countcharservlet.java

用JSP开发的考勤系统 编译器为myeclipse

package test;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CountCharServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public CountCharServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doProcess(request,response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doProcess(request,response);
	}
	
	public void doProcess(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html");
		response.setCharacterEncoding("UTF-8");
		String inputString = request.getParameter("inputChars") == null ? 
								"":request.getParameter("inputChars");
		int count = new CountBean().countChars(inputString);
		
		if(count < 0)
			response.sendRedirect("error.jsp");
		else{
			request.setAttribute("count", count);
			request.setAttribute("inputString", inputString);
			request.getRequestDispatcher("index.jsp").forward(request, response);
		}
	}
	/*if(request.getParameter("inputChars") != null){
	inputString  = request.getParameter("inputChars");
	char[] chars = request.getParameter("inputChars").toLowerCase().toCharArray();
	for(int i=0;i<chars.length;i++){
  		if(chars[i] >= 'a' && chars[i] <='z')
  			count++;
  		else{
  			response.sendRedirect("error.jsp");
  			return;
  		}
  	}
}*/

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}