[英]Replacing url in a CSS with CSS Parser and Regex (Java)
我有這個要求,我需要在CSS中替換URL,到目前為止,我有這個代碼顯示css文件的規則:
@Override
public void parse(String document) {
log.info("Parsing CSS: " + document);
this.document = document;
InputSource source = new InputSource(new StringReader(this.document));
try {
CSSStyleSheet stylesheet = parser.parseStyleSheet(source, null, null);
CSSRuleList ruleList = stylesheet.getCssRules();
log.info("Number of rules: " + ruleList.getLength());
// lets examine the stylesheet contents
for (int i = 0; i < ruleList.getLength(); i++)
{
CSSRule rule = ruleList.item(i);
if (rule instanceof CSSStyleRule) {
CSSStyleRule styleRule=(CSSStyleRule)rule;
log.info("selector: " + styleRule.getSelectorText());
CSSStyleDeclaration styleDeclaration = styleRule.getStyle();
//assertEquals(1, styleDeclaration.getLength());
for (int j = 0; j < styleDeclaration.getLength(); j++) {
String property = styleDeclaration.item(j);
log.info("property: " + property);
log.info("value: " + styleDeclaration.getPropertyCSSValue(property).getCssText());
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
但是,我不確定是否如何實際替換URL,因為沒有太多關於CSS Parser的文檔
這是修改后的for循環:
//Only images can be there in CSS.
Pattern URL_PATTERN = Pattern.compile("http://.*?jpg|jpeg|png|gif");
for (int j = 0; j < styleDeclaration.getLength(); j++) {
String property = styleDeclaration.item(j);
String value = styleDeclaration.getPropertyCSSValue(property).getCssText();
Matcher m = URL_PATTERN.matcher(value);
//CSS property can have multiple URL. Hence do it in while loop.
while(m.find()) {
String originalUrl = m.group(0);
//Now you've the original URL here. Change it however ou want.
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.