useraction.java

这个是j2eejava web 编程精要十五讲的全部源码。对学习java web编程的人来说是很能得的资料

package user;

import java.io.PrintWriter;
import java.util.ArrayList;

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;


public class UserAction extends Action {
	
	 private static final String CONTENT_TYPE = "text/html; charset=GB2312";
	 String mark = new String();
	
	
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws Exception {
		
		   UserForm userForm = (UserForm) form;
		 
		    request.setCharacterEncoding("gb2312"); //设定请求的编码类型

	        response.setContentType(CONTENT_TYPE);
	        PrintWriter out = response.getWriter();

	        HttpSession session = request.getSession();

	        ArrayList list = new ArrayList();

	        String username = userForm.getUsername();
	        if(username!=null)
	        	username = new String(username.getBytes("iso8859_1"), "gb2312");
	        if (username == null) username = "";
	        
	        String password = userForm.getPassword();
	        if(password != null)
	        password = new String(password.getBytes("iso8859_1"), "gb2312");
	        
	        //password = password.trim();
	        System.out.println("The password is:"+password);

	        String[] check = request.getParameterValues("check");

	        list.add(username);
	        list.add(password);


	        session.setAttribute("name",username);


	        //把从请求中取得执行类型
	        String command = userForm.getCommand();
	        command = command.trim();
	        command = new String(command.getBytes("iso8859_1"), "gb2312");
	        System.out.println("要执行的操作是：" + command);

	        final String success = "success.jsp";
	        final String fail = "fail.jsp";
	        String pwd = new String();
	        

	          //登录操作
	        if (command.equals("login")) {
	           // if(!username.equals("")) {

	                ArrayList arr = UserDAO.verify(username, password);
	                session.setAttribute("username", username);

	                if(arr.size()>1)  {
	                    pwd = (String) arr.get(1);
	                    pwd = pwd.trim();
	                     System.out.println("The pwd is:"+pwd);

	                   if (pwd.equals(password)) {


	                                session.removeAttribute("logon");
	                                session.setAttribute("logon", arr);
	                               //response.sendRedirect("main.jsp");
	                                
	                                mark = "mainPage";


	                    } else {
	                        out.println("<script language=javascript>alert('密码不正确！')");
	                       out.println("location.href='login.jsp'</script>");
	                        
	                        out.close();
	                        
	                        //mark = "Login";
	                    }
	                }
	                else {
	                    out.println("<script language=javascript>alert('密码不正确！')");
	                     out.println("location.href='login.jsp'</script>");
	                      
	                       out.close();
	                       
	                      // flag = "Login";

	                }
	             /*else {
	                out.println("<script language=javascript>alert('请输入用户名！')");
	                    out.println("location.href='login.jsp'</script>");
	                    out.close();
	            }
	            */
	        }

	        //添加用户信息
	        if (command.equals("insert")) {

	            boolean bool = UserDAO.insert(list);

	            if (bool) {
	                out.println("<script language=javascript>alert('注册成功！')");
	                out.println("window.close()</script>");
	                out.close();

	            } else {
	                out.println("<script language=javascript>alert('注册失败！')");
	                out.println("window.close()</script>");
	                out.close();

	            }
	        }

		 
		 
		 
		return mapping.findForward(mark);
	}
}