[英]Write String with array as bytes to a file using DataOutputStream
[英]DataOutputStream to Array
有什么方法可以將DataOutputStream內容寫入Array
或String
無論它包含哪種數據類型?
DataOutputStream output = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(String dataPath)));
謝謝
使用ByteArrrayOutputStream。
https://docs.oracle.com/javase/7/docs/api/java/io/ByteArrayOutputStream.html
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream os = new DataOutputStream(baos);
os.write(...);
byte[] data = baos.toByteArray();
String dataAsString = new String(data, "UTF-8"); // or whatever encoding you are using
您也可以使用以下策略:
class CompositeOutputStream implements OutputStream {
private OutputStream first,second;
public CompositeOutputStream(OutputStream first, OutputStream second) {
this.first = first;
this.second=second;
}
public void write(int b) throws IOException {
first.write(b);
second.write(b);
}
// etc.
}
用於:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream os = new CompositeOutputStream(new DataOutputStream(...), baos);
os.write(...);
byte[] data = baos.toByteArray();
String dataAsString = new String(data, "UTF-8"); // or whatever encoding you are using
// etc.
“寶”只是原始DataOutputStream中寫入內容的“鏡像”
您仍然需要正確處理異常,並注意寫入的數據量(將所有內容保存在內存中可能會導致內存不足)等。
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