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172 *
173 * @param props 属性
174 */
175 private void loadDrivers(Properties props) {
176 String driverClasses = props.getProperty("drivers");
177 StringTokenizer st = new StringTokenizer(driverClasses);
178 while (st.hasMoreElements()) {
179 String driverClassName = st.nextToken().trim();
180 try {
181 Driver driver = (Driver)
182 Class.forName(driverClassName).newInstance();
183 DriverManager.registerDr iver(driver);
184 drivers.addElement(driver);
185 log("成功注册JDBC驱动程序\\\" + driverClassName);
186 }
187 catch (Exception e) {
188 log("无法注册JDBC驱动程序: " +
189 driverClassName + ", 错误: " + e);
190 }
191 }
192 }
193
194 /**
195 * 将文本信息写入日志文件
196 */
197 private void log(String msg) {
198 log.println(new Date() + ": " + msg);
199 }
200
201 /**
202 * 将文本信息与异常写入日志文件
203 */
204 private void log(Throwable e, String msg) {
205 log.println(new Date() + ": " + msg);
206 e.printStackTrace(log);
207 }
208
209 /**
210 * 此内部类定义了一个连接池.它能够根据要求创建新连接,直到预定的最\\r
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