Java实现给图片添加水印

周末在家上围脖，看到sina围脖上图片都有水印，想到Java有专门Image的处理包，同样应该可以实现水印功能，查了资料小试下来发现java实现水印还是非常方便的，水印可以是图片或者文字，而且还可以选择不同的角度旋转呢，以后有需要可以写个代码批量处理自己的图片了。

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本门目录：

• 图片水印
• 文字水印

  [一]、图片水印

  ?

  Java代码??
  1. package?michael.io.image;??
  2. ??
  3. import?java.awt.AlphaComposite;??
  4. import?java.awt.Graphics2D;??
  5. import?java.awt.Image;??
  6. import?java.awt.RenderingHints;??
  7. import?java.awt.image.BufferedImage;??
  8. import?java.io.File;??
  9. import?java.io.FileInputStream;??
  10. import?java.io.FileOutputStream;??
  11. import?java.io.InputStream;??
  12. import?java.io.OutputStream;??
  13. ??
  14. import?javax.imageio.ImageIO;??
  15. import?javax.swing.ImageIcon;??
  16. ??
  17. import?com.sun.image.codec.jpeg.JPEGCodec;??
  18. import?com.sun.image.codec.jpeg.JPEGImageDecoder;??
  19. import?com.sun.image.codec.jpeg.JPEGImageEncoder;??
  20. ??
  21. /**?
  22. ?*?图片水印?
  23. ?*?@blog?http://sjsky.iteye.com?
  24. ?*?@author?Michael?
  25. ?*/??
  26. public?class?ImageMarkLogoByIcon?{??
  27. ??
  28. ????/**?
  29. ?????*?@param?args?
  30. ?????*/??
  31. ????public?static?void?main(String[]?args)?{??
  32. ????????String?srcImgPath?=?"d:/test/michael/myblog_01.png";??
  33. ????????String?iconPath?=?"d:/test/michael/blog_logo.png";??
  34. ????????String?targerPath?=?"d:/test/michael/img_mark_icon.jpg";??
  35. ????????String?targerPath2?=?"d:/test/michael/img_mark_icon_rotate.jpg";??
  36. ????????//?给图片添加水印??
  37. ????????ImageMarkLogoByIcon.markImageByIcon(iconPath,?srcImgPath,?targerPath);??
  38. ????????//?给图片添加水印,水印旋转-45??
  39. ????????ImageMarkLogoByIcon.markImageByIcon(iconPath,?srcImgPath,?targerPath2,??
  40. ????????????????-45);??
  41. ??
  42. ????}??
  43. ??
  44. ????/**?
  45. ?????*?给图片添加水印?
  46. ?????*?@param?iconPath?水印图片路径?
  47. ?????*?@param?srcImgPath?源图片路径?
  48. ?????*?@param?targerPath?目标图片路径?
  49. ?????*/??
  50. ????public?static?void?markImageByIcon(String?iconPath,?String?srcImgPath,??
  51. ????????????String?targerPath)?{??
  52. ????????markImageByIcon(iconPath,?srcImgPath,?targerPath,?null);??
  53. ????}??
  54. ??
  55. ????/**?
  56. ?????*?给图片添加水印、可设置水印图片旋转角度?
  57. ?????*?@param?iconPath?水印图片路径?
  58. ?????*?@param?srcImgPath?源图片路径?
  59. ?????*?@param?targerPath?目标图片路径?
  60. ?????*?@param?degree?水印图片旋转角度?
  61. ?????*/??
  62. ????public?static?void?markImageByIcon(String?iconPath,?String?srcImgPath,??
