引入依赖

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.11.0</version>
</dependency>

code  拷贝文件夹

@PostMapping("/findB00List")
@CrossOrigin
public Result findB00List(String b00) throws SQLException, IOException {

    // 拷贝文件夹
    File file1 = new File("E:\\test01");
    File file2 = new File("E:\\test02");
    FileUtils.copyDirectoryToDirectory(file1,file2);

    // 拷贝文件
    /*File file3 = new File("day13\\aaa\\hbCopy1.jpg");
    File file4 = new File("day13\\fff");
    FileUtils.copyFileToDirectory(file3,file4);*/


 List<String>  B00List= dictService.findB00List(b00);

    return Result.ok(B00List);
}

 code  拷贝文件