采用不同的方式，合并多个文件为一个文件。其中包括：Java方法，Windows脚本，CMD命令-编程知识

采用不同的方式，合并多个文件为一个文件。其中包括：Java方法，Windows脚本，CMD命令

1. 批处理命令

可以实现不同文件的合并，将文件拖入这个命令即可。在这里插入图片描述

 @echo off
setlocal enabledelayedexpansionset "outputFile=merged_output.txt"rem Check if the output file already exists and delete it
if exist "%outputFile%" del "%outputFile%"rem Loop through all the dragged files
for %%I in (%*) do (type "%%I" >> "%outputFile%"
)echo Files merged successfully into %outputFile%
pause

在这里插入图片描述

2.合并.sql结尾的文件

```java
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileStore;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Stream;public class MergeSqlFiles {public static void main(String[] args) {// 输入SQL文件夹路径String sqlFolder = "originalPath";// 合并后的文件路径和名称String mergedFilePath = "targetPath\\merged.sql";//方法1mergeSqlFiles(sqlFolder, mergedFilePath);//方法2mergeSqlFilesByStream(sqlFolder, mergedFilePath);}/*** 合并多个sql文件为一个sql文件** @param folderPath* @param mergedFilePath*/public static void mergeSqlFiles(String folderPath, String mergedFilePath) {//获取文件夹File floder = new File(folderPath);File[] files = floder.listFiles();//新的文件夹File newFile = new File(mergedFilePath);try (BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(newFile))) {if (files != null) {for (File file : files) {if (file.isFile() && file.getName().endsWith(".sql") && !file.getName().startsWith("merged")) {//读取文件内的内容System.out.println("merging file: " + file.getName());try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file))) {String line;while ((line = bufferedReader.readLine()) != null) {//写入新的一行bufferedWriter.write(line);//写入换行符号bufferedWriter.newLine();}} catch (Exception e) {throw new RuntimeException(e);}}}}} catch (IOException e) {throw new RuntimeException(e);}}public static void mergeSqlFilesByStream(String folderPath, String mergedFilePath) {//获取文件夹Path floder = Paths.get(folderPath);//新的文件夹Path mergeFile = Paths.get(mergedFilePath);try (OutputStream outputStream = new BufferedOutputStream(Files.newOutputStream(mergeFile))) {if (Files.isDirectory(floder)) {Files.list(floder).filter(file -> file.toFile().isFile() && file.getFileName().toString().endsWith(".sql") && !file.getFileName().toString().startsWith("merge")).forEach(file -> {System.out.println("mergeFile:   " + file.getFileName());try (InputStream inputStream = new BufferedInputStream(Files.newInputStream(file))) {byte[] bytes = new byte[1024];int bytesRead;while ((bytesRead=inputStream.read(bytes))!=-1){outputStream.write(bytes,0,bytesRead);}outputStream.write(System.lineSeparator().getBytes(StandardCharsets.UTF_8));} catch (IOException e) {throw new RuntimeException(e);}});}} catch (IOException e) {throw new RuntimeException(e);}}}