Java IO 文件流的读,文件流写Writer,Reader,InputStream,OutputStream封装！
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2022-04-23 17:50:00
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package com.app.common;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Writer;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import org.dom4j.Document;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
*@Author:jilongliang
*@Date:2013-8-11
*@version:1.0
*@Email:jilongliang@sina.com
*===============================================================================================================
*实际上字节流在操作时本身不会用到缓冲区（内存），是文件本身直接操作的，而字符流在操作时使用了缓冲区，通过缓冲区再操作文件。
*
*字符流和字节流是根据处理数据的不同来区分的。字节流按照8位传输，字符流按照16位传输
*由于字符流使用Unicode字符集，支持多国文字，因此若流要跨越多种平台传输，应使用字符流。
*===============================================================================================================
*char型是字符型,占2个字节,默认数值'\u0000',取值范围'\u0000'~'\uffff'
*byte是字节型,占1个字节,默认数值0,取值范围-128～127
*boolean 无符号 8 位
*byte 无符号,8 位
*char 无符号,16 位
*short 有符号,16 位
*int \ 有符号,32 位
*long 有符号,64 位
*float 32 位
*double 64 位
*===============================================================================================================
*字节流输出--->>程序-->>字节流---->文件(直接操作文件)
*
*字符流输出--->>程序-->>字符流---->>缓存--->>文件(数据线放在缓存,之后再从缓存写入文件)
*
*------------------------------------------------------------------------------------------------------------------
*@Description:字节流
*@InputStream
* FileInputStream, FilterInputStream,BufferedInputStream, CheckedInputStream, CipherInputStream,
* DataInputStream, DeflaterInputStream, DigestInputStream, InflaterInputStream, LineNumberInputStream,
* ProgressMonitorInputStream, PushbackInputStream ,AudioInputStream, ByteArrayInputStream, FileInputStream,
* ObjectInputStream, PipedInputStream, SequenceInputStream, StringBufferInputStream
-------------------------------------------------------------------------------------------------------------------
*@OutputStream
* FileOutputStream, FilterOutputStream,BufferedOutputStream, CheckedOutputStream, CipherOutputStream,
* DataOutputStream, DeflaterOutputStream, DigestOutputStream, InflaterOutputStream, LineNumberOutputStream,
* ProgressMonitorOutputStream, PushbackOutputStream ,AudioOutputStream, ByteArrayOutputStream, FileOutputStream,
* ObjectOutputStream, PipedOutputStream, SequenceOutputStream, StringBufferOutputStream
*
--------------------------------------------------------------------------------------------------------------------
*
*@Description字符流
*@Writer
* BufferedWriter, CharArrayWriter, FilterWriter, OutputStreamWriter, PipedWriter, PrintWriter, StringWriter
*------------------------------------------------------------------------------------------------------------------
*@Reader
*
*BufferedReader, CharArrayReader, FilterReader, InputStreamReader, PipedReader, StringReader
*------------------------------------------------------------------------------------------------------------------
*/
@SuppressWarnings("all")
public class IOUtil {
private static String content = "",line=System.getProperty("line.separator");//换行相当于\n
private static List fileList = new ArrayList();
private static File tempFile = null;
private static final long KB = 1024;// KB
private static final long MB = KB * KB;// MB
private static final long GB = KB * MB;// GB
private static final int byt = 2048;
private static File f=new File("");
private static BASE64Encoder encoder = new BASE64Encoder();// 加密
private static BASE64Decoder decoder = new BASE64Decoder();// 解密
private static String webRootPath;
private static String rootClassPath;
/**
* 读文件流
* @param formPath从哪里读取的文件路径
* @return
*/
public static String reader1(String formPath) {
FileReader read = null;
BufferedReader reader = null;
try {
read = new FileReader(new File(formPath));
