在使用java进行开发时常常会用到文件和目录的增删复制等方法。我写了一个小工具类。和大家分享，希望大家指正：
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package com.wangpeng.utill;
import java.io.file;
import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.filewriter;
import java.io.inputstream;
import java.io.printwriter;
/**
* @author wangpeng
*
*/
public class tooloffile {
/**
* 创建目录
*
* @param folderpath
* 目录目录
* @throws exception
*/
public static void newfolder(string folderpath) throws exception {
try {
java.io.file myfolder = new java.io.file(folderpath);
if (!myfolder.exists()) {
myfolder.mkdir();
}
} catch (exception e) {
throw e;
}
}
/**
* 创建文件
*
* @param filepath
* 文件路径
* @throws exception
*/
public static void newfile(string filepath) throws exception {
try {
file myfile = new file(filepath);
if (!myfile.exists()) {
myfile.createnewfile();
}
} catch (exception e) {
throw e;
}
}
/**
* 创建文件，并写入内容
*
* @param filepath
* 文件路径
* @param filecontent
* 被写入的文件内容
* @throws exception
*/
public static void newfile(string filepath, string filecontent)
throws exception {
// 用来写入字符文件的便捷类
filewriter filewriter = null;
// 向文本输出流打印对象的格式化表示形式,使用指定文件创建不具有自己主动行刷新的新
printwriter printwriter = null;
try {
file myfile = new file(filepath);
if (!myfile.exists()) {
myfile.createnewfile();
}
filewriter = new filewriter(myfile);
printwriter = new printwriter(filewriter);
printwriter.print(filecontent);
printwriter.flush();
} catch (exception e) {
throw e;
} finally {
if (printwriter != null) {
printwriter.close();
}
if (filewriter != null) {
filewriter.close();
}
}
}
/**
* 复制文件
*
* @param oldpath
* 被拷贝的文件
* @param newpath
* 复制到的文件
* @throws exception
*/
public static void copyfile(string oldpath, string newpath)
throws exception {
inputstream instream = null;
fileoutputstream outstream = null;
try {
int byteread = 0;
file oldfile = new file(oldpath);
// 文件存在时
if (oldfile.exists()) {
instream = new fileinputstream(oldfile);
outstream = new fileoutputstream(newpath);
byte[] buffer = new byte[1444];
while ((byteread = instream.read(buffer)) != -1) {
outstream.write(buffer, 0, byteread);
}
outstream.flush();
}
} catch (exception e) {
throw e;
} finally {
if (outstream != null) {
outstream.close();
}
if (instream != null) {
instream.close();
}
}
}
/**
* 复制文件
* @param instream 被拷贝的文件的输入流
* @param newpath 被复制到的目标
* @throws exception
*/
public static void copyfile(inputstream instream, string newpath)
throws exception {
fileoutputstream outstream = null;
try {
int byteread = 0;
outstream = new fileoutputstream(newpath);
byte[] buffer = new byte[1444];
while ((byteread = instream.read(buffer)) != -1) {
outstream.write(buffer, 0, byteread);
}
outstream.flush();
} catch (exception e) {
throw e;
} finally {
if (outstream != null) {
outstream.close();
}
if (instream != null) {
instream.close();
}
}
}
/**
* 复制目录
*
* @param oldpath
* 被复制的目录路径
* @param newpath
* 被复制到的目录路径
* @throws exception
*/
public static void copyfolder(string oldpath, string newpath)
throws exception {
try {
(new file(newpath)).mkdirs(); // 假设目录不存在 则建立新目录
file a = new file(oldpath);
string[] file = a.list();
file tempin = null;
for (int i = 0; i < file.length; i++) {
if (oldpath.endswith(file.separator)) {
tempin = new file(oldpath + file[i]);
} else {
tempin = new file(oldpath + file.separator + file[i]);
}
if (tempin.isfile()) {
copyfile(tempin.getabsolutepath(),
newpath + "/" + (tempin.getname()).tostring());
} else if (tempin.isdirectory()) {// 假设是子目录
copyfolder(oldpath + "/" + file[i], newpath + "/" + file[i]);
}
}
} catch (exception e) {
throw e;
}
}
/**
* 删除文件
*
* @param filepathandname
*/
public static void delfilex(string filepathandname) {
file mydelfile = new file(filepathandname);
mydelfile.delete();
}
/**
* 删除目录
*
* @param path
*/
public static void delforder(string path) {
file deldir = new file(path);
if (!deldir.exists()) {
return;
}
if (!deldir.isdirectory()) {
return;
}
string[] templist = deldir.list();
file temp = null;
for (int i = 0; i < templist.length; i++) {
if (path.endswith(file.separator)) {
temp = new file(path + templist[i]);
} else {
temp = new file(path + file.separator + templist[i]);
}
if (temp.isfile()) {
temp.delete();
} else if (temp.isdirectory()) {
// 删除完里面全部内容
delforder(path + "/" + templist[i]);
}
}
deldir.delete();
}
public static void main(string[] args) {
string oldpath = "f:/test/aaa/";
string newpath = "f:/test/bbb/";
try {
// tooloffile.newfolder("f:/test/hello/");
// tooloffile.newfile("f:/test/hello/world.txt","我爱你，the world！
");
tooloffile.copyfolder(oldpath, newpath);
// tooloffile.delforder("f:/test/hello");
} catch (exception e) {
e.printstacktrace();
}
system.out.println("ok");
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。
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