利用OpenOffice實現word文檔在線預覽

項目中遇到的word文檔在線預覽需求，查閱很多資料決定利用openoffice轉換word文檔爲pdf/html進行預覽實現。

1.下載openoffice4安裝 www.openoffice.org；

2.導入相關jar包

<dependency>
		    <groupId>org.artofsolving.jodconverter</groupId>
		    <artifactId>jodconverter-core</artifactId>
		    <version>3.0-beta-3</version>
		</dependency>
	  	<dependency>
		    <groupId>com.artofsolving</groupId>
		    <artifactId>jodconverter</artifactId>
		    <version>2.2.1</version>
		    <exclusions>
		    	<exclusion>
		    		<artifactId>commons-io</artifactId>
		    		<groupId>commons-io</groupId>
		    	</exclusion>
		    </exclusions>
	  	</dependency>

3.openoffice服務啓動

安裝OpenOffice成功後，您可以進入<OpenOffice安裝目錄>/program/目錄並運行以下命令啓動OpenOffice服務：

soffice -headless -accept="socket,host=127.0.0.1,port=8100;urp;" -nofirststartwizard

4.openoffice轉換文檔代碼，這是一個工具類，將要預覽的文檔進行轉換

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import com.artofsolving.jodconverter.DocumentConverter;
import com.artofsolving.jodconverter.openoffice.connection.OpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.connection.SocketOpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.converter.StreamOpenOfficeDocumentConverter;

public class Doc2HtmlUtil {
	
	
    /**
     * 轉換文件成pdf
     * 
     * @param fromFileInputStream:
     * @throws IOException 
     */
    public static String file2pdf(InputStream fromFileInputStream, String toFilePath,String type) throws Exception{
        String timesuffix = IDUtil.getID();
        String docFileName = null;
        String htmFileName = null;
        if("doc".equals(type)){
            docFileName = timesuffix.concat(".doc");
            htmFileName = timesuffix.concat(".pdf");
        }else if("xls".equals(type)){
            docFileName = timesuffix.concat(".xls");
            htmFileName = timesuffix.concat(".pdf");
        }else if("ppt".equals(type)){
            docFileName = timesuffix.concat(".ppt");
            htmFileName = timesuffix.concat(".pdf");
        }else if("txt".equals(type)){
            docFileName = timesuffix.concat(".txt");
            htmFileName = timesuffix.concat(".pdf");
        }else{
        	return null;
        }

        File htmlOutputFile = new File(toFilePath + File.separatorChar + htmFileName);
        File docInputFile = new File(toFilePath + File.separatorChar + docFileName);
        if (htmlOutputFile.exists()){
        	htmlOutputFile.delete();
        }

		htmlOutputFile.createNewFile();

        docInputFile.createNewFile();
        
        /**
         * 由fromFileInputStream構建輸入文件
         */
        int bytesRead = 0;
        byte[] buffer = new byte[1024 * 8];
    	OutputStream os = new FileOutputStream(docInputFile);
		while ((bytesRead = fromFileInputStream.read(buffer)) != -1) {
		    os.write(buffer, 0, bytesRead);
		}
		os.close();
        fromFileInputStream.close();
        