reader = new BufferedReader(read);
StringBuffer buffer = new StringBuffer("");
content = reader.readLine();
while (content != null) {
buffer.append(content).append(line);
content = reader.readLine();
}
return content = buffer.toString();//返回
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (reader != null)reader.close();
if (read != null)read.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return "";//没值就返回空
}
/**
* 读文件
* @param formPath
* @return
*/
public static String reader2(String formPath){
try {
InputStream is=new FileInputStream(new File(formPath));
InputStreamReader reader=new InputStreamReader(is);
//不够大的时候读不出来全部内容来的,他不像available拿多所就读多少
char c[] = new char[1024*1024];//1M=1024*1024,根据需求定
int len = reader.read(c);
content=new String(c, 0, len);
if(reader!=null)reader.close();
//if(is!=null)is.close();
return content;
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
/**
* InputStreamReader
* ByteArrayOutputStream
* ByteArrayInputStream
* @param formPath
* @return
*/
public static String reader3(String formPath){
String newName="";
try {
InputStream is=new FileInputStream(new File(formPath));
InputStreamReader reader=new InputStreamReader(is);
//不够大的时候读不出来全部内容来的,他不像available拿多所就读多少
char c[] = new char[is.available()];//1M=1024*1024,根据需求定
int len = reader.read(c);
content=new String(c, 0, len);
ByteArrayOutputStream bout = new ByteArrayOutputStream();
DataOutputStream dout = new DataOutputStream(bout);
dout.writeUTF(content);
byte[] buff = bout.toByteArray();
ByteArrayInputStream bin = new ByteArrayInputStream(buff);
DataInputStream dis = new DataInputStream(bin);
newName = dis.readUTF();
bout.flush();
dout.flush();
bout.close();
dout.close();
dis.close();
} catch (Exception e) {
e.printStackTrace();
}
return newName;
}
/**
* 写文件
* BufferedWriter
* BufferedReader
* @param formPath
* @param toPath
*/
public static boolean writer1(String formPath,String toPath){
Reader reader=null;
Writer writer=null;
boolean flag=true;
BufferedWriter buffWriter=null;
BufferedReader buffReader=null;
try {
reader=new FileReader(new File(formPath));
writer = new FileWriter(new File(toPath));//writer不能关闭
buffWriter=new BufferedWriter(writer);//这个写完可以关闭
buffReader=new BufferedReader(reader);
content=buffReader.readLine();
while(content!=null){
buffWriter.write(line+content);
content=buffReader.readLine();
buffWriter.flush();//只要用到缓冲区就flush//其实关闭了缓冲区,就是关闭缓冲区中流的对象. //写一次flush是为了防止停电就挂了~
}
reader.close();
buffReader.close();
buffWriter.close();
} catch (Exception e) {
e.printStackTrace();
return false;
}
return flag;
}
/**
* 写文件
* PrintWriter
* Writer
* Reader
* BufferedReader
* @param formPath
* @param toPath
*/
public static boolean writer2(String formPath,String toPath){
Reader reader=null;//FileReader reader=null;
PrintWriter writer=null;//PrintWriter
boolean flag=true;
BufferedWriter buffWriter=null;//此对象有换行newLine
BufferedReader buffReader=null;//为了提高效率,使用字符缓冲流BufferedReader
try {
reader=new FileReader(new File(formPath));
writer = new PrintWriter(new File(toPath));//writer不能关闭
buffWriter=new BufferedWriter(writer);//这个写完可以关闭
buffReader=new BufferedReader(reader);
content=buffReader.readLine();
while(content!=null){
buffWriter.write(line+content);
content=buffReader.readLine();
}
reader.close();
buffReader.close();
buffWriter.close();
} catch (Exception e) {
e.printStackTrace();
return false;
}
return flag;
}
/**
* 写文件
* InputStream
* OutputStream
* FileInputStream
* FileOutputStream
* @param from
* @param to
*/
public static void writer3(String from, String to) {
try {
InputStream in = new FileInputStream(new File(from));
OutputStream out = new FileOutputStream(new File(to));
byte[] buff = new byte[in.available()];
//byte[] buff = new byte[1024 * 1024];
int len = 0;
while ((len = in.read(buff)) != -1) {
