OpenOffice预览

1.Servlet

package com.ly.jxjhgl.views.servlet;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintWriter;

import java.io.UnsupportedEncodingException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;

/**
 * 查看培养方案-年级专业信息附件预览
 * @author 林诗景
 * @date 2018-3-07
 */
public class NjzyServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html;charset=UTF-8";
    private static final long serialVersionUID = 1L;
    private static int DEFAULT_BUFFER_SIZE = 102400; //10kb

    public NjzyServlet() {
        super();
    }

    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    }

    public void doGet(HttpServletRequest request,
                      HttpServletResponse response) throws UnsupportedEncodingException,
                                                           IOException {
        ServletContext context = this.getServletContext();
        String path =
            context.getInitParameter("njzy_path"); //获取web.xml的context-param参数，值为/jwxt/njzy
        String filePath = path + File.separator + request.getParameter("name");
        File file = new File(filePath);
        BufferedInputStream bis = null;
        BufferedOutputStream bos = null;
        PrintWriter pw = null;
        if (!file.exists()) {
            response.setContentType(CONTENT_TYPE);
            pw = response.getWriter();
            pw.print("<html>");
            pw.print("<head><title>附件丢失</title></head>");
            pw.print("<body>");
            pw.print("<p>附件丢失，请重新上传或联系管理员。</p>");
            pw.print("</body></html>");
            pw.close();
            return;
        }
        /*
        String userAgent = request.getHeader("User-Agent");
        if (userAgent.contains("MSIE") ||
            userAgent.contains("Trident")) { //IE内核浏览器
            filename = URLEncoder.encode(file.getName(), "UTF-8");
        } else { //非IE内核浏览器
            filename =
                    new String(file.getName().getBytes("UTF-8"), "ISO-8859-1");
        }
        */
        String filename = null;
        String contentType = context.getMimeType(file.getName());
        response.setBufferSize(DEFAULT_BUFFER_SIZE);
        response.setContentType(contentType);
        response.setHeader("Content-Length", String.valueOf(file.length()));
        response.setHeader("Content-Disposition", "filename=\"" + filename + "\"");
        bis = new BufferedInputStream(new FileInputStream(file), DEFAULT_BUFFER_SIZE);
        bos = new BufferedOutputStream(response.getOutputStream(), DEFAULT_BUFFER_SIZE);
        IOUtils.copy(bis, bos);
        IOUtils.closeQuietly(bis);
        IOUtils.closeQuietly(bos);
    }
}

2.web.xml

<?xml version = '1.0' encoding = 'UTF-8'?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         version="2.5" xmlns="http://java.sun.com/xml/ns/javaee">
  <context-param>
    <param-name>njzy_path</param-name>
    <param-value>/jwxt/njzy</param-value>
  </context-param>
  <servlet>
    <servlet-name>njzyServlet</servlet-name>
    <servlet-class>com.ly.jxjhgl.views.servlet.NjzyServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>njzyServlet</servlet-name>
    <url-pattern>/njzy</url-pattern>
  </servlet-mapping>
</web-app>

3.页面和Java代码
页面

<af:popup id="p1" contentDelivery="lazyUncached"
          autoCancel="disabled" binding="#{newPyfaBean.richPop}">
  <af:dialog type="none" title="附件" id="d32">
    <af:panelGroupLayout id="pgl3">
      <af:inlineFrame source="#{newPyfaBean.url}"
                      inlineStyle="height:700px;width:1000px;"
                      styleClass="AFStretchWidth" shortDesc="预览"
                      id="if1"/>
    </af:panelGroupLayout>
  </af:dialog>
</af:popup>

Java代码

package com.ly.jxjhgl.jxjhpyfa.VO.CustomerVO;

