Graphics2D 写图片中文乱码问题及解决

public Font(String name,int style,int size);

   GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
        String[] fa=ge.getAvailableFontFamilyNames();
        for (String s:fa) {
            System.out.println(s);
        }

        BufferedImage buffImg = Imageio.read(new File("/tmp/1.jpg"));
        Graphics2D g = buffImg.createGraphics();
        g.setColor(Color.BLACK);
        Font f = new Font("宋体",Font.PLAIN, 30);
        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);
        g.setFont(f);
        FontMetrics fm = g.getFontMetrics(f);
        g.drawString("中31国", 100, 100);
        ImageIO.write(buffImg, FORMAT, new File("/tmp/test.jpg"));

String s = "\u5ba2\u6237\u7b7e\u5b57\uff1a";
String str = s.replaceAll("\\\\", "");