java springboot实现图片添加文字/图片水印（单个/多个）
一.Controller
@PostMapping(value = {"/watermark"},
produces = {MediaType.APPLICATION_JSON_UTF8_VALUE})
public String watermark(@RequestParam("file") MultipartFile image) throws Exception {
// MarkService markService = new TextMarkServiceImpl(); //单个文字水印
// MarkService markService = new MoreTextServiceImpl(); //多个文字水印
// MarkService markService = new ImgMarkServiceImpl(); //单个图片水印
MarkService markService = new MoreImgMarkServiceImpl(); //多个图片水印
//将上传的图片上传到项目中类路径下面
String path = "";
String realUploadPath = InvestInvitationInfoController.class.getClassLoader().getResource(path).getPath();
String imageURL =uploadImage( image, path, realUploadPath );
File imgFile=new File(realUploadPath + image.getOriginalFilename());
//添加水印
String watermark = markService.watermark(imgFile, image.getOriginalFilename(), path, realUploadPath);
return watermark;
}
//将上传的图片上传到项目中类路径下面
public String uploadImage(MultipartFile file, String uploadPath, String physicalUploadPath ) {
String filePath = physicalUploadPath + file.getOriginalFilename();
try {
File targetFile=new File(filePath);
FileUtils.writeByteArrayToFile(targetFile, file.getBytes());
} catch (IOException e) {
e.printStackTrace();
}
return uploadPath + "/" + file.getOriginalFilename();
}
二.Service
import java.awt.*;
import java.io.File;
public interface MarkService {
public static final String MARK_TEXT="LMS"; //字体水印
public static final String FONT_NAME="微软雅黑";
public static final int FONT_STYLE= Font.BOLD;
public static final int FONT_SIZE=20;
public static final Color FONT_COLOR=Color.BLACK;
public static final int X=10;
public static final int Y=10;
public static final float ALPHA=0.3f; //透明度
public static final String LOGO="mimi.jpg"; //图片水印，提前保存在类路径下的图片
public String watermark(File img, String imgName, String imgpath, String realImgPath);
}
三.ServiceImpl
（一）单个文字水印
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class MarkServiceImpl implements MarkService {
public static final String MARK_TEXT = "LMS";
public static final String FONT_NAME = "微软雅黑";
public static final int FONT_STYLE = Font.BOLD;
public static final int FONT_SIZE = 120;
public static final Color FONT_COLOR = Color.BLACK;
public static final int X = 10;
public static final int Y = 10;
public static final float ALPHA = 0.3f;
public static final String LOGO = "logo.png";
@Override
public String watermark(File img, String imgFileName, String imgpath, String realImgPath) {
//创建图像编码工具
FileOutputStream os = null;
String logoFileName = "logo_" + imgFileName;
try {
//获取原图大小
Image image = ImageIO.read(img);
int width = image.getWidth(null);
int height = image.getHeight(null);
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = bufferedImage.createGraphics();
graphics.drawImage(image, 0, 0, width, height, null);
//设置文件水印
graphics.setFont(new Font(FONT_NAME, FONT_STYLE, FONT_SIZE));
graphics.setColor(FONT_COLOR);
//获取文本水印的真正高度与宽度
int wid = FONT_SIZE * getLength(MARK_TEXT);
int hei = FONT_SIZE;
int widDiff = width - wid;
int heiDiff = height - hei;
int x = X;
int y = Y;
if (x > widDiff) x = widDiff;
if (y > heiDiff) x = widDiff;
//设置透明度
graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, ALPHA));
graphics.drawString(MARK_TEXT, x, y + FONT_SIZE);
graphics.dispose();
os = new FileOutputStream(realImgPath + "/" + logoFileName);
JPEGImageEncoder en = JPEGCodec.createJPEGEncoder(os);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return imgpath + "/" + logoFileName;
}
//计算文本长度
public int getLength(String text) {
int length = text.length();
for (int i = 0; i < 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;
}
}
（二）单个图片水印
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class ImgMarkServiceImpl implements MarkService {
@Override
public String watermark(File img, String imgFileName, String imgpath, String realImgPath) {
//创建图像编码工具
FileOutputStream os = null;
String logoFileName = "logo_" + imgFileName;
