学步园

读properties文件的时候，出现了或多或少的奇怪问题，这里把最终成功的方式描述一下。

PropUtil工具类

public class PropUtil {

	private String filePath = null;

	public PropUtil(String fileName) {
		this.filePath = getClass().getClassLoader().getResource("/").getPath();
		filePath = filePath.substring(1, filePath.length() - 8) + fileName;

		// fixed tomcat readpath problem dml@2012.9.12
		filePath = filePath.replaceAll("%20", " ");
	}

	public Properties getProp() {
		Properties prop = new Properties();
		try {
			InputStream in = new BufferedInputStream(new FileInputStream(
					filePath));
			prop.load(in);
			in.close();

		} catch (Exception err) {
			err.printStackTrace();
		}
		return prop;
	}
}

调用的时候，直接实例化这个工具类对象即可

public static Connection getConnect() {
		PropUtil pu = new PropUtil("DB.properties");
		Properties p = pu.getProp();
		Connection con = null;
		try {
			String url = p.getProperty("url");
			String Driver = p.getProperty("driver");
			String user = p.getProperty("userName");
			String pwd = p.getProperty("password");
			Class.forName(Driver);
			con = DriverManager.getConnection(url, user, pwd);
			if (con == null) {
				System.out.println("can not find con");
			}
		} catch (Exception e) {
			System.out.println("conn bad!");
			e.printStackTrace();
		}
		return con;
	}

以上是在tomcat中最终配置的方式。