out.write(buff, 0, len);
}
in.close();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 写文件
* @param from
* @param to
*/
public static void writer4(String from, String to) {
try {
InputStream in = new FileInputStream(new File(from));
OutputStream out = new FileOutputStream(new File(to));
byte[] buff = new byte[in.available()];
in.read(buff);
out.write(buff);
in.close();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 写文件
* @param formPath
* @param toPath
* @return
*/
public static boolean writer5(String formPath,String toPath) {
try {
InputStream input=new FileInputStream(new File(formPath));
OutputStream output=new FileOutputStream(new File(toPath));
byte [] byf=new byte[1024*1024];//这里就不能填那么大啦 byte不同char,byte
int len=0;
while((len=input.read())!=-1)
{
//input.read(byf);//读
output.write(byf, 0, len); //output.write(byf);//写
}
if(output!=null)output.close();
if(input!=null)input.close();
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 文件处理
* Writer
* OutputStreamWriter
* @param content
* OutputStreamWriter
* @param toPath写到那个路径下
* @return
*/
public static boolean writer6(String content, String toPath) {
boolean flag = true;
try {
Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(toPath), "utf-8"));//设置编码
out.write(line + content);
out.close();
} catch (Exception ex) {
ex.printStackTrace();
return false;
}
return flag;
}
/**
* BufferedOutputStream 套DataOutputStream套FileOutputStream
* 据说管道套管道效率效率比较高,具体没测试过!
* BufferedInputStream bis = new BufferedInputStream(new DataInputStream(new FileInputStream(new File(formPath))));
*
* @param formPath
* @param toPath写到那个路径下
* @return
*/
public static boolean writer7(String formPath, String toPath) {
boolean flag = true;
/**
*这里就不能填那么大啦 byte不同char,byte
*/
byte[] byt = new byte[1];
try {
//BufferedInputStream bis = new BufferedInputStream(new FileInputStream(formPath));
BufferedInputStream bis = new BufferedInputStream(new DataInputStream(new FileInputStream(new File(formPath))));
DataOutputStream dos=new DataOutputStream(new FileOutputStream(new File(toPath)));
BufferedOutputStream bos=new BufferedOutputStream(dos);
while(bis.read(byt)!=-1)
{
bos.write(byt);
System.out.println("文件已经写完!");
}
bos.flush();
bos.close();
} catch (Exception ex) {
ex.printStackTrace();
return false;
}
return flag;
}
/**
*
* BufferedInputStream
* ByteArrayOutputStream
* @param formPath
* @param toPath
* @return
*/
public static boolean writer8(String formPath,String toPath){
try {
BufferedInputStream bis=new BufferedInputStream(new FileInputStream(new File(formPath)));
ByteArrayOutputStream baos=new ByteArrayOutputStream();
int c=bis.read();//读取bis流中的下一个字节
while(c!=-1){
baos.write(c);
c=bis.read();
}
bis.close();
byte byt[]=baos.toByteArray();
FileOutputStream out=new FileOutputStream(new File(toPath));
out.write(byt);
out.close();
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 处理文件大小
*/
public static String fileSize(long file) {
if (file <= 0) {
return "";
} else if (file < MB) {
BigDecimal b = new BigDecimal((double) file / KB);
return b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue() + "K";
} else if (file < GB) {
BigDecimal b = new BigDecimal((double) file / MB);
return b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue() + "M";
} else {
BigDecimal b = new BigDecimal((double) file / GB);
return b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue() + "G";
}
}
/**
* 删除目录下的所有子目录和文件
*
* @param filepath
* @throws IOException
*/
protected static void deleteDirs(String filepath) throws IOException {
File f = new File(filepath);// 定义文件路径
if (f.exists()) {// 判断是否存在
if (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();// 删除目录
} 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()) {
deleteDirs(delFile[j].getAbsolutePath());// 递归调用delDirs方法并取得子目录路径
