Java调用计算机摄像头拍照实现过程解析

使用开源组件webcam-capture：https://github.com/sarxos/webcam-capture

项目源码GitHub：https://github.com/muphy1112/RuphyRecorder

本例子使用基于Java rest API的页面操作，方便远程拍照

新建Spring Boot项目

pop.xml

<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<project xmlns=\"http://maven.apache.org/POM/4.0.0\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"
     xsi:schemaLocation=\"http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd\">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.5.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>
  <groupId>me.muphy</groupId>
  <artifactId>recorder</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>recorder</name>
  <description>Demo project for Spring Boot</description>

  <properties>
    <java.version>1.8</java.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
      <groupId>com.github.sarxos</groupId>
      <artifactId>webcam-capture</artifactId>
      <version>0.3.12</version>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
      <exclusions>
        <exclusion>
          <groupId>org.junit.vintage</groupId>
          <artifactId>junit-vintage-engine</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

</project>

server.port=8080

#保存根路径

record.path=E:/workspace/share/

index.html

<!DOCTYPE html>
<html lang=\"en\">
<head>
  <meta charset=\"UTF-8\">
  <title>莫非照相机</title>
</head>
<body>
<div>
  <div><span><a href=\"/tp\" rel=\"external nofollow\" >拍照</a></span></div>
</div>
</body>
</html>

CameraController.java

package me.muphy.camera;

import me.muphy.servicce.CameraService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class CameraController {

  @Autowired
  private CameraService cameraService;

  @GetMapping(\"/tp\")
  public String takePictures(String[] args) {
    String msg = cameraService.takePictures();
    return \"<div><span>\" + msg + \"</span></div><div>\" +
        \"<span><a href=\\\"/ll?d=/picture\\\" >点击查看所有照片</a></span>\" +
        \"<span style=\\\"margin-left: 20px;\\\"><a href=\\\"/\\\" >返回首页</a></span></div>\";
  }
}

CameraService.java

package me.muphy.servicce;

import com.github.sarxos.webcam.Webcam;
import com.github.sarxos.webcam.WebcamResolution;
import com.github.sarxos.webcam.WebcamUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

@Service
public class CameraService {

  @Value(\"${download.path:E:/workspace/download/}\")
  private String downloadPath;

  public String takePictures() {
    Webcam webcam = Webcam.getDefault();
    if (webcam == null) {
      return \"没有找到摄像设备！\";
    }
    String filePath = downloadPath + \"/picture/\" + new SimpleDateFormat(\"yyyy-MM-dd\").format(new Date());
    File path = new File(filePath);
    if (!path.exists()) {//如果文件不存在，则创建该目录
      path.mkdirs();
    }
    String time = new SimpleDateFormat(\"yyyMMdd_HHmmss\").format(new Date());
    File file = new File(filePath + \"/\" + time + \".jpg\");
    webcam.setViewSize(WebcamResolution.VGA.getSize());
    WebcamUtils.capture(webcam, file);
    return \"拍照成功！\";
  }
}

CameraApplication.java

package me.muphy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class CameraApplication {

  public static void main(String[] args) {
    SpringApplication.run(CameraApplication.class, args);
  }

}

当前电脑没有摄像头，因此是正常的