  63. ????????????String?targerPath,?Integer?degree)?{??
  64. ????????OutputStream?os?=?null;??
  65. ????????try?{??
  66. ????????????Image?srcImg?=?ImageIO.read(new?File(srcImgPath));??
  67. ??
  68. ????????????BufferedImage?buffImg?=?new?BufferedImage(srcImg.getWidth(null),??
  69. ????????????????????srcImg.getHeight(null),?BufferedImage.TYPE_INT_RGB);??
  70. ??
  71. ????????????//?得到画笔对象??
  72. ????????????//?Graphics?g=?buffImg.getGraphics();??
  73. ????????????Graphics2D?g?=?buffImg.createGraphics();??
  74. ??
  75. ????????????//?设置对线段的锯齿状边缘处理??
  76. ????????????g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,??
  77. ????????????????????RenderingHints.VALUE_INTERPOLATION_BILINEAR);??
  78. ??
  79. ????????????g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null),?srcImg??
  80. ????????????????????.getHeight(null),?Image.SCALE_SMOOTH),?0,?0,?null);??
  81. ??
  82. ????????????if?(null?!=?degree)?{??
  83. ????????????????//?设置水印旋转??
  84. ????????????????g.rotate(Math.toRadians(degree),??
  85. ????????????????????????(double)?buffImg.getWidth()?/?2,?(double)?buffImg??
  86. ????????????????????????????????.getHeight()?/?2);??
  87. ????????????}??
  88. ??
  89. ????????????//?水印图象的路径?水印一般为gif或者png的，这样可设置透明度??
  90. ????????????ImageIcon?imgIcon?=?new?ImageIcon(iconPath);??
  91. ??
  92. ????????????//?得到Image对象。??
  93. ????????????Image?img?=?imgIcon.getImage();??
  94. ??
  95. ????????????float?alpha?=?0.5f;?//?透明度??
  96. ????????????g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,??
  97. ????????????????????alpha));??
  98. ??
  99. ????????????//?表示水印图片的位置??
  100. ????????????g.drawImage(img,?150,?300,?null);??
  101. ??
  102. ????????????g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));??
  103. ??
  104. ????????????g.dispose();??
  105. ??
  106. ????????????os?=?new?FileOutputStream(targerPath);??
  107. ??
  108. ????????????//?生成图片??
  109. ????????????ImageIO.write(buffImg,?"JPG",?os);??
  110. ??
  111. ????????????System.out.println("图片完成添加Icon印章。。。。。。");??
  112. ????????}?catch?(Exception?e)?{??
  113. ????????????e.printStackTrace();??
  114. ????????}?finally?{??
  115. ????????????try?{??
  116. ????????????????if?(null?!=?os)??
  117. ????????????????????os.close();??
  118. ????????????}?catch?(Exception?e)?{??
  119. ????????????????e.printStackTrace();??
  120. ????????????}??
  121. ????????}??
  122. ????}??
  123. }??

