Java tutorial
/* * Copyright (c) 2008-2013 Computer Network Information Center (CNIC), Chinese Academy of Sciences. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ package cn.vlabs.umt.ui.servlet; import java.io.IOException; import java.io.PrintWriter; import java.util.Date; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.time.DateFormatUtils; import org.apache.commons.lang.time.DateUtils; import org.springframework.beans.factory.BeanFactory; import cn.vlabs.duckling.common.crypto.HexUtil; import cn.vlabs.duckling.common.transmission.PublicKeyEnvelope; import cn.vlabs.umt.ui.Attributes; public class UMTPublicKeyServiceServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { UMTCredential cred = (UMTCredential) factory.getBean("UMTCredUtil"); PublicKeyEnvelope opublickey = new PublicKeyEnvelope(); opublickey.setAppId(cred.getUMTId()); Date month = DateUtils.addMonths(new Date(cred.getCreateTime()), 1); opublickey.setValidTime(DateFormatUtils.format(month, "yyyy-MM-dd hh:mm:ss")); opublickey.setPublicKey(HexUtil.toHexString(cred.getUMTKey().getRSAPublic().getEncoded())); response.setContentType("text/xml"); response.setCharacterEncoding("UTF-8"); PrintWriter out = response.getWriter(); out.write(opublickey.toXML()); out.flush(); out.close(); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } public void init() throws ServletException { factory = (BeanFactory) getServletContext().getAttribute(Attributes.APPLICATION_CONTEXT_KEY); } private BeanFactory factory; }