JAVA实现图片加水印及Base64图片字符串加水印

我不是女神ヾ 2022-06-05 10:13 815阅读 0赞

### ![Center][] ###

### JAVA实现图片加水印及Base64图片字符串加水印 ###

可将根据不同需求选择场景一,场景二来实现家水印操作,个人感觉比我上一遍文章<[base64字符串加水印][base64]>实在

**场景一:**

**涉及上送过来的不直接是图片,而是Base64字符串,则先需转换读取,然后再打上水印,最后再合成一张返回Base64**

package transtion;  
  
import java.awt.AlphaComposite;  
import java.awt.Color;  
import java.awt.Font;  
import java.awt.Graphics2D;  
import java.awt.Image;  
import java.awt.RenderingHints;  
import java.awt.image.BufferedImage;  
import java.io.ByteArrayOutputStream;  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.OutputStream;  
  
  
import javax.imageio.ImageIO;  
import javax.swing.ImageIcon;  
  
  
import sun.misc.BASE64Decoder;  
import sun.misc.BASE64Encoder;  
  
  
import com.sun.image.codec.jpeg.JPEGCodec;  
import com.sun.image.codec.jpeg.JPEGImageEncoder;  
  
  
  
/\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*  
\* Description: 图片水印工具类  
\* Copyright: Copyright (c) 2011  
\* Company: Founder  
\* Project: CMS  
\*  
\* @Author taoxg  
\* @version 1.0  
\* @See  
\* HISTORY 2011-9-27 taoxg create  
\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*/  
public class waterBase64 \{  
  
// 水印透明度  
private static float alpha = 0.9f;  
// 水印横向位置  
private static int positionWidth = 150;  
// 水印纵向位置  
private static int positionHeight = 100;  
// 水印文字字体  
private static Font font = new Font("宋体", Font.BOLD, 30);  
// 水印文字颜色  
private static Color color = Color.red;  
/\*\*  
\*  
\* @param alpha  
\* 水印透明度  
\* @param positionWidth  
\* 水印横向位置  
\* @param positionHeight  
\* 水印纵向位置  
\* @param font  
\* 水印文字字体  
\* @param color  
\* 水印文字颜色  
\*/  
public static void setImageMarkOptions(float alpha , int positionWidth , int positionHeight ,Font font,Color color)\{  
if(alpha!=0.0f)waterBase64.alpha = alpha;  
if(positionWidth!=0)waterBase64.positionWidth = positionWidth;  
if(positionHeight!=0)waterBase64.positionHeight = positionHeight;  
if(font!=null)waterBase64.font = font;  
if(color!=null)waterBase64.color = color;  
\}  
  
public static void main(String \[\] args)\{  
String srcImgPath = "666.png";  
String iconPath = "water\_logo.png";  
String targerIconPath2 = "hecheng.jpg";  
String logoText = "我爱北京天安门";  
  
//可通过此方法调试间距,颜色.不适用则默认初始化数据  
setImageMarkOptions(0.9f,250,100,null,null);  
  
/\*\*给图片添加水印图片,水印图片旋转-45\*/  
markImageByIcon(iconPath, srcImgPath, targerIconPath2, 0);  
  
\}  
  
//读取图片转为Base64字符串  
public static String TuImage(String args) \{  
  
String imgFile = args;//待处理的图片  
InputStream in = null;  
byte\[\] data = null;  
//读取图片字节数组  
try\{  
in = new FileInputStream(imgFile);  
data = new byte\[in.available()\];  
in.read(data);  
in.close();  
\}catch (IOException e)\{  
e.printStackTrace();  
\}  
//对字节数组Base64编码  
BASE64Encoder encoder = new BASE64Encoder();  
return encoder.encode(data);  
\}  
  
/\*\*  
\* 给图片添加水印图片、可设置水印图片旋转角度  
\*  
\* @param iconPath  
\* 水印图片路径  
\* @param srcImgPath  
\* 源图片路径  
\* @param targerPath  
\* 目标图片路径  
\* @param degree  
\* 水印图片旋转角度  
\*/  
public static String markImageByIcon(String iconPath, String srcImgPath,String targerPath, Integer degree) \{  
  
BASE64Encoder base64en = new BASE64Encoder();  
BASE64Decoder base64de = new BASE64Decoder();  
InputStream is = null;  
OutputStream os = null;  
byte \[\] b;  
try \{  
//针对上送的图片是Base64场景  
b= base64de.decodeBuffer(TuImage(srcImgPath));  
is=new java .io.ByteArrayInputStream(b);  
BufferedImage srcImg = ImageIO.read(is);  
  
  
BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),srcImg.getHeight(null), BufferedImage.TYPE\_INT\_RGB);  
  
// 1、得到画笔对象  
Graphics2D g = buffImg.createGraphics();  
  
