工具目的：

移除软著摘出代码文件中的空白行。
只针对文本文件，doc文件不支持。

使用方法：

javac RemoveBlankLinesUtil.java
java RemoveBlankLinesUtil YOUR_CODE_FILE
例:java RemoveBlankLinesUtil code.txt

执行完成提示如下，目标文件在当前目录下生成。
Success, check out file:**/YOUR_CODE_FILE_BlankLineRemovedFile
例：
Success, check out file:/home//下载/temp/code.txt_BlankLineRemovedFile

代码：

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;public class RemoveBlankLinesUtil {public static void main(String[] args) {removeBlankLines(args);}private static void removeBlankLines(String[] args) {println("Parsing start");if (args == null || args.length == 0) {printHelpMsg();return;}String fileName = args[0];File file = new File(fileName);if (!file.exists()) {println("file:" + fileName + " not exit!");return;}String path = System.getProperty("user.dir");println("currentPath:" + path);String outFilePath = path + File.separator + fileName + "_BlankLineRemovedFile";println("outFilePath:" + outFilePath);try {File outFile = new File(outFilePath);if (outFile.exists()) {outFile.delete();}outFile.createNewFile();FileOutputStream fileOutputStream = new FileOutputStream(outFile, true);BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"));String line = null;while ((line = bufferedReader.readLine()) != null) {if (!line.equals("")) {println("writing msg:" + line);fileOutputStream.write((line + "\r\n").getBytes());} else {println("skip blank line");}}fileOutputStream.flush();fileOutputStream.close();bufferedReader.close();println("Success, check out file:" + outFilePath);} catch (FileNotFoundException ex) {ex.printStackTrace();println("ERROR");} catch (IOException e) {e.printStackTrace();println("ERROR");}}private static void println(String msg) {System.out.println(msg + "");}private static void printHelpMsg() {String msg = "ERROR, You can uses 'java RemoveBlankLinesUtil FILE_PATH to remove blank lines in target file'";println(msg);}}