Springboot整合openoffice实现文件在线预览

一 下载安装openoffice

https://www.openoffice.org/download/https://www.openoffice.org/download/

我这里使用4.1.10 windows版本 

下载完后启动服务

运行→cmd，输入：

cd C:\Program Files (x86)\OpenOffice 4\program

回车

再输入

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

回车

二 springboot整合

1.引入依赖

        <dependency>
            <groupId>com.artofsolving</groupId>
            <artifactId>jodconverter</artifactId>
            <version>2.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.7</version>
        </dependency>

2.编写文件格式转换工具类

package com.lzl.util;

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

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;

/**
 * 文件格式转换工具类
 */
public class FileConvertUtil {

    /**
     * 默认转换后文件后缀
     */
    private static final String DEFAULT_SUFFIX = "pdf";
    /**
     * openoffice_port
     */
    private static final Integer OPENOFFICE_PORT = 8100;

    /**
     * 方法描述 office文档转换为PDF(处理本地文件)
     * @param sourcePath 源文件路径
     * @param suffix     源文件后缀
     * @return InputStream 转换后文件输入流
     */
    public static InputStream convertLocaleFile(String sourcePath, String suffix) throws Exception {
        File inputFile = new File(sourcePath);
        InputStream inputStream = new FileInputStream(inputFile);
        return covertCommonByStream(inputStream, suffix);
    }

    /**
     * 方法描述  office文档转换为PDF(处理网络文件)
     * @param netFileUrl 网络文件路径
     * @param suffix     文件后缀
     * @return InputStream 转换后文件输入流
     */
    public static InputStream convertNetFile(String netFileUrl, String suffix) throws Exception {
        // 创建URL
        URL url = new URL(netFileUrl);
        // 试图连接并取得返回状态码
        URLConnection urlconn = url.openConnection();
        urlconn.connect();
        HttpURLConnection httpconn = (HttpURLConnection) urlconn;
        int httpResult = httpconn.getResponseCode();
        if (httpResult == HttpURLConnection.HTTP_OK) {
            InputStream inputStream = urlconn.getInputStream();
            return covertCommonByStream(inputStream, suffix);
        }
        return null;
    }

    /**
     * 方法描述  将文件以流的形式转换
     *
     * @param inputStream 源文件输入流
     * @param suffix      源文件后缀
     * @return InputStream 转换后文件输入流
     */
    public static InputStream covertCommonByStream(InputStream inputStream, String suffix) throws Exception {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        OpenOfficeConnection connection = new SocketOpenOfficeConnection(OPENOFFICE_PORT);
        connection.connect();
        DocumentConverter converter = new StreamOpenOfficeDocumentConverter(connection);
        DefaultDocumentFormatRegistry formatReg = new DefaultDocumentFormatRegistry();
        DocumentFormat targetFormat = formatReg.getFormatByFileExtension(DEFAULT_SUFFIX);
        DocumentFormat sourceFormat = formatReg.getFormatByFileExtension(suffix);
        converter.convert(inputStream, sourceFormat, out, targetFormat);
        connection.disconnect();
        return outputStreamConvertInputStream(out);
    }

    /**
     * 方法描述 outputStream转inputStream
     */
    public static ByteArrayInputStream outputStreamConvertInputStream(final OutputStream out) throws Exception {
        ByteArrayOutputStream baos = (ByteArrayOutputStream) out;
        return new ByteArrayInputStream(baos.toByteArray());
    }

}

3.编写工具类

package com.lzl.util;

import org.apache.commons.lang3.StringUtils;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class SmartStringUtil extends StringUtils {

    // ===============split =======================

    public static Set<String> splitConvertToSet(String str, String split) {
        if (isEmpty(str)) {
            return new HashSet<String>();
        }
        String[] splitArr = str.split(split);
        HashSet<String> set = new HashSet<String>(splitArr.length);
        for (String string : splitArr) {
            set.add(string);
        }
        return set;
    }

    public static List<String> splitConvertToList(String str, String split) {
        if (isEmpty(str)) {
            return new ArrayList<String>();
        }
        String[] splitArr = str.split(split);
        ArrayList<String> list = new ArrayList<String>(splitArr.length);
        for (String string : splitArr) {
            list.add(string);
        }
        return list;
    }

