有三种方法可以使一个Action处理多个请求
- 动态方法调用DMI
- 定义逻辑Acton
- 在配置文件中使用通配符
这文章就谈论一下定义逻辑Action
这里主要关注的是struts.xml配置文件，一般情况下，我们会这样编写一个Action,当请求的名字为login的时候，就会调用LoginAction的类里面的execute方法
<action name="login" class="struts2.action.LoginAction"> <result name="success">/success.jsp</result> <result name="input">/login2.jsp</result> </action>
在这里我们只需要多个一个method的属性就能实现处理多请求，如下图，这样我们就可以在实现类DMIAction中分别请求两个不同的方法login和register实现不同的逻辑
<action name="D_Login" class="struts2.action.DMIAction" method="login"> <result name="success">RegisterSuccess.jsp</result> </action> <action name="D_Register" class="struts2.action.DMIAction" method="register"> <result name="success">RegisterSuccess.jsp</result> </action>
下面是完整例子
1.两个页面分别请求两个不同的请求，D_Login和D_Register
//DMI_login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib prefix="s" uri="/struts-tags"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <h4>请输入</h4> <s:form action="D_Login"> <s:textfield name="username" label="User Name" /> <s:password name="password" label="Password" /> <s:submit value="Login" /> </s:form> </body> </html>
//DMI_register.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib prefix="s" uri="/struts-tags"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <h4>注册</h4> <s:form action="D_Register"> <s:textfield name="username" label="User Name" /> <s:password name="password" label="Password" /> <s:submit value="Register" /> </s:form> </body> </html>
2.struts.xml配置
<?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> <constant name="struts.enable.DynamicMethodInvocation" value="true"/> <package name="default" extends="struts-default"> <action name="D_Login" class="struts2.action.DMIAction" method="login"> <result name="success">RegisterSuccess.jsp</result> </action> <action name="D_Register" class="struts2.action.DMIAction" method="register"> <result name="success">RegisterSuccess.jsp</result> </action> </package> </struts>
3.Action类
package struts2.action; import java.util.Map; import com.opensymphony.xwork2.ActionSupport; public class DMIAction extends ActionSupport { /** * */ private static final long serialVersionUID = 1L; public String login() { return SUCCESS; } public String register() { return SUCCESS; } private String username; private String password; 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; } private Map sessionMap; private Map applicationMap; public void setSession(Map sessionMap) { this.sessionMap = sessionMap; } public void setApplication(Map applicationMap) { this.applicationMap = applicationMap; } }