由于第三方给出的csv编码格式问题导致无法导入指定的库表，网上找了许多转换的插件总是不满意。折腾了大半天想想还是自己改造下吧。该工具包解决了几乎所有的编码问题，若是不足之处请指出。由于文件暂存在String类型里面，要是文件太大的话会报内存溢出的错误可以自行调整下代码。
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;
import java.nio.charset.UnsupportedCharsetException;
public class FileCharsetConverter {
public static void main(String[] args) throws Exception {
String dirPath ="C:\\Users\\oftoo\\Desktop\\服务默认\\原编码\\xx\\xx";
File dirFile = new File(dirPath);
File[] files = dirFile.listFiles();
if (null == files) {
System.out.println("路径：" + dirPath + "，该文件夹下没有文件");
} else {
for (int i = 0; i < files.length; i++) {
File file = files[i];
String destFileName = file.getCanonicalPath();
File destFile = new File(destFileName);
if (destFile.exists()) {
convert(destFile.getCanonicalPath(),
"UTF-16LE", "GBK", new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
return name.endsWith("csv");
} else {
System.out.println("路径：" + dirPath + "，该文件夹下没有文件");
System.out.println("编码转换结束");
/*convert("C:\\Users\\xieyh\\Desktop\\测试编码\\LRL_HairStore_Tmall_Acxiom_Transaction_20170619.csv",
"UTF-16LE", "GBK", new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
return name.endsWith("csv");
public static String getParentPath(File file) {
if (null != file && file.exists()) {
return file.getParent();
return "";
* 把指定文件或目录转换成指定的编码
* @param fileName
* 要转换的文件* @param fromCharsetName
* 源文件的编码* @param toCharsetName
* 要转换的编码* @throws Exception
public static void convert(String fileName, String fromCharsetName,
String toCharsetName) throws Exception {
convert(new File(fileName), fromCharsetName, toCharsetName, null);
* 把指定文件或目录转换成指定的编码
* @param file
* 要转换的文件或目录
* @param fromCharsetName
* 源文件的编码* @param toCharsetName
* 要转换的编码* @throws Exception
public static void convert(File file, String fromCharsetName,
String toCharsetName) throws Exception {
convert(file, fromCharsetName, toCharsetName, null);
* 把指定文件或目录转换成指定的编码
* @param file
* 要转换的文件或目录
* @param fromCharsetName
* 源文件的编码* @param toCharsetName
* 要转换的编码* @param filter
* 文件名过滤器* @throws Exception
public static void convert(String fileName, String fromCharsetName,
String toCharsetName, FilenameFilter filter) throws Exception {
convert(new File(fileName), fromCharsetName, toCharsetName, filter);
* 把指定文件或目录转换成指定的编码
* @param file
* 要转换的文件或目录
* @param fromCharsetName
* 源文件的编码* @param toCharsetName
* 要转换的编码* @param filter
* 文件名过滤器* @throws Exception
public static void convert(File file, String fromCharsetName,
String toCharsetName, FilenameFilter filter) throws Exception {
if (file.isDirectory()) {
File[] fileList = null;
if (filter == null) {
fileList = file.listFiles();
} else {
fileList = file.listFiles(filter);
for (File f : fileList) {
convert(f, fromCharsetName, toCharsetName, filter);
} else {
if (filter == null
|| filter.accept(file.getParentFile(), file.getName())) {
String fileContent = getFileContentFromCharset(file,
fromCharsetName);
saveFile2Charset(file, toCharsetName, fileContent);
* 以指定编码方式读取文件，返回文件内容
* @param file
* 要转换的文件* @param fromCharsetName
* 源文件的编码* @return
* @throws Exception
public static String getFileContentFromCharset(File file,
String fromCharsetName) throws Exception {
if (!Charset.isSupported(fromCharsetName)) {
throw new UnsupportedCharsetException(fromCharsetName);
InputStream inputStream = new FileInputStream(file);
InputStreamReader reader = new InputStreamReader(inputStream,
fromCharsetName);
char[] chs = new char[(int) file.length()];
reader.read(chs);
String str = new String(chs).trim();
reader.close();
return str;
* 以指定编码方式写文本文件，存在会覆盖
* @param file
* 要写入的文件* @param toCharsetName
* 要转换的编码* @param content
* @throws Exception
public static void saveFile2Charset(File file, String toCharsetName,
String content) throws Exception {
if (!Charset.isSupported(toCharsetName)) {
throw new UnsupportedCharsetException(toCharsetName);
OutputStream outputStream = new FileOutputStream(file);
OutputStreamWriter outWrite = new OutputStreamWriter(outputStream,
toCharsetName);
outWrite.write(content);
outWrite.close();
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CSDN也是我的博客 作者：咖啡猫没有梦原文：https://blog.csdn.net/oftoo/article/details/74984425
