4

我需要将文件的编码从 ANSI(windows-1252) 更改为 UTF8。我写了下面的程序来通过java来做到这一点。该程序将字符转换为 UTF8，但是当我在 notepad++ 中打开文件时，编码类型显示为 ANSI 为 UTF8。当我在访问数据库中导入此文件时，这给了我错误。需要仅具有 UTF8 编码的文件。此外，要求是转换文件而不在任何编辑器中打开它。

public class ConvertFromAnsiToUtf8 {

    private static final char BYTE_ORDER_MARK = '\uFEFF';
    private static final String ANSI_CODE = "windows-1252";
    private static final String UTF_CODE = "UTF8";
    private static final Charset ANSI_CHARSET = Charset.forName(ANSI_CODE);

    public static void main(String[] args) {

        List<File> fileList;
        File inputFolder = new File(args[0]);
        if (!inputFolder.isDirectory()) {
            return;
        }
        File parentDir = new File(inputFolder.getParent() + "\\"
                    + inputFolder.getName() + "_converted");

        if (parentDir.exists()) {
            return;
        }
        if (parentDir.mkdir()) {

        } else {
            return;
        }

        fileList = new ArrayList<File>();
        for (final File fileEntry : inputFolder.listFiles()) {
            fileList.add(fileEntry);
        }

        InputStream in;

        Reader reader = null;
        Writer writer = null;
        try {
            for (File file : fileList) {
                in = new FileInputStream(file.getAbsoluteFile());
                reader = new InputStreamReader(in, ANSI_CHARSET);

                OutputStream out = new FileOutputStream(
                            parentDir.getAbsoluteFile() + "\\"
                                            + file.getName());
                writer = new OutputStreamWriter(out, UTF_CODE);
                writer.write(BYTE_ORDER_MARK);
                char[] buffer = new char[10];
                int read;
                while ((read = reader.read(buffer)) != -1) {
                    System.out.println(read);
                    writer.write(buffer, 0, read);
                }
            }
            reader.close();
            writer.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

任何指针都会有所帮助。

谢谢，阿希什

4

2 回答 2

5

发布的代码正确地从 windows-1252 转码为 UTF-8。

Notepad++ 消息令人困惑，因为“ANSI as UTF-8”没有明显的含义；它似乎是 Notepad++ 中的一个开放缺陷。我相信 Notepad++ 意味着没有 BOM的 UTF-8（参见编码菜单。）

Microsoft Access 是一个 Windows 程序，它可能期望 UTF-8 文件以字节顺序标记 ( BOM ) 开头。

您可以通过在文件开头编写代码点 U+FEFF 来将 BOM 注入文档：

import java.io.*;
import java.nio.charset.*;

public class Ansi1252ToUtf8 {
  private static final char BYTE_ORDER_MARK = '\uFEFF';

  public static void main(String[] args) throws IOException {
    Charset windows1252 = Charset.forName("windows-1252");
    try (InputStream in = new FileInputStream(args[0]);
        Reader reader = new InputStreamReader(in, windows1252);
        OutputStream out = new FileOutputStream(args[1]);
        Writer writer = new OutputStreamWriter(out, StandardCharsets.UTF_8)) {
      writer.write(BYTE_ORDER_MARK);
      char[] buffer = new char[1024];
      int read;
      while ((read = reader.read(buffer)) != -1) {
        writer.write(buffer, 0, read);
      }
    }
  }
}
于 2013-03-12T10:06:45.703 回答
1

在运行 Java 8 的 Windows 7（64 位）上，我不得不关闭每个文件。否则，文件将被截断为 4 kB 的倍数。关闭最后一组文件是不够的，我必须关闭每个文件才能获得所需的结果。发布我的改编版本，添加错误消息： 

import java.io.*;
import java.nio.charset.*;
import java.util.ArrayList;

public class ConvertFromAnsiToUtf8 {

    private static final char BYTE_ORDER_MARK = '\uFEFF';
    private static final String ANSI_CODE = "windows-1252";
    private static final String UTF_CODE = "UTF8";
    private static final Charset ANSI_CHARSET = Charset.forName(ANSI_CODE);
    private static final String PATH_SEP = "\\";
    private static final boolean WRITE_BOM = false;

    public static void main(String[] args) 
    {
        if (args.length != 2) {
            System.out.println("Please name a source and a target directory");
            return;
        }

        File inputFolder = new File(args[0]);
        if (!inputFolder.isDirectory()) {
            System.out.println("Input folder " + inputFolder + " does not exist");
            return;
        }
        File outputFolder = new File(args[1]);

        if (outputFolder.exists()) {
            System.out.println("Folder " + outputFolder + " exists - aborting");
            return;
        }
        if (outputFolder.mkdir()) {
            System.out.println("Placing converted files in " + outputFolder);
        } else {
            System.out.println("Output folder " + outputFolder + " exists - aborting");
            return;
        }

        ArrayList<File> fileList = new ArrayList<File>();
        for (final File fileEntry : inputFolder.listFiles()) {
            fileList.add(fileEntry);
        }

        InputStream in;
        Reader reader = null;
        Writer writer = null;
        int converted = 0;

        try {
            for (File file : fileList) {
                try {
                    in = new FileInputStream(file.getAbsoluteFile());
                    reader = new InputStreamReader(in, ANSI_CHARSET);

                    OutputStream out = new FileOutputStream(outputFolder.getAbsoluteFile() + PATH_SEP + file.getName());
                    writer = new OutputStreamWriter(out, UTF_CODE);

                    if (WRITE_BOM)
                        writer.write(BYTE_ORDER_MARK);
                    char[] buffer = new char[1024];
                    int read;
                    while ((read = reader.read(buffer)) != -1) {
                        writer.write(buffer, 0, read);
                    }
                    ++converted;
                } finally {
                    reader.close();
                    writer.close();
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        System.out.println(converted + " files converted");
    }

}
于 2016-01-08T14:07:42.373 回答