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+package io.jpress.utils;
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+
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+import javax.imageio.ImageIO;
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+import javax.imageio.ImageReadParam;
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+import javax.imageio.ImageReader;
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+import javax.imageio.stream.ImageInputStream;
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+import javax.imageio.stream.ImageOutputStream;
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+import java.awt.*;
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+import java.awt.image.BufferedImage;
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+import java.io.*;
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+import java.net.URL;
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+import java.util.Iterator;
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+
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+/**
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+ * Created by 黄诚天 on 2017-09-13.
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+ */
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+public class OperateImage {
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+ // ===源图片路径名称如:c:\1.jpg
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+ private String srcpath;
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+
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+ // ===剪切图片存放路径名称.如:c:\2.jpg
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+ private String subpath;
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+
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+ //源图片数据
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+ private BufferedImage sourceImg;
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+
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+ // ===剪切点x坐标
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+ private int x;
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+ private int y;
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+
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+ // ===剪切点宽度
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+ private int width;
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+ private int height;
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+
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+ public OperateImage() {
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+ }
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+
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+ public OperateImage(int x, int y, int width, int height) {
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+ this.x = x;
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+ this.y = y;
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+ this.width = width;
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+ this.height = height;
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+ }
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+
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+ /**
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+ * 对图片裁剪，并把裁剪完蛋新图片保存 。
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+ */
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+ public File cut(String type) throws IOException {
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+ FileInputStream is = null;
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+ InputStream inputStream = null;
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+ ImageInputStream iis = null;
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+
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+ try {
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+ // 读取图片文件
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+ //is = new FileInputStream(srcpath);
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+
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+ ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
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+ ImageOutputStream imageOutput = ImageIO.createImageOutputStream(byteArrayOutputStream);
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+ ImageIO.write(this.sourceImg, type, imageOutput);
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+ inputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
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+
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+ /*
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+ * 返回包含所有当前已注册 ImageReader 的 Iterator，这些 ImageReader
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+ * 声称能够解码指定格式。 参数：formatName - 包含非正式格式名称 .
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+ *（例如 "jpeg" 或 "tiff"）等 。
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+ */
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+ Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName(
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+ type);
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+ ImageReader reader = it.next();
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+ // 获取图片流
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+ iis = ImageIO.createImageInputStream(inputStream);
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+
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+ /*
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+ * <p>iis:读取源.true:只向前搜索 </p>.将它标记为 ‘只向前搜索’。
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+ * 此设置意味着包含在输入源中的图像将只按顺序读取，可能允许 reader
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+ * 避免缓存包含与以前已经读取的图像关联的数据的那些输入部分。
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+ */
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+ reader.setInput(iis, true);
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+
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+ /*
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+ * <p>描述如何对流进行解码的类<p>.用于指定如何在输入时从 Java Image I/O
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+ * 框架的上下文中的流转换一幅图像或一组图像。用于特定图像格式的插件
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+ * 将从其 ImageReader 实现的 getDefaultReadParam 方法中返回
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+ * ImageReadParam 的实例。
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+ */
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+ ImageReadParam param = reader.getDefaultReadParam();
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+
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+ /*
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+ * 图片裁剪区域。Rectangle 指定了坐标空间中的一个区域，通过 Rectangle 对象
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+ * 的左上顶点的坐标（x，y）、宽度和高度可以定义这个区域。
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+ */
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+ Rectangle rect = new Rectangle(x, y, width, height);
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+
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+ // 提供一个 BufferedImage，将其用作解码像素数据的目标。
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+ param.setSourceRegion(rect);
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+
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+ /*
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+ * 使用所提供的 ImageReadParam 读取通过索引 imageIndex 指定的对象，并将
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+ * 它作为一个完整的 BufferedImage 返回。
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+ */
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+ BufferedImage bi = reader.read(0, param);
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+
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+ // 保存新图片
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+ ImageIO.write(bi, type, new File(subpath));
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+ File cutImage = new File(subpath);
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+
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+ return cutImage;
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+ } finally {
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+ if (is != null) {
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+ is.close();
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+ }
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+
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+ if (inputStream != null) {
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+ inputStream.close();
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+ }
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+
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+ if (iis != null) {
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+ iis.close();
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+ }
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+ }
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+ }
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+
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+ public static BufferedImage getIconInfo(String iconUrl) {
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+ BufferedImage sourceImg = null;
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+ try {
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+ InputStream murl = new URL(iconUrl).openStream();
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+ sourceImg = ImageIO.read(murl);
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+ System.out.println(sourceImg.getWidth()); // 源图宽度
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+ System.out.println(sourceImg.getHeight()); // 源图高度
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+ System.out.println(sourceImg.getWidth() * sourceImg.getHeight());
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+ System.out.println(sourceImg.getData());
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+ } catch (IOException e) {
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+ e.printStackTrace();
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+ }
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+
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+
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+ return sourceImg;
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+ }
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+
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+ public int getHeight() {
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+ return height;
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+ }
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+
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+ public void setHeight(int height) {
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+ this.height = height;
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+ }
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+
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+ public String getSrcpath() {
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+ return srcpath;
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+ }
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+
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+ public void setSrcpath(String srcpath) {
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+ this.srcpath = srcpath;
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+ }
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+
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+ public String getSubpath() {
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+ return subpath;
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+ }
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+
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+ public BufferedImage getSourceImg() {
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+ return sourceImg;
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+ }
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+
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+ public void setSourceImg(BufferedImage sourceImg) {
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+ this.sourceImg = sourceImg;
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+ }
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+
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+ public void setSubpath(String subpath) {
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+ this.subpath = subpath;
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+ }
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+
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+ public int getWidth() {
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+ return width;
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+ }
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+
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+ public void setWidth(int width) {
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+ this.width = width;
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+ }
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+
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+ public int getX() {
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+ return x;
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+ }
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+
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+ public void setX(int x) {
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+ this.x = x;
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+ }
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+
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+ public int getY() {
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+ return y;
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+ }
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+
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+ public void setY(int y) {
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+ this.y = y;
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+ }
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+}
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huangct