Reading from property file containing utf 8 character

If somebody use @Value annotation, could try StringUils.

@Value("${title}")
private String pageTitle;

public String getPageTitle() {
    return StringUtils.toEncodedString(pageTitle.getBytes(Charset.forName("ISO-8859-1")), Charset.forName("UTF-8"));
}

Use an InputStreamReader with Properties.load(Reader reader):

FileInputStream input = new FileInputStream(new File("uinsoaptest.properties"));
props.load(new InputStreamReader(input, Charset.forName("UTF-8")));

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As a method, this may resemble the following:

  private Properties read( final Path file ) throws IOException {
    final var properties = new Properties();

    try( final var in = new InputStreamReader(
      new FileInputStream( file.toFile() ), StandardCharsets.UTF_8 ) ) {
      properties.load( in );
    }

    return properties;
  }

Don't forget to close your streams. Java 7 introduced StandardCharsets.UTF_8.

Use props.load(new FileReader("uinsoaptest.properties")) instead. By default it uses the encoding Charset.forName(System.getProperty("file.encoding")) which can be set to UTF-8 with System.setProperty("file.encoding", "UTF-8") or with the commandline parameter -Dfile.encoding=UTF-8.