本文實例講述了java實現的圖片裁剪功能。分享給大家供大家參考，具體如下：
PicCut.java：
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package Tsets;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 PicCut { public void cut(int x,int y,int width,int height,String srcpath,String subpath) throws IOException {//裁剪方法 FileInputStream is = null; ImageInputStream iis = null; try { is = new FileInputStream(srcpath); //讀取原始圖片 Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName("jpg"); //ImageReader聲稱能夠解碼指定格式 ImageReader reader = it.next(); iis = ImageIO.createImageInputStream(is); //獲取圖片流 reader.setInput(iis, true); //將iis標記為true（只向前搜索）意味著包含在輸入源中的圖像將只按順序讀取 ImageReadParam param = reader.getDefaultReadParam(); //指定如何在輸入時從 Java Image I/O框架的上下文中的流轉換一幅圖像或一組圖像 Rectangle rect = new Rectangle(x, y, width, height); //定義空間中的一個區域 param.setSourceRegion(rect); //提供一個 BufferedImage，將其用作解碼像素數據的目標。 BufferedImage bi = reader.read(0, param); //讀取索引imageIndex指定的對象 ImageIO.write(bi, "jpg", new File(subpath)); //保存新圖片 } finally { if (is != null) is.close(); if (iis != null) iis.close(); } } public static void main(String[] args) throws Exception { PicCut pc = new PicCut(); pc.cut(20, 20, 100, 100,"D:\\1.jpg","D:\\11.jpg"); System.out.println("ok"); }} |
希望本文所述對大家java程序設計有所幫助。
