Java Web项目中定时器的简单运用
Java Web项目中定时器的简单运用
Java Web项目中定时器的简单运用:
- import java.io.FileNotFoundException;
- import java.io.IOException;
- import java.util.Date;
- import java.util.Timer;
- import javax.servlet.ServletConfig;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import org.apache.log4j.PropertyConfigurator;
- public class InitServlet extends HttpServlet {
- private static final long serialVersionUID = -2693899729090015551L;
- public static final String FILE_SEPARATOR = System.getProperties().getProperty("file.separator");
- private static String contextPath;
- private static String serverConfig;
- private static String ftpPath;
- // 添加定时器任务
- private Timer timer;
- /**
- * @Override
- * @see javax.servlet.GenericServlet#init(javax.servlet.ServletConfig) <BR>
- * Method name: init <BR>
- * Description: please write your description <BR>
- * Remark: <BR>
- * @param config
- * @throws ServletException <BR>
- */
- @SuppressWarnings("deprecation")
- @Override
- public void init(ServletConfig config) throws ServletException {
- super.init(config);
- String prefix = config.getServletContext().getRealPath("/");
- InitServlet.contextPath = prefix;
- if(FILE_SEPARATOR.equals("\\")) {
- // 获取内容服务器配置文件的路径
- serverConfig = prefix + "\\WEB-INF\\config.properties";
- } else if(FILE_SEPARATOR.equals("/")) {
- serverConfig = prefix + "/WEB-INF/config.properties";
- }
- // 处理的是ftp文件位置,具体到哪个文件在Action中处理
- Property property = new Property(InitServlet.getServerConfig());
- // 读取path信息
- String path = null;
- try {
- path = property.getProperty("path");
- if(FILE_SEPARATOR.equals("/")) {
- // 在Linux环境中判断是否以"/"结尾
- if (!("/".equalsIgnoreCase(path.substring(path.length()-1, path.length())))) {
- path = path + "/";
- }
- } else if(FILE_SEPARATOR.equals("\\")) {
- // 在Windows环境下判断是否以"\\"结尾
- if (!("\\".equalsIgnoreCase(path.substring(path.length()-1, path.length())))) {
- path = path + "\\";
- }
- }
- } catch (FileNotFoundException e1) {
- e1.printStackTrace();
- } catch (IOException e1) {
- e1.printStackTrace();
- }
- InitServlet.ftpPath = path;
- // 创建定时器
- timer = new Timer();
- // 启动定时器任务
- Date date = new Date();
- // 设定每天凌晨2点开始
- date.setHours(CommonStateDefine.HOUR);
- timer.schedule(new DeleteRetransFolderTicker(), new Date(date.getTime()
- + 1 * 24 * 60 * 60 * 1000), 1 * 24 * 60 * 60 * 1000);
- }
- public static final String getContextPath() {
- return contextPath;
- }
- public static final String getServerConfig() {
- return serverConfig;
- }
- public static String getFtpPath() {
- return ftpPath;
- }
- }
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