. java原生画图工具Graphics模拟在题卡上画分数
/**
* 上传修改后的图片
*
* @param ossUrl 图片原来的地址
* @param request
* @param modelMap
* @param editFlag 是否画图标识
* @param imageData base64码
* @param drawjsonArray 分数位置坐标
* @return
* @version v1.0
* @author mayong
*/
public String uploadDecideImage(Long decideDetailID, String ossUrl,
String imageData, Integer editFlag, HttpServletRequest request,
String drawjsonArray) {
//获取存放图片的路径
if (editFlag == null) {
editFlag = 0;
}
String ossFilePath = ossUrl;
try {
if (imageData == null || "".equals(imageData)) {
return "";
}
if (editFlag == 1) {
String serverPath = request.getSession().getServletContext()
.getRealPath("/");
String fileName = UUID.randomUUID().toString();
String imgFilePath = serverPath + "/" + fileName + ".jpg";
//将base64码转换成字节流
ByteArrayInputStream inputStaream = downloadImgae(imageData, "");
//根据坐标画分数
drawScore(drawjsonArray, ossUrl, inputStaream, imgFilePath);
//上传到oss
ossFilePath = OSSUtils.uploadFile(
XuexinConstants.OSS_WORD_BUCKET, imgFilePath, ossUrl);
}
} catch (Exception e) {
log.error("图片上传异常" + ossUrl);
e.printStackTrace();
}
return ossFilePath;
}
/**
*
* 方法描述
*
* @param imageData
* @param serverPath
* @return
* @throws IOException
* @version v1.0
* @author mayong
*/
public ByteArrayInputStream downloadImgae(String imageData,
String serverPath) throws IOException {
Base64 base64 = new Base64();
byte[] k = base64.decode(imageData.substring("data:image/jpg;base64,"
.length()));
ByteArrayInputStream in = new ByteArrayInputStream(k);
return in;
}
/**
* 画分数
* 方法描述
*
* @param imageData
* @param serverPath
* @return
* @throws IOException
* @version v1.0
* @author mayong
* @throws JSONException
*/
public void drawScore(String drawjsonArray, String ossUrl,
ByteArrayInputStream inputStaream, String imgFilePath)
throws IOException, JSONException {
URL url = new URL("http://" + ossUrl);
//题块原图
InputStream imagein = new BufferedInputStream(url.openStream());
BufferedImage image = ImageIO.read(imagein);
//线图
// InputStream imagein2 = new FileInputStream(imgFilePath);
BufferedImage image2 = ImageIO.read(inputStaream);
// Graphics g = image.createGraphics();
//这里直接通过读取图片字节的方式会使，画出来的图颜色失真，所以转换了一下，没有找到原因，所以在此转换了一下
BufferedImage images = new BufferedImage(image.getWidth(),
image.getHeight(), BufferedImage.TYPE_INT_BGR);
//创建画笔
Graphics g = images.createGraphics();
//画题块图片
g.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
//画判分线
g.drawImage(image2, 0, 0, image.getWidth(), image.getHeight(), null);
//画分值
JSONArray jsonArray = new JSONArray(drawjsonArray);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject groupJson = jsonArray.getJSONObject(i);
String step = groupJson.get("step") + "";
//获取分数坐标
Integer y1 = Integer.parseInt(new java.text.DecimalFormat("0")
.format(groupJson.get("y1")));
Integer x2 = Integer.parseInt(new java.text.DecimalFormat("0")
.format(groupJson.get("x2")));
if (x2 > (image.getWidth() - 22) && image.getWidth() < 676) {
x2 = image.getWidth() - 22;
} else if (image.getWidth() > 675 && x2 > 675) {
x2 = 676 - 22;
}
//画分值图片
// String drawImge = "steps03.png";
// if (step.equals("0.5")) {
// drawImge = "step_half.png";
// } else if (step.equals("1")) {
// drawImge = "steps01.png";
// } else if (step.equals("2")) {
// drawImge = "steps02.png";
// } else if (step.equals("3")) {
// drawImge = "steps03.png";
// }
// ImageIcon imageIconQ1 = new ImageIcon(serverPath + "/image/"
// + drawImge);
Integer x2_flag = 0;
Integer y1_flag = 0;
// Integer iconWidth = 0;
// Integer iconHeight = 0;
int fontSize = 20;
//计算分数图片坐标
if (image.getWidth() > 675) {
x2_flag = (x2 - 22) * image.getWidth() / 676;
y1_flag = (y1 - 3) * image.getWidth() / 676;
// iconWidth = imageIconQ1.getIconWidth() * image.getWidth() / 676;
// iconHeight = imageIconQ1.getIconHeight() * image.getWidth()
// / 676;
fontSize = 38;
} else {
x2_flag = x2 - 15;
y1_flag = y1 - 3;
// iconWidth = imageIconQ1.getIconWidth();
// iconHeight = imageIconQ1.getIconHeight();
}
//用画笔画分数图片
// g.drawImage(imageIconQ1.getImage(), x2_flag, y1_flag, iconWidth,
// iconHeight, null);//
//设置分数字段样式
Font font = new Font(null, Font.ITALIC, fontSize); // 38号字
g.setFont(font);
g.setColor(Color.RED);
//用画笔画分数
g.drawString(step, x2_flag, y1_flag);
}
g.dispose();
OutputStream outImage = new FileOutputStream(imgFilePath);
JPEGImageEncoder enc = JPEGCodec.createJPEGEncoder(outImage);
enc.encode(images);
outImage.flush();
imagein.close();
inputStaream.close();
outImage.close();
}
/**
*
* 方法描述
*
* @param srcDir 本地源文件目录，包括文件名
* @param dstDir OSS目标文件目录，包括文件名
* @return
* @throws Exception
* @version v1.0
*/
public static String uploadFile(String bucketName, String srcFile,
String dstFile) {
// 判断源文件是否存在
File f = new File(srcFile);
if (!f.exists()) {
LOG.debug(srcFile + ":文件未找到");
return null;
}
BufferedInputStream is = null;
try {
// 读取文件
is = new BufferedInputStream(new FileInputStream(f));
ObjectMetadata thuObjectMeta = new ObjectMetadata();
thuObjectMeta.setContentLength(f.length());
// 上传到oss
client.putObject(bucketName, dstFile, is, thuObjectMeta);
return bucketName + "@" + dstFile;
} catch (IOException e) {
e.printStackTrace();
LOG.debug(e.getMessage(), e);
} finally {
try {
is.close();
f.delete();// 删除无用的文件
} catch (IOException e) {
LOG.debug(e.getMessage(), e);
}
}
return null;
}