} else {
delFile[j].delete();// 删除文件
}
}
f.delete();// 删除目录
}
} else {
f.delete();// 删除文件
}
}
}
/**
* 直接过滤图片所有格式的
* 重命名文件里面的名称
* @param fileDir
* @param sequenceCode
*/
public static void fileRename(File fileDir, String sequenceCode) {
File[] files = fileDir.listFiles();
for (int k = 0; k < files.length; k++) {
StringBuffer sb = new StringBuffer(sequenceCode);
if (files[k].isDirectory()) {
fileRename(files[k], sequenceCode);
} else {
if (k < 10)
sb.append("_000").append(k);
else if (k >= 10 && k < 100)
sb.append("_00").append(k);
else if (k < 1000 && k >= 100)
sb.append("_0").append(k);
else
sb.append("_").append(k);
final int index = files[k].getName().lastIndexOf(".") + 1;
final String fileType = files[k].getName().substring(index);
sb.append(".").append(fileType);
final String name = sb.toString();
final File dirFile = new File(fileDir, name);
System.out.println("Rename File Path:"
+ files[k].getAbsolutePath());
files[k].renameTo(dirFile);
}
}
}
/**
* 根据后缀条件过滤
*
* @param fileDir
* @param sequenceCode
*/
public static void fileFilterRenames(File fileDir, String sequenceCode) {
File[] files = fileDir.listFiles(fileFilter);
for (int k = 0; k < files.length; k++) {
StringBuffer sb = new StringBuffer(sequenceCode);
if (files[k].isDirectory()) {
fileRename(files[k], sequenceCode);
} else {
if (k < 10)
sb.append("_000").append(k);
else if (k >= 10 && k < 100)
sb.append("_00").append(k);
else if (k < 1000 && k >= 100)
sb.append("_0").append(k);
else
sb.append("_").append(k);
final int index = files[k].getName().lastIndexOf(".") + 1;
final String fileType = files[k].getName().substring(index);
sb.append(".").append(fileType);
final String name = sb.toString();
final File dirFile = new File(fileDir, name);
System.out.println("重命名的文件: :" + files[k].getAbsolutePath());
files[k].renameTo(dirFile);
}
}
}
/**
* 读取文件里面的所有文件
*
* @param filePath
*/
public static void fileList(String filePath) {
File srcFile = new File(filePath);
boolean flag = srcFile.exists();
/**
* @flag判断文件是否存在
* @isDirectory测试此抽象路径名表示的文件是否是一个目录
* @canWrite测试应用程序是否可以读取此抽象路径名表示的文件
*/
if (!flag || !srcFile.isDirectory() || !srcFile.canRead()) {
try {
srcFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
} else {
File[] file = srcFile.listFiles();
for (int i = 0; i < file.length; i++) {
System.out.println(file[i].getAbsolutePath());
}
}
}
/**
* 以数组形式列出所有文件包括子类的文件
*
* @param path
*/
public static List findFiles(String path) {
try {
File file = new File(path);
File[] files = file.listFiles();
String[] filenames = file.list();
if (filenames == null)
return fileList;
for (int i = 0; i < filenames.length; i++) {
if (files[i].isFile()) {
fileList.add(files[i].getPath());
} else if (files[i].isDirectory()) {
findFiles(files[i].getPath());
}
}
} catch (Exception e) {
e.printStackTrace();
}
return fileList;
}
/**
* 压缩文件
* @param path压缩文件的路径
* @param toDir指定压缩文件到那个目录磁盘下
*/
public static void compressionZip(String path,String toDir) {
File f = new File(path);
try {
InputStream fis = new FileInputStream(f);
InputStream bis = new BufferedInputStream(fis);
byte[] buf = new byte[1024*1024];
int index= f.getName().lastIndexOf("\\")+1;
String fileName=f.getName().substring(index);
if(fileName.matches(".*\\.(?i)gif")){ //匹配gif格式文件
fileName=fileName.replaceAll(".gif", "");
}else if(fileName.matches(".*\\.(?i)java")){//匹配.java文件
fileName=fileName.replaceAll(".java", "");
}
int len;
OutputStream fos = new FileOutputStream(toDir+ fileName + ".zip");
BufferedOutputStream bos = new BufferedOutputStream(fos);
ZipOutputStream zos = new ZipOutputStream(bos);// 压缩包
ZipEntry ze = new ZipEntry(f.getName());// 这是压缩包名里的文件名
zos.putNextEntry(ze);// 写入新的 ZIP 文件条目并将流定位到条目数据的开始处
while ((len = bis.read(buf)) != -1) {
zos.write(buf, 0, len);
zos.flush();
}
bis.close();
