Java使用Graphics2D将文字转换无背景文字图片在将图片保存到本地

Graphics2D文字转换无背景文字图片

功能目标

实现将字符串转换成一个无背景的图片

实现效果图：

代码实现：

	/** * 工具类**/public static void main(String[] args) {HashMap<String, String> dto=new HashMap<String, String>();// 将文本转为图片String name = "哈哈哈哈 @少年";// 生成图片名称String fileName = System.currentTimeMillis() + "suyin.jpg";// 这是代表你生成图片后图片保存的路径 /Users/tp/ 是mac的路径地址，win系统的自行更换String path = "/Users/tp/"+fileName;textToPicture(name, path);}/*** 文字转图片* name 需要转换的文字* path 转换完成后保存的地址路径*/public static void textToPicture(String name,String path){boolean rs;String content = name;int length = content.length();//300;// 宽int width = length * 45;// 高int height = 100;//23;int lineLength = 47;//24;int lineLength2 = 47;String content1 = content;String content2 = "";String content3 = "";int cnLineLength = lineLength;for (int i = 0;i < content.length();i++) {char ca = content.charAt(i);if ((ca < '0' || ca > '9') && ca != '-' && ca != ':' && ca != '(' && ca != ')' && ca != '.' && ca != ',' && ca != ' ') {cnLineLength = cnLineLength - 1;}if (i >= cnLineLength){break;}}if (content.length() > cnLineLength) {content1 = content.substring(0, cnLineLength);content2 = content.substring(cnLineLength);String line2 = content2;int cnLineLength2 = lineLength2;for (int i = 0;i < line2.length();i++) {char ca = line2.charAt(i);if ((ca < '0' || ca > '9') && ca != '-' && ca != ':' && ca != '(' && ca != ')' && ca != '.' && ca != ',' && ca != ' ') {cnLineLength2 = cnLineLength2 - 1;}if (i >= cnLineLength2){break;}}if (line2.length() > cnLineLength2) {content2 = line2.substring(0, cnLineLength2);content3 = line2.substring(cnLineLength2);}}BufferedImage bi = null;Graphics2D g2 = null;OutputStream outPutStream = null;try{bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);g2 = (Graphics2D) bi.getGraphics();// 增加下面代码使得背景透明bi = g2.getDeviceConfiguration().createCompatibleImage(width, height, Transparency.TRANSLUCENT);g2.dispose();g2 = (Graphics2D) bi.getGraphics();g2.setColor(new Color(255, 255, 255));g2.setStroke(new BasicStroke(1f));g2.fillRect(128, 128, width, height);Font font = new Font("宋体", Font.BOLD, 40);g2.setFont(font);g2.drawString(content1, 10, 70);g2.drawString(content2, 10, 300);g2.drawString(content3, 10, 400);outPutStream = new FileOutputStream(path);JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(outPutStream);encoder.encode(bi);rs = true;} catch (Exception e) {e.printStackTrace();rs = false;} finally {if (g2 != null){g2.dispose();}if (outPutStream != null) {try {outPutStream.close();} catch (IOException e) {e.printStackTrace();}}}}

ps：一个开发界的小学生，一直在学习从未敢停止