代码语言：javascript复制
package com.gtf.rz.Test02;
public class FileUtils {
/*判断文件是否存在*/
public static boolean isExists(String filePath) {
File file = new File(filePath);
return file.exists();
}
/*判断是否是文件夹*/
public static boolean isDir(String path) {
File file = new File(path);
if (file.exists()) {
return file.isDirectory();
} else {
return false;
}
}
/**
* 文件或者目录重命名
*
* @param oldFilePath 旧文件路径
* @param newName 新的文件名,可以是单个文件名和绝对路径
* @return
*/
public static boolean renameTo(String oldFilePath, String newName) {
try {
File oldFile = new File(oldFilePath);
//若文件存在
if (oldFile.exists()) {
//判断是全路径还是文件名
if (newName.indexOf("/") < 0 && newName.indexOf("\") < 0) {
//单文件名，判断是windows还是Linux系统
String absolutePath = oldFile.getAbsolutePath();
if (newName.indexOf("/") > 0) {
//Linux系统
newName = absolutePath.substring(0, absolutePath.lastIndexOf("/") 1) newName;
} else {
newName = absolutePath.substring(0, absolutePath.lastIndexOf("\") 1) newName;
}
}
File file = new File(newName);
//判断重命名后的文件是否存在
if (file.exists()) {
System.out.println("该文件已存在,不能重命名");
} else {
//不存在，重命名
return oldFile.renameTo(file);
}
} else {
System.out.println("原该文件不存在,不能重命名");
}
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
/*文件拷贝操作*/
public static void copy(String sourceFile, String targetFile) {
File source = new File(sourceFile);
File target = new File(targetFile);
target.getParentFile().mkdirs();
FileInputStream fis = null;
FileOutputStream fos = null;
FileChannel in = null;
FileChannel out = null;
try {
fis = new FileInputStream(source);
fos = new FileOutputStream(target);
in = fis.getChannel();//得到对应的文件通道
out = fos.getChannel();//得到对应的文件通道
in.transferTo(0, in.size(), out);//连接两个通道，并且从in通道读取，然后写入out通道
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
if (fos != null) {
fos.close();
}
if (fis != null) {
fis.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/*读取Text文件操作*/
public static String readText(String filePath) {
String lines = "";
try {
FileReader fileReader = new FileReader(filePath);
BufferedReader bufferedReader = new BufferedReader(fileReader);
String line = null;
while ((line = bufferedReader.readLine()) != null) {
lines = line "n";
}
} catch (Exception e) {
e.printStackTrace();
}
return lines;
}
/*写入Text文件操作*/
public static void writeText(String filePath, String content, boolean isAppend) {
FileOutputStream outputStream = null;
OutputStreamWriter outputStreamWriter = null;
BufferedWriter bufferedWriter = null;
try {
outputStream = new FileOutputStream(filePath, isAppend);
outputStreamWriter = new OutputStreamWriter(outputStream);
bufferedWriter = new BufferedWriter(outputStreamWriter);
bufferedWriter.write(content);
bufferedWriter.newLine();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (bufferedWriter != null) {
bufferedWriter.close();
}
if (outputStreamWriter != null) {
outputStreamWriter.close();
}
if (outputStream != null) {
outputStream.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
