java文件操作

package com.wnk.fitvogue.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
* 文件操作
*
* @author liuxm
*
*/
public class HandleFileUtil {
/**
* 说明：复制文件
*
* @param srcFile
* @param detFile
* @throws IOException
*/

public static void copyFile(File srcFile, File detFile) throws IOException {
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(
srcFile));
BufferedOutputStream bos = new BufferedOutputStream(
new FileOutputStream(detFile));
int b = 0;
while ((b = bis.read()) != -1) {
bos.write(b);
}
bis.close();
bos.close();
}
/**
*
* @Enclosing_Method: readFile
* @Description: 一次读一个字节读文件
* @Written by: liuxmi
* @Creation Date: Jul 14, 2010 3:56:47 AM
* @version: v1.00
* @param srcFile
* @return
* @throws IOException
* @return String
*
*/
public static String readFile(String fileName) throws IOException {
File srcFile = new File(fileName);
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(
srcFile));
StringBuilder context = new StringBuilder();
int b = 0;
while ((b = bis.read()) != -1) {
context.append(b);
System.out.println(b);
}
bis.close();
return context.toString();
}

/**
*
* @Enclosing_Method: readFileForList
* @Description: 读取十六进制文件
* @Written by: liuxmi
* @Creation Date: Jul 19, 2010 6:23:50 AM
* @version: v1.00
* @param fileName
* @return
* @throws IOException
* @return String
*
*/
public static String readHexFile(String fileName) throws IOException {
InputStream is = new FileInputStream(fileName);
byte[] b = new byte[is.available()];
is.read(b);
is.close();
return byte2hex(b);
}
public static String byte2hex(byte[] b) {
String hs = "";
String stmp = "";
for (int n = 0; n < b.length; n++) {
stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
if (stmp.length() == 1) {
hs = hs + "0" + stmp;
} else {
hs = hs + stmp;
}
}
return hs.toUpperCase();
}
/**
*
* @Enclosing_Method: readFileByLines
* @Description: 以行为单位读取文件，常用于读面向行的格式化文件
* @Written by: liuxmi
* @Creation Date: Jul 14, 2010 3:57:18 AM
* @version: v1.00
* @param fileName 文件名
* @return void
*
*/
public static String readFileByLines(String fileName) {
File file = new File(fileName);
BufferedReader reader = null;
StringBuilder context = new StringBuilder();
try {
System.out.println(" 以行为单位读取文件内容，一次读一整行：");
reader = new BufferedReader(new FileReader(file));
String tempString = null;
int line = 1;
// 一次读入一行，直到读入null为文件结束
while ((tempString = reader.readLine()) != null) {
// 显示行号
context.append(tempString);
line++;
}
reader.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
}
}
}
return context.toString();
}

}