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);

}
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