最近用到 String與InputStream相互轉換  總結一下

1.String to InputStream

String str = "String   to InputStream";

InputStream   in_withcode   =   new   ByteArrayInputStream(str.getBytes("UTF-8"));

2.InputStream to String

    這裡提供幾個方法。

public String convertStreamToString(InputStream is) {   

   BufferedReader reader = new BufferedReader(new InputStreamReader(is));   

        StringBuilder sb = new StringBuilder();   

    

        String line = null;   

        try {   

            while ((line = reader.readLine()) != null) {   

                sb.append(line + "/n");   

            }   

        } catch (IOException e) {   

            e.printStackTrace();   

        } finally {   

            try {   

                is.close();   

            } catch (IOException e) {   

                e.printStackTrace();   

            }   

        }   

    

        return sb.toString();   

    }    
 

or

    public String getStrFromInputSteam(InputSteam in){  
         BufferedReader bf=new BufferedReader(new InputStreamReader(in,"UTF-8"));  
         //最好在將位元組流轉換為字元流的時候 進行轉碼  
         StringBuffer buffer=new StringBuffer();  
         String line="";  
         while((line=bf.readLine())!=null){  
             buffer.append(line);  
         }  
           
        return buffer.toString();  
    }  
 

方法2：

public   String   inputStream2String   (InputStream   in)   throws   IOException   {
        StringBuffer   out   =   new   StringBuffer();
        byte[]   b   =   new   byte[4096];
        for   (int   n;   (n   =   in.read(b))   !=   -1;)   {
                out.append(new   String(b,   0,   n));
        }
        return   out.toString();
} 
 

public   static   String   inputStream2String(InputStream   is)   throws   IOException{
        ByteArrayOutputStream   baos   =   new   ByteArrayOutputStream();
        int   i=-1;
        while((i=is.read())!=-1){
        baos.write(i);
        }
       return   baos.toString();
}