用java 对图片的截图、拼接、合成处理、添加文字

[java]

import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
/**
* @Description:图片处理工具
* @author:liuyc
* @time:2016年5月27日上午10:18:00
*/
public class ImageHandleHelper {
/**
* @Description:截图
* @author:liuyc
* @time:2016年5月27日上午10:18:23
* @param srcFile源图片、targetFile截好后图片全名、startAcross 开始截取位置横坐标、StartEndlong开始截图位置纵坐标、width截取的长，hight截取的高
*/
public static void cutImage(String srcFile, String targetFile, int startAcross, int StartEndlong, int width,
int hight) throws Exception {
// 取得图片读入器
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg");
ImageReader reader = readers.next();
// 取得图片读入流
InputStream source = new FileInputStream(srcFile);
ImageInputStream iis = ImageIO.createImageInputStream(source);
reader.setInput(iis, true);
// 图片参数对象
ImageReadParam param = reader.getDefaultReadParam();
Rectangle rect = new Rectangle(startAcross, StartEndlong, width, hight);
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param);
ImageIO.write(bi, targetFile.split("\\.")[1], new File(targetFile));
}
/**
* @Description:图片拼接（注意：必须两张图片长宽一致哦）
* @author:liuyc
* @time:2016年5月27日下午5:52:24
* @param files 要拼接的文件列表
* @param type1 横向拼接， 2 纵向拼接
*/
public static void mergeImage(String[] files, int type, String targetFile) {
int len = files.length;
if (len < 1) {
throw new RuntimeException("图片数量小于1");
}
File[] src = new File[len];
BufferedImage[] images = new BufferedImage[len];
int[][] ImageArrays = new int[len][];
for (int i = 0; i < len; i++) {
try {
src[i] = new File(files[i]);
images[i] = ImageIO.read(src[i]);
} catch (Exception e) {
throw new RuntimeException(e);
}
int width = images[i].getWidth();
int height = images[i].getHeight();
ImageArrays[i] = new int[width * height];
ImageArrays[i] = images[i].getRGB(0, 0, width, height, ImageArrays[i], 0, width);
}
int newHeight = 0;
int newWidth = 0;
for (int i = 0; i < images.length; i++) {
// 横向
if (type == 1) {
newHeight = newHeight > images[i].getHeight() ? newHeight : images[i].getHeight();
newWidth += images[i].getWidth();
} else if (type == 2) {// 纵向
newWidth = newWidth > images[i].getWidth() ? newWidth : images[i].getWidth();
newHeight += images[i].getHeight();
}
}
if (type == 1 && newWidth < 1) {
return;
}
if (type == 2 && newHeight < 1) {
return;
}
// 生成新图片
try {
BufferedImage ImageNew = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
int height_i = 0;
int width_i = 0;
for (int i = 0; i < images.length; i++) {
if (type == 1) {
ImageNew.setRGB(width_i, 0, images[i].getWidth(), newHeight, ImageArrays[i], 0,
images[i].getWidth());
width_i += images[i].getWidth();
} else if (type == 2) {
ImageNew.setRGB(0, height_i, newWidth, images[i].getHeight(), ImageArrays[i], 0, newWidth);
height_i += images[i].getHeight();
}
}
//输出想要的图片
ImageIO.write(ImageNew, targetFile.split("\\.")[1], new File(targetFile));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description:小图片贴到大图片形成一张图(合成)
* @author:liuyc
* @time:2016年5月27日下午5:51:20
*/
public static final void overlapImage(String bigPath, String smallPath, String outFile) {
try {
BufferedImage big = ImageIO.read(new File(bigPath));
BufferedImage small = ImageIO.read(new File(smallPath));
Graphics2D g = big.createGraphics();
int x = (big.getWidth() - small.getWidth()) / 2;
int y = (big.getHeight() - small.getHeight()) / 2;
g.drawImage(small, x, y, small.getWidth(), small.getHeight(), null);
g.dispose();
ImageIO.write(big, outFile.split("\\.")[1], new File(outFile));
} catch (Exception e) {
throw new RuntimeException(e);
}
}

[java]

1. /**
2. * @Description:给图片添加文字信息
3. * @author:liuyc
4. * @time:2016年5月31日上午10:23:36
5. */
6. public static void drawStringForImage(String filePath, String content, Color contentColor, float qualNum,String targetFile) {
7. ImageIcon imgIcon = new ImageIcon(filePath);
8. Image theImg = imgIcon.getImage();
9. int width = theImg.getWidth(null) == -1 ? 200 : theImg.getWidth(null);
10. int height = theImg.getHeight(null) == -1 ? 200 : theImg.getHeight(null);
11. BufferedImage bimage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
12. Graphics2D g = bimage.createGraphics();
13. g.setColor(contentColor);
14. g.setBackground(Color.red);
15. g.drawImage(theImg, 0, 0, null);
16. // 设置字体、字型、字号
17. g.setFont(new Font(null, Font.BOLD, 13));
18. // 写入文字
19. g.drawString(content, 10, height / 2);
20. g.dispose();
21. FileOutputStream out =null;
22. try {
23. out = new FileOutputStream(targetFile);
24. JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
25. JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bimage);
26. param.setQuality(qualNum, true);
27. encoder.encode(bimage, param);
28. out.flush();
29. } catch (Exception e) {
30. throw new RuntimeException(e);
31. }finally {
32. if (out != null) {
33. try {
34. out.close();
35. } catch (IOException e) {
36. out = null;
37. throw new RuntimeException(e);
38. }
39. }
40. }
41. }
43. }

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本文来源：https://blog.csdn.net/u010197591/article/details/51536030

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