zos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 解压zip文件
* @param path解压文件路径
* @param flag标识
*/
public static void decompressZip(String path,boolean flag)
{
int count = -1;
int index = -1;
String savePath = "";
savePath = path.substring(0, path.lastIndexOf("\\")) + "\\";
try
{
BufferedOutputStream bos = null;
ZipEntry entry = null;
InputStream fis = new FileInputStream(path);
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
while((entry = zis.getNextEntry()) != null)
{
byte data[] = new byte[byt];
String temp = entry.getName();
flag = fileFilter(temp);
if(!flag)
continue;
index = temp.lastIndexOf("/");
if(index > -1)
temp = temp.substring(index+1);
temp=savePath+temp;
File f = new File(temp);
if(!f.exists()){//不存在就创建一个新的文件
f.createNewFile();
//f.mkdirs();
}
OutputStream fos = new FileOutputStream(f);
bos = new BufferedOutputStream(fos, byt);
while((count = zis.read(data, 0, byt)) != -1)
{
bos.write(data, 0, count);
}
bos.flush();//flush缓冲区
fos.flush();
bos.close();
fos.close();
fis.close();
}
zis.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
*
* @param zip压缩文件文件路径
* @param zipName压缩文件里面的文件名称
* @param srcFiles多文件
* @throws IOException
*/
public static void ZipFiles(File zip, String zipName, File... srcFiles)
throws IOException {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zip));
ZipFiles(out, zipName, srcFiles);
out.close();
System.out.println("*****************压缩完毕*******************");
}
/**
* 压缩文件-File
*
* @param zipFile
* zip文件
* @param srcFiles
* 被压缩源文件
* @author isea533
*/
public static void ZipFiles(ZipOutputStream zis, String path,
File... srcFiles) {
path = path.replaceAll("\\*", "/");
if (!path.endsWith("/")) {
path += "/";
}
byte[] buf = new byte[1024];
try {
for (int i = 0; i < srcFiles.length; i++) {
if (srcFiles[i].isDirectory()) {
File[] files = srcFiles[i].listFiles();
String srcPath = srcFiles[i].getName();
srcPath = srcPath.replaceAll("\\*", "/");
if (!srcPath.endsWith("/")) {
srcPath += "/";
}
zis.putNextEntry(new ZipEntry(path + srcPath));
ZipFiles(zis, path + srcPath, files);
} else {
FileInputStream in = new FileInputStream(srcFiles[i]);
System.out.println(path + srcFiles[i].getName());
zis.putNextEntry(new ZipEntry(path
+ srcFiles[i].getName()));
int len;
while ((len = in.read(buf)) > 0) {
zis.write(buf, 0, len);
}
zis.closeEntry();
in.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
*
* @param zipPath
* @param descDir
* @throws IOException
*/
public static void unZipFiles(String zipPath, String descDir)
throws IOException {
unZipFiles(new File(zipPath), descDir);
}
/**
* 解压文件到指定目录
* @param zipFile
* @param descDir
* @author isea533
*/
public static void unZipFiles(File zipFile, String descDir)
throws IOException {
File pathFile = new File(descDir);
if (!pathFile.exists()) {
pathFile.mkdirs();
}
ZipFile zip = new ZipFile(zipFile);
for (Enumeration entries = zip.entries(); entries.hasMoreElements();) {
ZipEntry entry = (ZipEntry) entries.nextElement();
String zipEntryName = entry.getName();
InputStream in = zip.getInputStream(entry);
String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
// 判断路径是否存在,不存在则创建文件路径
File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
if (!file.exists()) {
file.mkdirs();
}
// 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
if (new File(outPath).isDirectory()) {
continue;
}
// 输出文件路径信息
System.out.println(outPath);
OutputStream out = new FileOutputStream(outPath);
byte[] buf1 = new byte[1024];
int len;
while ((len = in.read(buf1)) > 0) {
out.write(buf1, 0, len);
}
in.close();
out.close();
}
System.out.println("******************解压完毕********************");
}
/**
* 以数组形式存放图片,只拿jpg格式的
*
* @param dirName
* @return
*/
public static List readDirFiles(String dirName) {// dirName目录全路径
try {
File file = new File(dirName);
