java图片文字水印_Java实现图片添加水印文字（左右下角）
importjavax.imageio.ImageIO;import java.awt.*;importjava.awt.image.BufferedImage;importjava.io.File;importjava.io.FileOutputStream;/*** @ProjectName: test
* @Package: com.test.utils
* @ClassName: MyTest
* @Author: luqiming
* @Description:
* @Date: 2020/10/29 11:48
* @Version: 1.0*/
public classAddWatermarkUtil {public static voidwaterPress(String srcImgPath, String outImgPath,
Color markContentColor,intfontSize, String waterMarkContent) {try{
String[] waterMarkContents= waterMarkContent.split("\\|\\|");//读取原图片信息
File srcImgFile = newFile(srcImgPath);
Image srcImg=ImageIO.read(srcImgFile);int srcImgWidth = srcImg.getWidth(null);int srcImgHeight = srcImg.getHeight(null);//加水印
BufferedImage bufImg = newBufferedImage(srcImgWidth, srcImgHeight, BufferedImage.TYPE_INT_RGB);//得到画笔对象
Graphics2D g =bufImg.createGraphics();//设置起点
g.drawImage(srcImg, 0, 0, srcImgWidth, srcImgHeight, null);
Font font= new Font("宋体", Font.PLAIN, fontSize);//根据图片的背景设置水印颜色
g.setColor(markContentColor);//设置水印文字字体
g.setFont(font);//数组长度
int contentLength =waterMarkContents.length;//获取水印文字中最长的
int maxLength = 0;for (int i = 0; i < contentLength; i++) {int fontlen =getWatermarkLength(waterMarkContents[i], g);if (maxLength
maxLength=fontlen;
}
}for (int j = 0; j < contentLength; j++) {
waterMarkContent=waterMarkContents[j];int tempX = 10;int tempY =fontSize;//单字符长度
int tempCharLen = 0;//单行字符总长度临时计算
int tempLineLen = 0;
StringBuffer sb= newStringBuffer();for (int i = 0; i < waterMarkContent.length(); i++) {char tempChar =waterMarkContent.charAt(i);
tempCharLen=getCharLen(tempChar, g);
tempLineLen+=tempCharLen;if (tempLineLen >=srcImgWidth) {//长度已经满一行,进行文字叠加
g.drawString(sb.toString(), tempX, tempY);//清空内容,重新追加
sb.delete(0, sb.length());
tempLineLen= 0;
}//追加字符
sb.append(tempChar);
}//通过设置后两个输入参数给水印定位
g.drawString(sb.toString(), 20, srcImgHeight - (contentLength - j - 1) * tempY-50);
}
g.dispose();//输出图片
FileOutputStream outImgStream = newFileOutputStream(outImgPath);
ImageIO.write(bufImg,"jpg", outImgStream);
outImgStream.flush();
outImgStream.close();
}catch(Exception e) {
e.printStackTrace();
}
}public static int getCharLen(charc, Graphics2D g) {returng.getFontMetrics(g.getFont()).charWidth(c);
}/*** 获取水印文字总长度
*
* @paramwaterMarkContent水印的文字
* @paramg
* @return水印文字总长度*/
public static intgetWatermarkLength(String waterMarkContent, Graphics2D g) {returng.getFontMetrics(g.getFont()).charsWidth(
waterMarkContent.toCharArray(),0, waterMarkContent.length());
}public static voidmain(String[] args) {//原图位置, 输出图片位置, 水印文字颜色, 水印文字
String font = "张天爱||就很完美||2020-05-27 17:00:00";
String inputAddress= "F:/UpupooWallpaper/1.jpg";
String outputAddress= "F:/UpupooWallpaper/1.jpg";
Color color=Color.GREEN;
waterPress(inputAddress, outputAddress, color,50, font);
}
}