String 、InputStream、Reader 之间的转换

最新推荐文章于 2024-05-24 12:32:33 发布

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本文介绍了Java中字符串与输入输出流之间的相互转换方法。包括String到InputStream、ByteArrayInputStream的转换，InputStream到String的转换，Reader到StringBuffer的转换以及String到Reader(StringReader)的转换。这些方法适用于不同的应用场景。

1、String –> InputStream
InputStream is = new ByteArrayInputStream(str.getBytes());
or
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
StringReader stringReader = new StringReader(s);