如何用Java编写UTF-8文件？

Question

我有一些当前代码，问题是它创建了一个 1252 代码页文件，我想强制它创建一个 UTF-8 文件

任何人都可以帮我解决这个代码吗，正如我所说，它目前可以工作......但我需要强制保存在 utf 上......我可以传递参数或其他东西吗？？

这就是我所拥有的，非常感谢任何帮助

var out = new java.io.FileWriter( new java.io.File( path )),
        text = new java.lang.String( src || "" );
    out.write( text, 0, text.length() );
    out.flush();
    out.close();

Answer 1

不要使用

FileWriter

，而是创建一个

FileOutputStream

。然后，您可以将其包装在

OutputStreamWriter

中，这允许您在构造函数中传递编码。然后您可以将数据写入 try-with-resources 语句:

try (OutputStreamWriter writer =
             new OutputStreamWriter(new FileOutputStream(PROPERTIES_FILE), StandardCharsets.UTF_8))
    // do stuff
}

Answer 2

试试这个

Writer out = new BufferedWriter(new OutputStreamWriter(
    new FileOutputStream("outfilename"), "UTF-8"));
try {
    out.write(aString);
} finally {
    out.close();
}

Answer 3

尝试使用 Apache Commons 中的

FileUtils.write

。

您应该能够执行以下操作：

File f = new File("output.txt"); 
FileUtils.writeStringToFile(f, document.outerHtml(), "UTF-8");

如果文件不存在，这将创建该文件。

Answer 4

从 Java 7 开始，您可以使用

Files.newBufferedWriter

做同样的事情，更简洁一点：

Path logFile = Paths.get("/tmp/example.txt");
try (BufferedWriter writer = Files.newBufferedWriter(logFile, StandardCharsets.UTF_8)) {
    writer.write("Hello World!");
    // ...
}

Answer 5

这里给出的所有答案都不起作用，因为 java 的 UTF-8 编写有问题。

http://tripoverit.blogspot.com/2007/04/javas-utf-8-and-unicode-writing-is.html

Answer 6

var out = new java.io.PrintWriter(new java.io.File(path), "UTF-8");
text = new java.lang.String( src || "" );
out.print(text);
out.flush();
out.close();

Answer 7

Java NIO

Java 7 文件实用程序类型对于处理文件非常有用：

import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.io.IOException;
import java.util.*;

public class WriteReadUtf8 {
  public static void main(String[] args) throws IOException {
    List<String> lines = Arrays.asList("These", "are", "lines");

    Path textFile = Paths.get("foo.txt");
    Files.write(textFile, lines, StandardCharsets.UTF_8);

    List<String> read = Files.readAllLines(textFile, StandardCharsets.UTF_8);

    System.out.println(lines.equals(read));
  }
}

Java 8 版本 允许您省略

Charset

参数 - 方法默认为 UTF-8。

Files.write(textFile, lines);

Answer 8

我们可以使用java编写UTF-8编码的文件 使用 PrintWriter 写入 UTF-8 编码的 xml

或点击这里

PrintWriter out1 = new PrintWriter(new File("C:\\abc.xml"), "UTF-8");

Answer 9

下面的示例代码可以逐行读取文件并以UTF-8格式写入新文件。另外，我明确指定了 Cp1252 编码。

    public static void main(String args[]) throws IOException {

    BufferedReader br = new BufferedReader(new InputStreamReader(
            new FileInputStream("c:\\filenonUTF.txt"),
            "Cp1252"));
    String line;

    Writer out = new BufferedWriter(
            new OutputStreamWriter(new FileOutputStream(
                    "c:\\fileUTF.txt"), "UTF-8"));

    try {

        while ((line = br.readLine()) != null) {

            out.write(line);
            out.write("\n");

        }

    } finally {

        br.close();
        out.close();

    }
}

Answer 10

以下是在 Eclipse IDE 中将 UTF-8 字符写入文件的示例。

对于 Eclipse。只需从

Run ->  Run Configurations -> Common

将编码设置为 UTF-8

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;

public class UTF_8_Example {

    /**
     * Example of printing UTF-8 characters inside Eclipse IDE and a File.
     * <p>
     * For eclipse, you must go to Run ->  Run Configurations -> Common 
     * and set Encoding to UTF-8.
     * <p>
     * @param args
     */
    public static void main(String[] args) {
        BufferedWriter writer = null;

        try {
            ///////////////////////////////////////////////////////////////////
            // WRITE UTF-8 WITHIN ECLIPSE EDITOR
            ///////////////////////////////////////////////////////////////////         
            char character = '►';
            int code = character;
            char hex = '\u25ba';
            String value = "[" + Integer.toHexString(code) + "][\u25ba][" + character + "][" + (char)code + "][" + hex + "]";
            System.out.println(value);

            ///////////////////////////////////////////////////////////////////
            // WRITE UTF-8 TO A FILE
            ///////////////////////////////////////////////////////////////////
            File file = new File("UTF_8_EXAMPLE.TXT");
            FileOutputStream fileOutputStream = new FileOutputStream(file);
            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream, "UTF-8");
            writer = new BufferedWriter(outputStreamWriter);
            writer.write(value);
        }
        catch(Throwable e) {
            throw new RuntimeException(e);
        }
        finally {
            try {
                if(writer != null) { writer.close(); }
            }
            catch(Throwable e) {
                throw new RuntimeException(e);              
            }
        }
    }   
}