jquery.media.js实现前端页面预览

钮晓东

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前端

前端代码

<body>
<section layout:fragment="content">
	<div class="form-group">
		<div class="col-md-6">
			<button type="button" class="btn btn-default" onclick="toView('D:\\2.doc')">预览doc</button>
			<button type="button" class="btn btn-default" onclick="toView('D:\\3.docx')">预览docx</button>
			<button type="button" class="btn btn-default" onclick="toPdfView('D:\\4.pdf')">预览pdf</button>
			<button type="button" class="btn btn-default" onclick="toPdfView('D:\\5.pdf')">预览pdf</button>
		</div>
	</div>
	<div class="modal fade" aria-labelledby="预览" aria-hidden="true" id="previewModal">
		<div class="modal-dialog" style="width:1000px;height:800px;">
			<div class="modal-content">
				<div class="modal-header">
					<button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
				</div>
				<div class="modal-body"></div>
			</div>
		</div>
	</div>
	<script type="text/javascript" src="js/jquery.media.js" th:src="@{/js/jquery.media.js}"></script>
	<script th:inline="javascript">
	function toView(filePath){
		var url = [[@{/converter/preview}]]+'?filePath='+filePath;
		$(".modal-body").empty();
		$(".modal-body").load(url);
		$("#previewModal").modal();
	}
	
	function toPdfView(filePath){
		var url = [[@{/converter/viewPdf}]]+'?filePath='+filePath;
		$(".modal-body").empty();
		$(".modal-body").append('<a class="media">预览pdf</a>');
		$("a.media").attr("href",[[@{/converter/viewPdf}]]+'?filePath='+filePath);
		$("#previewModal").modal();
		$("a.media").attr("href",url)
		$("a.media").media({width:960,height:800});
	}
	
	$("#previewModal").on("hide.bs.modal",function(){
		$(this).removeData("bs.modal");
	});
	</script>
</section>
</body>

java代码

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import com.bjdjjs.utils.converter.WordToHtml;

@Controller
@RequestMapping(value = "/converter")
public class OfficeConterverController {
	
	protected final Logger logger = LoggerFactory.getLogger(OfficeConterverController.class);
	
	@Value("${image.temp.folder}")
	private String ImageTempFolder;
	
	@Value("${server.context-path}")
	private String contextPath;
	
	@RequestMapping(value = "/preview")
	public String preview(HttpServletResponse response,
			@RequestParam(value = "filePath", required=true) String filePath){
		logger.info("预览文件:"+filePath);
		WordToHtml wh = new WordToHtml(ImageTempFolder,contextPath);
		ByteArrayOutputStream htmlOutputStream = wh.change(filePath);
		try{
			BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream());
			bos.write(htmlOutputStream.toByteArray());
			bos.close();
			htmlOutputStream.flush();
		}catch (Exception e) {
			e.printStackTrace();
		} finally{
			if(htmlOutputStream != null){
				try {
					htmlOutputStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return null;
	}
	
	@RequestMapping(value = "/viewPdf")
	public String viewPdf(HttpServletResponse response,
			@RequestParam(value = "filePath", required=true) String filePath){
		logger.info("预览文件:"+filePath);
		response.setContentType("application/pdf");
		try{
			InputStream pdfInputStream = new FileInputStream(filePath);
			BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream());
			int pdfByte;
			while((pdfByte = pdfInputStream.read()) != -1){
				bos.write(pdfByte);
			}
			pdfInputStream.close();
			bos.close();
			
		}catch (Exception e) {
			e.printStackTrace();
			return null;
		} 
		return null;
	}
	
	@RequestMapping(value = "/fetchImage")
	public String fetchImage(HttpServletResponse response,
			@RequestParam(value = "n", required=true) String fileName){
		logger.info("获取图片:"+fileName);
		try {
			BufferedImage image = ImageIO.read(new File(ImageTempFolder+fileName));
			ImageIO.write(image, "png", response.getOutputStream());
			response.setContentType("image/png");
			ImageIO.write(image, "png", response.getOutputStream());
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}
	
	@RequestMapping(value = "/test")
	public String test(){
		logger.info("测试页面");
		return "test/preview";
	}
	
