java輸入/輸出（io）記錄

 

分類	字節輸入流	字節輸出流	字符輸入流	字符輸出流
抽象基類	InputStream	OutputStream	Reader	Writer
訪問文件	FileInputStream	FileOutputStream	FileReader	FileWriter
訪問數組	ByteArrayInputStream	ByteArrayOutputStream	CharArrayReader	CharArrayWriter
訪問管道	PipedInputStream	PipedOutputStream	PipedReader	PipedWriter
訪問字符串			StringReader	StringWriter
緩衝流	BufferedInputStream	BufferedOutputStream	BufferedReader	BufferedWriter
轉換流			InputStreamReader	OutputStreamWriter
對象流	ObjectInputStream	ObjectOutputStream
抽象基類	FilterInputStream	FilterOutputStream	FilterReader	FilterWriter
打印流		PrintStream		PrintWriter
推回輸入流	PushbackInputStream		PushbackReader
特殊流	DataInputStream	DataOutputStream

(斜體爲抽象類，藍色粗體爲節點流，紅色爲處理流)

I/O不熟悉知識點：

File類

文件過濾器

import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import static java.lang.System.out;

/**
 * ClassName:FilefilterTest
 */
public class FilefilterTest {

public static void main(String[] args) throws IOException {
//新建一個路徑
File filePath = new File("C:/DOCUME~1/Temp");
if(filePath.isDirectory()) {
//調用自定義過濾器
String[] files = filePath.list(new FileFilter());
for(String fileName : files) {
out.println(fileName);
}
}

}
}
/**
 * ClassName:FileFilter
 */
class FileFilter implements FilenameFilter {
@Override
public boolean accept(File dir, String name) {
//設定自定義過濾器的條件 過濾全部非dir路徑下的java文件和文件夾
return name.endsWith(".java") || new File(dir+File.separator+name).isDirectory();
}
}