Java 中获取输入流时，有时候须要将输入流转成String,以便获取当中的内容 ，以下总结一下 InputStream 转成String 的方式
方法1：
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();
}
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();
}
方法3：
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();
}
String 转成 InputStream
String str = "String与InputStream相互转换";
InputStream in_nocode = new ByteArrayInputStream(str.getBytes());
InputStream in_withcode = new ByteArrayInputStream(str.getBytes("UTF-8"));