如何用Java寫一個UTF-8的文件？

Question

我有一些當前代碼，問題是它創建了一個 1252 代碼頁文件，我想強制它創建一個 UTF-8 文件

任何人都可以幫我處理這段代碼，正如我所說，它目前可以工作......但我需要強制保存在 utf 上......我可以傳遞參數或其他東西嗎？

這就是我所擁有的，非常感謝任何幫助

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

創建一個FileOutputStream而不是使用FileWriter 。 然后，您可以將其包裝在一個OutputStreamWriter ，這允許您在構造函數中傳遞編碼。 然后，您可以將數據寫入try-with-resources 語句中：

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

Answer 2

試試這個

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

Answer 3

嘗試使用 Apache Commons 中的FileUtils.write 。

您應該能夠執行以下操作：

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

如果文件不存在，這將創建該文件。

Answer 4

從 Java 7 開始，你可以更簡潔地對Files.newBufferedWriter做同樣的Files.newBufferedWriter ：

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

Answer 5

由於 java 的 UTF-8 編寫被竊聽，這里給出的所有答案都不起作用。

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 7 Files 實用程序類型對於處理文件很有用：

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 版本允許您省略Charset參數 - 方法默認為 UTF-8。

Answer 8

我們可以使用 java 編寫 UTF-8 編碼的文件，使用 PrintWriter 編寫 UTF-8 編碼的 xml

或點擊這里

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

Answer 9

下面的示例代碼可以逐行讀取文件並以 UTF-8 格式寫入新文件。 另外，我明確指定了 Cp1252 編碼。

    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

下面是將 UTF-8 個字符寫入 Eclipse IDE 和一個文件的例子。

對於 Eclipse。只需從Run -> Run Configurations -> Common通用對話框中將編碼設置為 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);              
            }
        }
    }   
}