是否有一个好方法从Java字符串中删除HTML ?一个简单的正则表达式
replaceAll("\\<.*?>", "")
会起作用,但有些东西像&将不能正确地转换,并且两个尖括号之间的非html将被删除(即。*?在正则表达式中将消失)。
是否有一个好方法从Java字符串中删除HTML ?一个简单的正则表达式
replaceAll("\\<.*?>", "")
会起作用,但有些东西像&将不能正确地转换,并且两个尖括号之间的非html将被删除(即。*?在正则表达式中将消失)。
当前回答
我知道这个问题已经有一段时间没有被问到了,但我找到了另一个解决方案,这对我来说很有效:
Pattern REMOVE_TAGS = Pattern.compile("<.+?>");
Source source= new Source(htmlAsString);
Matcher m = REMOVE_TAGS.matcher(sourceStep.getTextExtractor().toString());
String clearedHtml= m.replaceAll("");
其他回答
我的5美分:
String[] temp = yourString.split("&");
String tmp = "";
if (temp.length > 1) {
for (int i = 0; i < temp.length; i++) {
tmp += temp[i] + "&";
}
yourString = tmp.substring(0, tmp.length() - 1);
}
接受的答案并不适用于我所指出的测试用例:“a < b or b > c”的结果是“a b or b > c”。
所以,我用TagSoup代替。下面是一个对我的测试用例(以及其他一些测试用例)有效的示例:
import java.io.IOException;
import java.io.StringReader;
import java.util.logging.Logger;
import org.ccil.cowan.tagsoup.Parser;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
/**
* Take HTML and give back the text part while dropping the HTML tags.
*
* There is some risk that using TagSoup means we'll permute non-HTML text.
* However, it seems to work the best so far in test cases.
*
* @author dan
* @see <a href="http://home.ccil.org/~cowan/XML/tagsoup/">TagSoup</a>
*/
public class Html2Text2 implements ContentHandler {
private StringBuffer sb;
public Html2Text2() {
}
public void parse(String str) throws IOException, SAXException {
XMLReader reader = new Parser();
reader.setContentHandler(this);
sb = new StringBuffer();
reader.parse(new InputSource(new StringReader(str)));
}
public String getText() {
return sb.toString();
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
for (int idx = 0; idx < length; idx++) {
sb.append(ch[idx+start]);
}
}
@Override
public void ignorableWhitespace(char[] ch, int start, int length)
throws SAXException {
sb.append(ch);
}
// The methods below do not contribute to the text
@Override
public void endDocument() throws SAXException {
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
}
@Override
public void endPrefixMapping(String prefix) throws SAXException {
}
@Override
public void processingInstruction(String target, String data)
throws SAXException {
}
@Override
public void setDocumentLocator(Locator locator) {
}
@Override
public void skippedEntity(String name) throws SAXException {
}
@Override
public void startDocument() throws SAXException {
}
@Override
public void startElement(String uri, String localName, String qName,
Attributes atts) throws SAXException {
}
@Override
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
}
}
或者,可以使用HtmlCleaner:
private CharSequence removeHtmlFrom(String html) {
return new HtmlCleaner().clean(html).getText();
}
另一种方法是使用javax.swing.text.html.HTMLEditorKit来提取文本。
import java.io.*;
import javax.swing.text.html.*;
import javax.swing.text.html.parser.*;
public class Html2Text extends HTMLEditorKit.ParserCallback {
StringBuffer s;
public Html2Text() {
}
public void parse(Reader in) throws IOException {
s = new StringBuffer();
ParserDelegator delegator = new ParserDelegator();
// the third parameter is TRUE to ignore charset directive
delegator.parse(in, this, Boolean.TRUE);
}
public void handleText(char[] text, int pos) {
s.append(text);
}
public String getText() {
return s.toString();
}
public static void main(String[] args) {
try {
// the HTML to convert
FileReader in = new FileReader("java-new.html");
Html2Text parser = new Html2Text();
parser.parse(in);
in.close();
System.out.println(parser.getText());
} catch (Exception e) {
e.printStackTrace();
}
}
}
ref:从文件中删除HTML标记,只提取文本
值得注意的是,如果您试图在Service Stack项目中完成此操作,那么它已经是一个内置的字符串扩展
using ServiceStack.Text;
// ...
"The <b>quick</b> brown <p> fox </p> jumps over the lazy dog".StripHtml();