// 2、设置对线段的锯齿状边缘处理  
g.setRenderingHint(RenderingHints.KEY\_INTERPOLATION,RenderingHints.VALUE\_INTERPOLATION\_BILINEAR);  
g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE\_SMOOTH), 0, 0, null);  
// 3、设置水印旋转  
if (null != degree) \{  
g.rotate(Math.toRadians(degree),(double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);  
\}  
  
// 4、水印图片的路径 水印图片一般为gif或者png的，这样可设置透明度(本地地址可直接填写,服务器地址ImageIcon导包位置一定要正确)  
ImageIcon imgIcon = new ImageIcon(iconPath);  
  
// 5、得到Image对象。  
Image img = imgIcon.getImage();  
  
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC\_ATOP,alpha));  
  
// 6、水印图片的位置  
g.drawImage(img, positionWidth, positionHeight, null);  
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC\_OVER));  
// 7、释放资源  
g.dispose();  
  
// 8、生成图片  
// os = new FileOutputStream(targerPath);  
// ImageIO.write(buffImg, "JPG", os);  
  
//把图片转换为字节  
ByteArrayOutputStream bot = new ByteArrayOutputStream();  
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bot);  
encoder.encode(buffImg);  
byte \[\] rstByte = bot.toByteArray();  
srcImgPath = base64en.encode(rstByte);  
System.out.println("图片完成添加水印图片");  
return srcImgPath;  
  
\} catch (Exception e) \{  
e.printStackTrace();  
\} finally \{  
try \{  
if (null != os)  
os.close();  
if(null != is)  
is.close();  
\} catch (Exception e) \{  
e.printStackTrace();  
\}  
\}  
return targerPath;  
\}  
\}

**场景二:**

**直接将图片加水印图片,加水印文字**

package transtion;  
  
import java.awt.AlphaComposite;  
import java.awt.Color;  
import java.awt.Font;  
import java.awt.Graphics2D;  
import java.awt.Image;  
import java.awt.RenderingHints;  
import java.awt.image.BufferedImage;  
import java.io.File;  
import java.io.FileOutputStream;  
import java.io.InputStream;  
import java.io.OutputStream;  
  
import javax.imageio.ImageIO;  
import javax.swing.ImageIcon;  
  
/\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*  
\* Description: 图片水印工具类  
\* Copyright: Copyright (c) 2011  
\* Company: Founder  
\* Project: CMS  
\*  
\* @Author taoxg  
\* @version 1.0  
\* @See  
\* HISTORY 2011-9-27 taoxg create  
\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*/  
public class ImageMarkLogoUtil \{  
  
// 水印透明度  
private static float alpha = 0.9f;  
// 水印横向位置  
private static int positionWidth = 150;  
// 水印纵向位置  
private static int positionHeight = 100;  
// 水印文字字体  
private static Font font = new Font("宋体", Font.BOLD, 30);  
// 水印文字颜色  
private static Color color = Color.red;  
/\*\*  
\*  
\* @param alpha  
\* 水印透明度  
\* @param positionWidth  
\* 水印横向位置  
\* @param positionHeight  
\* 水印纵向位置  
\* @param font  
\* 水印文字字体  
\* @param color  
\* 水印文字颜色  
\*/  
public static void setImageMarkOptions(float alpha , int positionWidth , int positionHeight ,Font font,Color color)\{  
if(alpha!=0.0f)ImageMarkLogoUtil.alpha = alpha;  
if(positionWidth!=0)ImageMarkLogoUtil.positionWidth = positionWidth;  
if(positionHeight!=0)ImageMarkLogoUtil.positionHeight = positionHeight;  
if(font!=null)ImageMarkLogoUtil.font = font;  
if(color!=null)ImageMarkLogoUtil.color = color;  
\}  
  
/\*\*  
\* 给图片添加水印图片  
\*  
\* @param iconPath  
\* 水印图片路径  
\* @param srcImgPath  
\* 源图片路径  
\* @param targerPath  
\* 目标图片路径  
\*/  
public static void markImageByIcon(String iconPath, String srcImgPath,  
String targerPath) \{  
markImageByIcon(iconPath, srcImgPath, targerPath, null);  
\}  
  
/\*\*  
\* 给图片添加水印图片、可设置水印图片旋转角度  
\*  
\* @param iconPath  
\* 水印图片路径  
\* @param srcImgPath  
\* 源图片路径  
\* @param targerPath  
\* 目标图片路径  
\* @param degree  
\* 水印图片旋转角度  
\*/  
public static void markImageByIcon(String iconPath, String srcImgPath,  
String targerPath, Integer degree) \{  
OutputStream os = null;  
try \{  
  
Image srcImg = ImageIO.read(new File(srcImgPath));  
  
BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),  
srcImg.getHeight(null), BufferedImage.TYPE\_INT\_RGB);  
  
// 1、得到画笔对象  
Graphics2D g = buffImg.createGraphics();  
  
