?? 將一圖片同比例縮小繪制.htm
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<a href="2009023.html" target=_blank>用JSP生成JPEG圖片</a> [2004-01-16]<br><a href="2009026.html" target=_blank>JSP調用JavaBean在網頁上動態生成柱狀圖</a> [2004-01-16]<br><a href="600520419.html" target=_blank>一個瀏覽圖片程序</a> [2004-11-16]<br><a href="13004003160.html" target=_blank>JSP生成驗證碼源程序</a> [2005-04-11]<br></table></td>
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<td height="36" align="center" valign="middle" bgcolor="#FFFFFF" style="word-break:break-all" class="title"><strong>將一圖片同比例縮小繪制</strong></td>
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<td height="40" align="right" valign="middle" bgcolor="#FFFFFF" style="word-break:break-all">作者：whilvydy
文章來源：<a href="http://http://www.jspcn.net" target=_blank>http://www.jspcn.net</a><br>
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<iframe name="ad" frameborder=0 width=30 height=10 scrolling=no src=../count.jsp?news_id=417></iframe>
次 加入時間：2004-11-14</td>
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<td height="623" align="left" valign="top" class="content">在獲得客戶端的一個圖片后，發現傳過來的圖片太大，不宜在已經排版好的格式里面顯示出來，特別是頁面的圖片特別多時，更不能都讓大圖片縮小顯示。<br>一般遇到圖片問題，有以下幾種解決方案：<br><br><strong>一、規定（自定義）圖片大小</strong><br>在該位置，圖片是多大就顯示多大，<br>這種情況簡單易行，但圖片易變形，圖片太大，導致頁面打開速度過慢<br><br><strong>二、獲得圖片尺寸</strong><br>也因圖片過大，不宜在圖片過多的也面中顯示<br><br>下面介紹一種方法，可以<font color="#DC143C">讀取大圖片并生成一個小圖片</font>，以解決圖片問題。<br><br><table bgcolor="#CCCCCC" bordercolor="#666666" borderColorDark="#CCCCCC" borderColorLight="#666666" width="100%" border="1" cellpadding="0" cellspacing="4"><tr><td align="left" style="WORD-BREAK: break-all"><br>/*<br> * Created on 2004-10-11<br> *<br> * TODO To change the template for this generated file go to<br> * Window - Preferences - Java - Code Style - Code Templates<br> */<br>package net.jspcn.test;<br><br>import java.io.File; <br>import java.io.FileOutputStream; <br>import java.awt.Image; <br>import java.awt.image.BufferedImage; <br><br>import com.sun.image.codec.jpeg.JPEGCodec; <br>import com.sun.image.codec.jpeg.JPEGImageEncoder; <br><br>public class JpgTest { <br><br>public void jpgTset() throws Exception{ <br><br>File _file = new File("d:\\1.jpg"); //讀入文件 <br>Image src = javax.imageio.ImageIO.read(_file); //構造Image對象 <br>int wideth=src.getWidth(null); //得到源圖寬 <br>int height=src.getHeight(null); //得到源圖長 <br>BufferedImage tag = new BufferedImage(wideth/2,height/2,BufferedImage.TYPE_INT_RGB); <br>tag.getGraphics().drawImage(src,0,0,wideth/2,height/2,null); //繪制縮小后的圖 <br>FileOutputStream out=new FileOutputStream("D:\\newfile.jpg"); //輸出到文件流 <br>//File file = new File("D:\\newFile.jpg"); <br>JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);<br>//JPEGImageEncoder encoder = JPEGCodec.c<br>encoder.encode(tag); //近JPEG編碼 <br>out.close(); <br>} <br>public static void main(String[] args){ <br><br>try{ <br>new JpgTest().jpgTset(); <br>}catch(Exception e){ <br><br>e.printStackTrace(); <br>} <br>} <br>} <br></td></tr></table><br><br><br>當然，在此基礎上，你可以寫一圖片處理程序，批量的處理你的圖片</td>
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<td height="29" align="right" valign="middle"><a href="../read_review.jsp?news_id=417">查看該新聞的相關評論</a></td>
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<td height="32" align="center"> <INPUT name=from type=text class=inputCls id="from" value="您的郵件" size="25" onClick="this.value=''" onFocus=this.select() onMouseOver=this.focus()>
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<td height="20" align="left" valign="top" bgcolor="#999999"><font color="#333333"><strong>相關文章鏈接</strong></font></td>
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<td height="53" align="left" valign="top"><a href="2009023.html" target=_blank>用JSP生成JPEG圖片</a> [2004-01-16]<br><a href="2009026.html" target=_blank>JSP調用JavaBean在網頁上動態生成柱狀圖</a> [2004-01-16]<br><a href="600520419.html" target=_blank>一個瀏覽圖片程序</a> [2004-11-16]<br><a href="13004003160.html" target=_blank>JSP生成驗證碼源程序</a> [2005-04-11]<br></td>
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