package com.springbootdubbo;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
/**
*@title : JavaClass
*@author:zyh
*@createDate:2018/11/19 18:30
*
**/
public class UTF8BOMConverter extends Reader {
PushbackInputStream internalIn;
InputStreamReader internalIn2 = null;
String defaultEnc;
private static final int BOM_SIZE = 4;
/**
* @param in inputstream to be read
* @param defaultEnc default encoding if stream does not have
* BOM marker. Give NULL to use system-level default.
*/
UTF8BOMConverter(InputStream in, String defaultEnc) {
internalIn = new PushbackInputStream(in, BOM_SIZE);
this.defaultEnc = defaultEnc;
}
public String getDefaultEncoding() {
return defaultEnc;
}
/**
* Get stream encoding or NULL if stream is uninitialized.
* Call init() or read() method to initialize it.
*/
public String getEncoding() {
if (internalIn2 == null) return null;
return internalIn2.getEncoding();
}
/**
* Read-ahead four bytes and check for BOM marks. Extra bytes are
* unread back to the stream, only BOM bytes are skipped.
*/
protected void init() throws IOException {
if (internalIn2 != null) return;
String encoding;
byte bom[] = new byte[BOM_SIZE];
int n, unread;
n = internalIn.read(bom, 0, bom.length);
if ((bom[0] == (byte) 0x00) && (bom[1] == (byte) 0x00) &&
(bom[2] == (byte) 0xFE) && (bom[3] == (byte) 0xFF)) {
encoding = "UTF-32BE";
unread = n - 4;
} else if ((bom[0] == (byte) 0xFF) && (bom[1] == (byte) 0xFE) &&
(bom[2] == (byte) 0x00) && (bom[3] == (byte) 0x00)) {
encoding = "UTF-32LE";
unread = n - 4;
} else if ((bom[0] == (byte) 0xEF) && (bom[1] == (byte) 0xBB) &&
(bom[2] == (byte) 0xBF)) {
encoding = "UTF-8";
unread = n - 3;
} else if ((bom[0] == (byte) 0xFE) && (bom[1] == (byte) 0xFF)) {
encoding = "UTF-16BE";
unread = n - 2;
} else if ((bom[0] == (byte) 0xFF) && (bom[1] == (byte) 0xFE)) {
encoding = "UTF-16LE";
unread = n - 2;
} else {
// Unicode BOM mark not found, unread all bytes
encoding = defaultEnc;
unread = n;
}
//System.out.println("read=" + n + ", unread=" + unread);
if (unread > 0) internalIn.unread(bom, (n - unread), unread);
// Use given encoding
if (encoding == null) {
internalIn2 = new InputStreamReader(internalIn);
} else {
internalIn2 = new InputStreamReader(internalIn, encoding);
}
}
public void close() throws IOException {
init();
internalIn2.close();
}
public int read(char[] cbuf, int off, int len) throws IOException {
init();
return internalIn2.read(cbuf, off, len);
}
private static void readContentAndSaveWithEncoding(String filePath, String readEncoding, String saveEncoding) throws Exception {
saveContent(filePath, readContent(filePath, readEncoding), saveEncoding);
}
private static void saveContent(String filePath, String content, String encoding) throws Exception {
FileOutputStream fos = new FileOutputStream(filePath);
OutputStreamWriter w = new OutputStreamWriter(fos, encoding);
w.write(content);
w.flush();
}
private static String readContent(String filePath, String encoding) throws Exception {
FileInputStream file = new FileInputStream(new File(filePath));
BufferedReader br = new BufferedReader(new UTF8BOMConverter(file, encoding));
String line = null;
String fileContent = "";
while ((line = br.readLine()) != null) {
fileContent = fileContent + line;
fileContent += "\r\n";
}
return fileContent;
}
private static List<String> getPerlineFileName(String filePath) throws Exception {
FileInputStream file = new FileInputStream(new File(filePath));
BufferedReader br = new BufferedReader(new InputStreamReader(file, "UTF-8"));
String line = null;
List<String> list = new ArrayList<String>();
while ((line = br.readLine()) != null) {
list.add(line);
}
return list;
}
private static List<String> getAllFilePaths(File filePath, List<String> filePaths) {
File[] files = filePath.listFiles();
if (files == null) {
return filePaths;
}
for (File f : files) {
if (f.isDirectory()) {
filePaths.add(f.getPath());
getAllFilePaths(f, filePaths);
} else {
filePaths.add(f.getPath());
}
}
return filePaths;
}
public static void main(String[] args) throws Exception {
String suffix = ".java";
List<String> paths = new ArrayList<String>();
paths = getAllFilePaths(new File("E:\\mgtt\\DING"), paths);
List<String> pathList = new ArrayList<String>();
for (String path : paths) {
if (path.endsWith(suffix)) {
pathList.add(path);
}
}
for (String path : pathList) {
readContentAndSaveWithEncoding(path, "UTF-8", "UTF-8");
System.out.println(path + "转换成功");
}
}
}
