Java代碼實現給圖片添加文字浮水印 詳細教程一__Java

項目需求:編輯進行編輯的文章，添加浮水印的效果 程式碼

package image;import java.awt.Color;import java.awt.Font;import java.awt.Graphics2D;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import javax.imageio.ImageIO;/** * @author 無名 * @Date 2017/12/29 * @use 利用Java代碼給圖片加浮水印 */public class WaterMarkUtils {
<span class="hljs-javadoc">/** *<span class="hljs-javadoctag"> @param</span> srcImgPath 源圖片路徑 *<span class="hljs-javadoctag"> @param</span> tarImgPath 儲存的圖片路徑 *<span class="hljs-javadoctag"> @param</span> waterMarkContent 浮水印內容 *<span class="hljs-javadoctag"> @param</span> markContentColor 浮水印顏色 *<span class="hljs-javadoctag"> @param</span> font 浮水印字型 */</span><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">addWaterMark</span>(String srcImgPath, String tarImgPath, String waterMarkContent,Color markContentColor,Font font) {    <span class="hljs-keyword">try</span> {        <span class="hljs-comment">// 讀取原圖片資訊</span>        File srcImgFile = <span class="hljs-keyword">new</span> File(srcImgPath);<span class="hljs-comment">//得到檔案</span>        Image srcImg = ImageIO.read(srcImgFile);<span class="hljs-comment">//檔案轉化為圖片</span>        <span class="hljs-keyword">int</span> srcImgWidth = srcImg.getWidth(<span class="hljs-keyword">null</span>);<span class="hljs-comment">//擷取圖片的寬</span>        <span class="hljs-keyword">int</span> srcImgHeight = srcImg.getHeight(<span class="hljs-keyword">null</span>);<span class="hljs-comment">//擷取圖片的高</span>        <span class="hljs-comment">// 加浮水印</span>        BufferedImage bufImg = <span class="hljs-keyword">new</span> BufferedImage(srcImgWidth, srcImgHeight, BufferedImage.TYPE_INT_RGB);        Graphics2D g = bufImg.createGraphics();        g.drawImage(srcImg, <span class="hljs-number">0</span>, <span class="hljs-number">0</span>, srcImgWidth, srcImgHeight, <span class="hljs-keyword">null</span>);        g.setColor(markContentColor); <span class="hljs-comment">//根據圖片的背景設定浮水印顏色</span>        g.setFont(font);              <span class="hljs-comment">//設定字型</span>        <span class="hljs-comment">//設定浮水印的座標</span>        <span class="hljs-keyword">int</span> x = srcImgWidth - <span class="hljs-number">2</span>*getWatermarkLength(waterMarkContent, g);          <span class="hljs-keyword">int</span> y = srcImgHeight - <span class="hljs-number">2</span>*getWatermarkLength(waterMarkContent, g);          g.drawString(waterMarkContent, x, y);  <span class="hljs-comment">//畫出浮水印</span>        g.dispose();          <span class="hljs-comment">// 輸出圖片  </span>        FileOutputStream outImgStream = <span class="hljs-keyword">new</span> FileOutputStream(tarImgPath);          ImageIO.write(bufImg, <span class="hljs-string">"jpg"</span>, outImgStream);        System.out.println(<span class="hljs-string">"添加浮水印完成"</span>);          outImgStream.flush();          outImgStream.close();      } <span class="hljs-keyword">catch</span> (Exception e) {        <span class="hljs-comment">// TODO: handle exception</span>    }}<span class="hljs-keyword">public</span> <span class="hljs-keyword">int</span> <span class="hljs-title">getWatermarkLength</span>(String waterMarkContent, Graphics2D g) {      <span class="hljs-keyword">return</span> g.getFontMetrics(g.getFont()).charsWidth(waterMarkContent.toCharArray(), <span class="hljs-number">0</span>, waterMarkContent.length());  }  <span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">main</span>(String[] args) {    Font font = <span class="hljs-keyword">new</span> Font(<span class="hljs-string">"微軟雅黑"</span>, Font.PLAIN, <span class="hljs-number">35</span>);                     <span class="hljs-comment">//浮水印字型</span>    String srcImgPath=<span class="hljs-string">"H:/安靜時寫寫/寫寫部落格/Java實現給圖片添加浮水印/s.jpg"</span>; <span class="hljs-comment">//源圖片地址</span>    String tarImgPath=<span class="hljs-string">"H:/安靜時寫寫/寫寫部落格/Java實現給圖片添加浮水印/t.jpg"</span>; <span class="hljs-comment">//待儲存的地址</span>    String waterMarkContent=<span class="hljs-string">"圖片來源：http://blog.csdn.net/zjq_1314520"</span>;  <span class="hljs-comment">//浮水印內容</span>    Color color=<span class="hljs-keyword">new</span> Color(<span class="hljs-number">255</span>,<span class="hljs-number">255</span>,<span class="hljs-number">255</span>,<span class="hljs-number">128</span>);                               <span class="hljs-comment">//浮水印圖片色彩以及透明度</span>    <span class="hljs-keyword">new</span> WaterMarkUtils().addWaterMark(srcImgPath, tarImgPath, color, waterMarkContent,font);}
}最後效果

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