java使用Graphics2D绘图/画图方式

BufferedImage bi = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = bi.createGraphics();
// 开启抗锯齿
RenderingHints renderingHints = new RenderingHints(RenderingHints.KEY_ANTIALIASING,
        RenderingHints.VALUE_ANTIALIAS_ON);
// 使用高质量压缩
renderingHints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
graphics.setRenderingHints(renderingHints);

BufferedImage bgmImage = ImageIO.read(new ByteArrayInputStream(FileUtils.readFileToByteArray(new File("filePath"))));
graphics.drawImage(bgmImage, x, y, width, height, null);

graphics.setFont(new Font("PingFangSC-Regular", Font.PLAIN, 24));
graphics.setColor(Color.WHITE);
graphics.drawString(title, x, y);

// 背景色矩形
graphics.setColor(new Color(254, 68, 82));
graphics.fillRoundRect(x, y, width, height, 4, 4);

   private static int drawStringAutoLineFeed(Graphics g, String strContent, int rowWidth, int x, int y) {
        String[] split = strContent.split("\n");
        int total = 0;
        for (String str : split) {
            int height = drawStringAutoLine(g, str, rowWidth, x, y);
            total += height;
            y += height;
        }
        return total;
    }
 
    /**
     * 根据指定宽度自动换行
     * 
     * @param g
     * @param rowWidth
     * @param strContent
     * @param x
     * @param y
     */
    private static int drawStringAutoLine(Graphics g, String strContent, int rowWidth, int x, int y) {
        // 获取字符串 字符的总宽度
        int strWidth = getStringLength(g, strContent);
        // 获取字符高度
        int strHeight = getStringHeight(g);
        // 字符串总个数
        int rows = 0;
        if (strWidth > rowWidth) {
            int rowStrNum = getRowStrNum(strContent.length(), rowWidth, strWidth);
            rows = getRows(strWidth, rowWidth);
            String temp = "";
            for (int i = 0; i < rows; i++) {
                // 获取各行的String
                if (i == rows - 1) {
                    // 最后一行
                    temp = strContent.substring(i * rowStrNum, strContent.length());
                } else {
                    temp = strContent.substring(i * rowStrNum, i * rowStrNum + rowStrNum);
                }
                if (i > 0) {
                    // 第一行不需要增加字符高度，以后的每一行在换行的时候都需要增加字符高度
                    y = y + strHeight;
                }
                g.drawString(temp, x, y);
            }
        } else {
            // 直接绘制
            g.drawString(strContent, x, y);
        }
        return strHeight * rows;
    }
 
    private static int getDrawStringAutoLineHeight(Graphics g, String strContent, int rowWidth) {
        String[] split = strContent.split("\n");
        int height = 0;
        for (String str : split) {
            // 获取字符串 字符的总宽度
            int strWidth = getStringLength(g, str);
            // 获取字符高度
            height += getStringHeight(g) * getRows(strWidth, rowWidth);
        }
        return height;
    }
 
    private static int getStringLength(Graphics g, String str) {
        char[] strChar = str.toCharArray();
        return g.getFontMetrics().charsWidth(strChar, 0, str.length());
    }
 
    // 每一行字符的个数
    private static int getRowStrNum(int strNum, int rowWidth, int strWidth) {
        int rowsNum = 0;
        rowsNum = (rowWidth * strNum) / strWidth;
        return rowsNum;
    }
 
    // 字符行数
    private static int getRows(int strWidth, int rowWidth) {
        int rows = 0;
        if (strWidth % rowWidth > 0) {
            rows = strWidth / rowWidth + 1;
        } else {
            rows = strWidth / rowWidth;
        }
        return rows;
    }
 
    // 字符高度
    private static int getStringHeight(Graphics g) {
        return g.getFontMetrics().getHeight();
    }

graphics.setFont(new Font("PingFangSC-Regular", Font.PLAIN, 12));
graphics.setColor(Color.GRAY);
drawStringAutoLineFeed(graphics, strContent, rowWidth, x, y);

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ImageIO.write(bi, "jpg", outputStream);
return outputStream.toByteArray();

ImageIO.write(bi, "jpg", new File("outFilePath"));