How to write a UTF-8 file with Java?

问题:

I have some current code and the problem is its creating a 1252 codepage file, i want to force it to create a UTF-8 file

Can anyone help me with this code, as i say it currently works... but i need to force the save on utf.. can i pass a parameter or something??

this is what i have, any help really appreciated

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();

回答1:

Instead of using FileWriter, create a FileOutputStream. You can then wrap this in an OutputStreamWriter, which allows you to pass an encoding in the constructor. Then you can write your data to that inside a try-with-resources Statement:

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

回答2:

Try this

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

回答3:

Try using FileUtils.write from Apache Commons.

You should be able to do something like:

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

This will create the file if it does not exist.

回答4:

All of the answers given here wont work since java\'s UTF-8 writing is bugged.

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

回答5:

Since Java 7 you can do the same with Files.newBufferedWriter a little more succinctly:

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

回答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();

回答7:

The Java 7 Files utility type is useful for working with files:

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));
  }
}

The Java 8 version allows you to omit the Charset argument - the methods default to UTF-8.

回答8:

we can write the UTF-8 encoded file with java using use PrintWriter to write UTF-8 encoded xml

Or Click here

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

回答9:

Below sample code can read file line by line and write new file in UTF-8 format. Also, i am explicitly specifying Cp1252 encoding.

    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();

    }
}