java调用摄像头进行拍照和保存

简单记录一下步骤，为了以后使用时方便。
1.创建一个springboot项目，pom依赖为

``
<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        
        **<!--这个是启动WebCam所必要的依赖-->**
        <dependency>
            <groupId>com.github.sarxos</groupId>
            <artifactId>webcam-capture</artifactId>
            <version>0.3.12</version>
        </dependency>
        
        
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

2.写一个测试类，代码为

package com.example.shexiangtou;
import com.github.sarxos.webcam.Webcam;
import com.github.sarxos.webcam.WebcamPanel;
import com.github.sarxos.webcam.WebcamResolution;
import com.github.sarxos.webcam.WebcamUtils;
import com.github.sarxos.webcam.util.ImageUtils;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TestWebCam {
    private static JFrame window;
    public static void main(String[] args) throws InterruptedException {
        Webcam webcam = Webcam.getDefault();
        webcam.setViewSize(WebcamResolution.VGA.getSize());
        WebcamPanel panel = new WebcamPanel(webcam);
        panel.setFPSDisplayed(true);
        panel.setDisplayDebugInfo(true);
        panel.setImageSizeDisplayed(true);
        panel.setMirrored(true);
        JFrame window = new JFrame("张世鹏的拍照小程序");
        window.add(panel);
        window.setResizable(true);
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.pack();
        window.setVisible(true);
        final JButton button = new JButton("点击进行拍照");
        window.add(panel, BorderLayout.CENTER);
        window.add(button, BorderLayout.SOUTH);
        window.setResizable(true);
        window.pack();
        window.setVisible(true);
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e)
            {
                button.setEnabled(false);  //设置按钮不可点击
                //实现拍照保存-------start
                String fileName = "D://" + System.currentTimeMillis();       **//保存路径即图片名称（不用加后缀）**
                WebcamUtils.capture(webcam, fileName, ImageUtils.FORMAT_PNG);
                SwingUtilities.invokeLater(new Runnable() {
                    @Override
                    public void run()
                    {
                        JOptionPane.showMessageDialog(null, "拍照成功");
                        button.setEnabled(true);    //设置按钮可点击
                        return;
                    }
                });
                //实现拍照保存-------end
            }
        });
    }
}