loginaction.java

该系统利用Java实现简单论坛功能

package ch11.action;

import javax.sql.DataSource;
import java.sql.Connection;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import ch11.form.*;
import ch11.util.*;
import ch11.bean.*;


public final class LoginAction extends Action{  
	public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,  
		HttpServletResponse response) throws Exception {
		//获取表单数据
   		LoginUserForm userform = (LoginUserForm) form;         
		String name = userform.getUsername();
		String psw = userform.getPassword();
		//连接数据库
   		ServletContext context = servlet.getServletContext();
		DataSource dataSource = (DataSource)context.getAttribute(Constants.DATASOURCE_KEY);						
        DB db = new DB(dataSource);
        HttpSession session = request.getSession();
        session.setMaxInactiveInterval(365*24*3600);
        //验证用户身份
		String PageForward;
		ActionMessages errors = new ActionMessages();        
        if ((!name.equals("guest"))&&(!User.checkUser(db,name,psw))) {//登录失败  
            errors.add(ActionMessages.GLOBAL_MESSAGE,
                           new ActionMessage("errors.loginFail"));
			if (!errors.isEmpty()) {
				saveErrors(request, errors);
			} 
 			PageForward="toWrong";
		}
		else{                                          //登录成功			
			session.setAttribute(Constants.SORT_LIST_KEY,Sort.Search(db));
			session.setAttribute(Constants.USERNAME_KEY,name);
 	   		PageForward="LoginSuccessed";		
		}			
		db.close();
	   	return (mapping.findForward(PageForward));					
 	}

}