51 lines
1.5 KiB
Java
51 lines
1.5 KiB
Java
package ctbrec.io;
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import org.jsoup.Jsoup;
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import org.jsoup.nodes.Document;
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import org.jsoup.nodes.Element;
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import org.jsoup.select.Elements;
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public class HtmlParser {
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private HtmlParser() {}
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/**
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* Returns the tag selected by the given selector or null
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*
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* @param html
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* @param charset
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* @param cssSelector
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* @return the tag selected by the given selector or null
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*/
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public static Element getTag(String html, String cssSelector) {
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Elements selection = getTags(html, cssSelector);
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if (selection.isEmpty()) {
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throw new HtmlParserException("Bad selector. No element selected by " + cssSelector);
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}
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Element tag = selection.first();
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return tag;
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}
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public static Elements getTags(String html, String cssSelector) {
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Document doc = Jsoup.parse(html);
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return doc.select(cssSelector);
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}
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/**
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*
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* @param html
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* @param charset
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* @param cssSelector
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* @return The text content of the selected element or an empty string, if nothing has been selected
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*/
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public static String getText(String html, String cssSelector) {
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Document doc = Jsoup.parse(html);
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Elements selection = doc.select(cssSelector);
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if (selection.isEmpty()) {
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throw new HtmlParserException("Bad selector. No element selected by " + cssSelector);
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}
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Element elem = selection.first();
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return elem.text();
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}
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}
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