" href="styles.css"><br><wbr>--></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> </head><br><wbr><br><wbr> <body><br><wbr><wbr><wbr> 很抱歉!你的登陆失败了!请重新<a href="login.jsp">登陆</a><br><wbr> </body><br> </html></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<wbr> <head><br><wbr><wbr><wbr> <base href="<%=basePath%>"><br><wbr><wbr><wbr><br><wbr><wbr><wbr> <title>struts 2应用</title><br><wbr><meta http-equiv="pragma" content="no-cache"><br><wbr><meta http-equiv="cache-control" content="no-cache"><br><wbr><meta http-equiv="expires" content="0"><wbr><wbr><wbr><br><wbr><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><br><wbr><meta http-equiv="description" content="This is my page"><br><wbr><!--<br><wbr><link rel="stylesheet" type="text/css" href="styles.css"><br><wbr>--></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr> </head></wbr>
<wbr> <body><br><wbr><wbr><wbr> <s:form<wbr> action="<span style="color:#ff0000">user!loginOther</span>" method="post"><wbr><span style="color:#ff0000">红色部分,你如果想调用userAction中的loginOther方法而不想调用execute方法,</span><wbr><span style="color:#ff0000">直接通过!+方法名即可,那你就不用再设置struts.xml中注释掉的部分了,这样可以不产生太多的action</span><br> <s:textfield name="userName" label="请输入姓名" ></s:textfield><wbr><s:textfield name="password" label="请输入密码"></s:textfield><br><wbr><s:submit value="提交"></s:submit><br><wbr></s:form><br><wbr> </body><br> </html></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr></wbr>
Action Wildcard(Action 通配符)
配置:
<wbr><wbr><wbr> <package name="actions" extends="struts-default" namespace="/actions"><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <action name="Student*" class="com.bjsxt.struts2.action.StudentAction" method="{1}"><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result>/Student{1}_success.jsp</result><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> </action><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <action name="*_*" class="com.bjsxt.struts2.action.{1}Action" method="{2}"><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result>/{1}_{2}_success.jsp</result><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <!-- {0}_success.jsp --><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> </action><br>
</package><br>
{1}、{2}表示第一第二个占位符<br>
*为通配符</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
通过action name的通配匹配,获得占位符,可以使用占位符放在result和method、class中替代匹配的字符。
总结:
使用通配符,将配置量降到最低。
<a href="<%=context %>/actions/Studentadd">添加学生</a>
<a href="<%=context %>/actions/Studentdelete">删除学生</a>
不过,一定要遵守"约定优于配置"的原则。
<a href="<%=context %>/actions/Teacher_add">添加老师</a>
<a href="<%=context %>/actions/Teacher_delete">删除老师</a>
<a href="<%=context %>/actions/Course_add">添加课程</a>
<a href="<%=context %>/actions/Course_delete">删除课程</a>
<wbr></wbr>
<wbr></wbr>
<wbr></wbr>
接收参数值
1、使用action属性接收参数
只需在action加入getter/setter方法,如参数name=a,接受到参数必须有getName/setName方法。
<wbr></wbr>
链接:<a href="user/user!add?name=a&age=8">
public class UserAction extends ActionSupport {
<wbr><wbr><wbr><br><wbr><wbr><wbr> private String name;<br><wbr><wbr><wbr> private int age;<br><wbr><wbr><wbr><br><wbr><wbr><wbr> public String add() {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> System.out.println("name=" + name);<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> System.out.println("age=" + age);<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return SUCCESS;<br><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr> public String getName() {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return name;<br><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr> public void setName(String name) {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> this.name = name;<br><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr> public int getAge() {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return age;<br><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr> public void setAge(int age) {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> this.age = age;<br><wbr><wbr><wbr> }<br> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
2、使用Domain Model接收参数
将之前的属性放入到POJO ,并设置属性的setter/getter方法
链接:使用Domain Model接收参数<a href="user/user!add?user.name=a&user.age=8">添加用户</a>
public class UserAction extends ActionSupport {
<wbr><wbr><wbr><br><wbr><wbr><wbr> private User user;<br><wbr><wbr><wbr> //private UserDTO userDTO;<br><wbr><wbr><wbr> public String add() {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> System.out.println("name=" + user.getName());<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> System.out.println("age=" + user.getAge());<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return SUCCESS;<br><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr> public User getUser() {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return user;<br><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr> public void setUser(User user) {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> this.user = user;<br><wbr><wbr><wbr> }<br><wbr><wbr><wbr><br> }<br> public class User {<br><wbr><wbr><wbr> private String name;<br><wbr><wbr><wbr> private int age;<br><wbr><wbr><wbr> public String getName() {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return name;<br><wbr><wbr><wbr> }<br><wbr><wbr><wbr> public void setName(String name) {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> this.name = name;<br><wbr><wbr><wbr> }<br><wbr><wbr><wbr> public int getAge() {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return age;<br><wbr><wbr><wbr> }<br><wbr><wbr><wbr> public void setAge(int age) {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> this.age = age;<br><wbr><wbr><wbr> }<br> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
