Java爬虫的相对路径转绝对路径

网上看到的，摘录如下：

@SuppressWarnings("finally")
public static String getAbsoluteURL(String baseURI, String relativePath){
String abURL=null;
try {
URI base=new URI(baseURI);//基本网页URI
URI abs=base.resolve(relativePath);//解析于上述网页的相对URL，得到绝对URI
URL absURL=abs.toURL();//转成URL
System.out.println(absURL);
abURL = absURL.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (URISyntaxException e) {
e.printStackTrace();
} finally{
return abURL;
}
}