    // ===============split Integer=======================

    public static List<Integer> splitConverToIntList(String str, String split, int defaultVal) {
        if (isEmpty(str)) {
            return new ArrayList<Integer>();
        }
        String[] strArr = str.split(split);
        List<Integer> list = new ArrayList<Integer>(strArr.length);
        for (int i = 0; i < strArr.length; i++) {
            try {
                int parseInt = Integer.parseInt(strArr[i]);
                list.add(parseInt);
            } catch (NumberFormatException e) {
                list.add(defaultVal);
                continue;
            }
        }
        return list;
    }

    public static Set<Integer> splitConverToIntSet(String str, String split, int defaultVal) {
        if (isEmpty(str)) {
            return new HashSet<Integer>();
        }
        String[] strArr = str.split(split);
        HashSet<Integer> set = new HashSet<Integer>(strArr.length);
        for (int i = 0; i < strArr.length; i++) {
            try {
                int parseInt = Integer.parseInt(strArr[i]);
                set.add(parseInt);
            } catch (NumberFormatException e) {
                set.add(defaultVal);
                continue;
            }
        }
        return set;
    }

    public static Set<Integer> splitConverToIntSet(String str, String split) {
        return splitConverToIntSet(str, split, 0);
    }

    public static List<Integer> splitConverToIntList(String str, String split) {
        return splitConverToIntList(str, split, 0);
    }

    public static int[] splitConvertToIntArray(String str, String split, int defaultVal) {
        if (isEmpty(str)) {
            return new int[0];
        }
        String[] strArr = str.split(split);
        int[] result = new int[strArr.length];
        for (int i = 0; i < strArr.length; i++) {
            try {
                result[i] = Integer.parseInt(strArr[i]);
            } catch (NumberFormatException e) {
                result[i] = defaultVal;
                continue;
            }
        }
        return result;
    }

    public static int[] splitConvertToIntArray(String str, String split) {
        return splitConvertToIntArray(str, split, 0);
    }

    // ===============split 2 Long=======================

    public static List<Long> splitConverToLongList(String str, String split, long defaultVal) {
        if (isEmpty(str)) {
            return new ArrayList<Long>();
        }
        String[] strArr = str.split(split);
        List<Long> list = new ArrayList<Long>(strArr.length);
        for (int i = 0; i < strArr.length; i++) {
            try {
                long parseLong = Long.parseLong(strArr[i]);
                list.add(parseLong);
            } catch (NumberFormatException e) {
                list.add(defaultVal);
                continue;
            }
        }
        return list;
    }

    public static List<Long> splitConverToLongList(String str, String split) {
        return splitConverToLongList(str, split, 0L);
    }

    public static long[] splitConvertToLongArray(String str, String split, long defaultVal) {
        if (isEmpty(str)) {
            return new long[0];
        }
        String[] strArr = str.split(split);
        long[] result = new long[strArr.length];
        for (int i = 0; i < strArr.length; i++) {
            try {
                result[i] = Long.parseLong(strArr[i]);
            } catch (NumberFormatException e) {
                result[i] = defaultVal;
                continue;
            }
        }
        return result;
    }

    public static long[] splitConvertToLongArray(String str, String split) {
        return splitConvertToLongArray(str, split, 0L);
    }

    // ===============split convert byte=======================

    public static List<Byte> splitConverToByteList(String str, String split, byte defaultVal) {
        if (isEmpty(str)) {
            return new ArrayList<Byte>();
        }
        String[] strArr = str.split(split);
        List<Byte> list = new ArrayList<Byte>(strArr.length);
        for (int i = 0; i < strArr.length; i++) {
            try {
                byte parseByte = Byte.parseByte(strArr[i]);
                list.add(parseByte);
            } catch (NumberFormatException e) {
                list.add(defaultVal);
                continue;
            }
        }
        return list;
    }

    public static List<Byte> splitConverToByteList(String str, String split) {
        return splitConverToByteList(str, split, (byte) 0);
    }

    public static byte[] splitConvertToByteArray(String str, String split, byte defaultVal) {
        if (isEmpty(str)) {
            return new byte[0];
        }
        String[] strArr = str.split(split);
        byte[] result = new byte[strArr.length];
        for (int i = 0; i < strArr.length; i++) {
            try {
                result[i] = Byte.parseByte(strArr[i]);
            } catch (NumberFormatException e) {
                result[i] = defaultVal;
                continue;
            }
        }
        return result;
    }

    public static byte[] splitConvertToByteArray(String str, String split) {
        return splitConvertToByteArray(str, split, (byte) 0);
    }

