POI導出word

最近有一個項目需要用做導出word的功能，剛開始用的是poi，開始寫的時候才發現poi對於word的支持真的是少的可憐，還是推薦大家用xml或者別的來做導出word，本次功能分兩篇博客展現如果用需要用poi的可以看看這篇博客，歡迎補充。

1. 替換word表格參數
2. 動態生成行

根據word模板導出word

public class WordUtil {
 /**
 	* 這是一個工具類
     * 替換所有段落中的標記
     *
     * @param xwpfParagraphList
     * @param params
     */
    public static void replaceInAllParagraphs(List<XWPFParagraph> xwpfParagraphList, Map<String, String> params) {
        for (XWPFParagraph paragraph : xwpfParagraphList) {
            if (paragraph.getText() == null || paragraph.getText().equals("")) continue;
            for (String key : params.keySet()) {
                if (paragraph.getText().contains(key)) {
                    replaceInParagraph(paragraph, key, params.get(key));
                }
            }
        }
    }
 
    /**
     * 替換段落中的字符串
     *
     * @param xwpfParagraph
     * @param oldString
     * @param newString
     */
    public static void replaceInParagraph(XWPFParagraph xwpfParagraph, String oldString, String newString) {
        Map<String, Integer> pos_map = findSubRunPosInParagraph(xwpfParagraph, oldString);
        if (pos_map != null) {
            List<XWPFRun> runs = xwpfParagraph.getRuns();
            XWPFRun modelRun = runs.get(pos_map.get("end_pos"));
            XWPFRun xwpfRun = xwpfParagraph.insertNewRun(pos_map.get("end_pos") + 1);
            xwpfRun.setText(newString);
            if (modelRun.getFontSize() != -1)
                xwpfRun.setFontSize(modelRun.getFontSize());//默認值是五號字體,但五號字體getFontSize()時,返回-1
            xwpfRun.setFontFamily(modelRun.getFontFamily());
            for (int i = pos_map.get("end_pos"); i >= pos_map.get("start_pos"); i--) {
                xwpfParagraph.removeRun(i);
            }
        }
    }
 
    /**
     * 找到段落中子串的起始XWPFRun下標和終止XWPFRun的下標
     *
     * @param xwpfParagraph
     * @param substring
     * @return
     */
    public static Map<String, Integer> findSubRunPosInParagraph(XWPFParagraph xwpfParagraph, String substring) {
        List<XWPFRun> runs = xwpfParagraph.getRuns();
        int start_pos = 0;
        int end_pos = 0;
        String subtemp = "";
        for (int i = 0; i < runs.size(); i++) {
            subtemp = "";
            start_pos = i;
            for (int j = i; j < runs.size(); j++) {
                if (runs.get(j).getText(runs.get(j).getTextPosition()) == null) continue;
                subtemp += runs.get(j).getText(runs.get(j).getTextPosition());
                if (subtemp.equals(substring)) {
                    end_pos = j;
                    Map<String, Integer> map = new HashMap<>();
                    map.put("start_pos", start_pos);
                    map.put("end_pos", end_pos);
                    return map;
                }
            }
        }
        return null;
    }
 
    /**
     * 替換所有的表格
     *
     * @param xwpfTableList
     * @param params
     */
    public static void replaceInTables(List<XWPFTable> xwpfTableList, Map<String, String> params) {
        for (XWPFTable table : xwpfTableList) {
            replaceInTable(table, params);
        }
    }
 
    /**
     * 替換一個表格中的所有行
     *
     * @param xwpfTable
     * @param params
     */
    public static void replaceInTable(XWPFTable xwpfTable, Map<String, String> params) {
        List<XWPFTableRow> rows = xwpfTable.getRows();
        replaceInRows(rows, params);
    }
 
    /**
     * 替換表格中的一行
     *
     * @param rows
     * @param params
     */
    public static void replaceInRows(List<XWPFTableRow> rows, Map<String, String> params) {
        for (int i = 0; i < rows.size(); i++) {
            XWPFTableRow row = rows.get(i);
            replaceInCells(row.getTableCells(), params);
        }
    }
 
    /**
     * 替換一行中所有的單元格
     *
     * @param xwpfTableCellList
     * @param params
     */
    public static void replaceInCells(List<XWPFTableCell> xwpfTableCellList, Map<String, String> params) {
        for (XWPFTableCell cell : xwpfTableCellList) {
            replaceInCell(cell, params);
        }
    }
 
    /**
     * 替換表格中每一行中的每一個單元格中的所有段落
     *
     * @param cell
     * @param params
     */
    public static void replaceInCell(XWPFTableCell cell, Map<String, String> params) {
        List<XWPFParagraph> cellParagraphs = cell.getParagraphs();
        replaceInAllParagraphs(cellParagraphs, params);
     }
    }

下面是調用方法 因為map泛型規定了String，所以非String類型的參數都要用""串接起來

public static void main(String[] args) {
        Map<String, String> params = new HashMap<>();
        params.put("${name}", "請假");
        params.put("${user}", "鄒某");
        params.put("${time}", "" + new SimpleDateFormat("yyyy-MM-dd hh:mm").format(new Date()) + "");
        params.put("${type}", "產假");
        params.put("${project}", "金融");
        params.put("${startTime}", "2018-12-05 12:00");
        params.put("${endTime}", "2018-12-05 12:00");
        params.put("${dept}", "開發部");
        params.put("${numDay}", "1");
        params.put("${remark}", "不想上班");
        String filepath = "E:\\test.docx";
        String destpath = "E:\\test3.docx";
        WordUtil wordUtil = new WordUtil();
      WordUtil wordUtil = new WordUtil();
        try {
            OPCPackage pack = POIXMLDocument.openPackage(filepath);//讀取模板文件
            XWPFDocument document = new XWPFDocument(pack);//創建word文件並將模板導入
            //對段落中的標記進行替換
        	List<XWPFParagraph> parasList = xwpfDocument.getParagraphs();
        	replaceInAllParagraphs(parasList, map);
            //表格標記替換
            List<XWPFTable> tables = document.getTables();
            wordUtil.replaceInTables(tables, params);
            FileOutputStream  outStream = new FileOutputStream(destpath);
            document.write(outStream);
            outStream.flush();
            outStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

以上就是poi替換word模板參數的所有內容，歡迎補充