如何使用Java识别URL对象的顶级域? [英] How to identify the top level domain of a URL object using java?

问题描述

给出这个:

URL u=new URL("someURL");

我如何识别URL的顶级域.

How do i identify the top level domain of the URL..

推荐答案

所以您想拥有仅限顶级域名部分?

//parameter urlString: a String
//returns: a String representing the TLD of urlString, or null iff urlString is malformed
private String getTldString(String urlString) {
    URL url = null;
    String tldString = null;
    try {
        url = new URL(urlString);
        String[] domainNameParts = url.getHost().split("\\.");
        tldString = domainNameParts[domainNameParts.length-1];
    }
    catch (MalformedURLException e) {   
    }

    return tldString;
}

让我们测试一下！

@Test 
public void identifyLocale() {
    String ukString = "http://www.amazon.co.uk/Harry-Potter-Sheet-Complete-Series/dp/0739086731";
    logger.debug("ukString TLD: {}", getTldString(ukString));

    String deString = "http://www.amazon.de/The-Essential-George-Gershwin/dp/B00008GEOT";
    logger.debug("deString TLD: {}", getTldString(deString));

    String ceShiString = "http://例子.测试";
    logger.debug("ceShiString TLD: {}", getTldString(ceShiString));

    String dokimeString = "http://παράδειγμα.δοκιμή";
    logger.debug("dokimeString TLD: {}", getTldString(dokimeString));

    String nullString = null;
    logger.debug("nullString TLD: {}", getTldString(nullString));

    String lolString = "lol, this is a malformed URL, amirite?!";
    logger.debug("lolString TLD: {}", getTldString(lolString));

}

输出:

ukString TLD: uk
deString TLD: de
ceShiString TLD: 测试
dokimeString TLD: δοκιμή
nullString TLD: null
lolString TLD: null

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