根据word模板生成word、转换成pdf、打成war包

一、word模板

二、替换模板里的内容（创建一个WordUtils工具类）

import org.apache.poi.xwpf.usermodel.*;

import java.io.*;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class WordUtils {
    /**
     * 替换表格里面的变量
     * @param doc  要替换的文档
     * @param params 参数
     */
    public static void replaceInTable(XWPFDocument doc, Map<String, Object> params) {
        Iterator<XWPFTable> iterator = doc.getTablesIterator();
        XWPFTable table;
        List<XWPFTableRow> rows;
        List<XWPFTableCell> cells;
        List<XWPFParagraph> paragraphs = doc.getParagraphs();
        for (XWPFParagraph paragraph : paragraphs) {
            List<XWPFRun> runs = paragraph.getRuns();
            for (XWPFRun run : runs) {
               run.setText(changeValue(run.toString(), params),0);
            }
        }
        while (iterator.hasNext()) {
            table = iterator.next();
            rows = table.getRows();

　　　　　　// 删除行
　　　　　　//table.removeRow(3);

            for (XWPFTableRow row : rows) {
                cells = row.getTableCells();
                for (XWPFTableCell cell : cells) {
                    List<XWPFParagraph> paras = cell.getParagraphs();
                     for (XWPFParagraph paragraph : paras) {
                         List<XWPFRun> runs = paragraph.getRuns();
                        for (XWPFRun run : runs) {
                             run.setText(changeValue(run.toString(), params),0);
                           }
                     }
                }
            }

　　　　mergeCellsVertically(table, 0, 1,2);
　　　　mergeCellsVertically(table, 3, 1,2);

        }
    }

     /**
      * 匹配传入信息集合与模板
      * @param value 模板需要替换的区域
     * @param textMap 传入信息集合
     * @return 模板需要替换区域信息集合对应值
     */
      private static String changeValue(String value, Map<String, Object> textMap){
        Set<Map.Entry<String, Object>> textSets = textMap.entrySet();
        for (Map.Entry<String, Object> textSet : textSets) {
            //匹配模板与替换值 格式${key}
             String key = "${"+textSet.getKey()+"}";
            if(value.indexOf(key)!= -1){
                value = textSet.getValue().toString();
            }
        }
         return value;
      }

    /**
     * 关闭输入流
     * @param is
     */
    public static void close(InputStream is) {
        if (is != null) {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * 关闭输出流
     * @param os
     */
    public static void close(OutputStream os) {
        if (os != null) {
            try {
                os.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }


}

三、实现类   reportService

/**   convertPath路径D:/template/convert   

Map<String, Object> params       例：params.put("name", "张三")；   // 与模板里设置的变量一致

**/

private ResponseEntity<byte[]> templateWrite(String filePath, Map<String, Object> params, int n) throws IOException {

         String convertPath = path + File.separator + "template" + File.separator + "convert";

    File dir = new File(convertPath);
    if (!dir.exists()) {
        dir.mkdir();
    }
    String docxFilePath = convertPath + File.separator + "tb" + n + ".docx";
    String pdfFilePath = convertPath + File.separator + "pdf" + File.separator + "tb" + n + ".pdf";
    InputStream is = new FileInputStream(filePath);
    XWPFDocument doc = new XWPFDocument(is);
    // 替换表格里面的变量
    WordUtils.replaceInTable(doc, params);

    OutputStream os = new FileOutputStream(docxFilePath);
    doc.write(os);
    WordUtils.close(os);
    WordUtils.close(is);
    os.flush();
    os.close();

    return this.convertToPdf(docxFilePath, pdfFilePath);
}

private ResponseEntity<byte[]> convertToPdf(String docxFilePath, String pdfFilePath) throws IOException {
    // word转pdf
    String targetPath = path + File.separator + "template" + File.separator + "convert" + File.separator + "pdf";
    LibreofficeUtils.wordConverterToPdf(docxFilePath, targetPath, osName);

    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_PDF);
    headers.setContentDispositionFormData("attachment", "tb.pdf");
　　//输入docx

   //headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
   //headers.setContentDispositionFormData("attachment", "tb.docx");

    ResponseEntity<byte[]> returnFile = new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(new File(pdfFilePath)), headers, HttpStatus.OK);

    deleteFile(new File(path + File.separator + "template" + File.separator + "convert" ));

    return returnFile;
}

 四、controller类

@RequestMapping(value = "/download-pdf", method = RequestMethod.GET)
public ResponseEntity<byte[]> downloadPDF(HttpServletResponse response, ExamReportDTO examReport) throws Exception {
    return reportService.exportPDF(response, examReport);
}

