效果：

代码：

    /*** @return void* @Author xia* @Description //TODO 写字换行算法* @Date 18:08 2021/4/1* @Param []**/private static void drawWordAndLineFeed(Graphics2D g2d, Font font, String words, int wordsX, int wordsY, int wordsWidth) {FontDesignMetrics metrics = FontDesignMetrics.getMetrics(font);// 获取字符的最高的高度int height = metrics.getHeight();int width = 0;int count = 0;int total = words.length();String subWords = words;int b = 0;for (int i = 0; i < total; i++) {// 统计字符串宽度 并与 预设好的宽度 作比较if (width <= wordsWidth) {width += metrics.charWidth(words.charAt(i)); // 获取每个字符的宽度count++;} else {// 画 除了最后一行的前几行String substring = subWords.substring(0, count);g2d.drawString(substring, wordsX, wordsY + (b * height));subWords = subWords.substring(count);b++;width = 0;count = 0;}// 画 最后一行字符串if (i == total - 1) {g2d.drawString(subWords, wordsX, wordsY + (b * height));}}}

调用：

      // 添加第二行文字Font fontTwo = new Font("MIMO天线及其空口测试技术", Font.BOLD, 140  );graphics.setFont(fontTwo);graphics.setColor(Color.WHITE);String textTwo = "MIMO天线及其空口测试技术";int twoX = 50; // 第二行文字起始x坐标int twoY = 480; // 第二行文字起始y坐标drawWordAndLineFeed(graphics, fontTwo, textTwo, twoX, twoY, 1200);