how to remove some words from a string in java

2019-06-24 12:07发布

站内问答 / Java
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im working on android platform,I use a string variable to fill the html content after that i want to delete some words(Specifically- delete whatever words are there in between <head>..</head> tag. Any solution?

3条回答
冷血范
2楼-- · 2019-06-24 12:26 
String newHtml = oldHtml.replaceFirst("(?s)(<head>)(.*?)(</head>)","$1$3");

Explanation:

oldHtml.replaceFirst(" // we want to match only one occurrance
(?s)                   // we need to turn Pattern.DOTALL mode on
                       // (. matches everything, including line breaks)
(<head>)               // match the start tag and store it in group $1
(.*?)                  // put contents in group $2, .*? will match non-greedy,
                       // i.e. select the shortest possible match
(</head>)              // match the end tag and store it in group $3
","$1$3");             // replace with contents of group $1 and $3
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▲ chillily
3楼-- · 2019-06-24 12:42

Another solution :)

String s = "Start page <head> test </head>End Page";
StringBuilder builder = new StringBuilder(s);
builder.delete(s.indexOf("<head>") + 6, s.indexOf("</head>"));

System.out.println(builder.toString());
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Melony?
4楼-- · 2019-06-24 12:46

Try:

String input = "...<head>..</head>...";
String result = input.replaceAll("(?si)(.*<head>).*(</head>.*)","$1$2");
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