Question

我需要将一个格式为.ttf的字体文件写入response.I尝试使用response.getoutputstream()并在调用url时.....它收到了一个相同大小和内容的文件，就我所见。但它不能用作字体文件。我使用的代码就是....我非常感谢你的帮助。

File file = new File(SubsettedSavedPath);
if (file.exists()) {
    response.addHeader("19.file", "exist");
    // out.println("file exist<br><br><br><br><br><br>");
    BufferedReader reader = new BufferedReader(new FileReader(file));
    String line = null;
    StringBuilder stringBuilder = new StringBuilder();
    String ls = System.getProperty("19.line.separator");
    response.addHeader("20.reading File", "Started");
    while ((line = reader.readLine()) != null) {
        stringBuilder.append(line);
        stringBuilder.append(ls);
    }

    String str = stringBuilder.toString();

    response.setContentType("font/ttf");
    OutputStream out = response.getOutputStream();
    out.write(str.getBytes());
    // out.write(str.getBytes());
    // out.flush();
    response.addHeader("21.byte returned", "successful");
    out.close();
}

Answer 1

问题可能在于您正在进行一些破坏二进制数据结构的隐式String转换。不应逐行读取文件文件。

您应该尝试Files.readAllBytes。喜欢：

out.write(Files.readAllBytes(path));

看看这是否适合你。不要写任何其他内容。

有关方法的替代方法，请查看File to byte[] in Java

Answer 2

首先验证JDK中是否可以使用此字体。您可以在JSP中进行打印：

<%@page pageEncoding="UTF-8" language="java" import="java.awt.*"%>
<%@page contentType="text/html;charset=UTF-8"%>
<html>
<head>
<META http-equiv="Content-Type" content="text/html;charset=UTF-8">
</head>
<body>
    <% GraphicsEnvironment e =
    GraphicsEnvironment.getLocalGraphicsEnvironment(); Font[] fonts =
    e.getAllFonts(); // Get the fonts for (Font f : fonts) {
    out.println(f.getFontName()); out.println("
    <br />"); } %>
</body>
</html>

如果没问题，这是一个生成图像的示例，该图像使用我们放在WEB-INF / lib中的TTF字体编写的文本。

        String text = "Custom font test";
        String font_file = "verdana.ttf";
        font_file = request.getRealPath("WEB-INF/lib/" + font_file);
        Font font = Font.createFont(Font.TRUETYPE_FONT, new FileInputStream(
                font_file));
        font = font.deriveFont(25.0f);

        // create temporary 1x1 image to get FontRenderingContext needed to
        // calculate image size
        BufferedImage buffer = new BufferedImage(1, 1,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = buffer.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);
        FontRenderContext fc = g2.getFontRenderContext();
        Rectangle2D bounds = font.getStringBounds(text, fc);

        // calculate the size of the text
        int width = (int) bounds.getWidth();
        int height = (int) bounds.getHeight();

        // prepare final image with proper dimensions
        buffer = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        g2 = buffer.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setFont(font);

        // actually do the drawing
        g2.setColor(Color.white);
        g2.fillRect(0, 0, width, height);
        g2.setColor(Color.blue);
        g2.drawString(text, 0, (int) -bounds.getY());
        // set the content type, get the output stream and print image as PNG
        response.setContentType("image/png");
        OutputStream os = response.getOutputStream();
        ImageIO.write(buffer, "png", os);
        os.close();

对于MIME类型，如果您收到以下消息，可以尝试在响应中使用“font / opentype”：

Resource interpreted as font but transferred with MIME type font/'anything'

通过响应发送字体文件

2 个答案: