1、String与InputStream转换

(1)String -> InputStream

1. String   str   =   "hello world"; 
2. InputStream   inputStream   =   new   ByteArrayInputStream(str.getBytes()); 

(2)InputStream -> String

1. byte   b;  
2. ByteArrayOutputStream   baos   =   new   ByteArrayOutputStream();  
3. while((b=inpputstrea.read())!=-1){  
4.         baos.write(b);  
5. }  
6. return   baos.toString();