资料的相关操作 转转转
文件的相关操作 转转转
package com.Utils;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Random;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class FileUtils {
private static Log log = LogFactory.getLog(FileUtils.class);
private FileUtils() {}
/**
* 获取随机的文件名称
* @param seed 随机种子
* @return
*/
public static String getRandomFileName(String seed) {
byte[] ra = new byte[100];
new Random().nextBytes(ra);
StringBuilder build = new StringBuilder("");
for (int i = 0; i < ra.length; i++) {
build.append(Byte.valueOf(ra[i]).toString());
}
String currentDate = Long.valueOf(new Date().getTime()).toString();
seed = seed + currentDate + build.toString();
return MD5.encode((seed).toLowerCase());
}
/**
* 列出所有当前层的文件和目录
*
* @param dir 目录名称
* @return fileList 列出的文件和目录
*/
public static File[] ls(String dir) {
return new File(dir).listFiles();
}
/**
* 根据需要创建文件夹
*
* @param dirPath 文件夹路径
* @param del 存在文件夹是否删除 false 不创建文件夹..
*/
public static boolean mkdir(String dirPath,boolean del) {
boolean rs = false;
File dir = new File(dirPath);
//判断文件夹是否存在..
if(dir.exists()) {
if(del){
dir.delete();
}else{
return false;
}
}
dir.mkdirs();
return true;
}
/**
* 删除文件和目录
*
* @param path
* @throws Exception
*/
public static void rm(String path) throws Exception{
if(log.isDebugEnabled())
log.debug("需要删除的文件: " + path);
File file = new File(path);
//判断文件是否存在,,不存在不用删除
if(!file.exists()) {
if(log.isWarnEnabled())
log.warn("文件<" + path + ">不存在");
return;
}
//判断这个文件是否是一个文件夹..
if(file.isDirectory()) {
//是一个文件夹....
//listFiles()把所有文件夹下内容列..
File[] fileList = file.listFiles();
if(fileList == null || fileList.length == 0) {
//如果文件夹空，直接删除..
file.delete();
} else {
//如果文件夹不空，把内容一个一个取出来，迭归判断...
//自己调用自己迭归..
for (File _file : fileList) {
//把文件 内容绝对地址
rm(_file.getAbsolutePath());
}
}
file.delete();
} else {
//如果你删除的是一个文件..
file.delete();
}
}
/**
* 移动文件
*
* @param source 源文件
* @param target 目标文件
* @param cache 文件缓存大小
* @throws Exception
*/
public static void mv(String source,String target,int cache) throws Exception {
if(source.trim().equals(target.trim()))
return;
byte[] cached = new byte[cache];
FileInputStream fromFile = new FileInputStream(source);
FileOutputStream toFile = new FileOutputStream(target);
while(fromFile.read(cached) != -1) {
toFile.write(cached);
}
toFile.flush();
toFile.close();
fromFile.close();
new File(source).deleteOnExit();
}
/**
* 文件复制
* @param source
* @param target
*/
public static void cp(String source,String target){
FileInputStream fin = null;
FileOutputStream fout = null;
//提升性能用一个数组;
byte[] cache = new byte[1024 * 8];
try {
fin = new FileInputStream(source);
fout = new FileOutputStream(target);
int size = fin.read(cache);
while(size != -1){
fout.write(cache, 0, size);
size = fin.read(cache);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
if(fout != null){
try {
fout.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(fin != null){
try {
fin.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* 把属性文件转换成Map
*
* @param propertiesFile
* @return
* @throws Exception
*/
public static final Map<String, String> getPropertiesMap(String propertiesFile) throws Exception{
Properties properties = new Properties();
FileInputStream inputStream = new FileInputStream(propertiesFile);
properties.load(inputStream);
Map<String, String> map = new HashMap<String, String>();
Set<Object> keySet = properties.keySet();
for (Object key : keySet) {
map.put((String)key, properties.getProperty((String)key));
}
return map;
}
@SuppressWarnings("unchecked")
public static final Map<String, String> getPropertiesMap(Class clazz,String fileName) throws Exception{
Properties properties = new Properties();
InputStream inputStream = clazz.getResourceAsStream(fileName);
if(inputStream == null)
inputStream = clazz.getClassLoader().getResourceAsStream(fileName);
properties.load(inputStream);
Map<String, String> map = new HashMap<String, String>();
Set<Object> keySet = properties.keySet();
for (Object key : keySet) {
