java - CSV在java中显示日语hankaku(半角)而不是zenkaku(全角)

Question

我正在使用 Java Bufferedwriter 生成 csv 文件。我正在尝试将 zenkaku(全角)数字附加到 csv 文件，但它显示的是 hankaku 而不是 zenkaku。你能建议我如何做到这一点吗？下面是我的示例代码。

public class GenerateCSVProg {

private static StringBuffer sb = null;
private static BufferedWriter bw = null;
private static GenerateCSVProg writer = null;

public GenerateCSVProg(String fileName) throws Exception{
    init(fileName);
}

private void init(String fileName) throws Exception{

    try { 
    bw= new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName)));

    } catch (FileNotFoundException e) {
        throw e;
    }
}

/**
 * @param args
 */
public static void main(String[] args) {
    generateCsvFile("c:\\work\\test.csv"); 
}

private static void generateCsvFile(String fileName){
    try{
        writer = new GenerateCSVProg(fileName);
        System.out.println("Entered in generateCsvFile method");

            writer.append("DisplayName");
            writer.append(",");
            writer.append("Age");
            writer.append("\n");

            writer.append("MKYONG");
            writer.append(",");
            writer.append("26");
            writer.append("\n");

            writer.append("SIVA");
            writer.append(",");
            writer.append("２９"); // zenkaku
            writer.append("\n");
            System.out.println("Entered in generateCsvFile method: " + writer);

            //generate whatever data you want
            bw.write(sb.toString());
            System.out.println("Code break");
            if(writer!=null){
                writer.close();
            }
    }catch (Exception e) {
        System.out.println("Exception occurred");
    }
    finally {

    }   
}

public void append(String out){
    if (sb == null){
        sb = new StringBuffer();    
    }
    sb.append(out);
    System.out.println("SB: " + sb);
}

public static void close() throws Exception{    
    if (bw != null){
        bw.close();
    }
}

}

输出:

DisplayName Age
MKYONG      26
SIVA        29 // Here it is displaying hankaku

请帮我解决这个问题..

Answer 1

对我来说效果很好。您的系统可能不会默认输出为 UTF-8。当您使用 OutputStreamWriter 时，您应该始终指定。将其更改为如下所示:

bw= new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName), "UTF-8"));