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
File tempFile = files[i];
if (tempFile.isDirectory()) {
String path = tempFile.getPath();
List list = readDirFiles(path);// 递归
for (int j = 0; j < list.size(); j++) {
fileList.add(list.get(j));
}
} else {
String fileName = tempFile.getName();
if (!tempFile.isFile()) {
continue;
}
// 判断是jpg格式的就添加进去
if (files[i].getName().endsWith(".gif")) {
fileList.add(tempFile);
}
}
if (i == (files.length - 1)) {
return fileList;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return fileList;
}
/**
* 创建文件并且拷贝文件
*
* @param dirFrom从那个文件里面拷贝
* @param dirTo拷贝到那个文件里面
*/
public static void copyFiles(File dirFrom, File dirTo) {
File[] files = dirFrom.listFiles();
for (File f : files) {
String tempFrom = f.getAbsolutePath();
String tempTo = tempFrom.replace(dirFrom.getAbsolutePath(), dirTo
.getAbsolutePath()); // 后面的路径 替换前面的路径名
if (f.isDirectory()) {
tempFile = new File(tempTo);
if (!tempFile.exists()) {
tempFile.mkdirs();
} else {
copyFiles(dirFrom, dirTo);
}
} else {
System.out.println("源文件:" + f.getAbsolutePath());
int index = tempTo.lastIndexOf("\\");// 找到"/"所在的位置
String mkdirPath = tempTo.substring(0, index);
tempFile = new File(mkdirPath);
if (!tempFile.exists()) {
tempFile.mkdirs();
} else {
System.out.println("目标点:" + tempTo);
readFiles(tempFrom, tempTo);
}
}
}
}
/**
* 拷贝方法
*
* @param from从那个路径
* @param to到那个路径
*/
public static void readFiles(String from, String to) {
try {
InputStream in = new FileInputStream(from);
OutputStream out = new FileOutputStream(to);
byte[] buff = new byte[1024 * 1024];
int len = 0;
while ((len = in.read(buff)) != -1) {
out.write(buff, 0, len);
}
in.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* xml格式化
* @param document
* @param filePath
* @return
*/
private static boolean format(Document document, String filePath) {
boolean ret=true;
OutputFormat format = OutputFormat.createPrettyPrint();// 格式
format.setEncoding("utf-8");// 设置格式编码
try {
/** 将document中的内容写入文件中new XMLWriter(new FileWriter(new File(filename))); */
XMLWriter writer = new XMLWriter(new FileWriter(new File(filePath)),format);
writer.write(document);
writer.close();
} catch (IOException e) {
e.printStackTrace();
ret=false;
}
return ret;
}
/**
* 文件处理
* @param content
* @param htmlPath
* @return
*/
public static boolean write(String content, String htmlPath) {
boolean flag = true;
try {
Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(htmlPath), "utf-8"));
out.write("\n" + content);
out.close();
} catch (Exception ex) {
ex.printStackTrace();
return false;
}
return flag;
}
/**
* 过滤器
*/
private static FileFilter fileFilter = new FileFilter() {
@Override
public boolean accept(File fileName) {
String f = fileName.getName();
if (f.endsWith(".png") || f.endsWith(".gif")) {
return true;
}
return false;
}
};
/**
* 文件过滤
* @param filName
* @return
*/
public static boolean fileFilter(String filName)
{
if(filName.endsWith(".jpg") || filName.endsWith(".gif") || filName.endsWith(".bmp") || filName.endsWith(".png"))
{
return false;
}else{
return true;
}
}
/***
* ==============================================路径的封装begin==========================================
*/
/**
* 获取当前工程路径
*
* @return
*/
public static String getSysPath() {
// String path =
// Thread.currentThread().getContextClassLoader().getResource("").toString();
String path = Thread.currentThread().getContextClassLoader().getResource(".").toString();
String temp = path.replaceFirst("file:/", "").replaceFirst("WEB-INF/classes/", "");
String separator = System.getProperty("file.separator");
String resultPath = temp.replaceAll("/", separator + separator);
return resultPath;
}
/**
* Thread.currentThread().getContextClassLoader().getResource("")
* 的getResource里面空串或者点或者是/输出的路径是一致 "" D:\Eclipse3.7\JTool\build\classes\ .