map.put((String)key, properties.getProperty((String)key));
}
return map;
}
/**
* 把属性文件转换成Map
*
* @param inputStream
* @return
* @throws Exception
*/
public static final Map<String, String> getPropertiesMap(InputStream inputStream) throws Exception{
Properties properties = new Properties();
properties.load(inputStream);
Map<String, String> map = new HashMap<String, String>();
Set<Object> keySet = properties.keySet();
for (Object key : keySet) {
map.put((String)key, properties.getProperty((String)key));
}
return map;
}
/**
* 把文本文件转换成String
*
* @param fullPath
* @return
* @throws Exception
*/
public static String readFile(String fullPath) throws Exception{
BufferedReader reader = new BufferedReader(new FileReader(fullPath));
if(reader == null)
return null;
StringBuilder builder = new StringBuilder("");
String line = null;
while((line = reader.readLine()) != null) {
builder.append(line + "\n");
}
return builder.toString();
}
/**
* 获取资源文件流
*
* @param clazz
* @param name
* @return
*/
@SuppressWarnings("unchecked")
public static InputStream getResourceAsStream(Class clazz,String name) {
try {
InputStream inputStream = clazz.getResourceAsStream(name);
if(inputStream == null)
inputStream = clazz.getClassLoader().getResourceAsStream(name);
return inputStream;
} catch (Exception e) {
if(log.isWarnEnabled())
log.warn("获取资源文件失败", e);
return null;
}
}
/**
* 文件重命名
* @param path
* @param oldname
* @param newname
*/
public static void renameFile(String path,String oldname,String newname){
if(!oldname.equals(newname)){//新的文件名和以前文件名不同时,才有必要进行重命名
File oldfile=new File(path+"/"+oldname);
File newfile=new File(path+"/"+newname);
if(newfile.exists())//若在该目录下已经有一个文件和新文件名相同，则不允许重命名
System.out.println(newname+"已经存在！");
else{
oldfile.renameTo(newfile);
}
}
}
//
public static void main(String[] args){
// File [] lists = ls(".");
// for(File f:lists){
// System.out.println(f.getName());
// }
//boolean is = mkdir("a",false);
//System.out.println(is);
// try{
// rm("a");
// }catch(Exception e){
// e.printStackTrace();
// }
// try{
// long start = System.currentTimeMillis();
// mv("f://AdbeRdr920_zh_CN.exe","e://c.exe",1024 *
;
// long end = System.currentTimeMillis();
// System.out.println(end - start);
// }catch(Exception e){
// e.printStackTrace();
// }
}
}
package com.Utils;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Random;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class FileUtils {
private static Log log = LogFactory.getLog(FileUtils.class);
private FileUtils() {}
/**
* 获取随机的文件名称
* @param seed 随机种子
* @return
*/
public static String getRandomFileName(String seed) {
byte[] ra = new byte[100];
new Random().nextBytes(ra);
StringBuilder build = new StringBuilder("");
for (int i = 0; i < ra.length; i++) {
build.append(Byte.valueOf(ra[i]).toString());
}
String currentDate = Long.valueOf(new Date().getTime()).toString();
seed = seed + currentDate + build.toString();
return MD5.encode((seed).toLowerCase());
}
/**
* 列出所有当前层的文件和目录
*
* @param dir 目录名称
* @return fileList 列出的文件和目录
*/
public static File[] ls(String dir) {
return new File(dir).listFiles();
}
/**
* 根据需要创建文件夹
*
* @param dirPath 文件夹路径
* @param del 存在文件夹是否删除 false 不创建文件夹..
*/
public static boolean mkdir(String dirPath,boolean del) {
boolean rs = false;
File dir = new File(dirPath);
//判断文件夹是否存在..
if(dir.exists()) {
if(del){
dir.delete();
}else{
return false;
}
}
dir.mkdirs();
return true;
}
/**
* 删除文件和目录
*
* @param path
* @throws Exception
*/
public static void rm(String path) throws Exception{
if(log.isDebugEnabled())
log.debug("需要删除的文件: " + path);
File file = new File(path);
//判断文件是否存在,,不存在不用删除
if(!file.exists()) {
if(log.isWarnEnabled())
log.warn("文件<" + path + ">不存在");
return;
}
//判断这个文件是否是一个文件夹..
if(file.isDirectory()) {
//是一个文件夹....
//listFiles()把所有文件夹下内容列..
File[] fileList = file.listFiles();
if(fileList == null || fileList.length == 0) {
//如果文件夹空，直接删除..
file.delete();
} else {
//如果文件夹不空，把内容一个一个取出来，迭归判断...
