spring纯注解+libreoffice

Posted 2020-10-06 终会飞翔

spring.version为4.3.10.RELEASE

aspectjweaver.version为1.8.10

libreoffice.version为5.2.0（juh、jurt、ridl、unoil四个相关jar包）

libreoffice核心包jodconverter-core为3.2-xwiki-SNAPSHOT

 

一、相关配置类 AppConfiguration

@Configuration //相当于beans.xml
@ComponentScan({"com.jingluu.converter.doc"}) //相当于 <context:component-scan base-package="com.jingluu.converter.doc"/>
@PropertySource({"classpath:converter.properties"}) //相当于 <context:property-placeholder location="classPath:converter.properties" />

二、web初始化加载 AppWebInitializer implements WebApplicationInitializer

　　　　 @Override
	public void onStartup(ServletContext servletContext) throws ServletException {
		//注解配置web.xml上下文
		AnnotationConfigWebApplicationContext rootAppContext = new AnnotationConfigWebApplicationContext();
		//注册配置类
		/*
		 * 相当于加载beans.xml
		 *  <context-param>
		 *    	<param-name>contextConfigLocation</param-name>
		 *    	<param-value>classpath:spring/applicationContext.xml</param-value>
		 *  </context-param>
		 */
		rootAppContext.register(AppConfiguration.class); 
		//设置ServletContext
		/*
		 * servlet上下文，相当于web.xml
		 */
		rootAppContext.setServletContext(servletContext);
		
		//添加监听器
		/*
		 * 相当于添加一个上下文监听
		 * <listener>
		 *      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
		 * </listener>
		 */
		ContextLoaderListener contextLoaderListener = new ContextLoaderListener(rootAppContext);
		/*
		 * 将配置的一个监听的机制存放到web.xml中
		 */
		servletContext.addListener(contextLoaderListener);
	}

三、ConverterProperties （获取我们在配置文件中内容）

@Component
public class ConverterProperties {
	
	@Value("${converter.office.home}")
	private String officeHome;
	
	@Value("${converter.office.ports}")
	private String officePorts;

	public String getOfficeHome() {
		return officeHome;
	}

	public String getOfficePorts() {
		return officePorts;
	}
	
}

四、DocConverter 和 DocConverterImpl

public interface DocConverter {
	/**
	 * 文本转换
	 * @param from 初始文件路径
	 * @param to 传出文件路径
	 */
	void converter(String from,String to);
	
	/**
	 * 文本转换
	 * @param from 
	 * @param to
	 */
	void converter(File from,File to);

}

/**
 * office文档转换实现类
 * @author kif
 *
 */
@Component
public class DocConverterImpl implements DocConverter{
	
	@Autowired
	private ConverterProperties converterProperties;
	//文件管理
	private OfficeManager officeManager;
	//文件转换
	private OfficeDocumentConverter offDocConverter;
	
	/**
	 * @PostConstruct 声明该方法在构造函数执行完之后被调用，且仅调用一次
	 * 相当于<init-method></init-method>
	 */
	@PostConstruct
	public void start(){
		//配置
		DefaultOfficeManagerConfiguration cfg = new DefaultOfficeManagerConfiguration();
		//指定OpenOffice或LibreOffice安装的根目录
		cfg.setOfficeHome(converterProperties.getOfficeHome());
		//LibreOffice处理进程的端口，多个用逗号隔开（如果设置了多个端口，将会启动多个处理进程）
		String portsNumbers = converterProperties.getOfficePorts();
		if(portsNumbers != null && !"".equals(portsNumbers.trim())){
			String[] ports = portsNumbers.split(",");
			int[] portList = new int[ports.length];
			for(int i=0;i<ports.length;i++){
				portList[i] = Integer.valueOf(ports[i]);
			}
			cfg.setPortNumbers(portList);
		}
		
		//officeManager
		officeManager = cfg.buildOfficeManager();
		
		//OfficeDocumentConverter文档转换器
		offDocConverter = new OfficeDocumentConverter(officeManager);
		System.out.println("Converter initialized ...");
		
		//启动文档转换器进程
		officeManager.start();
		System.out.println("converter start ...");
	}

	/**
	 * 进行转换
	 */
	public void converter(String from, String to) {
		this.converter(new File(from), new File(to));
	}

	@Override
	public void converter(File from, File to) {
		offDocConverter.convert(from, to);
	}
	
	/**
	 * 终止处理进程
	 * @PreDestroy 声明该方法在Bean销毁前被调用，仅调用一次
	 */
	@PreDestroy
	public void stop(){
		officeManager.stop();
		System.out.println("converter stop ...");
		
	}

}