* D:\Eclipse3.7\JTool\build\classes\
* -/ D:\Eclipse3.7\JTool\build\classes\
*
* @return
*/
public static String getClassPath() {
// String path =
// Thread.currentThread().getContextClassLoader().getResource("").toString();
// String path
// =Thread.currentThread().getContextClassLoader().getResource(".").toString();
String path = Thread.currentThread().getContextClassLoader().getResource(".").toString();
String temp = path.replaceFirst("file:/", "");
String separator = System.getProperty("file.separator");
String resultPath = temp.replaceAll("/", separator + separator);
return resultPath;
}
/**
* getClassLoader().getResource()方法参数空串和点都是输出相同的路径唯有
* /是报空指针 "" D:\Eclipse3.7\JTool\build\classes\
* . D:\Eclipse3.7\JTool\build\classes\
* -/ 报空指针
*
* @return
*/
private String getClassesAbsolutePath() {
// 得到的是 项目的绝对路径
String path = this.getClass().getClassLoader().getResource("")
.getPath();
// String
// path=this.getClass().getClassLoader().getResource(".").getPath();
// String
// path=this.getClass().getClassLoader().getResource("/").getPath();//报空指针
String temp = path.replaceFirst("/", "");
String separator = System.getProperty("file.separator");
String resultPath = temp.replaceAll("/", separator + separator);
return resultPath;
}
/**
*得到的是当前类 文件的URI目录,不包括自己
* ""D:\Eclipse3.7\JTool\build\classes\javax\org\path\ .
* D:\Eclipse3.7\JTool\build\classes\javax\org\path\ - /
* D:\Eclipse3.7\JTool\build\classes\
* @return
*/
private String getCurrentClassPath() {
// String path=this.getClass().getResource("").getPath();
// String path=this.getClass().getResource(".").getPath();
String path = this.getClass().getResource("/").getPath();
String temp = path.replaceFirst("/", "");
String separator = System.getProperty("file.separator");
String resultPath = temp.replaceAll("/", separator + separator);
return resultPath;
}
public static String getPath(Class clazz) {
String path = clazz.getResource("").getPath();
return new File(path).getAbsolutePath();
}
public static String getPath(Object object) {
String path = object.getClass().getResource("").getPath();
return new File(path).getAbsolutePath();
}
public static String getRootClassPath() {
if (rootClassPath == null) {
try {
String path = IOUtil.class.getClassLoader().getResource("").toURI().getPath();
rootClassPath = new File(path).getAbsolutePath();
}
catch (Exception e) {
String path = IOUtil.class.getClassLoader().getResource("").getPath();
rootClassPath = new File(path).getAbsolutePath();
}
}
return rootClassPath;
}
public static String getPackagePath(Object object) {
Package p = object.getClass().getPackage();
return p != null ? p.getName().replaceAll("\\.", "/") : "";
}
public static File getFileFromJar(String file) {
throw new RuntimeException("Not finish. Do not use this method.");
}
public static String getWebRootPath() {
if (webRootPath == null)
webRootPath = detectWebRootPath();
return webRootPath;
}
public static void setWebRootPath(String webRootPath) {
if (webRootPath == null)
return ;
if (webRootPath.endsWith(File.separator))
webRootPath = webRootPath.substring(0, webRootPath.length() - 1);
IOUtil.webRootPath = webRootPath;
}
private static String detectWebRootPath() {
try {
String path = IOUtil.class.getResource("/").toURI().getPath();
return new File(path).getParentFile().getParentFile().getCanonicalPath();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/*
private static String detectWebRootPath() {
try {
String path = IO.class.getResource("/").getFile();
return new File(path).getParentFile().getParentFile().getCanonicalPath();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/**
* * ===========================================End==============================================