//自己调用自己迭归..
for (File _file : fileList) {
//把文件 内容绝对地址
rm(_file.getAbsolutePath());
}
}
file.delete();
} else {
//如果你删除的是一个文件..
file.delete();
}
}
/**
* 移动文件
*
* @param source 源文件
* @param target 目标文件
* @param cache 文件缓存大小
* @throws Exception
*/
public static void mv(String source,String target,int cache) throws Exception {
if(source.trim().equals(target.trim()))
return;
byte[] cached = new byte[cache];
FileInputStream fromFile = new FileInputStream(source);
FileOutputStream toFile = new FileOutputStream(target);
while(fromFile.read(cached) != -1) {
toFile.write(cached);
}
toFile.flush();
toFile.close();
fromFile.close();
new File(source).deleteOnExit();
}
/**
* 文件复制
* @param source
* @param target
*/
public static void cp(String source,String target){
FileInputStream fin = null;
FileOutputStream fout = null;
//提升性能用一个数组;
byte[] cache = new byte[1024 * 8];
try {
fin = new FileInputStream(source);
fout = new FileOutputStream(target);
int size = fin.read(cache);
while(size != -1){
fout.write(cache, 0, size);
size = fin.read(cache);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
if(fout != null){
try {
fout.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(fin != null){
try {
fin.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* 把属性文件转换成Map
*
* @param propertiesFile
* @return
* @throws Exception
*/
public static final Map<String, String> getPropertiesMap(String propertiesFile) throws Exception{
Properties properties = new Properties();
FileInputStream inputStream = new FileInputStream(propertiesFile);
properties.load(inputStream);
Map<String, String> map = new HashMap<String, String>();
Set<Object> keySet = properties.keySet();
for (Object key : keySet) {
map.put((String)key, properties.getProperty((String)key));
}
return map;
}
@SuppressWarnings("unchecked")
public static final Map<String, String> getPropertiesMap(Class clazz,String fileName) throws Exception{
Properties properties = new Properties();
InputStream inputStream = clazz.getResourceAsStream(fileName);
if(inputStream == null)
inputStream = clazz.getClassLoader().getResourceAsStream(fileName);
properties.load(inputStream);
Map<String, String> map = new HashMap<String, String>();
Set<Object> keySet = properties.keySet();
for (Object key : keySet) {
map.put((String)key, properties.getProperty((String)key));
}
return map;
}
/**
* 把属性文件转换成Map
*
* @param inputStream
* @return
* @throws Exception
*/
public static final Map<String, String> getPropertiesMap(InputStream inputStream) throws Exception{
Properties properties = new Properties();
properties.load(inputStream);
Map<String, String> map = new HashMap<String, String>();
Set<Object> keySet = properties.keySet();
for (Object key : keySet) {
map.put((String)key, properties.getProperty((String)key));
}
return map;
}
/**
* 把文本文件转换成String
*
* @param fullPath
* @return
* @throws Exception
*/
public static String readFile(String fullPath) throws Exception{
BufferedReader reader = new BufferedReader(new FileReader(fullPath));
if(reader == null)
return null;
StringBuilder builder = new StringBuilder("");
String line = null;
while((line = reader.readLine()) != null) {
builder.append(line + "\n");
}
return builder.toString();
}
/**
* 获取资源文件流
*
* @param clazz
* @param name
* @return
*/
@SuppressWarnings("unchecked")
public static InputStream getResourceAsStream(Class clazz,String name) {
try {
InputStream inputStream = clazz.getResourceAsStream(name);
if(inputStream == null)
inputStream = clazz.getClassLoader().getResourceAsStream(name);
return inputStream;
} catch (Exception e) {
if(log.isWarnEnabled())
log.warn("获取资源文件失败", e);
return null;
}
}
/**
* 文件重命名
* @param path
* @param oldname
* @param newname
*/
public static void renameFile(String path,String oldname,String newname){
if(!oldname.equals(newname)){//新的文件名和以前文件名不同时,才有必要进行重命名
File oldfile=new File(path+"/"+oldname);
File newfile=new File(path+"/"+newname);
if(newfile.exists())//若在该目录下已经有一个文件和新文件名相同，则不允许重命名
System.out.println(newname+"已经存在！");
else{
oldfile.renameTo(newfile);
}
}
}
//
public static void main(String[] args){
// File [] lists = ls(".");
// for(File f:lists){
// System.out.println(f.getName());
// }
//boolean is = mkdir("a",false);
//System.out.println(is);
// try{
// rm("a");
// }catch(Exception e){
// e.printStackTrace();
// }
// try{
// long start = System.currentTimeMillis();
// mv("f://AdbeRdr920_zh_CN.exe","e://c.exe",1024 *
// long end = System.currentTimeMillis();
// System.out.println(end - start);
// }catch(Exception e){
// e.printStackTrace();
// }
}
}