Java小程序：批量图片处理（缩小和添加Logo）
【虎.无名】喜欢写Blog，经常上传照片，问题是照片通常都太大，相册空间又太小，通常都要做一些压缩处理。虽然windows自带的画图工具也可以完成，但是需要手工一个一个完成，我又是比较懒的人，所以，写了下面一个小工具，把图片按比例缩小x倍，或者添加一个Logo文字，关键是能批量处理，省事多了。如果需要使用，得改改main，代码很简单，我就不写详细使用手册了。import java.io.*;import java.awt.*;import java.awt.image.*;import com.sun.image.codec.jpeg.*;import javax.imageio.ImageIO;public class JpgTest {public static void jpg_logo(String jpgName, String logoText)throws Exception {File _file = new File(jpgName+".jpg");//读入文件Image src = ImageIO.read(_file);//构造Image对象int w0 = src.getWidth(null);//得到源图宽int h0 = src.getHeight(null); //得到源图长int w2 = 800;//=w0/2int h2 = 600;//=h0/2int fontSize = 32;//缩小一 半为（800,600）BufferedImage tag = null;tag = new BufferedImage(w2, h2, BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(src, 0, 0,w2, h2, null);//绘制缩小后的图//标注水印 Graphics g = tag.getGraphics();g.setColor(Color.RED);//以下设置前景色BLACK//g.setXORMode(Color.RED); g.setFont(new Font("MyFont", Font.BOLD, fontSize));//PLAIN,BOLD,ITALIC//g.drawString(logoText, 10, 10+fontSize); g.drawString(logoText, w2-fontSize*(logoText.length()+3)/2, h2-10); g.dispose(); //保存文件，输出到文件流 FileOutputStream out = new FileOutputStream(jpgName+"_800.jpg"); try {JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(tag); //近JPEG编码//System.out.print(width+"*"+h0); }finally{out.close();}}public static void jpg_logo()throws Exception {File _file = new File("test_old.jpg");//读入文件Image src = ImageIO.read(_file);//构造Image对象int w0=src.getWidth(null);//得到源图宽int h0=src.getHeight(null); //得到源图长//缩小一半BufferedImage tag = null;tag = new BufferedImage(w0/2,h0/2,BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(src,0,0,w0/2,h0/2,null);//绘制缩小后的图//标注水印 Graphics g = tag.getGraphics();//g.setColor(Color.BLACK); //以下设置前景色 g.setXORMode(Color.GREEN); g.setFont(new Font("MyFont", Font.ITALIC, 24)); g.drawString("www.Test.com", w0/4, h0/4); g.dispose(); //保存文件 FileOutputStream out = new FileOutputStream("test_new.jpg");//输出到文件流JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(tag); //近JPEG编码//System.out.print(width+"*"+h0); out.close();}public static void jpg_mini(String fn, int factor)throws Exception {Stringf0 = fn+".jpg";Filef = new File(f0);//读入文件Image src = ImageIO.read(f);//构造Image对象int w0 = src.getWidth(null);//得到源图宽int h0 = src.getHeight(null); //得到源图长if (w0<800)throw new Exception("w0<800");//-------------------------Stringf2 = fn+"_.jpg";int w2 = w0 / factor;int h2 = h0 / factor;BufferedImage tag = new BufferedImage(w2, h2,BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(src, 0, 0, w2, h2, null);//绘制缩小后的图System.out.println(f0+"("+w0+"*"+h0+") \t=> "+f2+"("+w2+"*"+h2+")"); //保存文件 FileOutputStream out = new FileOutputStream(f2);//输出到文件流JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(tag); //近JPEG编码out.close();}public static void jpg_rename(String fn)throws Exception {Filef0 = new File(fn+".jpg");f0.delete();Filef2 = new File(fn+"_.jpg");f2.renameTo(f0);}public static String zeroInt(int n, int len) {Strings = ""+n;for(int i=s.length(); i<len; i++) {s = '0'+s;}returns;}public static void jpg_mini(int factor, String fx, int idx0, int idx2, int iLen)throws Exception {//String fx = "D:/_拓展培训20060915/DSC_";//int idx0 = 624;//int idx2 = 656;String fn = null;for(int i=idx0; i<=idx2; i++) {fn = fx + zeroInt(i, iLen);//长度4 如：DSC_0168.JPGtry {jpg_mini(fn, factor);jpg_rename(fn);}catch(Exception e){System.out.println(fn+"..."+e);}}}public static void main(String args[])throws Exception {//jpg_logo();//jpg_mini("test_old");jpg_mini(4, "D:/_拓展培训20060915/DSC_", 1, 200, 4);//缩小4倍(0001-0200)//jpg_logo("P1010105", "2005-4-9");//jpg_logo("P1010086", "2005-4-9");//jpg_logo("P1010017", "2005-4-18");//Font f1 = Font.decode("宋体");//System.out.println(s);//Font f2 = Font.getFont("宋体");//System.out.println(s);}}
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