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;

import com.ly.jxjhgl.views.utils.ADFUtils;

import com.ly.jxjhgl.views.utils.JSFUtils;

import java.io.File;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.net.ConnectException;

import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;

import javax.servlet.http.HttpServletRequest;

import oracle.adf.share.ADFContext;
import oracle.adf.share.logging.ADFLogger;
import oracle.adf.view.rich.component.rich.RichPopup;

import oracle.jbo.Row;
import oracle.jbo.domain.BlobDomain;
import oracle.jbo.server.ViewObjectImpl;

import org.apache.commons.io.IOUtils;


public class NewPyfaBean {
    private ADFLogger log = ADFLogger.createADFLogger(NewPyfaBean.class);
    private RichPopup richPop;
    private static String TYPE_PDF = ".pdf";

    public NewPyfaBean() {
    }


    /**
     * 附件预览
     * @param actionEvent
     */
    public void preview(ActionEvent actionEvent) {
        String path = JSFUtils.getInitParameter("njzy_path"); //获取web.xml的context-param参数，值为/jwxt/njzy
        File dir = new File(path);
        if (dir.exists()) {
            this.removeDir(dir); //如果目录存在，则先删除再创建。
        }
        dir.mkdirs();
        ViewObjectImpl vo = (ViewObjectImpl)ADFUtils.findIterator("JxjhPyfaNjzyxxVo1Iterator").getViewObject();
        Row row = vo.getCurrentRow();
        String wjmc = row.getAttribute("Wjmc") == null ? "" : row.getAttribute("Wjmc").toString(); //文件名称
        String filePath = path + File.separator + wjmc;
        File file = new File(filePath);
        String pdfFilename = wjmc.substring(0, wjmc.lastIndexOf(".")) + TYPE_PDF; //OpenOffice预览文件只支持PDF格式
        if (wjmc.endsWith(TYPE_PDF) || wjmc.endsWith(".doc") ||
            wjmc.endsWith(".docx") || wjmc.endsWith(".xls") ||
            wjmc.endsWith(".xlsx")) {
            BlobDomain blob = (BlobDomain)row.getAttribute("Wj"); //数据库BLOB类型字段
            try {
                OutputStream outputStream = new FileOutputStream(filePath);
                IOUtils.copy(blob.getBinaryStream(), outputStream);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            OpenOfficeConnection conn = new SocketOpenOfficeConnection("127.0.0.1", 8100);
            if (!wjmc.endsWith(TYPE_PDF)) {
                File pdfFile = new File(path + File.separator + pdfFilename);
                DocumentConverter converter = new StreamOpenOfficeDocumentConverter(conn);
                converter.convert(file, pdfFile);
                ADFContext.getCurrent().getPageFlowScope().put("wjmc", pdfFilename);
                JSFUtils.showPopup(richPop);
            }
        } else {
            JSFUtils.addFacesInformationMessage("预览只支持excel,word,pdf格式的文件。");
            return;
        }
    }

    /**
     *获取系统的URL
     * @return
     */
    public String getUrl() {
        ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();
        Object obj = ec.getRequest();
        if (obj instanceof HttpServletRequest) {
            HttpServletRequest request = (HttpServletRequest)obj;
            String path = request.getRequestURL().toString();
            path = path.substring(0, path.lastIndexOf("/faces") + 6);
            //找到web.xml里的url-pattern值为/njzy对应的Servlet
            return path + "/njzy?name=" + ADFContext.getCurrent().getPageFlowScope().get("wjmc");
        }
        return null;
    }

    /**
     * 删除文件夹下所有文件，递归
     * @param directory
     * @return
     */
    private boolean removeDir(File directory) {
        if (directory.isDirectory()) {
            String[] fileList = directory.list();
            for (String file : fileList) {
                boolean flag = removeDir(new File(directory, file));
                if (!flag) {
                    return false;
                }
            }
        }
        return directory.delete(); //此时目录为空，可以删除
    }

    public void setRichPop(RichPopup richPop) {
        this.richPop = richPop;
    }

    public RichPopup getRichPop() {
        return richPop;
    }
}

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