java - Apache Poi for Word - 使用 TextAlignment 创建自定义样式

Question

    private static void applyTextAlign(XWPFStyle style, TextAlignment value) {
        // Steps here
    }

如何将文本对齐(任何类型，如 TextAlignment.CENTER)应用于传递给此函数输入的样式对象？我一直无法找到这方面的正确教程和示例。

        CTPPr ppr = style.getCTStyle().addNewPPr();
        CTTextAlignment textAlignment = ppr.addNewTextAlignment();
        STTextAlignment.Enum en = STTextAlignment.Enum.forInt(value.ordinal());
        textAlignment.setVal(en);

我尝试了类似上面的方法，但自然它是不正确的，甚至在 docx 上会损坏。我在这里找到的其他示例将文本对齐方式直接应用于段落，但我需要文本对齐方式成为样式的一部分，以便可以为任何元素提供它，无论是段落还是其他元素。

Answer 1

使用低级别CT*类并不那么简单。这些类是从 XML 自动创建的架构。他们什么都不考虑。所以不能简单地添加一个新的 PPr到风格。如果已经有一个怎么办？它不能有两个，因为这会导致文件损坏。必须检查是否已经存在 PPr仅当没有时，才添加一个新的。 TextAlignment 相同在 PPr那么。

但是，由于XWPF的实验状态，当然还有更多问题。在apache poi 。例如XWPFStyle到目前为止，大部分内容仅供阅读。到目前为止，还没有太多的二传手。当使用CTStyle时人们需要检查是否真的存储了对此的更改。例如java.util.List<XWPFStyle>的XWPFStyles似乎失去了与单例CTStyle的联系XWPFStyle 的 s就在里面。所以我不得不利用反射来想办法改变 CTStyle以便存储更改。

哦，当然，我们不能确定ST* 的序数。枚举与 apache poi 之一相同枚举。那太简单了，不是吗？

以下代码适用于我使用当前 apache poi 4.1.2 :

import java.io.*;

import org.apache.poi.xwpf.usermodel.*;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.*;
import java.lang.reflect.Field;

public class CreateWordTextAlingmentStyles {

 private static XWPFStyle createNamedStyle(XWPFStyles styles, STStyleType.Enum styleType, String styleId) {
  if (styles == null || styleId == null) return null;
  XWPFStyle style = styles.getStyle(styleId);
  if (style == null) {
   CTStyle ctStyle = CTStyle.Factory.newInstance();
   ctStyle.addNewName().setVal(styleId);
   ctStyle.setCustomStyle(STOnOff.TRUE);
   style = new XWPFStyle(ctStyle, styles);
   style.setType(styleType);
   style.setStyleId(styleId);
   styles.addStyle(style);
  }
  return style;
 }

 private static void applyTextAlignment(XWPFStyle style, TextAlignment value) throws Exception {
  if (style == null || value == null) return;

  Field _ctStyles = XWPFStyles.class.getDeclaredField("ctStyles");
  _ctStyles.setAccessible(true);
  CTStyles ctStyles = (CTStyles)_ctStyles.get(style.getStyles());

  for (CTStyle ctStyle : ctStyles.getStyleList()) {
   if (ctStyle.getStyleId().equals(style.getStyleId())) {
    CTPPr ppr = ctStyle.getPPr(); 
    if (ppr == null) ppr = ctStyle.addNewPPr();
    CTTextAlignment ctTextAlignment = ppr.getTextAlignment(); 
    if (ctTextAlignment == null) ctTextAlignment = ppr.addNewTextAlignment();
    if (value == TextAlignment.AUTO) {
     ctTextAlignment.setVal(STTextAlignment.AUTO);
    } else if (value == TextAlignment.BASELINE) {
     ctTextAlignment.setVal(STTextAlignment.BASELINE);
    } else if (value == TextAlignment.BOTTOM) {
     ctTextAlignment.setVal(STTextAlignment.BOTTOM);
    } else if (value == TextAlignment.CENTER) {
     ctTextAlignment.setVal(STTextAlignment.CENTER);
    } else if (value == TextAlignment.TOP) {
     ctTextAlignment.setVal(STTextAlignment.TOP);
    }
    style.setStyle(ctStyle);
   }
  }
 }

 private static void applyJustification(XWPFStyle style, ParagraphAlignment value) throws Exception {
  if (style == null || value == null) return;

