从InputStream到String_写成函数

String result = readFromInputStream(inputStream);//调用处
//将输入流InputStream变为String
    public String readFromInputStream(InputStream in) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len = -1;
        while ((len = in.read(buffer)) != -1) {
            baos.write(buffer, 0, len);
        }
        baos.close();
        in.close();
        
        byte[] lens = baos.toByteArray();
        String result = new String(lens,"UTF-8");//内容乱码处理
        
        return result;
    
    }