incomeupdateservlet.java

分为经理和出纳2个权限

package com.yiboit.cfss.income;

import java.io.IOException;

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

import com.yiboit.cfss.util.StringUtil;

public class IncomeUpdateServlet extends HttpServlet {

	/**
	 * 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 {

		String incomeId = request.getParameter("incomeid");
		String income = request.getParameter("income");
		String deptname = request.getParameter("deptname");
		
		IncomeDAO dao = new IncomeDAO();
		if (!checkInput(incomeId, income, request)) {
			request.setAttribute("incomeId", incomeId);
			request.setAttribute("income", income);
			request.setAttribute("deptname", deptname);
			
			request.getRequestDispatcher("incomeUpdate.jsp").forward(request, response);
			return;
		}
		
		try {
			boolean result = dao.updateIncome(Integer.parseInt(incomeId),
					Double.parseDouble(income));
			if (result) {
				response.sendRedirect("IncomeListServlet");
			} else {

			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private boolean checkInput(String incomeId, String income,
			HttpServletRequest request) {
		boolean result = false;
		
		if (incomeId == null || incomeId.length() == 0) {
			request.setAttribute("errmsg", "Income ID is required.");
		} else if (!StringUtil.isInteger(incomeId)) {
			request.setAttribute("errmsg", "Income ID is invalid.");
		} else if (income == null || income.length() == 0) {
			request.setAttribute("errmsg", "Income is required.");
		} else if (!StringUtil.isDouble(income)) {
			request.setAttribute("errmsg", "Income is invalid.");
		} else if (income.length() > 10) {
			request.setAttribute("errmsg", "Income is too large.");
		} else {
			result = true;
		}
		
		return result;
	}

	/**
	 * 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 {
		this.doGet(request, response);
	}

}