java圖片裁切工具類

import java.awt.Rectangle;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.util.Iterator;

import javax.imageio.ImageIO;

import javax.imageio.ImageReadParam;

import javax.imageio.ImageReader;

import javax.imageio.stream.ImageInputStream;
public class ImgCutUtil {

/** 
 * @param args 
 */  
public static void main(String[] args) {  

    ImgCutUtil.cut(30, 50, 300, 400, "d:/1.jpg", "d:/100.jpg");  

}  

/** 
 * 圖片裁切 
 * @param x1 選擇區域左上角的x坐標 
 * @param y1 選擇區域左上角的y坐標 
 * @param width 選擇區域的寬度 
 * @param height 選擇區域的高度 
 * @param sourcePath 源圖片路徑 
 * @param descpath 裁切后圖片的保存路徑 
 */  
public static void cut(int x1, int y1, int width, int height,  
        String sourcePath, String descpath) {  

    FileInputStream is = null;  
    ImageInputStream iis = null;  
    try {  
        is = new FileInputStream(sourcePath);  
        String fileSuffix = sourcePath.substring(sourcePath  
                .lastIndexOf(".") + 1);  
        Iterator<ImageReader> it = ImageIO  
                .getImageReadersByFormatName(fileSuffix);  
        ImageReader reader = it.next();  
        iis = ImageIO.createImageInputStream(is);  
        reader.setInput(iis, true);  
        ImageReadParam param = reader.getDefaultReadParam();  
        Rectangle rect = new Rectangle(x1, y1, width, height);  
        param.setSourceRegion(rect);  
        BufferedImage bi = reader.read(0, param);  
        ImageIO.write(bi, fileSuffix, new File(descpath));  
    } catch (Exception ex) {  
        ex.printStackTrace();  
    } finally {  
        if (is != null) {  
            try {  
                is.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
            is = null;  
        }  
        if (iis != null) {  
            try {  
                iis.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
            iis = null;  
        }  
    }  

}  


}  </pre>