}

工具类

package com.bjdjjs.utils.converter;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import javax.imageio.ImageIO;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.converter.PicturesManager;
import org.apache.poi.hwpf.converter.WordToHtmlConverter;
import org.apache.poi.hwpf.usermodel.Picture;
import org.apache.poi.hwpf.usermodel.PictureType;
import org.apache.poi.xwpf.converter.core.BasicURIResolver;
import org.apache.poi.xwpf.converter.core.FileImageExtractor;
import org.apache.poi.xwpf.converter.core.FileURIResolver;
import org.apache.poi.xwpf.converter.core.IURIResolver;
import org.apache.poi.xwpf.converter.xhtml.XHTMLConverter;
import org.apache.poi.xwpf.converter.xhtml.XHTMLOptions;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFPictureData;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;


public class WordToHtml {
	
	protected final Logger logger = LoggerFactory.getLogger(WordToHtml.class);
	
	private String ImageTempFolder;
	
	private String contextPath;
	
	//返回图片请求地址
	private static String ImageRequestMap = "/converter/fetchImage?n=";
	
	private static String WORD2003 = "doc";
	
	private static String WORD2007 = "docx";
	
	public WordToHtml(String imageTempFolder,String contextPath){
		this.ImageTempFolder = imageTempFolder;
		this.contextPath = contextPath;
	}
	
	public  ByteArrayOutputStream change(String filePath) {
		 int index = filePath.lastIndexOf(".");
		 String fileType = filePath.substring(index+1, filePath.length());
	     try {
	    	 if(WORD2003.equalsIgnoreCase(fileType))
	            return convert2Html(filePath);  
	    	 else if(WORD2007.equalsIgnoreCase(fileType))
	    		 return xconvert2Html(filePath);
	        } catch (Exception e) {  
	            e.printStackTrace();
	        }
	     return null;
    }
	
	public  ByteArrayOutputStream convert2Html(String filePath)  
            throws TransformerException, IOException,  
            ParserConfigurationException {  
        HWPFDocument wordDocument = new HWPFDocument(new FileInputStream(filePath));//创建一个文档  
        WordToHtmlConverter wordToHtmlConverter = new WordToHtmlConverter(  
                DocumentBuilderFactory.newInstance().newDocumentBuilder()  
                        .newDocument());//对普通文本的操作
         wordToHtmlConverter.setPicturesManager( new PicturesManager()  
         {  
             public String savePicture( byte[] content,  
                     PictureType pictureType, String suggestedName,  
                     float widthInches, float heightInches )  
             {  
                 return contextPath+ImageRequestMap+suggestedName;  
             }  
         } );//对图片的操作
        wordToHtmlConverter.processDocument(wordDocument);  
        //保存图片  
        List pics=wordDocument.getPicturesTable().getAllPictures();  
        if(pics!=null){  
            for(int i=0;i<pics.size();i++){  
                Picture pic = (Picture)pics.get(i);  
                System.out.println();  
                try {  
                    pic.writeImageContent(new FileOutputStream(ImageTempFolder  
                            + pic.suggestFullFileName()));  
                } catch (FileNotFoundException e) {  
                    e.printStackTrace();  
                }    
            }  
        }  
        Document htmlDocument = wordToHtmlConverter.getDocument();  
        ByteArrayOutputStream out = new ByteArrayOutputStream();  
        DOMSource domSource = new DOMSource(htmlDocument);  
        StreamResult streamResult = new StreamResult(out);  
        TransformerFactory tf = TransformerFactory.newInstance();  
        Transformer serializer = tf.newTransformer();  
        serializer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");  
        serializer.setOutputProperty(OutputKeys.INDENT, "yes");  
        serializer.setOutputProperty(OutputKeys.METHOD, "html");  
        serializer.transform(domSource, streamResult);  
        out.close();  
        return out;
    } 
	
	public ByteArrayOutputStream xconvert2Html(String filePath)  
            throws TransformerException, IOException,  
            ParserConfigurationException {  
        InputStream inputStream = new FileInputStream(new File(filePath));
        XWPFDocument document = new XWPFDocument(inputStream);
        XHTMLOptions options = XHTMLOptions.create().indent(1);
        File imageFolderFile =new File(ImageTempFolder);
        FileImageExtractor extractor = new FileImageExtractor(imageFolderFile);
        options.setExtractor(extractor);
        options.setIgnoreStylesIfUnused(false);
        options.setFragment(true);
        options.URIResolver(new BasicURIResolver(contextPath+ImageRequestMap));
        ByteArrayOutputStream out = new ByteArrayOutputStream(); 
        XHTMLConverter.getInstance().convert(document, out, options);
        out.close();
        return out;
    } 
}

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2018-01-05 11:08
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