项目方案:Java创建Word生成隐藏文字

1. 简介

本项目旨在利用Java编程语言创建Word文档,并在文档中添加隐藏文字。隐藏文字是指在文档中无法直接看到的文字,可以通过特定的方式进行解密和查看。

2. 技术选型

  • 编程语言:Java
  • 文档处理库:Apache POI
  • 加密算法:AES(Advanced Encryption Standard)

3. 模块设计

本项目主要分为以下几个模块:

  • 文档创建模块:负责创建Word文档并设置基本样式
  • 隐藏文字加密模块:负责将隐藏文字进行加密并插入到Word文档中
  • 隐藏文字解密模块:负责从Word文档中提取隐藏文字并进行解密

4. 实现步骤

4.1 文档创建模块

首先,我们需要使用Apache POI库创建一个空的Word文档,并设置基本样式(如字体、字号、段落等)。

import org.apache.poi.xwpf.usermodel.*;

public class WordUtils {
    
    private XWPFDocument document;
    
    public WordUtils() {
        document = new XWPFDocument();
    }
    
    public void createDocument(String filePath) {
        try {
            FileOutputStream out = new FileOutputStream(filePath);
            document.write(out);
            out.close();
            System.out.println("Word文档创建成功!");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    public void setFont(String text, String fontFamily, int fontSize) {
        XWPFParagraph paragraph = document.createParagraph();
        XWPFRun run = paragraph.createRun();
        run.setText(text);
        run.setFontFamily(fontFamily);
        run.setFontSize(fontSize);
    }
    
    // ...其他设置样式的方法
    
}

4.2 隐藏文字加密模块

在隐藏文字加密模块中,我们需要使用AES算法对要隐藏的文字进行加密,并将加密后的文字插入到Word文档中。

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class AESUtils {

    private static final String ALGORITHM = "AES";

    public static byte[] encrypt(String data, String key) throws Exception {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM);
        keyGenerator.init(128);
        SecretKey secretKey = keyGenerator.generateKey();
        byte[] enCodeFormat = secretKey.getEncoded();
        SecretKeySpec secretKeySpec = new SecretKeySpec(enCodeFormat, ALGORITHM);
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
        byte[] bytes = cipher.doFinal(data.getBytes());
        return bytes;
    }

    public static String decrypt(byte[] data, String key) throws Exception {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM);
        keyGenerator.init(128);
        SecretKey secretKey = keyGenerator.generateKey();
        byte[] enCodeFormat = secretKey.getEncoded();
        SecretKeySpec secretKeySpec = new SecretKeySpec(enCodeFormat, ALGORITHM);
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
        byte[] result = cipher.doFinal(data);
        return new String(result);
    }

}

4.3 隐藏文字解密模块

在隐藏文字解密模块中,我们需要从Word文档中提取出隐藏文字,并使用AES算法对其进行解密。

import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;

import java.io.FileInputStream;
import java.util.List;

public class WordUtils {

    // ...其他代码
    
    public void insertHiddenText(String text, String key) {
        try {
            byte[] encryptedBytes = AESUtils.encrypt(text, key);
            XWPFParagraph paragraph = document.createParagraph();
            XWPFRun run = paragraph.createRun();
            run.getCTR().addNewRPr().addNewVanish();
            run.setText(new String(encryptedBytes));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    public String extractHiddenText(String filePath, String key) {
        try {
            FileInputStream fis = new FileInputStream(filePath);
            XWPFDocument document = new XWPFDocument(fis);
            List<XWPFParagraph> paragraphs = document.getParagraphs();
            StringBuilder sb = new StringBuilder();
            for (XWPFParagraph paragraph : paragraphs) {
                List<XWPFRun> runs = paragraph.getRuns();
                for (XWPFRun run : runs) {
                    if (run.getCTR().getRPr() != null && run.getCTR().