java批量生成图片的问题1.linux安装字体?? 以微软雅黑为例，找到msyh.ttf ,copy至下面的文件夹?? usr/share
java批量生成图片的问题
1.linux安装字体
?? 以微软雅黑为例，找到msyh.ttf ,copy至下面的文件夹
?? usr/share/fonts/msyh? 执行命令：fc-cache -fv? 重启jvm即可
2.drawString 部分代码
private static BufferedImage drawString(int type, boolean isWhite,
?? ??? ??? ?int width, int height, String price, Font font_money, Font font,
?? ??? ??? ?Graphics2D g2d, Rectangle2D bounds, Rectangle2D bounds_money) {
?? ??? ? BufferedImage image;
?? ??? ? //透明背景
??? ??? ? image = g2d.getDeviceConfiguration().createCompatibleImage(width, height, Transparency.TRANSLUCENT); ?
?? ??? ? g2d.dispose(); ?
?? ??? ? g2d = image.createGraphics(); ?
?? ??? ? //反锯齿字体
?? ??? ? g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
?? ??? ? if(!isWhite){
?? ??? ??? ? //非白字
?? ??? ??? ? g2d.setColor(new Color(236,0,137)); ?
?? ??? ? }else{
?? ????????? //白字
?? ????????? g2d.setColor(new Color(255,255,255)); ?
?? ??? ? }
?? ??? ? //字体居中
?? ??? ? double y = (height - bounds.getHeight()) / 2;???? ?
???????? double ascent = -bounds.getY();???? ?
???????? double baseY = y + ascent;???? ?
?? ??? ? g2d.setStroke(new BasicStroke(1)); ?
?? ??? ? g2d.setFont(font_money);
?? ??? ? g2d.drawString(FONT_RMB_CHAR, -2, (int)baseY); ?
?? ??? ? g2d.setFont(font);
?? ??? ? g2d.drawString(price, (int)bounds_money.getWidth()-4, (int)baseY);
??? ???? g2d.dispose();
?? ??? ? return image;
?? ?}3.如果需要根据字符串的长度生成图片的宽度，可以使用如下方法?Rectangle2D bounds = font.getStringBounds(price, context);
?width = (int)(bounds.getWidth();
4.批量生成,使用java自带的线程池，并使用CompletionService，目的是在线程处理结束后得到生成成功的ProductId
?? ?? public boolean generateImagesBatch(){
?? ??? ?? boolean flag=true;
?? ??? ?? ExecutorService exec = Executors.newFixedThreadPool(8);
?? ??? ??? CompletionService<CallBack> completionService=
?? ??? ???????????? new ExecutorCompletionService<CallBack>(exec);
?? ??? ?? long startTime=System.currentTimeMillis();
?? ??? ? ??? ?String sql="select productId,price from prod";
?? ??? ??? ?List<Map> skuList = this.cmsJdbcTemplate.queryForList(sql);
?? ??? ??? ?for(Map map:skuList){
?? ??? ??? ??? ?String prodId=((BigDecimal)map.get("productId")).toString();
?? ??? ??? ??? ?double price=((BigDecimal)map.get("price")).doubleValue();
?? ??? ??? ??? ?completionService.submit(new CreateImageConcurrent(prodId,price,FontEnum.ONE,false));??? ??? ??? ????
??? ??? ??? ??? completionService.submit(new CreateImageConcurrent(prodId,price,FontEnum.TWO,false));?? ??? ???? }
?? ??? ??? ?long endTime=System.currentTimeMillis()-startTime;
?? ??? ??? ?log.info("query db time>>>>>>>>>>>>>>"+endTime/1000);
?? ??? ??? ?
?? ??? ??? ?Future<CallBack> future;
?? ??? ??? ?int count=skuList.size()*6;
?? ??? ??? ?log.info("generateImagesBatch count:"+count);
?? ??? ??? ?try {
?? ??? ??? ??? ?while(count>0){
?? ??? ??? ??? ???? future = completionService.take();
?? ??? ??? ??? ??? ?CallBack callBack = future.get();
?? ??? ??? ??? ??? ?if(null!=callBack){
?? ??? ??? ??? ??? ??? ?count--; log.info("generateImagesBatch prod id:"+callBack.getSuccesMessage());?? ??? ??? ??? ???? }
?? ??? ??? ???? }
?? ??? ??? ?endTime=System.currentTimeMillis()-startTime;
?? ??? ??? ?log.info("create images time>>>>>>>>>>>>>>"+endTime/1000);
?? ??? ??? ?log.info("generateImagesBatch success!");
?? ??? ??? ?flag=true;
?? ??? ??? ?} catch (ExecutionException e) {
?? ??? ??? ??? ?flag=false;
?? ??? ??? ??? ?log.error("generateImagesBatch fail::ExecutionException::"+e.getMessage());
?? ??? ??? ?} catch (InterruptedException e) {
?? ??? ??? ??? ?flag=false;
?? ??? ??? ??? ?log.error("generateImagesBatch fail::InterruptedException::"+e.getMessage());
?? ??? ??? ?}finally{
?? ??? ??? ??? ?exec.shutdown();
?? ??? ??? ?}
?? ??? ??? ?return flag;
?? ?? }
