将数据内容转化为图片

public class WqcTestController {

public static void createImage(String fileLocation, BufferedImage image) {

try {

FileOutputStream fos = new FileOutputStream(fileLocation);

BufferedOutputStream bos = new BufferedOutputStream(fos);

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);

encoder.encode(image);

bos.close();

fos.close();

} catch (Exception e) {

e.printStackTrace();

}

}

public static void graphicsGeneration(String path, List list) {

int imageWidth = 500;// 图片的宽度

int imageHeight = 500;// 图片的高度

BufferedImage image = new BufferedImage(imageWidth, imageHeight,BufferedImage.TYPE_INT_RGB);

Graphics graphics = image.getGraphics();

graphics.setColor(Color.white);

graphics.fillRect(0, 0, imageWidth, imageHeight);

graphics.setColor(Color.BLACK);

int high = 30;

int wigth = 0;

graphics.setFont(new Font("宋体", Font.BOLD, 30));

graphics.drawString("药方详情", 200, high);

graphics.setFont(new Font("宋体", Font.BOLD, 20));

high += 10;

graphics.drawLine(0, high, 550, high);

for(Map rowMap : list){

high += 50;

wigth = 40;

for(Map.Entry entry : rowMap.entrySet()){

String name = entry.getKey() + "：" + entry.getValue();

if("title".equals(entry.getKey())){

high += 30;

graphics.setFont(new Font("黑体", Font.BOLD, 20));

graphics.drawString(entry.getValue(), wigth, high);

graphics.setFont(new Font("宋体", Font.BOLD, 20));

} else {

graphics.drawString(name, wigth, high);

wigth += 160;

}

}

}

createImage(path,image);

}

/** 图片名生成 **/

public static String genImageName() {

//取当前时间的长整形值包含毫秒

long millis = System.currentTimeMillis();

//加上三位随机数

Random random = new Random();

int end3 = random.nextInt(999);

//如果不足三位前面补0

String str = millis + String.format("%03d", end3);

return str;

}

public static void main(String[] args) {

List list = new ArrayList();

for (int i = 0; i < 8; i++) {

Map mapTitle = new HashMap();

mapTitle.put("单价/克", "20.0");

mapTitle.put("克数", "1");

mapTitle.put("名称", "柴胡");

list.add(mapTitle);

}

String path = "E:/upload/image";

File newFileDir = new File(path);

//如果不存在 则创建

if (!newFileDir.exists()) {

newFileDir.mkdirs();

}

graphicsGeneration(path+"/"+genImageName()+".jpg",list);

System.out.println("完成");

}

}