poi实现多级标题结构

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigInteger;

import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;
import org.apache.poi.xwpf.usermodel.XWPFStyle;
import org.apache.poi.xwpf.usermodel.XWPFStyles;
import org.apache.xmlbeans.XmlException;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTDecimalNumber;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTOnOff;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTPPr;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTString;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTStyle;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTStyles;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.STStyleType;

public class WordTitle {
    /**
     * word整体样式
     */
    private static CTStyles wordStyles = null;

    /**
     * Word整体样式
     */
    static {
        XWPFDocument template;
        try {
            // 读取模板文档
            template = new XWPFDocument(new FileInputStream("D:/format.docx"));
            // 获得模板文档的整体样式
            wordStyles = template.getStyle();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (XmlException e) {
            e.printStackTrace();
        }
    }

    // 模板方式实现
    public static void formatDoc() throws IOException {
        // 新建的word文档对象
        XWPFDocument doc = new XWPFDocument();
        // 获取新建文档对象的样式
        XWPFStyles newStyles = doc.createStyles();
        // 关键行// 修改设置文档样式为静态块中读取到的样式
        newStyles.setStyles(wordStyles);

        // 开始内容输入
        // 标题1，1级大纲
        XWPFParagraph para1 = doc.createParagraph();
        // 关键行// 1级大纲
        para1.setStyle("1");
        XWPFRun run1 = para1.createRun();
        // 标题内容
        run1.setText("标题 1");

        // 标题2
        XWPFParagraph para2 = doc.createParagraph();
        // 关键行// 2级大纲
        para2.setStyle("2");
        XWPFRun run2 = para2.createRun();
        // 标题内容
        run2.setText("标题 2");

        // 正文
        XWPFParagraph paraX = doc.createParagraph();
        XWPFRun runX = paraX.createRun();
        // 正文内容
        runX.setText("正文");

        // word写入到文件
        FileOutputStream fos = new FileOutputStream("D:/myDoc.docx");
        doc.write(fos);
        fos.close();
    }

    // main
    public static void main(String[] args) throws Exception {
        // 读取模板方式写word
        formatDoc();

        // 自定义样式方式写word
        writeSimpleDocxFile();
    }

    /**
     * 自定义样式方式写word，参考statckoverflow的源码
     *
     * @throws IOException
     */
    public static void writeSimpleDocxFile() throws IOException {
        XWPFDocument docxDocument = new XWPFDocument();

        // 老外自定义了一个名字，中文版的最好还是按照word给的标题名来，否则级别上可能会乱
        addCustomHeadingStyle(docxDocument, "标题 1", 1);
        addCustomHeadingStyle(docxDocument, "标题 2", 2);

        // 标题1
        XWPFParagraph paragraph = docxDocument.createParagraph();
        XWPFRun run = paragraph.createRun();
        run.setText("标题 1");
        paragraph.setStyle("标题 1");

        // 标题2
        XWPFParagraph paragraph2 = docxDocument.createParagraph();
        XWPFRun run2 = paragraph2.createRun();
        run2.setText("标题 2");
        paragraph2.setStyle("标题 2");

        // 正文
        XWPFParagraph paragraphX = docxDocument.createParagraph();
        XWPFRun runX = paragraphX.createRun();
        runX.setText("正文");

        // word写入到文件
        FileOutputStream fos = new FileOutputStream("D:/myDoc2.docx");
        docxDocument.write(fos);
        fos.close();
    }

    /**
     * 增加自定义标题样式。这里用的是stackoverflow的源码
     *
     * @param docxDocument 目标文档
     * @param strStyleId 样式名称
     * @param headingLevel 样式级别
     */
    private static void addCustomHeadingStyle(XWPFDocument docxDocument, String strStyleId, int headingLevel) {

        CTStyle ctStyle = CTStyle.Factory.newInstance();
        ctStyle.setStyleId(strStyleId);

        CTString styleName = CTString.Factory.newInstance();
        styleName.setVal(strStyleId);
        ctStyle.setName(styleName);

        CTDecimalNumber indentNumber = CTDecimalNumber.Factory.newInstance();
        indentNumber.setVal(BigInteger.valueOf(headingLevel));

        // lower number > style is more prominent in the formats bar
        ctStyle.setUiPriority(indentNumber);

        CTOnOff onoffnull = CTOnOff.Factory.newInstance();
        ctStyle.setUnhideWhenUsed(onoffnull);

        // style shows up in the formats bar
        ctStyle.setQFormat(onoffnull);

        // style defines a heading of the given level
        CTPPr ppr = CTPPr.Factory.newInstance();
        ppr.setOutlineLvl(indentNumber);
        ctStyle.setPPr(ppr);

        XWPFStyle style = new XWPFStyle(ctStyle);

        // is a null op if already defined
        XWPFStyles styles = docxDocument.createStyles();

        style.setType(STStyleType.PARAGRAPH);
        styles.addStyle(style);

    }
}[color=blue][/color]