从命令窗口读取路径

private String getRelativePath() {
    	String relativePath = "";

		try {
			String OS = System.getProperty("os.name").toLowerCase();
			if (OS.indexOf("windows xp") > -1) {
				Process p = null;
				p = Runtime.getRuntime().exec("cmd /c set");
				BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
				String line;
				while ((line = br.readLine()) != null) {
					int i = line.indexOf("=");
					if (i > -1) {
						String key = line.substring(0, i);
						String value = line.substring(i + 1);
						if (DIR_LOG.equalsIgnoreCase(key)) {
							relativePath = value;	
						}
					}
				}
			}
		} catch (Exception ex) {
		}
		return relativePath;
	}

我所用的IDE是IBM的RAD，需要重启RAD才能生效