使用 Docx4j 操作word,并替换word中的占位符，使用Java编写代码

好的，下面是使用 Docx4j 操作 Word 并替换占位符的 Java 代码示例：

import java.io.File;
import java.util.HashMap;

import javax.xml.bind.JAXBElement;

import org.docx4j.dml.wordprocessingDrawing.Inline;
import org.docx4j.jaxb.Context;
import org.docx4j.model.fields.merge.MailMerger;
import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
import org.docx4j.openpackaging.parts.WordprocessingML.MainDocumentPart;
import org.docx4j.wml.ContentAccessor;
import org.docx4j.wml.Document;
import org.docx4j.wml.Drawing;
import org.docx4j.wml.R;
import org.docx4j.wml.Text;

public class Docx4jDemo {

    public static void main(String[] args) throws Exception {
        // 加载模板文件
        File file = new File("template.docx");
        WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(file);

        // 获取文档主体部分
        MainDocumentPart documentPart = wordMLPackage.getMainDocumentPart();
        Document document = documentPart.getContents();

        // 定义要替换的占位符和对应的值
        HashMap<String, String> mappings = new HashMap<String, String>();
        mappings.put("name", "张三");
        mappings.put("age", "30");
        mappings.put("gender", "男");

        // 替换占位符
        MailMerger.performReplacements(document, mappings);

        // 处理含有图片的占位符
        List<Object> paragraphs = document.getBody().getContent();
        for (Object paragraph : paragraphs) {
            List<Object> runs = getAllElementFromObject(paragraph, R.class);
            for (Object run : runs) {
                List<Object> texts = getAllElementFromObject(run, Text.class);
                for (Object text : texts) {
                    String value = ((Text) text).getValue();

                    if (value.contains("{{image")) {
                        // 获取图片名称
                        String imageName = value.substring(value.indexOf("{{image=") + 8, value.indexOf("}}"));
                        // 获取图片文件
                        File imageFile = new File(imageName);
                        byte[] imageBytes = FileUtils.readFileToByteArray(imageFile);

                        // 创建图片对象
                        BinaryPartAbstractImage imagePart = BinaryPartAbstractImage.createImagePart(wordMLPackage, imageBytes);
                        Inline inline = imagePart.createImageInline(null, null, 0, 1, false, 800, 600, 1);

                        // 替换占位符
                        Object parent = run;
                        List<Object> siblings = getAllElementFromObject(parent, Drawing.class);
                        int index = siblings.indexOf(run);
                        siblings.add(index + 1, inline);
                        ((ContentAccessor) parent).getContent().remove(run);
                    }
                }
            }
        }

        // 保存修改后的文档
        wordMLPackage.save(new File("output.docx"));
    }

    /**
     * 递归获取指定类型的元素列表
     * @param obj
     * @param toSearch
     * @return
     */
    public static List<Object> getAllElementFromObject(Object obj, Class<?> toSearch) {
        List<Object> result = new ArrayList<Object>();
        if (obj instanceof JAXBElement) obj = ((JAXBElement<?>) obj).getValue();

        if (obj.getClass().equals(toSearch)) {
            result.add(obj);
        } else if (obj instanceof ContentAccessor) {
            List<?> children = ((ContentAccessor) obj).getContent();
            for (Object child : children) {
                result.addAll(getAllElementFromObject(child, toSearch));
            }

        }
        return result;
    }

}

代码中首先加载 Word 模板文件，然后获取文档主体部分，定义要替换的占位符和对应的值，使用 MailMerger.performReplacements 方法替换占位符，最后处理含有图片的占位符，并保存修改后的文档。