import java.io.File;

import java.io.IOException;

import org.apache.commons.io.FileUtils;

public class MyFileUtils {

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

        String srcPath = "F:/copyFile/src";

        String destPath = "F:/copyFile/dest123";

        copyFile(srcPath, destPath);

        // copyDirectory(srcPath, destPath);

        // readFileToString(srcPath);

    }

    // 创建文件夹

    public static void makeDir(String destPath) {

        File newFilePath = new File(destPath);

        if (!newFilePath.exists()) {

            newFilePath.mkdirs();

        }

    }

    // 复制文件夹及其内容

    public static void copyDirectory(String srcPath, String destPath) throws IOException {

        File file = new File(srcPath);

        makeDir(destPath);

        File destFile = new File(destPath);

        FileUtils.copyDirectory(file, destFile);

    }

    // 复制文件(应用场景：复制的同时更改文件名称)

    public static void copyFile(String srcPath, String destPath) throws IOException {

        File src = new File(srcPath);

        makeDir(destPath);

        File[] srcFiles = src.listFiles();

        if (srcFiles.length > 0) {

            for (File file : srcFiles) {

                String filename = file.getName();

                if (file.isDirectory()) {

                    copyFile(file.getAbsolutePath(), destPath);

                }

                if (filename.endsWith("html")) {

                    int index = filename.indexOf(".");

                    String newFileName = filename.substring(0, index) + "复制" + filename.substring(index);

                    File destFile = new File(destPath + "/" + newFileName);

                    FileUtils.copyFile(file, destFile);

                }

            }

        }

    }

    // 把文件 内容转成字符串

    public static void readFileToString(String srcPath) throws IOException {

        File src = new File(srcPath);

        File[] srcFiles = src.listFiles();

        if (srcFiles.length > 0) {

            for (File file : srcFiles) {

                String filename = file.getName();

                if (file.isDirectory()) {

                    readFileToString(file.getAbsolutePath());

                }

                if (filename.endsWith("html")) {

                    String str = FileUtils.readFileToString(file, "utf-8");

                    System.out.println(str);

                }

            }

        }

    }

}