String logoPath=realImgPath+"/"+LOGO;
try {
//获取原图大小
Image image = ImageIO.read(img);
int width = image.getWidth(null);
int height = image.getHeight(null);
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = bufferedImage.createGraphics();
graphics.drawImage(image, 0, 0, width, height, null);
File logo = new File(logoPath);
Image imageLogo = ImageIO.read(logo);
int logoWidth = imageLogo.getWidth(null);
int logoHeight = imageLogo.getHeight(null);
int widDiff = width - logoWidth;
int heiDiff = height - logoHeight;
int x = X;
int y = Y;
if (x > widDiff) x = widDiff;
if (y > heiDiff) x = widDiff;
//设置透明度
graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, ALPHA));
graphics.drawImage(imageLogo,x,y,null);
graphics.dispose();
os = new FileOutputStream(realImgPath + "/" + logoFileName);
ImageIO.write(bufferedImage, "jpg", os);
os.flush();
os.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return imgpath + "/" + logoFileName;
}
}
（三）多个文字水印
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class MoreTextServiceImpl implements MarkService {
@Override
public String watermark(File img, String imgFileName, String imgpath, String realImgPath) {
//创建图像编码工具
FileOutputStream os = null;
String logoFileName = "logo_" + imgFileName;
try {
//获取原图大小
Image image = ImageIO.read(img);
int width = image.getWidth(null);
int height = image.getHeight(null);
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = bufferedImage.createGraphics();
graphics.drawImage(image, 0, 0, width, height, null);
//设置文字水印
graphics.setFont(new Font(FONT_NAME, FONT_STYLE, FONT_SIZE));
graphics.setColor(FONT_COLOR);
//获取文本水印的真正高度与宽度
int wid = FONT_SIZE * getLength(MARK_TEXT);
int hei = FONT_SIZE;
//设置透明度
graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, ALPHA));
//旋转图片
graphics.rotate(Math.toRadians(30), bufferedImage.getWidth() / 2, bufferedImage.getHeight() / 2);
int x = -width / 2;
int y = -height / 2;
while (x < width * 1.5) {
y = -height / 2;
while (y < height * 1.5) {
graphics.drawString(MARK_TEXT, x, y);
y += hei + y;
}
x += wid + x;
}
graphics.dispose();
os = new FileOutputStream(realImgPath + "/" + logoFileName);
// JPEGImageEncoder en = JPEGCodec.createJPEGEncoder(os);
ImageIO.write(bufferedImage, "jpg", os);
os.flush();
os.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return imgpath + "/" + logoFileName;
}
//计算文本长度
public int getLength(String text) {
int length = text.length();
for (int i = 0; i < 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;
}
}
（四）多个图片水印
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class MoreImgMarkServiceImpl implements MarkService {
@Override
public String watermark(File img, String imgFileName, String imgpath, String realImgPath) {
//创建图像编码工具
FileOutputStream os = null;
String logoFileName = "logo_" + imgFileName;
String logoPath=realImgPath+"/"+LOGO;
try {
//获取原图大小
Image image = ImageIO.read(img);
int width = image.getWidth(null);
int height = image.getHeight(null);
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = bufferedImage.createGraphics();
graphics.drawImage(image, 0, 0, width, height, null);
//获取图片水印
File logo = new File(logoPath);
Image imageLogo = ImageIO.read(logo);
int logoWidth = imageLogo.getWidth(null);
int logoHeight = imageLogo.getHeight(null);
//设置透明度
graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, ALPHA));
//旋转图片
graphics.rotate(Math.toRadians(30), bufferedImage.getWidth() / 2, bufferedImage.getHeight() / 2);
int x = -width / 2;
int y = -height / 2;
//循环添加水印
while (x < width * 1.5) {
y = -height / 2;
while (y < height * 1.5) {
graphics.drawImage(imageLogo,x,y,null);
y += logoHeight + y;
}
x += logoWidth + x;
}
graphics.dispose();
os = new FileOutputStream(realImgPath + "/" + logoFileName);
// JPEGImageEncoder en = JPEGCodec.createJPEGEncoder(os);
ImageIO.write(bufferedImage, "jpg", os);
os.flush();
os.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return imgpath + "/" + logoFileName;
}
}