java常用string inputStream转换

1、String –> InputStream

 

InputStrem is = new ByteArrayInputStream(str.getBytes());或者ByteArrayInputStream stream= new ByteArrayInputStream(str.getBytes());

 

 2、InputStream–>String

 

inputStream input;StringBuffer out = new StringBuffer();     byte[] b = new byte[4096];     for (int n; (n = input.read(b)) != -1;) {          out.append(new String(b, 0, n));     }out.toString();

 

3、Reader –>String

 

BufferedReader in = new BufferedReader(new InputStreamReader(is));StringBuffer buffer = new StringBuffer();String line = " ";while ((line = in.readLine()) != null){     buffer.append(line);}return buffer.toString();

 

4、String–>Reader

 

Reader reader = null;BufferedReader r = new BufferedReader(reader);StringBuilder b = new StringBuilder();String line;while((line=r.readLine())!=null) {     b.append(line);     b.append(“\r\n”);}b.toString();