*/
/**
* ==============================================begin============================
* 加密文件
*
* @param f
* @param path
*/
private static String encryptFile(File f, String path) {
InputStream in = null;
OutputStream out = null;
String key = "";
try {
f = new File(path);
in = new FileInputStream(f);
out = new ByteArrayOutputStream();
// System.out.println(f.getAbsolutePath());
// System.out.println(f.length());
encoder.encodeBuffer(in, out);
key = out.toString();
in.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return key;
}
/**
*解密
* ByteArrayOutputStream
* InputStream
* OutputStream
* FileInputStream
* @param f
* @param path
*/
private static String decryptFile(File f, String path) {
InputStream in = null;
OutputStream out = null;
String key = "";
try {
f = new File(path);
in = new FileInputStream(f);
out = new ByteArrayOutputStream();
decoder.decodeBuffer(in, out);
key = out.toString();
in.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return key;
}
/**
* 加密
*
* @param key
* @return
* @throws Exception
*/
public static String encryptBASE64(String inputStr) {
String value = "";
try {
byte[] key = inputStr.getBytes();
value = encoder.encodeBuffer(key);
} catch (Exception e) {
e.printStackTrace();
}
return value;
}
/**
* 解密
*
* @param key
* @return
* @throws Exception
*/
public static String decryptBASE64(String outputStr) {
String value = "";
try {
byte[] key = decoder.decodeBuffer(outputStr);
value = new String(key);
} catch (Exception e) {
}
return value;
}
/**
* ================================end================================
*/
public static void main(String[] args) throws Exception {
String path1 = "D:/test/qq";
File fromFile = new File(path1);// 源文件夹
fileRename(fromFile, "I_");
/*
String path1 = "C:\\QQ\\1030927759\\Image";
String path2 = "d:\\t\\b";
String path3 = "d:\\t\\c";
File fromFile = new File(path1);// 源文件夹
File toFile = new File(path2);// 目标
compressionZip(path2+"\\a.gif","D:\\t\\");
// copyFiles(fromFile, toFile);
// fileFilterRenames(fromFile, "s");
//fileRename(fromFile, "f");
// deleteDirs(path1);
// fileList(path2);
* List list=readDirFiles(path2); for (Object object : list) {
* System.out.println("image:"+object); }
*
* List list=findFiles(path2); for (Iterator iterator = list.iterator();
* iterator.hasNext();) { Object object = (Object) iterator.next();
* System.out.println(object); }
// String key= encryptFile(fromFile, path1+"\\a.gif");
// System.err.println(key);
// System.err.println(decryptBASE64(key));
// System.out.println("文件大小"+fileSize(fromFile.length()));
String url = path1 + "\\AccessFile.java";
String inputStr = encryptBASE64(url);
// System.err.println("BASE64加密后:\n" + inputStr);
// System.err.println("BASE64解密后:\n" + decryptBASE64(inputStr));
boolean flag=false;
//decompressZip("D:\\t\\e.zip",flag);
*//**
* 压缩文件
*//*
File[] files = new File[]{new File("d:/t/a.txt"),new File("d:/t/a.xls")};
File zip = new File("d:/t/压缩.zip");
ZipFiles(zip,"ZipFiles",files);
*//**
* 解压文件
*//*
File zipFile = new File("d:/t/压缩.zip");
String path = "d:/";
//unZipFiles(zipFile, path);
*/
//String separator=f.separator;//与系统有关的默认名称分隔符，为了方便，它被表示为一个字符串
String path = "D:/test/a.txt";
//String text = reader1(path);
//writer1(path, "D:/test/a1.txt");
//writer2(path, "D:/test/c.txt");
//writer3(path, "D:/test/d.txt");
//writer4(path, "D:/test/d.txt");
//char c=reader2(path);
//System.out.print(c);
//String text=reader2(path);
//System.out.println(text);
//writer5(path,"d:/test/f.txt");
//writer6(path,"d:/test/e.txt");
String s=reader3(path);
System.out.println(s);
}
}
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