3、使用ModelDriven接收参数
Action实现ModelDriven接口,实现getModel()方法。
这样user需要自己new出来,getModel返回user。
链接:使用ModelDriven接收参数<a href="user/user!add?name=a&age=8">添加用户</a>
public class UserAction extends ActionSupport implements ModelDriven<User> {
<wbr><wbr><wbr><br><wbr><wbr><wbr> private User user = new User();<br><wbr><wbr><wbr><br><wbr><wbr><wbr> public String add() {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> System.out.println("name=" + user.getName());<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> System.out.println("age=" + user.getAge());<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return SUCCESS;<br><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr> @Override<br><wbr><wbr><wbr> public User getModel() {<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return user;<br><wbr><wbr><wbr> }<br> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
字符编码
配置:
<constant name="struts.i18n.encoding" value="GBK" /> <!-- internationalization -->
在struts2.1.6中不起作用,属于bug,在struts2.1.7中修改。
解决方案:
修改web.xml 中:
<wbr> <filter><br><wbr><wbr><wbr><wbr><wbr> <filter-name>struts2</filter-name><br><wbr><wbr><wbr><wbr><wbr> <!-- struts2.1中使用filter --><br>
<!--<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteF<wbr>ilter</filter-class>--><br><wbr><wbr><wbr><wbr><wbr> <!-- struts2.0中使用的filter --><br>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class><br><wbr> </filter></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr></wbr>
<wbr><br>
=============================================================</wbr>
Struts2一个Action内包含多个请求处理方法的处理(三种方式)
Struts1提供了DispatchAction,从而允许一个Action内包含多个请求处理方法。Struts2也提供了类似的功能。处理方式主要有以下三种方式:
1.1. 动态方法调用:
DMI:Dynamic Method Invocation 动态方法调用。
动态方法调用是指:表单元素的action不直接等于某个Action的名字,而是以如下形式来指定对应的动作名:
<form method="post" action="userOpt!login.action">
则用户的请求将提交到名为”userOpt”的Action实例,Action实例将调用名为”login”方法来处理请求。同时login方法的签名也是跟execute()一样,即为public String login() throws Exception。
注意:要使用动态方法调用,必须设置Struts2允许动态方法调用,通过设置struts.enable.DynamicMethodInvocation常量来完成,该常量属性的默认值是true。
1.1.1.<wbr><wbr><wbr> 示例:</wbr></wbr></wbr>
修改用户登录验证示例,多增加一个注册用户功能。
1.<wbr><wbr><wbr> 修改Action类:</wbr></wbr></wbr>
package org.qiujy.web.struts2.action;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
<wbr></wbr>
publicclass LoginAction extends ActionSupport{
private String userName;
private String password;
private String msg; //结果信息属性
public String getMsg() {
<wbr><wbr><wbr><wbr><wbr><wbr> returnmsg;</wbr></wbr></wbr></wbr></wbr></wbr>
}
<wbr></wbr>
publicvoid setMsg(String msg) {
<wbr><wbr><wbr><wbr><wbr><wbr> this.msg = msg;</wbr></wbr></wbr></wbr></wbr></wbr>
}
<wbr></wbr>
public String getUserName() {
<wbr><wbr><wbr><wbr><wbr><wbr> returnuserName;</wbr></wbr></wbr></wbr></wbr></wbr>
}
<wbr></wbr>
publicvoid setUserName(String userName) {
<wbr><wbr><wbr><wbr><wbr><wbr> this.userName = userName;</wbr></wbr></wbr></wbr></wbr></wbr>
}
<wbr></wbr>
public String getPassword() {
<wbr><wbr><wbr><wbr><wbr><wbr> returnpassword;</wbr></wbr></wbr></wbr></wbr></wbr>
}
<wbr></wbr>
publicvoid setPassword(String password) {
<wbr><wbr><wbr><wbr><wbr><wbr> this.password = password;</wbr></wbr></wbr></wbr></wbr></wbr>
}
public String login() throws Exception{
<wbr><wbr><wbr><wbr><wbr><wbr> if("test".equals(this.userName) && "test".equals(this.password)){</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> msg = "登录成功,欢迎" + this.userName;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> //获取ActionContext实例,通过它来访问Servlet API</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> ActionContext context = ActionContext.getContext();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> //看session中是否已经存放了用户名,如果存放了:说明已经登录了;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
//否则说明是第一次登录成功
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> if(null != context.getSession().get("uName")){</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> msg = this.userName + ":你已经登录过了!!!";</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> }else{</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> context.getSession().put("uName", this.userName);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> returnthis.SUCCESS;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> }else{</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> msg = "登录失败,用户名或密码错";</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> returnthis.ERROR;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> }</wbr></wbr></wbr></wbr></wbr></wbr>
}
public String regist() throws Exception{
<wbr><wbr><wbr><wbr><wbr><wbr> //将用户名,密码添加到数据库中</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> //...</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> msg = "注册成功。";</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> returnthis.SUCCESS;</wbr></wbr></wbr></wbr></wbr></wbr>
}
}
2.<wbr><wbr><wbr> struts.xml文件:没有什么变化,跟以前一样配置</wbr></wbr></wbr>
<!DOCTYPE struts PUBLIC
<wbr><wbr><wbr><wbr><wbr><wbr> "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> "<a href="http://struts.apache.org/dtds/struts-2.0.dtd"><span style="color:#189a0f">http://struts.apache.org/dtds/struts-2.0.dtd</span></a>"></wbr></wbr></wbr></wbr></wbr></wbr>
