1.网络文件下载
@GetMapping("downgd")@ResponseBodypublic Result downloadNet(HttpServletResponse response,String path) throws MalformedURLException {// 下载网络文件 Result result = new Result(); URL url = new URL(path); try { UUID uuid = UUID.randomUUID(); URLConnection conn = url.openConnection(); InputStream in = conn.getInputStream(); OutputStream out = response.getOutputStream(); response.setHeader("content-disposition"," attachment; filename=" +URLEncoder.encode(uuid+".jpg", "UTF-8")); byte [] by = new byte[1024]; int i = 0; while((i=in.read(by))!=-1) { out.write(by,0,i);//通过浏览器下载 } //下载到具体门路 //FileOutputStream fs = // new FileOutputStream("e:/"+uuid+".jpg");//byte[] buffer = new byte[1204];//int length;//while ((byteread = inStream.read(buffer)) != -1) {// bytesum += byteread;// fs.write(buffer, 0, byteread);//} in.close(); }catch (Exception e){ e.printStackTrace(); result.setCode(Result.Code.SYSTEMERROR); } return result;}
2.图片合成增加文字
1、BatchNumberUtils工具类
package com.cy.file_onload.qrCode;import java.text.SimpleDateFormat;import java.util.Date;import java.util.UUID;import java.util.concurrent.atomic.AtomicInteger;public class BatchNumberUtils { private static final SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMddHHmmss"); private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd"); private static final AtomicInteger atomicInteger = new AtomicInteger(1000000);// 创立不间断的订单号 //@param no 数据中心编号// @return 惟一的、不间断订单号public static synchronized String getOrderNoByUUID(String no) { Integer uuidHashCode = UUID.randomUUID().toString().hashCode(); if (uuidHashCode < 0) { uuidHashCode = uuidHashCode * (-1); } String date = simpleDateFormat.format(new Date()); return no + date + uuidHashCode; } // 获取同一秒钟 生成的订单号间断 //@param no 数据中心编号 // @return 同一秒内订单间断的编号public static synchronized String getOrderNoByAtomic(String no) { atomicInteger.getAndIncrement(); int i = atomicInteger.get(); String date = simpleDateFormat.format(new Date()); return no + date + i; } // 获取以后日期组成的文件名 //@param name 文件名前缀 // @return 组成的文件名public static synchronized String getFileNameByDate(String name) { String date = dateFormat.format(new Date()); return name +"/"+ date; } }
2、图片合成全代码
@Controller@RequestMapping("/test/")public class ResumeTemplateServiceImpl {private static String ComposeFileNameManual = "compose_images"; //申请 url 中的资源映射，不举荐写死在代码中， // 最好提供可配置，如 upload_flowChart private String resourceHandler="/upload_flowChart/"; //上传文件保留的本地目录，应用@Value获取全局配置 //文件中配置的属性值，如 E:/java/upload_flowChart private String uploadImagesLocation = "E://"; // 合成图片 * @param templatePath 模板地址 // @param seedPath 二维码地址 // @return种子模板链接 @RequestMapping("imgAdd")public String composePic(String templatePath, String seedPath) { templatePath = "背景图片门路"; seedPath = "指标图片门路";try {//文件名 String picName = UUID.randomUUID().toString() + ".jpg";//日期格局文件夹 String composeFileName = BatchNumberUtils.getFileNameByDate(ComposeFileNameManual);//合成图片文件夹 File pathFile = new File(uploadImagesLocation + File.separator + composeFileName);//合成文件门路 String path = uploadImagesLocation + File.separator + composeFileName + File.separator + picName;//数据库贮存地址 String dataPath = resourceHandler.substring(0, resourceHandler.length() - 2) + composeFileName + "/" + picName; if (seedPath == null) { File file = new File(seedPath); if (!file.isFile()) { System.out.println("图片源门路不是一个文件"); } System.out.println("图片源门路不存在"); } if (templatePath == null) { File file = new File(templatePath); if (!file.isFile()) { System.out.println("背景图片门路不是一个文件"); } System.out.println("背景图片门路不存在"); } if (!pathFile.exists()) { pathFile.mkdirs(); }//---------------------------------合成图片步骤----------------------------- //背景 File templateFlie = new File(templatePath); BufferedImage bg = ImageIO.read(templateFlie);//读取背景图片 int height = bg.getHeight();//背景图片的高 int width = bg.getWidth(); //背景图片的宽 BufferedImage qcCode = ImageIO.read(new File(seedPath)); //读取二维码图片 300 * 300 BufferedImage img = new BufferedImage(184, 312, BufferedImage.TYPE_INT_RGB);//创立画布 Graphics g = img.getGraphics();//生成画笔 开启画图 // 绘制背景图片 g.drawImage(bg.getScaledInstance(184, 312, Image.SCALE_DEFAULT), 0, 0, null); // 绘制放大后的图 //绘制二维码图片 定位到背景图的右下角 /* g.drawImage(qcCode.getScaledInstance(width / 4, width / 4, Image.SCALE_DEFAULT), width - (width / 4)-10, height - (width / 4)- 10, null); // 绘制放大后的图*/ //绘制二维码图片，居中 g.drawImage(qcCode.getScaledInstance(180, 180, Image.SCALE_DEFAULT), 1, height/23, null); // 绘制放大后的图 Font font = new Font("微软雅黑", Font.PLAIN, 15);// 增加字体的属性设置 g.setFont(font); g.setColor(Color.BLACK);// 截取用户名称的最初一个字符 String lastChar = "张三".substring("张三".length() - 1);// 拼接新的用户名称 String newUserName = "张三".substring(0, 1) + "**" + lastChar + " 的二维码";// 增加用户名称 g.drawString(newUserName, 2, 270);//关掉画笔 g.dispose();ImageIO.write(img, "jpg", new File(path));System.out.println("合成图片胜利，门路：" + path);File file = new File(path);System.out.println(file);//返回合成图片的门路 return dataPath; } catch (Exception e) {return e.getMessage();//throw new CustomException("图片合成失败", 400); } }}