Java 中的CSS 解析器選項
簡介
探索 CSS 解析器選項
一個值得注意的選項是CSSParser。它的錯誤回饋功能很有價值，這裡有一個修改後的程式碼範例供您參考：
<code class="java">package com.dlogic;
import com.steadystate.css.parser.CSSOMParser;
import org.w3c.css.sac.InputSource;
import org.w3c.dom.css.CSSStyleSheet;
import org.w3c.dom.css.CSSRuleList;
import org.w3c.dom.css.CSSRule;
import org.w3c.dom.css.CSSStyleRule;
import org.w3c.dom.css.CSSStyleDeclaration;
import java.io.*;
// Main class
public class CSSParserTest
{
public static void main(String[] args) {
CSSParserTest oParser = new CSSParserTest();
if (oParser.Parse("design.css")) {
System.out.println("Parsing completed OK");
} else {
System.out.println("Unable to parse CSS");
}
}
public boolean Parse(String cssfile)
{
FileOutputStream out = null;
PrintStream ps = null;
boolean rtn = false;
try
{
// Access CSS file as a resource
InputStream stream = oParser.getClass().getResourceAsStream(cssfile);
// Create log file
out = new FileOutputStream("log.txt");
if (out != null)
{
ps = new PrintStream(out);
System.setErr(ps); // Redirect stderr to log file
} else {
return rtn;
}
// Parse CSS file
InputSource source = new InputSource(new InputStreamReader(stream));
CSSOMParser parser = new CSSOMParser();
CSSStyleSheet stylesheet = parser.parseStyleSheet(source, null, null);
// Inspect CSS DOM
CSSRuleList ruleList = stylesheet.getCssRules();
ps.println("Number of rules: " + ruleList.getLength());
for (int i = 0; i < ruleList.getLength(); i++)
{
CSSRule rule = ruleList.item(i);
if (rule instanceof CSSStyleRule)
{
CSSStyleRule styleRule = (CSSStyleRule)rule;
ps.println("selector:" + i + ": " + styleRule.getSelectorText());
CSSStyleDeclaration styleDeclaration = styleRule.getStyle();
for (int j = 0; j < styleDeclaration.getLength(); j++)
{
String property = styleDeclaration.item(j);
ps.println("property: " + property);
ps.println("value: " + styleDeclaration.getPropertyCSSValue(property).getCssText());
ps.println("priority: " + styleDeclaration.getPropertyPriority(property));
}
}
}
if (out != null) out.close();
if (stream != null) stream.close();
rtn = true;
}
catch (IOException ioe)
{
System.err.println ("IO Error: " + ioe);
}
catch (Exception e)
{
System.err.println ("Error: " + e);
}
finally
{
if (ps != null) ps.close();
}
return rtn;
}
}</code>測試CSS 解析器
要測試解析器，請放置一個CSS在來源目錄中建立名為「design.css」的檔案並執行CSSParserTest 的main 方法。輸出將記錄到“log.txt”並包含有關 CSS 規則和样式的詳細資訊。以上是如何選擇 Java 中最好的 CSS 解析器？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
