logininterceptor.java

学生成绩管理软件 成绩单{录入,查找,删除,保存到文件,从文件读入,修改,统计平均分...} 数据方面可以从以下方面考虑: 可以使用ArrayList保存同类型的记录.参见教材13.1.2(P

package sdau.lyxs.interceptor;
import com.opensymphony.xwork2.ActionSupport;
import sdau.lyxs.action.*;
import com.opensymphony.xwork2.interceptor.*;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionContext;
import java.util.*;
import com.opensymphony.xwork2.Action;
public class LoginInterceptor extends AbstractInterceptor{

    public String intercept(ActionInvocation invocation) throws Exception
    {
        ActionSupport actionsupport=new ActionSupport();
        //StudentsAddAction action = (StudentsAddAction)invocation.getAction();
        ActionContext ctx=invocation.getInvocationContext();
        Map session=ctx.getSession();
        String username=(String)session.get("username");
//  if(username.equals("admin"))
       if (username != null )
        {
            return invocation.invoke();
        }
        else
        {
            ctx.put("tip",actionsupport.getText("login.required"));
            return Action.LOGIN;
        }
    }
}