    // ===============split convert double=======================

    public static List<Double> splitConverToDoubleList(String str, String split, double defaultVal) {
        if (isEmpty(str)) {
            return new ArrayList<Double>();
        }
        String[] strArr = str.split(split);
        List<Double> list = new ArrayList<Double>(strArr.length);
        for (int i = 0; i < strArr.length; i++) {
            try {
                double parseByte = Double.parseDouble(strArr[i]);
                list.add(parseByte);
            } catch (NumberFormatException e) {
                list.add(defaultVal);
                continue;
            }
        }
        return list;
    }

    public static List<Double> splitConverToDoubleList(String str, String split) {
        return splitConverToDoubleList(str, split, 0);
    }

    public static double[] splitConvertToDoubleArray(String str, String split, double defaultVal) {
        if (isEmpty(str)) {
            return new double[0];
        }
        String[] strArr = str.split(split);
        double[] result = new double[strArr.length];
        for (int i = 0; i < strArr.length; i++) {
            try {
                result[i] = Double.parseDouble(strArr[i]);
            } catch (NumberFormatException e) {
                result[i] = defaultVal;
                continue;
            }
        }
        return result;
    }

    public static double[] splitConvertToDoubleArray(String str, String split) {
        return splitConvertToDoubleArray(str, split, 0);
    }

    // ===============solit convert float=======================

    public static List<Float> splitConverToFloatList(String str, String split, float defaultVal) {
        if (isEmpty(str)) {
            return new ArrayList<Float>();
        }
        String[] strArr = str.split(split);
        List<Float> list = new ArrayList<Float>(strArr.length);
        for (int i = 0; i < strArr.length; i++) {
            try {
                float parseByte = Float.parseFloat(strArr[i]);
                list.add(parseByte);
            } catch (NumberFormatException e) {
                list.add(defaultVal);
                continue;
            }
        }
        return list;
    }

    public static List<Float> splitConverToFloatList(String str, String split) {
        return splitConverToFloatList(str, split, 0f);
    }

    public static float[] splitConvertToFloatArray(String str, String split, float defaultVal) {
        if (isEmpty(str)) {
            return new float[0];
        }
        String[] strArr = str.split(split);
        float[] result = new float[strArr.length];
        for (int i = 0; i < strArr.length; i++) {
            try {
                result[i] = Float.parseFloat(strArr[i]);
            } catch (NumberFormatException e) {
                result[i] = defaultVal;
                continue;
            }
        }
        return result;
    }

    public static float[] splitConvertToFloatArray(String str, String split) {
        return splitConvertToFloatArray(str, split, 0f);
    }

    // ===============upperCase=======================

    /**
     * 将首字母大写
     *
     * @param str
     * @return
     */
    public static String upperCaseFirstChar(String str) {
        if (str == null || str.isEmpty()) {
            return str;
        }
        char firstChar = str.charAt(0);
        if (Character.isUpperCase(firstChar)) {
            return str;
        }
        char[] values = str.toCharArray();
        values[0] = Character.toUpperCase(firstChar);
        return new String(values);
    }

}

4.编写controller

package com.lzl.controller;

import com.lzl.service.OnlinePreviewService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletResponse;

@RestController
public class OnlinePreviewController {

    @Autowired
    private OnlinePreviewService onlinePreviewService;

    @GetMapping("/onlinePreview")
    public void onlinePreview(@RequestParam("url") String url, HttpServletResponse response) throws Exception{
        onlinePreviewService.onlinePreview(url,response);
    }
}

5.编写serivce和service实现类

package com.lzl.service;

import javax.servlet.http.HttpServletResponse;

public interface OnlinePreviewService {

    void onlinePreview(String url, HttpServletResponse response) throws Exception;
}

package com.lzl.service.impl;

import com.lzl.service.OnlinePreviewService;
import com.lzl.util.FileConvertUtil;
import com.lzl.util.SmartStringUtil;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.io.OutputStream;

