registeraction.java

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package com.bookshop.web.action;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.bookshop.dao.UserDAO;



public class RegisterAction {
	public void execute(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {
		String action=request.getParameter("action");
		String username = new String(request.getParameter("username").getBytes("ISO-8859-1"),"UTF-8");
		String pw = request.getParameter("pw");	
        UserDAO userDao=new UserDAO();
		response.setHeader("Cache-Control", "no-cache");
        PrintWriter out = response.getWriter();
        if("add".equals(action)){
        	String checkname=null;
        	checkname=userDao.getUserName(username);
        	System.out.println(checkname+username);
        	if(checkname==null){
        		userDao.insertUser(username,pw);
        		out.println("注册成功！");
        	}else{
        		out.println("注册失败!用户名已存在，重新输入用户名");
        		
        	}
        }
		out.close();
	}
}