I have this text :
<message id="dsds" to="[email protected]" type="video" from="test@test"><body>TESTTESTTEST</body><active xmlns="http://jabber.org"/></message>
And I want to get the part of <body></body> in this string.
In java, I m searching and found split, but it cant solve my problem. How can I get the text between <body></body> in java?
Using a Parser like SAXParser or DocumentBuilder is much preferred. You can accurately get the tags and process the data. They will be particularly handy when you have many tags to process.
Here is an example of using the Parser to read the body tag:
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
DefaultHandler handler = new DefaultHandler(){
String body = "";
boolean isBody = false;
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
if (qName.equalsIgnoreCase("body")) {
isBody = true;
}
}
@Override
public void characters(char[] ch, int start, int length) throws SAXException {
if (isBody) {
body = new String(ch, start, length);
System.out.println("body : " + body);
}
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
if (qName.equalsIgnoreCase("body")) {
isBody = false;
}
}
};
saxParser.parse(new InputSource(new StringReader("<message id=\"dsds\" to=\"[email protected]\" type=\"video\" from=\"test@test\"><body id=\"dd\">TESTTESTTEST</body><active xmlns=\"http://jabber.org\"/></message>")), handler);
use regex like this : (works for <body>asas asasa </body> as well as <body> </body>
public static void main(String[] args) {
String s = "<message id=\"dsds\" to=\"[email protected]\" type=\"video\" from=\"test@test\"><body>TESTTESTTEST</body><active xmlns=\"http://jabber.org\"/></message>";
Pattern p = Pattern.compile("<body.*>(.*?)</body>");
Matcher m = p.matcher(s);
while (m.find()) {
System.out.println(m.group(1));
}
}
O/P :
TESTTESTTEST
<body>asas asasa </body>. Please check. Also, my regex is different. And if that helps, I saw your answer and agreed with Thilo.
<body >) or attributes.Use regx package:
String htmlString = "<message id=\"dsds\" to=\"[email protected]\" type=\"video\" from=\"test@test\"><body>TESTTESTTEST</body><active xmlns=\"http://jabber.org\"/></message>";
String bodyText="";
Pattern p = Pattern.compile("<body.*>(.*?)</body.*>");
Matcher m = p.matcher(htmlString);
if (m.find()) {
bodyText = m.group(1);
}
System.out.println(bodyText);
OUTPUT: TESTTESTTEST
In that specific case, I'd recommend you to use regular expressions with Matcher
Possible solution: Java regex to extract text between tags
You can write the code like this-
String s = "<message id=\"dsds\" to=\"[email protected]\" type=\"video\" from=\"test@test\"><body>TESTTESTTEST</body><active xmlns=\"http://jabber.org\"/></message>";//Use '/' character as escape for "
int firstIndex = s.indexOf("<body>");
int lastIndex = s.indexOf("</body>");
System.out.println(s.substring(firstIndex+6, lastIndex));
And it will print the expected result.
Answer is already given for solving it through regex (though XML parser might have been the better choice).
Giving a simple suggestion to modify the regex proposed in above solutions:
Regex proposed: (<body.*>(.*?)</body.*>) => This regex is greedy.
Non greed regex: <body[^>]*>(.*?)</body[^>]*>
You can make it non-greedy which will lead to improvement in running time. The problem with original regex is that .* will continue to match till the end of string and then it will backtrack. "[^>]" will stop as soon as it sees the right angle bracket. I ran a simple test comparing both the regex. Greedy one takes 3 times the time taken by non-greedy.
