openoffice+pdf2swf实现在线转换office文档，实现在线预览

利用队列+多线程实现文档在线转换：

主意：为什么要用 队列+线程 ，因为openoffice的转换任务，如果文档过大，多次调用转换就会卡掉，再次利用队列，在转换的过程中其他转换任务处于队列的等待状态，只有转换成功后再调用下个转换任务

第一步：创建一个线程池，（上篇博客有写）

package com.cloud.job;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;/** * * @ClassName: ThreadPool * @author caixl * @date 2016-6-3 下午4:50:00 * */public class ThreadPool {private static ExecutorService threadPool = null;public static ExecutorService getThreadPool(){if(threadPool==null){threadPool = Executors.newCachedThreadPool();}return threadPool;}}

第二步：创建一个无界队列（上篇博客有写）

package com.cloud.job;import java.util.concurrent.LinkedBlockingQueue;/** * * @ClassName: TaskQueue * @author caixl * @date 2016-6-3 下午4:49:50 * */public class TaskQueue {private static  LinkedBlockingQueue queues = null;public static LinkedBlockingQueue getTaskQueue(){if(queues==null){queues =  new LinkedBlockingQueue();System.out.println("初始化 队列");}return queues;}public static void add(Object obj){if(queues==null)queues =  getTaskQueue();if(!queues.contains(obj))queues.offer(obj);System.out.println("-------------------------------");System.out.println("入队："+obj);}}

第三步：创建一个入队的线程，专门负责往队列中加入元素

package com.cloud.job;/** * * @ClassName: Produce * @author caixl * @date 2016-6-3 下午4:49:41 * */public class Produce implements Runnable {private static volatile boolean isRunning=true;private static volatile Object obj;public Produce(Object obj){this.obj = obj;}public void run() {TaskQueue.add(obj);}}

第四步：创建一个消费的线程，次线程主要负责阻塞作用，也就是转换任务转换任务是否已完成，如果完成调用下一次转换

package com.cloud.job;import org.apache.log4j.Logger;import com.cloud.platform.DocConstants;/** * * @ClassName: Consumer * @author caixl * @date 2016-6-3 下午4:48:46 * */public class Consumer implements Runnable {private static Consumer consumer;private static Logger logger = Logger.getLogger(Consumer.class);public static volatile boolean isRunning=true;public void run() {while(isRunning)          { isRunning = false;DocCovertThread docCovertThread = new DocCovertThread();docCovertThread.run();        }}public static Consumer getInstance(){if(consumer==null){consumer = new Consumer();System.out.println("初始化消费线程");logger.info("初始化消费线程");}return consumer;}}

第五步：创建一个转换文档的线程

package com.cloud.job;import java.io.File;import java.util.Map;import org.apache.log4j.Logger;import org.artofsolving.jodconverter.OfficeDocumentConverter;import org.artofsolving.jodconverter.document.DefaultDocumentFormatRegistry;import org.artofsolving.jodconverter.document.DocumentFormat;import org.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration;import org.artofsolving.jodconverter.office.OfficeManager;import org.quartz.JobExecutionContext;import com.cloud.doc.convert.pdf2swf;import com.cloud.platform.DocConstants;import com.database.bean.MainTableAttachFile;/** * * @ClassName: DocCovertThread * @author caixl * @date 2016-6-3 下午4:49:15 * */public class DocCovertThread implements Runnable{private static Logger logger = Logger.getLogger(DocCovertThread.class);/** * openoffice的安装路径 */public static final String OPENOFFICE_HOME = DocConstants.ROOTPATH + "include/OpenOffice";@Overridepublic void run() {try {  JobExecutionContext context = (JobExecutionContext)TaskQueue.getTaskQueue().take();  System.out.println("出队"+context);  Map data = context.getJobDetail().getJobDataMap();      MainTableAttachFile attach = (MainTableAttachFile)data.get("attach");      if (attach == null) {         return;      }      if (DocConstants.isOffice(com.common.StringHelper.getFileExt(attach.getAttachFileName())))      {      System.out.println("开始转换文件"+OPENOFFICE_HOME+"  "  +attach.getPath());        DefaultOfficeManagerConfiguration config = new DefaultOfficeManagerConfiguration();        config.setOfficeHome(OPENOFFICE_HOME);        OfficeManager officeManager = config.buildOfficeManager();        try        {          officeManager.start();          OfficeDocumentConverter converter = new OfficeDocumentConverter(officeManager);          DocumentFormat outputFormat = new DefaultDocumentFormatRegistry().getFormatByExtension("pdf");                    String srcPath = attach.getPath();          String destPath = com.common.StringHelper.getFileName(srcPath) + ".pdf";                    converter.convert(new File(srcPath), new File(destPath), outputFormat);          String docPath = com.common.StringHelper.getFileName(attach.getPath());      pdf2swf swfConverter = pdf2swf.getInstance();      swfConverter.convert(docPath, "");        }        catch (Exception e)        {         e.printStackTrace();          logger.error("***** 异常信息 ***** 方法：switchDocToSwf at switch office to pdf", e); return;        }        finally        {          officeManager.stop();          Consumer.isRunning=true;        }        System.out.println("转换结束");      }} catch (InterruptedException e) {e.printStackTrace();Consumer.isRunning=true;logger.error("***** 异常信息 ***** 方法：DocConvertJob execute", e);}}}

第六步：在需要转换文档时调用

          ExecutorService threadPool = ThreadPool.getThreadPool();  Produce consumer2 = new Produce(context);  threadPool.execute(consumer2);  Consumer consumer=Consumer.getInstance();  threadPool.execute(consumer);

源码详见：https://github.com/izhbg/typz