  Field _ctStyles = XWPFStyles.class.getDeclaredField("ctStyles");
  _ctStyles.setAccessible(true);
  CTStyles ctStyles = (CTStyles)_ctStyles.get(style.getStyles());

  for (CTStyle ctStyle : ctStyles.getStyleList()) {
   if (ctStyle.getStyleId().equals(style.getStyleId())) {
    CTPPr ppr = ctStyle.getPPr(); if (ppr == null) ppr = ctStyle.addNewPPr();
    CTJc jc = ppr.getJc(); if (jc == null) jc = ppr.addNewJc();
    if (value == ParagraphAlignment.BOTH) {
     jc.setVal(STJc.BOTH);
    } else if (value == ParagraphAlignment.CENTER) {
     jc.setVal(STJc.CENTER);
    } else if (value == ParagraphAlignment.DISTRIBUTE) {
     jc.setVal(STJc.DISTRIBUTE);
    } else if (value == ParagraphAlignment.HIGH_KASHIDA) {
     jc.setVal(STJc.HIGH_KASHIDA);
    } else if (value == ParagraphAlignment.LEFT) {
     jc.setVal(STJc.LEFT);
    } else if (value == ParagraphAlignment.LOW_KASHIDA) {
     jc.setVal(STJc.LOW_KASHIDA);
    } else if (value == ParagraphAlignment.MEDIUM_KASHIDA) {
     jc.setVal(STJc.MEDIUM_KASHIDA);
    } else if (value == ParagraphAlignment.NUM_TAB) {
     jc.setVal(STJc.NUM_TAB);
    } else if (value == ParagraphAlignment.RIGHT) {
     jc.setVal(STJc.RIGHT);
    } else if (value == ParagraphAlignment.THAI_DISTRIBUTE) {
     jc.setVal(STJc.THAI_DISTRIBUTE);
    }
    style.setStyle(ctStyle);
   }
  }
 }

 public static void main(String[] args) throws Exception {

  XWPFDocument document = new XWPFDocument();
  XWPFParagraph paragraph = null;
  XWPFRun run = null;

  XWPFStyles styles = document.createStyles();

  XWPFStyle style = createNamedStyle(styles, STStyleType.PARAGRAPH, "TextAlignmentAUTO");
  applyTextAlignment(style, TextAlignment.AUTO);
  paragraph = document.createParagraph();
  paragraph.setStyle(style.getStyleId());
  run = paragraph.createRun();
  run.setText("TextAlignment.AUTO");
  run.setFontSize(8);
  run = paragraph.createRun();
  run.setText("Bigger text");
  run.setFontSize(30);

  style = createNamedStyle(styles, STStyleType.PARAGRAPH, "TextAlignmentBASELINECentered");
  applyJustification(style, ParagraphAlignment.CENTER);
  applyTextAlignment(style, TextAlignment.BASELINE);
  paragraph = document.createParagraph();
  paragraph.setStyle(style.getStyleId());
  run = paragraph.createRun();
  run.setText("TextAlignment.BASELINE");
  run.setFontSize(8);
  run = paragraph.createRun();
  run.setText("Bigger text");
  run.setFontSize(30);

  style = createNamedStyle(styles, STStyleType.PARAGRAPH, "TextAlignmentBOTTOMRight");
  applyJustification(style, ParagraphAlignment.RIGHT);
  applyTextAlignment(style, TextAlignment.BOTTOM);
  paragraph = document.createParagraph();
  paragraph.setStyle(style.getStyleId());
  run = paragraph.createRun();
  run.setText("TextAlignment.BOTTOM");
  run.setFontSize(8);
  run = paragraph.createRun();
  run.setText("Bigger text");
  run.setFontSize(30);

  style = createNamedStyle(styles, STStyleType.PARAGRAPH, "TextAlignmentCENTERBoth");
  applyJustification(style, ParagraphAlignment.BOTH);
  applyTextAlignment(style, TextAlignment.CENTER);
  paragraph = document.createParagraph();
  paragraph.setStyle(style.getStyleId());
  run = paragraph.createRun();
  run.setText("TextAlignment.CENTER");
  run.setFontSize(8);
  run = paragraph.createRun();
  run.setText("Bigger text");
  run.setFontSize(30);

  style = createNamedStyle(styles, STStyleType.PARAGRAPH, "TextAlignmentTOPLeft");
  applyJustification(style, ParagraphAlignment.LEFT);
  applyTextAlignment(style, TextAlignment.TOP);
  paragraph = document.createParagraph();
  paragraph.setStyle(style.getStyleId());
  run = paragraph.createRun();
  run.setText("TextAlignment.TOP");
  run.setFontSize(8);
  run = paragraph.createRun();
  run.setText("Bigger text");
  run.setFontSize(30);

  FileOutputStream out = new FileOutputStream("./CreateWordTextAlingmentStyles.docx");
  document.write(out);
  out.close();
  document.close();

 }
}

它产生: