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package jar.util;import java.io.BufferedReader;
import java.io.FileReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;public class fileUtil
{    public boolean RegEx(String regEx, String line)
    {
        Pattern pattern;        Matcher matcher;        pattern = Pattern.compile(regEx);        matcher = pattern.matcher(line);        return matcher.matches();    }    public String getPackageContent(String regEx, String line)
    {
        Pattern pattern;        Matcher matcher;        pattern = Pattern.compile(regEx);        matcher = pattern.matcher(line);        matcher.matches();        return matcher.group(1);    }    public String getPkg(String fileName)
    {
        String pkg = null;
        boolean ifIsInTheC = false;
        try
        {
            FileReader in = new FileReader(fileName);
            BufferedReader bf = new BufferedReader(in);
            String line = null;
            while ((line = bf.readLine()) != null)
            {
                if (line.equals(""))
                {
                    continue;
                }
                if (RegEx("\\s*.*\\*+/", line))
                {
                    ifIsInTheC = false;
                    continue;
                }
                if (ifIsInTheC)
                {
                    continue;
                }
                if (RegEx("/\\**[^/]$", line))
                {
                    ifIsInTheC = true;
                    continue;
                }
                if (RegEx("\\s*/\\**/", line))
                {
                    continue;
                }                if (RegEx("\\s*package(.*)\\s*;\\s*", line))
                {
                    pkg = getPackageContent("\\s*package(.*)\\s*;\\s*", line);
                    System.out.println("包结构是：" + pkg);
                    return pkg;                }                if (RegEx("\\s*class\\s+.*", line)
                        || RegEx("\\s*.*\\s+class\\s+.*", line))
                {
                    return pkg;
                    // System.out.println(line);
                    // do something
                }                // System.out.println(line);
            }        }
        catch (Exception e)
        {
            // TODO: handle exception
        }
        return pkg;
    }    /**
     * 
     * 
     */
    public static void main(String[] args)
    {        fileUtil fff = new fileUtil();        String pkg = fff.getPkg("d:/MyPCTest.java");        System.out.println(pkg);    }
}