java输入/输出（io）记录

 

分类	字节输入流	字节输出流	字符输入流	字符输出流
抽象基类	InputStream	OutputStream	Reader	Writer
访问文件	FileInputStream	FileOutputStream	FileReader	FileWriter
访问数组	ByteArrayInputStream	ByteArrayOutputStream	CharArrayReader	CharArrayWriter
访问管道	PipedInputStream	PipedOutputStream	PipedReader	PipedWriter
访问字符串			StringReader	StringWriter
缓冲流	BufferedInputStream	BufferedOutputStream	BufferedReader	BufferedWriter
转换流			InputStreamReader	OutputStreamWriter
对象流	ObjectInputStream	ObjectOutputStream
抽象基类	FilterInputStream	FilterOutputStream	FilterReader	FilterWriter
打印流		PrintStream		PrintWriter
推回输入流	PushbackInputStream		PushbackReader
特殊流	DataInputStream	DataOutputStream

(斜体为抽象类，蓝色粗体为节点流，红色为处理流)

I/O不熟悉知识点：

File类

文件过滤器

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 {
//新建一个路径
File filePath = new File("C:/DOCUME~1/Temp");
if(filePath.isDirectory()) {
//调用自定义过滤器
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) {
//设定自定义过滤器的条件 过滤全部非dir路径下的java文件和文件夹
return name.endsWith(".java") || new File(dir+File.separator+name).isDirectory();
}
}