struts2 intercepter简单例子

最新推荐文章于 2022-04-24 13:50:01 发布

原创最新推荐文章于 2022-04-24 13:50:01 发布 · 171 阅读

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本文介绍了一个简单的Struts2应用程序实例，通过自定义拦截器实现了用户权限验证。该实例包括了注册页面、登录页面、登录操作类及自定义拦截器的实现细节。

http://weizhilizhiwei.iteye.com/blog/1005210

玩了一天终于把struts2的intercepter搞明白了，有那么点小兴奋，呵呵。

下面把俺的成果分享一下：

1.在注册页面中（index.jsp）注册一下：

session.setAttribute("user","lzw");

2.在登录界面（login.jsp）登录：

3.登录类：LoginAction.java

package com.lzw.action; import java.util.Map; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; public class LoginAction extends ActionSupport { 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; } @Override public String execute() throws Exception { System.out.println("开始执行execute()"); Map<String,Object> map = ActionContext.getContext().getSession(); String user = (String) map.get("user"); System.out.println("The user'name is ---------- "+user); return SUCCESS; } }

4.success.jsp页面

welcome ${userName} to struts2 world。

5.拦截器类：LoginInterceper.java

package com.lzw.intercepter; import java.util.Map; import com.opensymphony.xwork2.Action; import com.opensymphony.xwork2.ActionInvocation; import com.opensymphony.xwork2.interceptor.AbstractInterceptor; public class LoginIntercepter extends AbstractInterceptor { @Override public String intercept(ActionInvocation invocation) throws Exception { Map<String, Object> session = invocation.getInvocationContext() .getSession(); String user = (String) session.get("user"); System.out.println("11---------------- " + user); if ("".equals(user)||null==user) { System.out.println("22---------------- "); return Action.INPUT; } else { System.out.println(" 33---------------- " + user); return invocation.invoke(); } } }

6.struts2配置文件struts.xml

<!DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd">

<interceptor-stack name="loginStack">

<interceptor-ref name="authority" />

<interceptor-ref name="defaultStack" />

</interceptor-stack>

</interceptors>

<default-interceptor-ref name="loginStack" />

<result>/success.jsp</result>

<result name="input" type="redirect">/login.jsp</result>