package cn.hnb.test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
public class FileUtil {
/**
* 文件复制
* @param srcPath 源文件路径
* @param targetPath 复制后存放路径
* @throws Exception
*/
public static void copyFile(String srcPath, String targetPath) throws Exception {
File srcFile = new File(srcPath);
File target = new File(targetPath);
if (!srcFile.exists()) {
throw new Exception("文件不存在!");
}
if (!srcFile.isFile()) {
throw new Exception("不是文件!");
}
//判断目标路径是否是目录
if (!target.isDirectory()) {
throw new Exception("文件路径不存在!");
}
// 获取源文件的文件名
String fileName = srcPath.substring(srcPath.lastIndexOf("\\") + 1);
//TODO:判断是否存在相同的文件名的文件
File[] listFiles = target.listFiles();
for (File file : listFiles) {
if(fileName.equals(file.getName())){
fileName += "_1";
}
}
String newFileName = targetPath + File.separator + fileName;
File targetFile = new File(newFileName);
FileInputStream in = null;
FileOutputStream out = null;
try {
in = new FileInputStream(srcFile);
out = new FileOutputStream(targetFile);
//从in中批量读取字节,放入到buf这个字节数组中,
// 从第0个位置开始放,最多放buf.length个 返回的是读到的字节的个数
byte[] buf = new byte[8 * 1024];
int len = 0;
while ((len = in.read(buf)) != -1) {
out.write(buf, 0, len);
out.flush();
}
} catch (Exception e) {
e.printStackTrace();
}finally {
try{
if(in != null){
in.close();
}
}catch(Exception e){
System.out.println("关闭输入流错误!");
}
try{
if(out != null){
out.close();
}
}catch(Exception e){
System.out.println("关闭输出流错误!");
}
}
}
//测试
public static void main(String[] args) throws Exception {
copyFile("C:\\Users\\admin\\Desktop\\test\\1-2.txt", "C:\\Users\\admin\\Desktop\\test");
}
}
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作者:storm_fury
来源:CSDN
原文:https://blog.csdn.net/weixin_43215250/article/details/82908286
版权声明:本文为博主原创文章,转载请附上博文链接!
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