java 实现复制文件到指定目录

 将resource下的目录及文件，复制一份到指定目录，代码实现

import cn.hutool.core.io.FileUtil;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import java.io.File;
import java.io.IOException;

/**
 * @author Lenovo
 */
public class StaticResourcesInit {
/**
     * 将resource下的目录，复制一份到指定目录
     * @param resourcePath resource下的目录，会读取下面的文件（不包含本身）
     * @param newRootPath 新的根目录
     * @param force 是否强制刷新，true表示会删除新的根目录下的所有文件
     */
    public void copyResources(String resourcePath,String newRootPath,boolean force) {
        File newRootFile = new File(newRootPath);
        if(newRootFile.exists() && force) {
            System.out.println("删除新的根目录"+newRootPath+"："+ FileUtil.del(newRootFile));
        }
        String rootPath = this.getClass().getClassLoader().getResource("static").getPath();
        if("\\".equals(File.separator)) {
            if(rootPath.startsWith("/")) {
                rootPath = rootPath.substring(1);
            }
            rootPath = rootPath.replaceAll("/","\\\\");
        }
        System.out.println("项目根目录："+rootPath);
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        try {
            Resource[] resources = resolver.getResources("classpath:"+resourcePath+"/**");
            if(null!=resources || resources.length>0) {
                for (Resource resource : resources) {
                    File file = resource.getFile();
                    String newFilePath = file.getPath().replace(rootPath,newRootPath);
                    File newFile = new File(newFilePath);
                    if(!newFile.exists()) {
                        FileUtil.copy(file,newFile,true);
                        System.out.println("源文件："+file.getAbsolutePath()+"已复制到："+newFile.getAbsolutePath());
                    } else {
                        System.out.println("文件"+newFile.getAbsolutePath()+"已存在，不需要处理...");
                    }
                    // FileUtil.copy(file,FileUtil.newFile(file.getPath().replace(rootPath,newRootPath)),true);
                }
                System.out.println("resource下"+resourcePath+"目录下（不包含本身）的文件已全部复制到"+newRootPath);
            } else {
                System.out.println("未读取到"+resourcePath+"目录或目录下没有任何文件");
            }
        } catch (IOException e) {
            System.out.println("读取目录："+resourcePath+"异常，"+e.getMessage());
            e.printStackTrace();
        }
}

    public static void main(String[] args) {
        new StaticResourcesInit().copyResources("static","D:\\test",true);
    }