Java壓縮或放大圖像處理
大量的圖片如何統一處理成固定寬度、或者固定長寬的圖片，java中的java.awt包下面的一些類就可以實現圖片處理的功能，下面就是自己寫的一個簡單的實例
下面的類是單張圖片的處理，里面的參數含義可以參照參數命名：
/*
@Description: 壓縮或放大圖像處理
*/
package cn.lulei.image.deal;
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;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class DealImage {
private File file = null;
private String inputDir;
private String outputDir;
private String inputFileName;
private String outputFileName;
private int outputWidth;
private int outputHeight;
private boolean proportion;//是否等比壓縮
public DealImage() {
this.inputDir = "";
this.outputDir = "";
this.inputFileName = "";
this.outputFileName = "";
this.outputHeight = 200;
this.outputWidth = 200;
this.proportion = true;
}
public void setInputDir(String inputDir){
this.inputDir = inputDir;
}
public void setOutputDir(String outputDir){
this.outputDir = outputDir;
}
public void setInputFileName(String inputFileName){
this.inputFileName = inputFileName;
}
public void setOutputFileName(String outputFileName){
this.outputFileName = outputFileName;
}
public void setWidthAngHeight(int outputWidth, int outputHeight){
this.outputWidth = outputWidth;
this.outputHeight = outputHeight;
}
/**
* @param isVip
* @Date: 2013-8-7
* @Author: lulei
* @Description:處理圖片
*/
private void dealImage(boolean isVip) {
try {
this.file = new File(this.inputDir + this.inputFileName);
if (!this.file.exists()){
return;
}
Image img = ImageIO.read(this.file);
if (img.getWidth(null) == -1) {
return;
}
int[] widthAndHeight = this.getNewWidthAndHeight(img);
BufferedImage bufferedImage = new BufferedImage(widthAndHeight[0], widthAndHeight[1], BufferedImage.TYPE_INT_RGB);
Graphics2D g = bufferedImage.createGraphics();
g.drawImage(img.getScaledInstance(widthAndHeight[0], widthAndHeight[1], Image.SCALE_SMOOTH), 0, 0, null);
if (!isVip) {
g.setFont(new Font("楷體", Font.ITALIC, 14));
g.setColor(Color.getHSBColor(1.0f, 0.3f, 1.0f));
g.drawString("想要添加的水印", widthAndHeight[0]/3, widthAndHeight[1]/2);
}
File fileOut = new File(this.outputDir);
if (!fileOut.exists()) {
fileOut.mkdirs();
}
FileOutputStream fileOutputStream = new FileOutputStream(this.outputDir + this.outputFileName);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(fileOutputStream);
encoder.encode(bufferedImage);
g.dispose();
fileOutputStream.close();
} catch (Exception e) {
// e.printStackTrace();
System.out.println("There're some errors when handling picture which path is :" + this.inputDir + this.inputFileName);
}
}
/**
* @param inputDir
* @param inputFileName
* @param outputDir
* @param outputFileName
* @param isVip
* @Date: 2013-8-7
* @Author: lulei
* @Description:處理圖片
*/
public void dealImage(String inputDir, String inputFileName, String outputDir, String outputFileName, boolean isVip) {
this.dealImage(inputDir, inputFileName, outputDir, outputFileName, this.outputWidth, this.outputHeight, this.proportion, isVip);
}
/**
* @param inputDir
* @param inputFileName
* @param outputDir
* @param outputFileName
* @param outputWidth
* @param outputHeight
* @param isVip
* @Date: 2013-8-7
* @Author: lulei
* @Description:處理圖片
*/
public void dealImage(String inputDir, String inputFileName, String outputDir, String outputFileName, int outputWidth, int outputHeight, boolean isVip) {
this.dealImage(inputDir, inputFileName, outputDir, outputFileName, outputWidth, outputHeight, this.proportion, isVip);
}
/**
* @param inputDir
* @param inputFileName
* @param outputDir
* @param outputFileName
* @param outputWidth
* @param outputHeight
* @param proportion
* @param isVip
* @Date: 2013-8-7
* @Author: lulei
* @Description:處理圖片
*/
public void dealImage(String inputDir, String inputFileName, String outputDir, String outputFileName, int outputWidth, int outputHeight, boolean proportion, boolean isVip) {
this.inputDir = inputDir;
this.inputFileName = inputFileName;
this.outputDir = outputDir;
this.outputFileName = outputFileName;
this.outputWidth = outputWidth;
this.outputHeight = outputHeight;
this.proportion = proportion;
this.dealImage(isVip);
}
/**
* @param img
* @return
* @Date: 2013-8-7
* @Author: lulei
* @Description:返回壓縮后的圖片寬和高
*/
private int[] getNewWidthAndHeight(Image img){
int[] reInt = new int[2];
if (this.proportion) {
double rateW = ((double)img.getWidth(null)) / (double)this.outputWidth + 0.1;
double rateH = ((double)img.getHeight(null)) / (double)this.outputHeight + 0.1;
double rate = rateW > rateH ? rateW :rateH;
reInt[0] = (int)(((double)img.getWidth(null)) / rate);
reInt[1] = (int)(((double)img.getHeight(null)) / rate);
} else {
reInt[0] = this.outputWidth;
reInt[1] = this.outputHeight;
}
return reInt;
}
}
下面的類是對圖片文件或者圖片文件夾做統一的處理：
Java代碼 收藏代碼
/**
*@Description: 批處理文件夾下的所有圖片
*/
package cn.lulei.image.deal;
import java.io.File;
import cn.lulei.image.deal.DealImage;
public class DealImageFile {
//圖片后綴名
private static String[] IMG_TYPE = {".jpg",".bmp",".jpeg",".png",".pcx",".tiff",".gif",".tga",".exif"
,".fpx",".svg",".psd","cdr",".pcd",".dxf",".ufo",".eps",".hdri",".ai",".raw"};
private static int outputHeight = 200;
private static int outputWidth = 200;
private static int count = 0;
private static boolean proportion = true;
public String dealImageFile(String inputDir, String outputDir) {
return this.dealImageFile(inputDir, outputDir, outputWidth, outputHeight, proportion);
}
public String dealImageFile(String inputDir, String outputDir, int outputWidth, int outputHeight) {
return this.dealImageFile(inputDir, outputDir, outputWidth, outputHeight, proportion);
}
/**
* @param inputDir
* @param outputDir
* @param outputWidth
* @param outputHeight
* @param proportion
* @return
* @Date: 2013-8-7
* @Author: lulei
* @Description:批處理文件夾下的文件
*/
public String dealImageFile(String inputDir, String outputDir, int outputWidth, int outputHeight, boolean proportion) {
File fileDir = new File(inputDir);
File[] files = fileDir.listFiles();
DealImage dealImage = new DealImage();
for (File file : files) {
String imgPath = file.toString().toLowerCase();
String fileName = imgPath.substring(inputDir.length());
if (this.isImage(imgPath)) {
dealImage.dealImage(inputDir, fileName, outputDir, fileName, outputWidth, outputHeight, proportion, true);
count++;
} else if (file.isDirectory()) {
if (!imgPath.equals(outputDir.toLowerCase())) {
//這里是遞歸
this.dealImageFile(imgPath, outputDir + "/" + fileName, outputWidth, outputHeight, proportion);
}
}
}
return "Handle " + count + " pictures! ";
}
private boolean isImage(String imgPath) {
for (String str : IMG_TYPE) {
if (imgPath.endsWith(str)) {
return true;
}
}
return false;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
}
} </pre>
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