 五、pom.xml    （第一次word转Pdf用的是poi，4.1.2版本太高，所以转换报错，需要降低版本）

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <!--<version>4.1.2</version>-->
    <version>3.12</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <!--<version>4.1.2</version>-->
    <version>3.12</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml-schemas</artifactId>
   <!-- <version>4.1.2</version>-->
    <version>3.12</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-scratchpad</artifactId>
    <!--<version>4.1.2</version>-->
    <version>3.12</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.apache.xmlbeans/xmlbeans -->
<dependency>
    <groupId>org.apache.xmlbeans</groupId>
    <artifactId>xmlbeans</artifactId>
    <version>3.1.0</version>
</dependency>

<dependency>
    <groupId>fr.opensagres.xdocreport</groupId>
    <artifactId>org.apache.poi.xwpf.converter.pdf</artifactId>
    <version>1.0.6</version>
</dependency>

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.11</version>
</dependency>

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itext-asian</artifactId>
    <version>5.2.0</version>
</dependency>

<dependency>
    <groupId>fr.opensagres.xdocreport</groupId>
    <artifactId>org.odftoolkit.odfdom.converter.pdf</artifactId>
    <version>1.0.6</version>
</dependency>

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.4</version>
</dependency>

 六、最终实现此需求经历的过程

1、先使用的itext，根据pdf模板，填写区域值，直接生成pdf文件，无需转换。

难点：需要安装Adobe Acrobat DC，按照如下步骤，设计表单的域值。

Pdf模板准备好后，可以自行百度，查询itext如何根据pdf模板，填充内容

结果：最终没有选择这个方式，主要是因为，生成的pdf时，域值框，背景色是蓝色，没有多余时间研究如何变成白色，所以放弃了。

 

 

 2、使用poi   实现word转换pdf 

service类     

InputStream docxInputStream = new FileInputStream(docxFilePath);
XWPFDocument document = new XWPFDocument(docxInputStream);
OutputStream out = new FileOutputStream(pdfFilePath);

PdfOptions options = PdfOptions.create();
document.createNumbering();
PdfConverter.getInstance().convert(document, out, options);   // 需要注意，此类只能用低版本的Poi，所以把原来的4.1.2版本降为了3.12
docxInputStream.close();
out.close();

结果：此方式有不足，word有复选框或者和合并单元格这种复杂样式时，转换后的Pdf格式错乱，所以放弃此方法

3、使用libreoffice

需要安装liberoffice ，并配置path环境变量   

安装完后，可以从过cmd，来测试是否可行

 pdf 包路径     .docx文件路径   

 1）创建LibreofficeUtils工具类 

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;

public class LibreofficeUtils {

    public static boolean wordConverterToPdf(String docxPath,String targetPath, String osName) throws IOException {
        File file = new File(docxPath);
        try {
            String command = "";
            if (osName.contains("Windows")) {
                command = "soffice --convert-to pdf  -outdir " + targetPath + " " + docxPath;
            } else {
                command = "doc2pdf --output=" + targetPath + File.separator + file.getName().replaceAll(".(?i)docx", ".pdf") + " " + docxPath;
            }
            String result = executeCommand(command);
            if (result.equals("") || result.contains("writer_pdf_Export")) {
                return true;
            }
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
        return false;
    }

    private static String executeCommand(String command) {
        StringBuffer output = new StringBuffer();
        Process p;
        InputStreamReader inputStreamReader = null;
        BufferedReader reader = null;
        try {
            p = Runtime.getRuntime().exec(command);
            p.waitFor();
            inputStreamReader = new InputStreamReader(p.getInputStream(), "UTF-8");
            reader = new BufferedReader(inputStreamReader);
            String line = "";
            while ((line = reader.readLine()) != null) {
                output.append(line + "
");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            try {
                if (reader != null) {
                    reader.close();
                }
                if (inputStreamReader != null) {
                    inputStreamReader.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        System.out.println(output.toString());
        return output.toString();
    }
}

2） service 类

 // word转pdf
    String targetPath = path + File.separator + "template" + File.separator + "convert" + File.separator + "pdf";
    LibreofficeUtils.wordConverterToPdf(docxFilePath, targetPath, osName);

