遍历多个文件，将文件中的注释去掉

Posted 2020-12-18 rearboal

package com.shine.eiuop.utils;

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.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
* title: 清除注释
*
* @author Administrator
* @时间 2009-7-30:下午09:28:10
*/
public class FileTransUtils {

/** 根目录 */
public static String rootDir = "C:\\Users\\14423\\Desktop\\亚强\\msp中文翻译\\msp2\\msp\\src";
//"D:\\testdir
// D:\\workspace\\proj_map\\src\\com
public static void main(String args[]) throws FileNotFoundException,
UnsupportedEncodingException {

deepDir(rootDir);

}

public static void deepDir(String rootDir) throws FileNotFoundException,
UnsupportedEncodingException {
File folder = new File(rootDir);
if (folder.isDirectory()) {
String[] files = folder.list();
for (int i = 0; i < files.length; i++) {
File file = new File(folder, files[i]);
if (file.isDirectory() && file.isHidden() == false) {
System.out.println(file.getPath());
deepDir(file.getPath());
} else if (file.isFile()) {
clearComment(file.getPath());
}
}
} else if (folder.isFile()) {
clearComment(folder.getPath());
}
}

/**
* @param currentDir
* 当前目录
* @param currentFileName
* 当前文件名
* @throws FileNotFoundException
* @throws UnsupportedEncodingException
*/
/**
* @param filePathAndName
* @throws FileNotFoundException
* @throws UnsupportedEncodingException
*/
public static void clearComment(String filePathAndName)
throws FileNotFoundException, UnsupportedEncodingException {
StringBuffer buffer = new StringBuffer();
String line = null; // 用来保存每行读取的内容
InputStream is = new FileInputStream(filePathAndName);
BufferedReader reader = new BufferedReader(new InputStreamReader(is,
"GBK"));
try {
line = reader.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} // 读取第一行
while (line != null) { // 如果 line 为空说明读完了
buffer.append(line); // 将读到的内容添加到 buffer 中
buffer.append("\r\n"); // 添加换行符
try {
line = reader.readLine();
} catch (IOException e) {
e.printStackTrace();
} // 读取下一行
}
// 1、清除单行的注释，如： //某某，正则为 ：\/\/.*
// 2、清除单行的注释，如：/** 某某 */，正则为：\/\*\*.*\*\/
// 3、清除单行的注释，如：/* 某某 */，正则为：\/\*.*\*\/
// 4、清除多行的注释，如:
// /* 某某1
// 某某2
// */
// 正则为：.*/\*(.*)\*/.*
// 5、清除多行的注释，如：
// /** 某某1
// 某某2
// */
// 正则为：/\*\*(\s*\*\s*.*\s*?)*
String filecontent = buffer.toString();

Map<String, String> patterns = new HashMap<String, String>();
patterns.put("([^:])\\/\\/.*", "$1");// 匹配在非冒号后面的注释，此时就不到再遇到http://
patterns.put("\\s+\\/\\/.*", "");// 匹配“//”前是空白符的注释
patterns.put("^\\/\\/.*", "");
patterns.put("^\\/\\*\\*.*\\*\\/$", "");
patterns.put("\\/\\*.*\\*\\/", "");
patterns.put("/\\*(\\s*\\*\\s*.*\\s*?)*\\*\\/", "");
//patterns.put("/\\*(\\s*\\*?\\s*.*\\s*?)*", "");
Iterator<String> keys = patterns.keySet().iterator();
String key = null, value = "";
while (keys.hasNext()) {
// 经过多次替换
key = keys.next();
value = patterns.get(key);
filecontent = replaceAll(filecontent, key, value);
}
System.out.println(filecontent);
// 再输出到原文件
try {
File f = new File(filePathAndName);
if (!f.getParentFile().exists()) {
f.getParentFile().mkdirs();
}
FileOutputStream out = new FileOutputStream(filePathAndName);
byte[] bytes = filecontent.getBytes("GBK");
out.write(bytes);
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* @param fileContent
* 内容
* @param patternString
* 匹配的正则表达式
* @param replace
* 替换的内容
* @return
*/
public static String replaceAll(String fileContent, String patternString,
String replace) {
String str = "";
Matcher m = null;
Pattern p = null;
try {
p = Pattern.compile(patternString);
m = p.matcher(fileContent);
str = m.replaceAll(replace);
} catch (Exception e) {
e.printStackTrace();
} finally {
m = null;
p = null;
}
// 获得匹配器对象
return str;

}

}