editpasswordservlet.java

该系统具体分为2个部分：前台和后台。 1．前台主要用于用户进行浏览和搜索

package ynuServlet;

import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import ynuBean.EditBean;

public class EditPasswordServlet extends HttpServlet {
	
	public void init() throws ServletException {

	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		sendsql(request, response);
	}

	public void sendsql(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		HttpSession session = request.getSession();
		
		String oldpwd = request.getParameter("oldpwd");
		String newpwd = request.getParameter("newpwd");
		String repwd = request.getParameter("repwd");
		String username = (String)session.getAttribute("username");
		

		if (oldpwd != null && !oldpwd.equals("")) {
			//oldpwd = new String(oldpwd.getBytes("ISO-8859-1"), "UTF-8");
			//newpwd = new String(newpwd.getBytes("ISO-8859-1"), "UTF-8");
			//repwd = new String(repwd.getBytes("ISO-8859-1"), "UTF-8");
			//username = new String(username.getBytes("ISO-8859-1"), "UTF-8");
			
			executeSql(request,response,oldpwd, newpwd,repwd,username);
		} else {
			session.invalidate();
		}
	}

	public void executeSql(HttpServletRequest request, HttpServletResponse response,
        	String oldpwd,String newpwd,String repwd,String username)
                      throws ServletException,IOException 
    {
		response.setContentType("text/html");
		HttpSession session = request.getSession();
		ServletContext servletContext = getServletContext();
		EditBean aBean = new EditBean();
		
		String msg = aBean.editpassword(oldpwd, newpwd,repwd,username);
		session.setAttribute("message", msg);
		
		/*RequestDispatcher requestDispatcher = 
	    	servletContext.getRequestDispatcher("/EditPassword.jsp");
	    requestDispatcher.forward(request, response);*/   
		String role = request.getParameter("rule");
		String toJsp="/EditPassword.jsp";
		
		if(role.equals("admin"))
			toJsp = "/EditPassword.jsp";
		else if(role.equals("user"))
			toJsp = "/editpasswordbyuser.jsp";
	    
		RequestDispatcher dispatcher = servletContext.getRequestDispatcher(toJsp);
		//dispatcher = request.getRequestDispatcher(toJsp);
		response.setHeader("Refresh", "0.1; URL=/PesticideInfoManagement"+toJsp+""); 
		dispatcher.forward(request, response);
		 
	    // Process the HTTP Post request
    }

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}
}