  ?原始图片myblog_01.jpg:

  
  

  ?

  水印图片blog_logo.png：?
  

  添加水印后的效果图：

  
  

  ?

  水印图标旋转的效果图：

  
  

  ?

  ?

  [二]、文字水印

  Java代码??
  1. package?michael.io.image;??
  2. ??
  3. import?java.awt.AlphaComposite;??
  4. import?java.awt.Color;??
  5. import?java.awt.Font;??
  6. import?java.awt.Graphics2D;??
  7. import?java.awt.Image;??
  8. import?java.awt.RenderingHints;??
  9. import?java.awt.image.BufferedImage;??
  10. import?java.io.File;??
  11. import?java.io.FileOutputStream;??
  12. import?java.io.InputStream;??
  13. import?java.io.OutputStream;??
  14. ??
  15. import?javax.imageio.ImageIO;??
  16. ??
  17. /**?
  18. ?*?文字水印?
  19. ?*?@blog?http://sjsky.iteye.com?
  20. ?*?@author?Michael?
  21. ?*/??
  22. public?class?ImageMarkLogoByText?{??
  23. ??
  24. ????/**?
  25. ?????*?@param?args?
  26. ?????*/??
  27. ????public?static?void?main(String[]?args)?{??
  28. ????????String?srcImgPath?=?"d:/test/michael/myblog_01.jpg";??
  29. ????????String?logoText?=?"[?测试文字水印?http://sjsky.iteye.com?]";??
  30. ????????String?targerPath?=?"d:/test/michael/img_mark_text.jpg";??
  31. ??
  32. ????????String?targerPath2?=?"d:/test/michael/img_mark_text_rotate.jpg";??
  33. ??
  34. ????????//?给图片添加水印??
  35. ????????ImageMarkLogoByText.markByText(logoText,?srcImgPath,?targerPath);??
  36. ??
  37. ????????//?给图片添加水印,水印旋转-45??
  38. ????????ImageMarkLogoByText.markByText(logoText,?srcImgPath,?targerPath2,?-45);??
  39. ????}??
  40. ??
  41. ????/**?
  42. ?????*?给图片添加水印?
  43. ?????*?@param?logoText?
  44. ?????*?@param?srcImgPath?
  45. ?????*?@param?targerPath?
  46. ?????*/??
  47. ????public?static?void?markByText(String?logoText,?String?srcImgPath,??
  48. ????????????String?targerPath)?{??
  49. ????????markByText(logoText,?srcImgPath,?targerPath,?null);??
  50. ????}??
  51. ??
  52. ????/**?
  53. ?????*?给图片添加水印、可设置水印的旋转角度?
  54. ?????*?@param?logoText?
  55. ?????*?@param?srcImgPath?
  56. ?????*?@param?targerPath?
  57. ?????*?@param?degree?
  58. ?????*/??
  59. ????public?static?void?markByText(String?logoText,?String?srcImgPath,??
  60. ????????????String?targerPath,?Integer?degree)?{??
  61. ????????//?主图片的路径??
  62. ????????InputStream?is?=?null;??
  63. ????????OutputStream?os?=?null;??
  64. ????????try?{??
  65. ????????????Image?srcImg?=?ImageIO.read(new?File(srcImgPath));??
  66. ??
  67. ????????????BufferedImage?buffImg?=?new?BufferedImage(srcImg.getWidth(null),??
  68. ????????????????????srcImg.getHeight(null),?BufferedImage.TYPE_INT_RGB);??
  69. ??
  70. ????????????//?得到画笔对象??
  71. ????????????//?Graphics?g=?buffImg.getGraphics();??
  72. ????????????Graphics2D?g?=?buffImg.createGraphics();??
  73. ??
  74. ????????????//?设置对线段的锯齿状边缘处理??
  75. ????????????g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,??
  76. ????????????????????RenderingHints.VALUE_INTERPOLATION_BILINEAR);??
  77. ??
  78. ????????????g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null),?srcImg??
  79. ????????????????????.getHeight(null),?Image.SCALE_SMOOTH),?0,?0,?null);??
  80. ??
  81. ????????????if?(null?!=?degree)?{??
  82. ????????????????//?设置水印旋转??
  83. ????????????????g.rotate(Math.toRadians(degree),??
  84. ????????????????????????(double)?buffImg.getWidth()?/?2,?(double)?buffImg??
  85. ????????????????????????????????.getHeight()?/?2);??
  86. ????????????}??
  87. ??
  88. ????????????//?设置颜色??
  89. ????????????g.setColor(Color.red);??
  90. ??
  91. ????????????//?设置?Font??
  92. ????????????g.setFont(new?Font("宋体",?Font.BOLD,?30));??
  93. ??
  94. ????????????float?alpha?=?0.5f;??
  95. ????????????g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,??
  96. ????????????????????alpha));??
  97. ??
  98. ????????????//?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)?.??
  99. ????????????g.drawString(logoText,?150,?300);??
  100. ??
  101. ????????????g.dispose();??
  102. ??
  103. ????????????os?=?new?FileOutputStream(targerPath);??
  104. ??
  105. ????????????//?生成图片??
  106. ????????????ImageIO.write(buffImg,?"JPG",?os);??
  107. ??
  108. ????????????System.out.println("图片完成添加文字印章。。。。。。");??
  109. ????????}?catch?(Exception?e)?{??
  110. ????????????e.printStackTrace();??
  111. ????????}?finally?{??
  112. ????????????try?{??
  113. ????????????????if?(null?!=?is)??
  114. ????????????????????is.close();??
  115. ????????????}?catch?(Exception?e)?{??
  116. ????????????????e.printStackTrace();??
  117. ????????????}??
  118. ????????????try?{??
  119. ????????????????if?(null?!=?os)??
  120. ????????????????????os.close();??
  121. ????????????}?catch?(Exception?e)?{??
  122. ????????????????e.printStackTrace();??
  123. ????????????}??
  124. ????????}??
  125. ????}??
  126. }??

  ?添加文字水印后的效果图如下：

  
  

  ?

  文字旋转后的效果图如下：

  
  

  ?

  本文连接：http://sjsky.iteye.com/blog/1154390

  转载自：Michael's blog @?http://sjsky.iteye.com?