java复制文件或文件夹

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.Calendar;
public class CopyFileTest {

private static String CODE_UTF_8="UTF-8";

private static String CODE_GBK="GBK";

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

String orderNumber="11111_XD";
//处理“目标文件夹”
String urlTarget = "Y:"+File.separator;
Calendar cal=Calendar.getInstance();
if(cal.get(Calendar.MONTH)<9){
urlTarget=urlTarget+cal.get(Calendar.YEAR)+"-0"+(cal.get(Calendar.MONTH)+1)+"-"+cal.get(Calendar.DATE)+File.separator+orderNumber;
}else{
urlTarget=urlTarget+cal.get(Calendar.YEAR)+"-"+(cal.get(Calendar.MONTH)+1)+"-"+cal.get(Calendar.DATE)+File.separator+orderNumber;
}
File fileTarget=new File(urlTarget);
// 创建目标文件夹
if(!fileTarget.exists()) {
try {
fileTarget.mkdirs();
} catch (Exception e) {
e.printStackTrace();
}
}
//处理“源文件夹”
String sourceUrl = "D:"+File.separator+"amazons3"+File.separator+"order"+File.separator+orderNumber;
//获取源文件夹当前下的文件或目录
File[] file = (new File(sourceUrl)).listFiles();

for (int i = 0; i < file.length; i++) {
if (file[i].isDirectory()) {
// 复制目录
String sourceDir = sourceUrl + File.separator + file[i].getName();
String targetDir = urlTarget + File.separator + file[i].getName();
copyDirectiory(sourceDir, targetDir);
}
if (file[i].isFile()) {
// 复制文件
String type = file[i].getName().substring(file[i].getName().lastIndexOf(".") + 1);

if (type.equalsIgnoreCase("txt"))// 转码处理
copyFile(file[i], new File(urlTarget + file[i].getName()), CopyFileTest.CODE_UTF_8, CopyFileTest.CODE_GBK);
else
copyFile(file[i], new File(urlTarget + file[i].getName()));
}
}
}
// 复制文件
public static void copyFile(File sourceFile, File targetFile) throws IOException {
BufferedInputStream inBuff = null;
BufferedOutputStream outBuff = null;
try {
// 新建文件输入流并对它进行缓冲
inBuff = new BufferedInputStream(new FileInputStream(sourceFile));

// 新建文件输出流并对它进行缓冲
outBuff = new BufferedOutputStream(new FileOutputStream(targetFile));

// 缓冲数组
byte[] b = new byte[1024 * 5];
int len;
while ((len = inBuff.read(b)) != -1) {
outBuff.write(b, 0, len);
}
// 刷新此缓冲的输出流
outBuff.flush();
} finally {
// 关闭流
if (inBuff != null)
inBuff.close();
if (outBuff != null)
outBuff.close();
}
}

//复制文件夹
public static void copyDirectiory(String sourceDir, String targetDir) throws IOException {
// 新建目标目录
(new File(targetDir)).mkdirs();
// 获取源文件夹当前下的文件或目录
File[] file = (new File(sourceDir)).listFiles();
for (int i = 0; i < file.length; i++) {
if (file[i].isFile()) {
// 源文件
File sourceFile = file[i];
// 目标文件
File targetFile = new File(new File(targetDir).getAbsolutePath() + File.separator + file[i].getName());
copyFile(sourceFile, targetFile);
}
if (file[i].isDirectory()) {
// 准备复制的源文件夹
String dir1 = sourceDir + "/" + file[i].getName();
// 准备复制的目标文件夹
String dir2 = targetDir + "/" + file[i].getName();
copyDirectiory(dir1, dir2);
}
}
}

/**
*
* @param srcFileName
* @param destFileName
* @param srcCoding
* @param destCoding
* @throws IOException
*/
public static void copyFile(File srcFileName, File destFileName, String srcCoding, String destCoding) throws IOException {// 把文件转换为GBK文件
BufferedReader br = null;
BufferedWriter bw = null;
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(srcFileName), srcCoding));
bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(destFileName), destCoding));
char[] cbuf = new char[1024 * 5];
int len = cbuf.length;
int off = 0;
int ret = 0;
while ((ret = br.read(cbuf, off, len)) > 0) {
off += ret;
len -= ret;
}
bw.write(cbuf, 0, off);
bw.flush();
} finally {
if (br != null)
br.close();
if (bw != null)
bw.close();
}
}

/**
*
* @param filepath
* @throws IOException
*/
public static void del(String filepath) throws IOException {
File f = new File(filepath);// 定义文件路径
if (f.exists() && f.isDirectory()) {// 判断是文件还是目录
if (f.listFiles().length == 0) {// 若目录下没有文件则直接删除
f.delete();
} else {// 若有则把文件放进数组，并判断是否有下级目录
File delFile[] = f.listFiles();
int i = f.listFiles().length;
for (int j = 0; j < i; j++) {
if (delFile[j].isDirectory()) {
del(delFile[j].getAbsolutePath());// 递归调用del方法并取得子目录路径
}
delFile[j].delete();// 删除文件
}
}
}
}

}