以库的形式调用YUI Compressor

import com.yahoo.platform.yui.compressor.CssCompressor;
import org.apache.commons.io.IOUtils;
import java.io.*;

public class YUIProcessor {
    public String compressCss(String code) {
        Reader in = new InputStreamReader(IOUtils.toInputStream(code));
        try (Writer out = new StringWriter()) {
            CssCompressor compressor = new CssCompressor(in);
            compressor.compress(out, -1);
            out.flush();
            return out.toString();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "";
    }
}

追加：

yui compresser 很久没有更新，有很多的不足，已经废弃使用。