<struts>
<package name="my" extends="struts-default" namespace="/manage">
<!-- 定义处理请求URL为login.action的Action -->
<wbr><wbr><wbr><wbr><wbr><wbr> <action name="userOpt" class="org.qiujy.web.struts2.action.LoginAction"></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> <!-- 定义处理结果字符串和资源之间的映射关系 --></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result name="success">/success.jsp</result></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result name="error">/error.jsp</result></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> </action></wbr></wbr></wbr></wbr></wbr></wbr>
</package>
</struts>
3.<wbr><wbr><wbr> 页面:</wbr></wbr></wbr>
index.jsp
<%@ page language="java" pageEncoding="UTF-8"%>
<html>
<head>
<title>用户登录页面</title>
</head>
<body>
<wbr><wbr> <h2>用户入口</h2></wbr></wbr>
<wbr><wbr> <hr></wbr></wbr>
<form action="manage/userOpt!login.action" method="post">
<table border="1">
<wbr><wbr><wbr><wbr><wbr> <tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td>用户名:</td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td><input type="text" name="userName"/></td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> </tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> <tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td>密码:</td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td><input type="password" name="password"/></td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> </tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> <tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td colspan="2"></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <input type="submit" value=" 确定 "/></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> </td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> </tr></wbr></wbr></wbr></wbr></wbr>
</table>
</form>
</body>
</html>
regist.jsp
<%@ page language="java" pageEncoding="UTF-8"%>
<html>
<head>
<title>用户注册页面</title>
</head>
<body>
<wbr><wbr> <h2>用户注册</h2></wbr></wbr>
<wbr><wbr> <hr></wbr></wbr>
<form action="manage/userOpt!regist.action" method="post">
<table border="1">
<wbr><wbr><wbr><wbr><wbr> <tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td>用户名:</td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td><input type="text" name="userName"/></td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> </tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> <tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td>密码:</td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td><input type="password" name="password"/></td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> </tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> <tr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <td colspan="2"></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <input type="submit" value=" 注册 "/></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> </td></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr> </tr></wbr></wbr></wbr></wbr></wbr>
</table>
</form>
</body>
</html>
1.2. 为Action配置method属性:
将Action类中的每一个处理方法都定义成一个逻辑Action方法。
<!DOCTYPE struts PUBLIC
<wbr><wbr><wbr><wbr><wbr><wbr> "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> "<a href="http://struts.apache.org/dtds/struts-2.0.dtd"><span style="color:#189a0f">http://struts.apache.org/dtds/struts-2.0.dtd</span></a>"></wbr></wbr></wbr></wbr></wbr></wbr>
<struts>
<package name="my" extends="struts-default" namespace="/manage">
<wbr><wbr><wbr><wbr><wbr><wbr> <action name="userLogin" class="org.qiujy.web.struts2.action.LoginAction" method="login"></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result name="success">/success.jsp</result></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result name="error">/error.jsp</result></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> </action></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> <action name="userRegist" class="org.qiujy.web.struts2.action.LoginAction" method="regist"></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result name="success">/success.jsp</result></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result name="error">/error.jsp</result></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> </action></wbr></wbr></wbr></wbr></wbr></wbr>
</package>
</struts>
如上,把LoginAction中的login和regist方法都配置成逻辑Action。要调用login方法,则相应的把index.jsp中表单元素的action设置为"manage/userLogin.action";要调用regist方法,把regist.jsp中表单元素的action设置为"manage/userRegist.action"。
1.3. 使用通配符映射(wildcard mappings)方式:
在struts.xml文件中配置<action…>元素时,它的name、class、method属性都可支持通配符,这种通配符的方式是另一种形式的动态方法调用。
当我们使用通配符定义Action的name属性时,相当于用一个元素action定义了多个逻辑Action:
<action name="user_*"
class="org.qiujy.web.struts2.action.UserAction" method="{1}">
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result name="success">/success.jsp</result></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> <result name="error">/error.jsp</result></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr> </action></wbr></wbr></wbr></wbr></wbr></wbr>
如上,<action name=”user_*”>定义一系列请求URL是user_*.action模式的逻辑Action。同时method属性值为一个表达式{1},表示它的值是name属性值中第一个*的值。例如:用户请求URL为user_login.action时,将调用到UserAction类的login方法;用户请求URL为user_regist.action时,将调用到UserAction类的regist方法。
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