www.pudn.com > DestTest.rar > Base64Helper.java

package com.des.test; 
 
/* 
 * @author CuCuChen 
 *  
 * @version $Id$ 
 *  
 */  
 
import java.io.*;  
 
class Base64Helper {  
 
// 从文本文件对象中读取内容并转换为字符数组 
 
public static char[] readChars(File file)  
 
{  
 
     CharArrayWriter caw = new CharArrayWriter();  
 
     try  
 
     {  
 
         Reader fr = new FileReader(file);  
 
        Reader in = new BufferedReader(fr);  
 
         int count = 0;  
 
         char[] buf = new char[16384];  
 
        while ((count=in.read(buf)) != -1) {  
 
             if (count > 0) caw.write(buf, 0, count);  
 
         }  
 
         in.close();  
 
     }  
 
     catch (Exception e) { e.printStackTrace(); }  
 
     return caw.toCharArray();  
 
}  
 
// 从字符串对象中读取内容并转换为字符数组 
 
public static char[] readChars(String string)  
 
{  
 
     CharArrayWriter caw = new CharArrayWriter();  
 
     try  
 
     {  
 
         Reader sr = new StringReader(string.trim());  
 
        Reader in = new BufferedReader(sr);  
 
         int count = 0;  
 
         char[] buf = new char[16384];  
 
        while ((count=in.read(buf)) != -1) {  
 
             if (count > 0) caw.write(buf, 0, count);  
 
         }  
 
         in.close();  
 
     }  
 
     catch (Exception e) { e.printStackTrace(); }  
 
     return caw.toCharArray();  
 
}  
 
// 从二进制文件对象中读取内容并转换为字节数组 
 
public static byte[] readBytes(File file)  
 
{  
 
     ByteArrayOutputStream baos = new ByteArrayOutputStream();  
 
     try  
 
     {  
 
         InputStream fis = new FileInputStream(file);  
 
         InputStream is = new BufferedInputStream(fis);  
 
        int count = 0;  
 
         byte[] buf = new byte[16384];  
 
         while ((count=is.read(buf)) != -1) {  
 
             if (count > 0) baos.write(buf, 0, count);  
 
         }  
 
         is.close();  
 
    }  
 
     catch (Exception e) { e.printStackTrace(); }  
 
     return baos.toByteArray();  
 
}  
 
// 写字节数组内容到二进制文件 
 
public static void writeBytes(File file, byte[] data) {  
 
     try {  
 
         OutputStream fos = new FileOutputStream(file);  
 
         OutputStream os = new BufferedOutputStream(fos);  
 
         os.write(data);  
 
         os.close();  
 
     }  
 
     catch (Exception e) { e.printStackTrace(); }  
 
}  
 
// 写字符数组内容到文本文件 
 
public static void writeChars(File file, char[] data) {  
 
     try {  
 
         Writer fos = new FileWriter(file);  
 
         Writer os = new BufferedWriter(fos);  
 
        os.write(data);  
 
         os.close();  
 
     }  
 
     catch (Exception e) { e.printStackTrace(); }  
 
}  
 
}