IO流：异常Underlying input stream returned zero bytes

Underlying input stream returned zero bytes：

 

1.//方法一 【抛出异常java.io.IOException : underlying input stream returned zero bytes】 
2.String line = null; 
3.while ((line=br.readLine()) != null) { 
4.System.out.println("line = "+line); 
5.} 
6.
7.//方法二 【打印结果为b=0 b=0】 
8.ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
9.int ch; 
10.while((ch=inputStream.read()) != -1){ 
11.bos.write(ch); 
12.} 
13.byte[] bt = bos.toByteArray(); 
14.bos.close(); 
15.for(byte b : bt){ 
16.System.out.print("b="+ b +"\t"); 
17.} 

 网上一种解决方法：

 

1.BufferedReader inStream = new BufferedReader(new InputStreamReader(inputStream));  
2.  
3.byte ch = 0;  
4.  
5.char myChar;  
6.  
7.int charVal;  
8.  
9.try{  
10.  
11.while((ch = (byte)inStream.read()) != -1){  
12.  
13.if((ch == 13) || (ch == 10)){ //In ASCII code: 13 = Carriage return, 10 = line feed. When the GPS receiver sends those characters, the while loop must be broken to avoid an IOException  
14.  
15.break;  
16.  
17.}else{  
18.  
19.myChar = (char)ch;  
20.  
21.charVal = myChar;  
22.  
23.//System.out.print("byte=" + ch +" myChar=" + myChar + " charVal=" + charVal + "\n");  
24.  
25.System.out.print(myChar);  
26.  
27.}  
28.  
29.}