// 2、设置对线段的锯齿状边缘处理  
g.setRenderingHint(RenderingHints.KEY\_INTERPOLATION,RenderingHints.VALUE\_INTERPOLATION\_BILINEAR);  
g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE\_SMOOTH), 0, 0, null);  
// 3、设置水印旋转  
if (null != degree) \{  
g.rotate(Math.toRadians(degree),(double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);  
\}  
  
// 4、水印图片的路径 水印图片一般为gif或者png的，这样可设置透明度(本地地址可直接填写,服务器地址ImageIcon导包位置一定要正确)  
ImageIcon imgIcon = new ImageIcon(iconPath);  
  
// 5、得到Image对象。  
Image img = imgIcon.getImage();  
  
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC\_ATOP,alpha));  
  
// 6、水印图片的位置  
g.drawImage(img, positionWidth, positionHeight, null);  
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC\_OVER));  
// 7、释放资源  
g.dispose();  
  
// 8、生成图片  
os = new FileOutputStream(targerPath);  
ImageIO.write(buffImg, "JPG", os);  
  
System.out.println("图片完成添加水印图片");  
  
\} catch (Exception e) \{  
e.printStackTrace();  
\} finally \{  
try \{  
if (null != os)  
os.close();  
\} catch (Exception e) \{  
e.printStackTrace();  
\}  
\}  
\}  
  
/\*\*  
\* 给图片添加水印文字  
\*  
\* @param logoText  
\* 水印文字  
\* @param srcImgPath  
\* 源图片路径  
\* @param targerPath  
\* 目标图片路径  
\*/  
public static void markImageByText(String logoText, String srcImgPath,  
String targerPath) \{  
markImageByText(logoText, srcImgPath, targerPath, null);  
\}  
  
/\*\*  
\* 给图片添加水印文字、可设置水印文字的旋转角度  
\*  
\* @param logoText  
\* @param srcImgPath  
\* @param targerPath  
\* @param degree  
\*/  
public static void markImageByText(String logoText, String srcImgPath,  
String targerPath, Integer degree) \{  
  
InputStream is = null;  
OutputStream os = null;  
try \{  
// 1、源图片  
Image srcImg = ImageIO.read(new File(srcImgPath));  
BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),srcImg.getHeight(null), BufferedImage.TYPE\_INT\_RGB);  
  
// 2、得到画笔对象  
Graphics2D g = buffImg.createGraphics();  
// 3、设置对线段的锯齿状边缘处理  
g.setRenderingHint(RenderingHints.KEY\_INTERPOLATION,RenderingHints.VALUE\_INTERPOLATION\_BILINEAR);  
g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE\_SMOOTH), 0, 0, null);  
// 4、设置水印旋转  
if (null != degree) \{  
g.rotate(Math.toRadians(degree),(double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);  
\}  
// 5、设置水印文字颜色  
g.setColor(color);  
// 6、设置水印文字Font  
g.setFont(font);  
// 7、设置水印文字透明度  
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC\_ATOP,alpha));  
// 8、第一参数->设置的内容，后面两个参数->文字在图片上的坐标位置(x,y)  
g.drawString(logoText, positionWidth, positionHeight);  
// 9、释放资源  
g.dispose();  
// 10、生成图片  
os = new FileOutputStream(targerPath);  
ImageIO.write(buffImg, "JPG", os);  
  
System.out.println("图片完成添加水印文字");  
  
\} catch (Exception e) \{  
e.printStackTrace();  
\} finally \{  
try \{  
if (null != is)  
is.close();  
\} catch (Exception e) \{  
e.printStackTrace();  
\}  
try \{  
if (null != os)  
os.close();  
\} catch (Exception e) \{  
e.printStackTrace();  
\}  
\}  
\}  
  
public static void main(String \[\] args)\{  
String srcImgPath = "666.png";  
String iconPath = "water\_logo.png";  
String targerIconPath2 = "hecheng.jpg";  
String logoText = "我爱北京天安门";  
  
//可通过此方法调试间距,颜色.不适用则默认初始化数据  
setImageMarkOptions(0.9f,250,100,null,null);  
  
/\*\*给图片添加水印图片,水印图片旋转-45\*/  
// markImageByIcon(iconPath, srcImgPath, targerIconPath2, 0);  
/\*\*给图片添加水印图片,水印图片旋转-45 平行\*/  
// markImageByIcon(iconPath, srcImgPath, targerIconPath2,45);  
/\*\*给图片添加水印文字,水印图片旋转 平行\*/  
// markImageByText(logoText, srcImgPath, targerIconPath2);  
/\*\*给图片添加水印文字,水印图片旋转-45\*/  
markImageByText(logoText, srcImgPath, targerIconPath2, -45);  
\}  
\}

[Center]: /images/20220605/b06624408c9047fa869df3f21c7043fa.png
[base64]: http://blog.csdn.net/weixin_40986207/article/details/78587322