标签:rect etl director class com oid outline static ros
复制多级文件,将一个文件夹中的所有内容复制到另一个文件夹中。
设计递归方法,通过传入源文件和目的文件,将源文件中内容完全复制到目的文件中:
代码如下:
private static void copyFolder(File srcFile, File destFile) throws IOException { //srcFile为源文件,destFile为目的文件 if (srcFile.isDirectory()) { File newFolder = new File(destFile, srcFile.getName()); newFolder.mkdir(); File[] fileArray = srcFile.listFiles(); for (File file : fileArray) { copyFolder(file, newFolder); } } else { File newFile = new File(destFile, srcFile.getName()); copyFile(srcFile, newFile); } }
定义复制文件的方法:(运用字节缓冲流)
private static void copyFile(File srcFile, File newFile) throws IOException { BufferedInputStream bis = new BufferedInputStream(new FileInputStream(srcFile)); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(newFile)); byte[] bys = new byte[1024]; int len = 0; while ((len = bis.read(bys)) != -1) { bos.write(bys, 0, len); } bos.close(); bis.close(); }
public class MyLineNumberReader {private Reader r;private int lineNmber = 0;
public MyLineNumberReader(Reader r) {this.r = r;}
public int getLineNmber() {return lineNmber;}
public void setLineNmber(int lineNmber) {this.lineNmber = lineNmber;}
public String readLine() throws IOException {lineNmber++; //当读取每一行数据时,相应的行数加一
StringBuilder sb = new StringBuilder();
int ch = 0;while ((ch = r.read()) != -1) { // 依次读取单个字符if (ch == ‘\r‘) {continue;}if (ch == ‘\n‘) { // 当遇到换行符时,输出本行所有数据return sb.toString();} else {sb.append((char) ch); // 依次存储换行符之前的每个字符}}
if (sb.length() > 0) { // 为防止数据丢失,判断sb的长度是否大于0return sb.toString();}
return null;}
public void close() throws IOException {this.r.close();}}————————————————版权声明:本文为CSDN博主「流年锦时」的原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接及本声明。原文链接:https://blog.csdn.net/qq_36653524/article/details/100154823
标签:rect etl director class com oid outline static ros
原文地址:https://www.cnblogs.com/LiuNianJinShi/p/11436851.html