水印工具类
import javax.imageio.ImageIO;import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Font;import java.awt.Graphics2D;import java.awt.RenderingHints;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;/*** 定义文字加水印*/public class ImageWatermarkUtils {// 水印字体private static final Font FONT = new Font("微软雅黑", Font.PLAIN, 14);// 透明度private static final AlphaComposite COMPOSITE = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.6f);// 水印之间的间隔private static final int X_MOVE = 150;// 水印之间的间隔private static final int Y_MOVE = 200;/*** 打水印(文字)** @param srcImgPath 源文件地址* @param font 字体* @param markContentColor 水印颜色* @param waterMarkContent 水印内容* @param outImgPath 输出文件的地址*/public static void markWithContent(String srcImgPath, Font font, Color markContentColor,String waterMarkContent,String outImgPath) {FileOutputStream fos = null;try {// 读取原图片信息File srcFile = new File(srcImgPath);File outFile = new File(outImgPath);BufferedImage srcImg = ImageIO.read(srcFile);// 图片宽、高int imgWidth = srcImg.getWidth();int imgHeight = srcImg.getHeight();// 图片缓存BufferedImage bufImg = new BufferedImage(imgWidth, imgHeight, BufferedImage.TYPE_INT_RGB);// 创建绘图工具Graphics2D graphics = bufImg.createGraphics();// 画入原始图像graphics.drawImage(srcImg, 0, 0, imgWidth, imgHeight, null);// 设置水印颜色graphics.setColor(markContentColor);// 设置水印透明度graphics.setComposite(COMPOSITE);// 设置倾斜角度graphics.rotate(Math.toRadians(-35), (double) bufImg.getWidth() / 2,(double) bufImg.getHeight() / 2);// 设置水印字体graphics.setFont(font);// 消除java.awt.Font字体的锯齿graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);int xCoordinate = -imgWidth / 2, yCoordinate;// 字体长度int markWidth = FONT.getSize() * getTextLength(waterMarkContent);// 字体高度int markHeight = FONT.getSize();// 循环添加水印while (xCoordinate < imgWidth * 1.5) {yCoordinate = -imgHeight / 2;while (yCoordinate < imgHeight * 1.5) {graphics.drawString(waterMarkContent, xCoordinate, yCoordinate);yCoordinate += markHeight + Y_MOVE;}xCoordinate += markWidth + X_MOVE;}// 释放画图工具graphics.dispose();// 输出图片fos = new FileOutputStream(outFile);ImageIO.write(bufImg, "jpg", fos);} catch (Exception e) {e.printStackTrace();} finally {if (fos != null) {try {fos.flush();fos.close();} catch (Exception e) {e.printStackTrace();}}}}//计算水印文本长度//1、中文长度即文本长度 2、英文长度为文本长度二分之一public static int getTextLength(String text) {//水印文字长度int length = text.length();for (int i = 0; i < text.length(); i++) {String s = String.valueOf(text.charAt(i));if (s.getBytes().length > 1) {length++;}}length = length % 2 == 0 ? length / 2 : length / 2 + 1;return length;}public static void main(String[] args) {ImageWatermarkUtils.markWithContent("J:\\apache-tomcat-7.0.52\\webapps\\uploadimage\\aftersale\\11071412117038f330-a850-469d-92f3-937f174bfa49.jpg", FONT, Color.darkGray, "ls65535","J:\\apache-tomcat-7.0.52\\webapps\\uploadimage\\aftersale\\11071412117038f330-a850-469d-92f3-937f174bfa49.jpg");}}
controller层
import com.mon.QsMap;import com.mon.util.ImageWatermarkUtils;import io.swagger.annotations.Api;import io.swagger.annotations.ApiOperation;import org.springframework.web.bind.annotation.CrossOrigin;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.awt.Color;import java.awt.Font;import java.io.File;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.UUID;@CrossOrigin@RestController@RequestMapping("/UploadFileImage")@Api(value = "图片", tags = "微信小程序~图片加水印")public class CustomUploadFileController {private static final Font FONT = new Font("微软雅黑", Font.PLAIN, 14);/*** WeChat 微信小程序 图片上传* @param request* @param response* @return* @throws IOException*/@ApiOperation(value = "图片上传",notes = "UploadPic")@RequestMapping(value = "/images", method = {RequestMethod.POST, RequestMethod.GET})public QsMap uploadPicture(HttpServletRequest request, HttpServletResponse response) throws IOException {QsMap qsMap = new QsMap();//获取上传文件的主文件名与扩展名MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;//对应前端的upload的name参数"file"MultipartFile multipartFile = req.getFile("file");//获取上传时的名称String fileName = multipartFile.getOriginalFilename();//存放图片的绝对路径String realPath = "J:\\apache-tomcat-7.0.52\\webapps\\uploadimage\\aftersale";//格式化时间戳SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");//System.currentTimeMillis() 是直接调用本地方法，而 new Date().getTime() 确还要创建一个Date对象，降低了效率和占用了内存(虽然损耗很小)。String nowTime = sdf.format(System.currentTimeMillis());//取得图片的格式后缀String originalLastName = multipartFile.getOriginalFilename();String picLastName = originalLastName.substring(originalLastName.lastIndexOf("."));//判断上传格式if(picLastName.equals(".jpg") || picLastName.equals(".gif") || picLastName.equals(".png") || picLastName.equals(".jpeg")){try {File dir = new File(realPath);//如果文件目录不存在，创建文件目录if (!dir.exists()) {dir.mkdirs();}//拼接 名字+时间戳+后缀String picName = nowTime + UUID.randomUUID() + picLastName;File file = new File(realPath,picName);multipartFile.transferTo(file);//全路径qsMap.put("file","J:\\apache-tomcat-7.0.52\\webapps\\uploadimage\\aftersale\\" + picName);//获取上传的图片路径 加水印(尺寸~大小~样式/工具类自行调节)ImageWatermarkUtils.markWithContent((String) qsMap.get("file"), FONT, Color.darkGray, "ls65535",(String) qsMap.get("file"));} catch (IOException e) {e.printStackTrace();} catch (IllegalStateException e) {e.printStackTrace();}}else{qsMap.put("上传了不合法的图片后缀!",picLastName);}return qsMap;}}
postman测试
效果图如下
