StreamTool.java

package com.jqyd.utils;
import java.io.ByteArrayOutputStream;  
import java.io.File;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.PushbackInputStream;  
  
public class StreamTool {  
       
     public static void save(File file, byte[] data) throws Exception {  
         FileOutputStream outStream = new FileOutputStream(file);  
         outStream.write(data);  
         outStream.close();  
     }  
       
     public static String readLine(PushbackInputStream in) throws IOException {  
            char buf[] = new char[128];  
            int room = buf.length;  
            int offset = 0;  
            int c;  
loop:       while (true) {  
                switch (c = in.read()) {  
                    case -1:  
                    case '\n':  
                        break loop;  
                    case '\r':  
                        int c2 = in.read();  
                        if ((c2 != '\n') && (c2 != -1)) in.unread(c2);  
                        break loop;  
                    default:  
                        if (--room < 0) {  
                            char[] lineBuffer = buf;  
                            buf = new char[offset + 128];  
                            room = buf.length - offset - 1;  
                            System.arraycopy(lineBuffer, 0, buf, 0, offset);  
                             
                        }  
                        buf[offset++] = (char) c;  
                        break;  
                }  
            }  
            if ((c == -1) && (offset == 0)) return null;  
            return String.copyValueOf(buf, 0, offset);  
    }  
       
    /** 
    * 读取流 
    * @param inStream 
    * @return 字节数组 
    * @throws Exception 
    */  
    public static byte[] readStream(InputStream inStream) throws Exception{  
            ByteArrayOutputStream outSteam = new ByteArrayOutputStream();  
            byte[] buffer = new byte[1024];  
            int len = -1;  
            while( (len=inStream.read(buffer)) != -1){  
                outSteam.write(buffer, 0, len);  
            }  
            outSteam.close();  
            inStream.close();  
            return outSteam.toByteArray();  
    }  
}