3）用到的jar包

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.4</version>
</dependency>

结果：经过多种方法尝试，此方法可行


七、补充下，把pdf打成zip包代码实现

service实现类：

    /**
     * 多文件打成zip包
     *
     * @param path   如：D:
     */
    private void pdfToZip(String path) {
//        String convertPath = path + File.separator + "template" + File.separator + "convert" + File.separator + "pdf";
        String convertPath = path + File.separator + "template" + File.separator + "convert";
        File dir = new File(convertPath);
        if (dir.isDirectory()) {
            List<File> file = new ArrayList<>();
            File[] files = dir.listFiles();
            File zipFile = new File(convertPath + File.separator + "tianbao.zip");
            for (int i = 0; i < files.length; i++) {
                File f = files[i];
                String fileName = f.getName();
                String suffix = fileName.substring(fileName.lastIndexOf("."));
//                if (suffix.equals(".pdf")) {
                if (suffix.equals(".docx")) {
                    file.add(f);
                }
            }
            ZipUtils.toZip(file, zipFile);
        }
    }

// 打包完zip后，输出

String convertPath = path + File.separator + "template" + File.separator + "convert";
//            String zipPath = convertPath + File.separator + "pdf" + File.separator;
            String zipPath = convertPath + File.separator;
            HttpHeaders headers = new HttpHeaders();
            headers.setContentDispositionFormData("attachment", "tb.zip");
            ResponseEntity<byte[]> returnFile = new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(new File(zipPath + "tb.zip")), headers, HttpStatus.OK);
　　　　　　　　// 删除文件
            deleteFile(new File(convertPath));
　　　　　　retrun  returnFile;

private void deleteFile(File file) {
    if (file.isDirectory()) {
        File[] files = file.listFiles();
        for (int i = 0; i < files.length; i++) {
            deleteFile(files[i]);
        }
    }
    file.delete();
}

import org.springframework.boot.container.core.log.ZKLogger;
import org.springframework.boot.container.core.log.ZKLoggerFactory;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipUtils {
    private static final ZKLogger logger = ZKLoggerFactory.getLogger(ZipUtils.class);

    /**
     * 把文件集合打成zip压缩包
     * @param srcFiles 压缩文件集合
     * @param zipFile  zip文件名
     * @throws RuntimeException 异常
     */
    public static void toZip(List<File> srcFiles, File zipFile) throws RuntimeException {
        long start = System.currentTimeMillis();
        if(zipFile == null){
            logger.error("压缩包文件名为空！");
            return;
        }
        if(!zipFile.getName().endsWith(".zip")){
            logger.error("压缩包文件名异常，zipFile={}", zipFile.getPath());
            return;
        }
        ZipOutputStream zos = null;
        FileOutputStream out = null;
        try {
            out = new FileOutputStream(zipFile);
            zos = new ZipOutputStream(out);
            for (File srcFile : srcFiles) {
                byte[] buf = new byte[10*1024];
                zos.putNextEntry(new ZipEntry(srcFile.getName()));
                int len;
                FileInputStream in = new FileInputStream(srcFile);
                while ((len = in.read(buf)) != -1) {
                    zos.write(buf, 0, len);
                }
                //zos.setComment("我是注释");
                in.close();
            }
            zos.closeEntry();
            long end = System.currentTimeMillis();
            logger.info("压缩完成，耗时：" + (end - start) + " ms");
        } catch (Exception e) {
            logger.error("ZipUtil toZip exception, ", e);
            throw new RuntimeException("zipFile error from ZipUtils", e);
        } finally {
            if (zos != null) {
                try {
                    zos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}


由于需求变更，WordUtils里添加合并单元格功能：

/**
 * word跨行并单元格
 * @param table 表格
 * @param col 合并行所在列
 * @param fromRow 开始行
 * @param toRow 结束行
 */
public static void mergeCellsVertically(XWPFTable table, int col, int fromRow, int toRow) {
    for (int rowIndex = fromRow; rowIndex <= toRow; rowIndex++) {
        XWPFTableCell cell = table.getRow(rowIndex).getCell(col);
        if ( rowIndex == fromRow ) {
            cell.getCTTc().addNewTcPr().addNewVMerge().setVal(STMerge.RESTART);
        } else {
            cell.getCTTc().addNewTcPr().addNewVMerge().setVal(STMerge.CONTINUE);
        }
    }
}