Java工具类记录

HTML转word

相关依赖

<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>4.1.2</version></dependency>

import org.apache.poi.poifs.filesystem.DirectoryEntry;
import org.apache.poi.poifs.filesystem.DocumentEntry;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import java.io.*;
import java.nio.charset.StandardCharsets;/***html转成word文档引入如下依赖<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>4.1.2</version></dependency>*/
public class HtmlToWordUtils {public static void main(String[] args) throws Exception {String htmlFile = "D:\\2023\\code\\javaCode\\src\\main\\resources\\test.html";String wordFile = "D:\\2023\\code\\javaCode\\src\\main\\java\\test\\htmlToWord\\abc.doc";htmlToDocToLocal(readFileContent(htmlFile), wordFile);}/*** @param richText 富文本内容* @param localFilePath 输出文件地址* @throws Exception*/public static void htmlToDocToLocal(String richText, String localFilePath) throws Exception {// 设置编码byte[] bytes = richText.getBytes("UTF-8");try (ByteArrayInputStream bais = new ByteArrayInputStream(bytes);){POIFSFileSystem poifs = new POIFSFileSystem();// ##############下面这两个不能删掉DirectoryEntry directory = poifs.getRoot();DocumentEntry documentEntry = directory.createDocument("WordDocument", bais);// ################这两个不能删掉// 输出到本地文件try (OutputStream ostream = new FileOutputStream(localFilePath);){poifs.writeFilesystem(ostream);}}}// 读取文件内容public static String readFileContent(String filePath) throws Exception {StringBuilder sb = new StringBuilder();try (FileInputStream fis = new FileInputStream(filePath)) {byte[] buffer = new byte[1024];int readBytes;while ((readBytes = fis.read(buffer)) != -1) {sb.append(new String(buffer, 0, readBytes, StandardCharsets.UTF_8));}}return sb.toString();}
}

解析HTML文件

压缩文件

import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;public class ZipFileUtils {public static void main(String[] args) throws Exception {// 压缩后的文件String zipFile = "D:\\lzc\\example.zip";// 需要压缩的文件夹String folderToCompress = "D:\\lzc\\ab";compress(zipFile, folderToCompress, true);}/*** @param zipFile 压缩包名称* @param folderName 压缩文件夹* @param recursive 是否需要递归压缩*/public static void compress(String zipFile, String folderName, boolean recursive) throws IOException {try (ZipOutputStream zipOutputStream = new ZipOutputStream(new FileOutputStream(zipFile))) {if (recursive) {// 需要递归压缩文件夹下所有的文件+目录compressFolder(folderName, folderName, zipOutputStream);} else {// 只压缩当前文件夹的文件compressCurrentFolder(folderName, zipOutputStream);}}}/*** 只压缩当前文件夹下的文件* @param folderName* @param zipOutputStream* @throws IOException*/public static void compressCurrentFolder(String folderName, ZipOutputStream zipOutputStream) throws IOException {File folder = new File(folderName);File[] files = folder.listFiles();if (files == null) {return;}for (File file : files) {if (file.isDirectory()) {continue;}addToZipFile(file.getName(), file.getAbsolutePath(), zipOutputStream);}}/*** 递归遍历所有的文件并打包* @param sourceFolder 要压缩的文件夹* @param folderName 需要递归的文件夹* @param zipOutputStream 压缩文件* @throws IOException*/public static void compressFolder(String sourceFolder, String folderName, ZipOutputStream zipOutputStream) throws IOException {File folder = new File(folderName);File[] files = folder.listFiles();if (files == null) {return;}for (File file : files) {if (file.isDirectory()) {// 压缩子文件夹compressFolder(sourceFolder, file.getAbsolutePath(), zipOutputStream);} else {// 压缩文件String absolutePath = file.getAbsolutePath();addToZipFile(absolutePath.replace(sourceFolder,""), absolutePath, zipOutputStream);}}}/*** 将文件添加到压缩包中* @param fileName* @param fileAbsolutePath* @param zipOutputStream* @throws IOException*/public static void addToZipFile(String fileName, String fileAbsolutePath, ZipOutputStream zipOutputStream) throws IOException {// 创建ZipEntry对象并设置文件名ZipEntry entry = new ZipEntry(fileName);zipOutputStream.putNextEntry(entry);// 读取文件内容并写入Zip文件try (FileInputStream fileInputStream = new FileInputStream(fileAbsolutePath)) {byte[] buffer = new byte[1024];int bytesRead;while ((bytesRead = fileInputStream.read(buffer)) != -1) {zipOutputStream.write(buffer, 0, bytesRead);}}// 完成当前文件的压缩zipOutputStream.closeEntry();}
}

图片工具类

import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.util.Base64;public class ImageUtils {/*** 将本地文件转换成HTML中img标签能识别的src* @param filePath 图片地址* @return* @throws IOException*/public static String localImageToHtmlImgBase64(String filePath) throws IOException {File file = new File(filePath);String fileName = file.getName();String imageType = fileName.substring(fileName.lastIndexOf(".") + 1);return "data:image/" + imageType + ";base64," + localFileToBase64(filePath);}/*** 将本地文件转换成base64* @param filePath 文件地址* @return*/public static String localFileToBase64(String filePath) throws IOException {try (InputStream inputStream = new FileInputStream(filePath)){int available = inputStream.available();byte[] bytes = new byte[available];inputStream.read(bytes);return Base64.getEncoder().encodeToString(bytes);}}/*** 将图片下载到本地* @param imageUrl* @param localFilePath* @throws IOException*/public static void imageUrlToLocalFile(String imageUrl, String localFilePath) throws IOException {// 打开连接URL url = new URL(imageUrl);URLConnection connection = url.openConnection();// 设置请求超时为5秒connection.setConnectTimeout(5 * 1000);// 读取数据流并保存到本地try (InputStream input = connection.getInputStream()){byte[] data = new byte[1024];int len;try (FileOutputStream output = new FileOutputStream(localFilePath)){while ((len = input.read(data)) != -1) {output.write(data, 0, len);}}}}
}