7.10--SSH学习之Struts2 Action配置

在说struts2之前当然要先下载好其框架了，官网有推荐 压缩包含： apps：使用struts开发的一些demo src：一个示例 docs：文档 lib：jar包

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三种创建Action的方式

创建普通类，编写execute()方法创建Action类，实现Action接口创建Action类，继承ActionSupport类 示例一： public class FirstAction { public String execute()throws Exception{ System.out.println("in FirstAction method execute()"); return "success"; } }

示例二：

public class SecondAction implements Action { @Override public String execute() throws Exception { // TODO Auto-generated method stub System.out.println("in SecondAction method execute()"); return SUCCESS; } }

示例三：

public class ThirdAction extends ActionSupport { @Override public String execute() throws Exception { // TODO Auto-generated method stub System.out.println("in ThirdAction method execute()"); return "success"; } }

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三种调用Action方法的方式

调用execute()方法响应客户端请求动态方法调用调用指定名字的方法响应客户端请求， 一个Action 类可包含多个方法，最好是3-5个 struts.xml <!-- 动态方法盗用 --> <constant name="struts.enable.DynamicMethodInvocation" value="true" /> <constant name="struts.devMode" value="true" /> <package name="default" namespace="/" extends="struts-default"> <!-- 第一种调用方式，execute()方法，如后面有method="",则不调用默认execute().而调用 method指定的方法 --> <action name="first" class="com.su.web.action.FirstAction"> <result type="dispatcher" name="success">/success.jsp</result> </action> <action name="stu" class="com.su.web.action.StudentAction"> <result type="dispatcher" name="success">/success.jsp</result> </action> <!-- 第二种调用方式，动态调用 stu!addStudent,调用StudentAction类中的addStudent方法--> <action name="addStu" class="com.su.web.action.StudentAction" method="addStudent"> <result type="dispatcher" name="success">/success.jsp</result> </action> <action name="updateStu" class="com.su.web.action.StudentAction" method="updateStudent"> <result type="dispatcher" name="success">/success.jsp</result> </action> <action name="deleteStu" class="com.su.web.action.StudentAction" method="deleteStudent"> <result type="dispatcher" name="success">/success.jsp</result> </action> <!-- 第三种调用方式，调用指定的方法 ，stu_addStudent,后面的{1}中为addStudent，也称为占位符调用--> <action name="stu_*" class="com.su.web.action.StudentAction" method="{1}"> <result type="dispatcher" name="success">/success_{1}.jsp</result> </action> <!-- 后缀有两个时，可往后加 <action name="stu_*_*" class="com.su.web.action.StudentAction" method="{1}_{2}"> <result type="dispatcher" name="success">/success_{1}_{2}.jsp</result> </action> -->

示例一：

<form action="first" method="post"> <input type="submit" value="提交"> </form>

示例二：

<form action="stu!addStudent" method="post"> <input type="submit" value="提交"> </form>

示例三：

form action="stu_addStudent" method="post"> <input type="submit" value="提交"> </form>

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三种接收表单数据的方式

Action的普通属性传参Action对象属性传参ModekDriven传参（缺点是只能由一个实体）

示例一：

public class UserAction extends ActionSupport { //普通属性传参 private String userName; private String userPwd; public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getUserPwd() { return userPwd; } public void setUserPwd(String userPwd) { this.userPwd = userPwd; } public String execute() throws Exception{ System.out.println("in execute!!!"); System.out.println(userName); System.out.println(userPwd); return "success"; } }

示例二：

public class UserTwoAction extends ActionSupport{ //对象属性传参 private User user; public User getUser() { return user; } public void setUser(User user) { this.user = user; } public String execute() throws Exception{ System.out.println("in execute!!!"); System.out.println(user.getUserName()); System.out.println(user.getUserPwd()); ActionContext.getContext().put("message", "！！！密码或用户名错误！！！"); return "success"; } public String userlogin() throws Exception{ System.out.println("in userlogin!!!"); System.out.println(user.getUserName()); System.out.println(user.getUserPwd()); if(user.getUserName().equals("susu") && user.getUserPwd().equals("1111")){ ActionContext.getContext().put("message", "！！！登录成功！！！"); return "success"; } return "nextAction"; } }

示例三：

//ModelDriven传参 private User user= new User(); public User getUser() { return user; } public void setUser(User user) { this.user = user; } //@Override public User getModel() { // TODO Auto-generated method stub return user; } public String userlogin() throws Exception{ System.out.println("in userlogin!!!"); System.out.println(user.getUserName()); System.out.println(user.getUserPwd()); return "success"; } }

表单JSP页面

<body> <form action="user_userlogin" method="post"> <!-- 普通属性传参 --> <!-- 用户名：<input type="text" name="userName"> 密  码：<input type="password" name="userPwd"> <input type="submit" value="登录">--> <!-- 对象属性传参，表单元素的名字就是：Action的属性名.Action属性的属性名 --> <!-- 用户名：<input type="text" name="user.userName"> 密  码：<input type="password" name="user.userPwd"> <input type="submit" value="登录">--> 用户名：<input type="text" name="userName"> 密  码：<input type="password" name="userPwd"> <input type="submit" value="登录"> </form> </body>

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四种Action请求下一个资源的方法

dispatcher转发，Action To JSPchain转发，Action To Action redirect重定向，Action To JSPredirectAction 重定向，Action To Action

PS:转发：在原JSP页面提交的用户名和密码之类的信息不丢失     重定向:则丢失

示例一：

<action name="userTwo" class="com.su.web.action.UserTwoAction" > <result type="dispatcher" name="success">/indexRedict.jsp</result> </action>

示例二：

<action name="userTwo_*" class="com.su.web.action.UserTwoAction" method="{1}"> <result type="chain" name="nextAction">userTwo</result> <result type="dispatcher" name="success">/success_user.jsp</result> </action>

示例三：

<action name="userTwo_*" class="com.su.web.action.UserTwoAction" method="{1}"> <result type="redirectAction" name="nextAction">userTwo</result> <result type="redirect" name="success">/success_user.jsp</result> </action>

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Author：su1573