以前公司做项目一般用GBK编码格式，后来考虑国际化想采用UTF-8编码，要重用以前的代码，JAVA代码和JSP有中文字符，用UtralEdit或EditPlus是可以一个个[另存为]来转，那是笨笨的办法。俺从不十这笨事，帮写了个编码工具类，写完两个以指定编码读写文件的方法后，看一看Common FileUtils已有两个类似的方法，当场晕。又重复发明轮子了。
不说了，还要干活，贴上代码以备忘。
package hy;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
public class FileUtils extends org.apache.commons.io.FileUtils
{
private static final String ENCODE_GBK = "GBK";
private static final String ENCODE_UTF8 = "UTF-8";
public static void convertGBK2UTF8(File file){
convertFileEncode(file, ENCODE_GBK, ENCODE_UTF8);
}
public static void convertUTF82GBK(File file){
convertFileEncode(file, ENCODE_UTF8, ENCODE_GBK);
}
public static void convertFileEncode(File file, String fromEncode, String toEncode){
try {
String str = readFileToString(file, fromEncode);
writeStringToFile(file, str, toEncode);
} catch (IOException e) {
System.out.println("Convert failed. File not exsit?");
e.printStackTrace();
}
}
public static String readFile(String filePath, String encode){
String fileContent = "";
try {
FileInputStream fis = new FileInputStream(filePath);
InputStreamReader isr = new InputStreamReader(fis, encode);
BufferedReader br = new BufferedReader(isr);
StringBuffer sb = new StringBuffer();
for(String line = br.readLine(); line != null; line = br.readLine()){
sb.append(line);
}
fileContent = sb.toString();
br.close();
isr.close();
fis.close();
} catch (FileNotFoundException e) {
System.out.println("File not exist："+filePath);
} catch (IOException e) {
e.printStackTrace();
}
return fileContent;
}
public static String saveFile(String fileContent, String encode, String savePath){
try {
FileOutputStream fos = new FileOutputStream(savePath);
OutputStreamWriter osw = new OutputStreamWriter(fos, encode);
BufferedWriter bw = new BufferedWriter(osw);
bw.write(fileContent);
bw.close();
osw.close();
fos.close();
} catch (FileNotFoundException e) {
System.out.println("File not exist："+savePath);
} catch (IOException e) {
e.printStackTrace();
}
return fileContent;
}
public static synchronized void convertDirectory(File dir) throws IOException {
if (!dir.exists() && !dir.isDirectory()) {
throw new IOException("[" + dir + "] not exsit or not a Directory");
}
convert(dir);
}
public static void convert(File dir){
if (dir.canRead() && dir.canWrite()) {
if (dir.isDirectory()) {//Directory
String[] files = dir.list();
if (files != null) {
for (int i = 0; i < files.length; i++) {
convert(new File(dir, files[i]));//递归
}
}
} else {//File
convertGBK2UTF8(dir);
}
}
}
public static void main(String[] args) throws IOException {
// File f = new File("c:/GenericAction.java");
// convertGBK2UTF8(f);
long t1 = System.currentTimeMillis();
File src = new File("C:\\myLucene");
convertDirectory(src);
long t2 = System.currentTimeMillis();
System.out.println("转换完成，用时："+(t2-t1)/1000);
}
}