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文件大小: 5mb
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上传时间: 2009-04-17
详细说明： package org.jvk.chatroom.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public abstract class BaseServlet extends HttpServlet { public final static String USER = "user"; private static final longserialVersionUID = 520131401655L; protected Log log = LogFact ory.getLog(this.getClass()); @Override public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { execute(request, response); } @Override public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { execute(request, response); } /** *由子类实现,处理GET和POST请求 * *@paramrequest *@paramresponse *@throwsServletException *@throwsIOException */ publicab stract void execute(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException; protected final String getValue(HttpServletRequest request, String param) { String str = request.getParameter(param); if (str == null) return""; return str; } private static byte[] lock = new byte[0]; protected final void setNoCache(HttpServletRequest request, HttpServletResponse response) { synchronized (lock) { if (request.getProtocol().compareTo("HTTP/1.0") == 0) response.setHeader("Prama", "no-cache"); else if (request.getProtocol().compareTo("HTTP/1.1") == 0) response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires", 0); } } } ...展开收缩
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