StingUtil

良帅 — Wed, 12 May 2010 14:04:00 GMT

摘要: JAVA StringUitl Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> import java.io.IOException; import java.io... 阅读全文

良帅 2010-05-12 22:04 发表评论

FileUtil

良帅 — Wed, 12 May 2010 14:03:00 GMT

JAVA FileUtil

import java.io. * ;

/**
* FileUtil. Simple file operation class.
*
* @author BeanSoft
*
*/
public class FileUtil {
     /**
     * The buffer.
      */
     protected static byte buf[] = new byte [ 1024 ];

     /**
     * Read content from local file. FIXME How to judge UTF-8 and GBK, the
     * correct code should be: FileReader fr = new FileReader(new
     * InputStreamReader(fileName, "ENCODING")); Might let the user select the
     * encoding would be a better idea. While reading UTF-8 files, the content
     * is bad when saved out.
     *
     * @param fileName -
     *            local file name to read
     * @return
     * @throws Exception
      */
     public static String readFileAsString(String fileName) throws Exception {
        String content = new String(readFileBinary(fileName));

         return content;
    }
     /**
     * ��d��文�g�q�返回�ؓ�l�定字符集的字符�?
     * @param fileName
     * @param encoding
     * @return
     * @throws Exception
      */
     public static String readFileAsString(String fileName, String encoding) throws Exception {
        String content = new String(readFileBinary(fileName), encoding);

         return content;
    }
     /**
     * ��d��文�g�q�返回�ؓ�l�定字符集的字符�?
     * @param fileName
     * @param encoding
     * @return
     * @throws Exception
      */
     public static String readFileAsString(InputStream in) throws Exception {
        String content = new String(readFileBinary(in));

         return content;
    }

     /**
     * Read content from local file to binary byte array.
     *
     * @param fileName -
     *            local file name to read
     * @return
     * @throws Exception
      */
     public static byte [] readFileBinary(String fileName) throws Exception {
        FileInputStream fin = new FileInputStream(fileName);
         return readFileBinary(fin);
    }
     /**
     * 从输入流��d��数据��Z��q�制字节数组.
     * @param streamIn
     * @return
     * @throws IOException
      */
     public static byte [] readFileBinary(InputStream streamIn) throws IOException {
        BufferedInputStream in = new BufferedInputStream(streamIn);

        ByteArrayOutputStream out = new ByteArrayOutputStream( 10240 );

         int len;
         while ((len = in.read(buf)) >= 0 )
            out.write(buf, 0 , len);
        in.close();

         return out.toByteArray();
    }

     /**
     * Write string content to local file.
     *
     * @param fileName -
     *            local file name will write to
     * @param content
     *            String text
     * @return true if success
     * @throws IOException
      */
     public static boolean writeFileString(String fileName, String content)
             throws IOException {
        FileWriter fout = new FileWriter(fileName);
        fout.write(content);
        fout.close();
         return true ;
    }

     /**
     * Write string content to local file using given character encoding.
     *
     * @param fileName -
     *            local file name will write to
     * @param content
     *            String text
     * @param encoding
     *            the encoding
     * @return true if success
     * @throws IOException
      */
     public static boolean writeFileString(String fileName, String content,
            String encoding) throws IOException {
        OutputStreamWriter fout = new OutputStreamWriter( new FileOutputStream(
                fileName), encoding);

        fout.write(content);
        fout.close();
         return true ;
    }

     /**
     * Write binary byte array to local file.
     *
     * @param fileName -
     *            local file name will write to
     * @param content
     *            binary byte array
     * @return true if success
     * @throws IOException
      */
     public static boolean writeFileBinary(String fileName, byte [] content)
             throws IOException {
        FileOutputStream fout = new FileOutputStream(fileName);
        fout.write(content);
        fout.close();
         return true ;
    }

     /**
     * ��查文件名是否合法.文�g名字不能包含字符\/:*?"<>|
     *
     * @param fileName文�g�?不包含�\�?br />     * @return boolean is valid file name
      */
     public static boolean isValidFileName(String fileName) {
         boolean isValid = true ;
        String errChar = " \\/:*?\ " <>| " ; //
         if (fileName == null || fileName.length() == 0 ) {
            isValid = false ;
        } else {
             for ( int i = 0 ; i < errChar.length(); i ++ ) {
                 if (fileName.indexOf(errChar.charAt(i)) != - 1 ) {
                    isValid = false ;
                     break ;
                }
            }
        }
         return isValid;
    }

     /**
     * 把非法文件名转换为合法文件名.
     *
     * @param fileName
     * @return
      */
     public static String replaceInvalidFileChars(String fileName) {
        StringBuffer out = new StringBuffer();

         for ( int i = 0 ; i < fileName.length(); i ++ ) {
             char ch = fileName.charAt(i);
             // Replace invlid chars: \\/:*?\"<>|
             switch (ch) {
             case ' \\ ' :
             case ' / ' :
             case ' : ' :
             case ' * ' :
             case ' ? ' :
             case ' \" ' :
             case ' < ' :
             case ' > ' :
             case ' | ' :
                out.append( ' _ ' );
                 break ;
             default :
                out.append(ch);
            }
        }

         return out.toString();
    }

     /**
     * Convert a given file name to a URL(URI) string.
     *
     * @param fileName -
     *            the file to parse
     * @return - URL string
      */
     public static String filePathToURL(String fileName) {
        String fileUrl = new File(fileName).toURI().toString();
         return fileUrl;
    }

     /**
     * Write string content to local file.
     *
     * @param fileName -
     *            local file name will write to
     * @param content
     *            String text
     * @return true if success
     * @throws IOException
      */
     public static boolean appendFileString(String fileName, String content)
             throws IOException {
        OutputStreamWriter fout = new OutputStreamWriter( new FileOutputStream(
                fileName, true ), " GBK " );

        fout.write(content);
        fout.close();
         return true ;
    }
     public static void main(String[] args) {
        System.out.println(replaceInvalidFileChars( " http://www.abc.com/ " ));
    }
}

良帅 2010-05-12 22:03 发表评论

aa亚洲一区一区三区,日韩一区二区三区在线播放,热久久一区二区

StingUtil

FileUtil