Java调用计算机摄像头拍照实现过程解析

Java调用计算机摄像头照相（Rest API的页面操作）

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

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