使用 BufferedImage 类裁剪图像的Java程序

在Java编程语言中，我们需要一些类来裁剪图像。所以这些类如下：

1.要读取和写入图像文件，我们必须导入 File 类。此类通常表示文件和目录路径名。

import java.io.File

2.为了处理错误，我们使用 IOException 类。

import java.io.IOException

3.为了保存图像，我们创建了 BufferedImage 对象，我们使用 BufferedImage 类。该对象用于在 RAM 中存储图像。

import java.awt.image.BufferedImage

4.要执行图像读写操作，我们将导入 ImageIO 类。此类具有读取和写入图像的静态方法。

import javax.imageio.ImageIO

方法：

1. 更改图像的尺寸
2. 使用 BufferedImage 类和 Color c 的一些内置方法

例子：

Java

// Java Program to Crop Image Using BufferedImage Class
 
// Importing required packages
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
 
// Main class
public class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Try block to check for exceptions
        try {
 
            // Reading original image from local path by
            // creating an object of BufferedImage class
            BufferedImage originalImg = ImageIO.read(
                new File("D:/test/Image.jpeg"));
 
            // Fetching and printing alongside the
            // dimensions of original image using getWidth()
            // and getHeight() methods
            System.out.println("Original Image Dimension: "
                               + originalImg.getWidth()
                               + "x"
                               + originalImg.getHeight());
 
            // Creating a subimage of given dimensions
            BufferedImage SubImg
                = originalImg.getSubimage(50, 50, 50, 50);
 
            // Printing Dimensions of new image created
            System.out.println("Cropped Image Dimension: "
                               + SubImg.getWidth() + "x"
                               + SubImg.getHeight());
 
            // Creating new file for cropped image by
            // creating an object of File class
            File outputfile
                = new File("D:/test/ImageCropped.jpeg");
 
            // Writing image in new file created
            ImageIO.write(SubImg, "jpg", outputfile);
 
            // Display message on console representing
            // proper execution of program
            System.out.println(
                "Cropped Image created successfully");
        }
 
        // Catch block to handle the exceptions
        catch (IOException e) {
 
            // Print the exception along with line number
            // using printStackTrace() method
            e.printStackTrace();
        }
    }
}

输出：

Cropped Image created successfully

此外，执行程序后，控制台将显示一条已执行的消息，并在输入的路径上创建一个新的裁剪图像，如下所示：