        OpenOfficeConnection connection = new SocketOpenOfficeConnection(FSUtil.FS_FILE_CONVERT_HOST,8100);
		connection.connect();
        // convert
        DocumentConverter converter = new StreamOpenOfficeDocumentConverter(connection);
        converter.convert(docInputFile, htmlOutputFile);
        connection.disconnect();
        // 轉換完之後刪除word文件
        docInputFile.delete();
        return htmFileName;
    }
    /**
     * 文件轉換成Html
     * @param fromFileInputStream
     * @param toFilePath
     * @param type
     * @return
     * @throws Exception
     */
    public static String file2Html (InputStream fromFileInputStream, String toFilePath,String type) throws Exception{
		String timesuffix = IDUtil.getID();
        String docFileName = null;
        String htmFileName = null;
        if("doc".equals(type)){
            docFileName = timesuffix.concat(".doc");
            htmFileName = timesuffix.concat(".html");
        }else if("xls".equals(type)){
            docFileName = timesuffix.concat(".xls");
            htmFileName = timesuffix.concat(".html");
        }else if("ppt".equals(type)){
            docFileName = timesuffix.concat(".ppt");
            htmFileName = timesuffix.concat(".html");
        }else if("txt".equals(type)){
            docFileName = timesuffix.concat(".txt");
            htmFileName = timesuffix.concat(".html");
        }else if("pdf".equals(type)){
        	docFileName = timesuffix.concat(".pdf");
			htmFileName = timesuffix.concat(".html");
        }else{
        	return null;
        }
		File htmlOutputFile = new File(toFilePath + File.separatorChar + htmFileName);
        File docInputFile = new File(toFilePath + File.separatorChar + docFileName);
        if (htmlOutputFile.exists()){
        	htmlOutputFile.delete();
        }
		htmlOutputFile.createNewFile();
        docInputFile.createNewFile();
        /**
         * 由fromFileInputStream構建輸入文件
         */
        int bytesRead = 0;
        byte[] buffer = new byte[1024 * 8];
    	OutputStream os = new FileOutputStream(docInputFile);
		while ((bytesRead = fromFileInputStream.read(buffer)) != -1) {
		    os.write(buffer, 0, bytesRead);
		}
		os.close();
        fromFileInputStream.close();
        OpenOfficeConnection connection = new SocketOpenOfficeConnection(FSUtil.FS_FILE_CONVERT_HOST,8100);
		connection.connect();
        // convert
        DocumentConverter converter = new StreamOpenOfficeDocumentConverter(connection);
        converter.convert(docInputFile, htmlOutputFile);
        connection.disconnect();
        // 轉換完之後刪除word文件
        docInputFile.delete();
        return htmFileName;
	}	
}

5.action類調用轉換工具類進行轉換

//轉換爲pdf

@SuppressWarnings("deprecation")
	private String convertToPDF(HttpServletRequest request, String fileName, InputStream fromFileInputStream, String currentId) {
		if(FSUtil.isOfficeFile(fileName.toLowerCase())){
			String convertFileSavePath=request.getRealPath("/")+FSUtil.FS_HADOOP_FILE_CONVERT_PATH+File.separatorChar+currentId;
			File file=new File(convertFileSavePath);
			if(!file.exists()){
				file.mkdirs();
			}
			String type=fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
			try {
				if(type.endsWith("x")){
					return Doc2HtmlUtil.file2pdf(fromFileInputStream, convertFileSavePath, type.substring(0, type.length()-1));
				}else{
					return Doc2HtmlUtil.file2pdf(fromFileInputStream, convertFileSavePath, type);
				}
			} catch (Exception e) {
				log.error(e.getMessage());
				return null;
			}
		}
		return null;
	}

//轉換爲html
	@SuppressWarnings("deprecation")
	public String convertToHtml(HttpServletRequest request,String fileName, InputStream fromFileInputStream, String currentId){
		if(!FSUtil.isImage(fileName.toLowerCase())){
			String convertFileSavePath=request.getRealPath("/")+FSUtil.FS_HADOOP_FILE_CONVERT_PATH+File.separatorChar+currentId;
			File file=new File(convertFileSavePath);
			if(!file.exists()){
				file.mkdirs();
			}
			String type=fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
			try {
				if(type.endsWith("x")){
					return Doc2HtmlUtil.file2Html(fromFileInputStream, convertFileSavePath, type.substring(0, type.length()-1));
				}else{
					return Doc2HtmlUtil.file2Html(fromFileInputStream, convertFileSavePath, type);
				}
			} catch (Exception e) {
				log.error(e.getMessage());
				return null;
			}
		}
		return null;
	}

convertFileSavePath爲轉換後的PDF格式文檔絕對地址返回給前端利用瀏覽器打開是先預覽