@Service
public class OnlinePreviewServiceImpl implements OnlinePreviewService {

    @Override
    public void onlinePreview(String url, HttpServletResponse response) throws Exception {
        //获取文件类型
        String[] str = SmartStringUtil.split(url, "\\.");

        if (str.length == 0) {
            throw new Exception("文件格式不正确");
        }
        String suffix = str[str.length - 1];
        if (!suffix.equals("txt") && !suffix.equals("doc") && !suffix.equals("docx") && !suffix.equals("xls")
                && !suffix.equals("xlsx") && !suffix.equals("ppt") && !suffix.equals("pptx")) {
            throw new Exception("文件格式不支持预览");
        }
        InputStream in = FileConvertUtil.convertLocaleFile(url, suffix);
        OutputStream outputStream = response.getOutputStream();
        //创建存放文件内容的数组
        byte[] buff = new byte[1024];
        //所读取的内容使用n来接收
        int n;
        //当没有读取完时,继续读取,循环
        while ((n = in.read(buff)) != -1) {
            //将字节数组的数据全部写入到输出流中
            outputStream.write(buff, 0, n);
        }
        //强制将缓存区的数据进行输出
        outputStream.flush();
        //关流
        outputStream.close();
        in.close();
    }
}

三 测试

启动项目测试

报错

java.lang.IllegalArgumentException: inputFormat is null
	at com.artofsolving.jodconverter.openoffice.converter.AbstractOpenOfficeDocumentConverter.ensureNotNull(AbstractOpenOfficeDocumentConverter.java:113) ~[jodconverter-2.2.1.jar:na]
	at com.artofsolving.jodconverter.openoffice.converter.AbstractOpenOfficeDocumentConverter.convert(AbstractOpenOfficeDocumentConverter.java:79) ~[jodconverter-2.2.1.jar:na]
	at com.lzl.util.FileConvertUtil.covertCommonByStream(FileConvertUtil.java:77) ~[classes/:na]
	at com.lzl.util.FileConvertUtil.convertLocaleFile(FileConvertUtil.java:38) ~[classes/:na]

原因是jodconverter 2.2.1 版本不支持docx、xlsx、pptx 转换成PDF格式异常

解决办法：

新建​​com.artofsolving.jodconverter​​​包重写​​BasicDocumentFormatRegistry​​类

package com.artofsolving.jodconverter​​​;

import com.artofsolving.jodconverter.DocumentFormat;
import com.artofsolving.jodconverter.DocumentFormatRegistry;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 *
 * @description: 重写 BasicDocumentFormatRegistry 文档格式
 *
 */
public class BasicDocumentFormatRegistry implements DocumentFormatRegistry {

    private List/* <DocumentFormat> */ documentFormats = new ArrayList();

    public void addDocumentFormat(DocumentFormat documentFormat) {
        documentFormats.add(documentFormat);
    }

    protected List/* <DocumentFormat> */ getDocumentFormats() {
        return documentFormats;
    }


    @Override
    public DocumentFormat getFormatByFileExtension(String extension) {
        if (extension == null) {
            return null;
        }

        //将文件名后缀统一转化
        if (extension.indexOf("doc") >= 0) {
            extension = "doc";
        }
        if (extension.indexOf("ppt") >= 0) {
            extension = "ppt";
        }
        if (extension.indexOf("xls") >= 0) {
            extension = "xls";
        }
        String lowerExtension = extension.toLowerCase();
        for (Iterator it = documentFormats.iterator(); it.hasNext(); ) {
            DocumentFormat format = (DocumentFormat) it.next();
            if (format.getFileExtension().equals(lowerExtension)) {
                return format;
            }
        }
        return null;
    }

    @Override
    public DocumentFormat getFormatByMimeType(String mimeType) {
        for (Iterator it = documentFormats.iterator(); it.hasNext(); ) {
            DocumentFormat format = (DocumentFormat) it.next();
            if (format.getMimeType().equals(mimeType)) {
                return format;
            }
        }
        return null;
    }
}

重新启动项目 测试：