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\\202211071412117038f330-a850-469d-92f3-937f174bfa49.jpg", FONT, Color.darkGray, "ls65535",
"J:\\apache-tomcat-7.0.52\\webapps\\uploadimage\\aftersale\\202211071412117038f330-a850-469d-92f3-937f174bfa49.jpg");
}
}
controller层
import com.lt.crm.common.QsMap;
import com.lt.crm.common.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
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