java 之 classpath下文件路径

import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;


public class ClassPathTest {

/**
 * @param args
 * @throws Exception 
 */
public static void main(String[] args) throws Exception {
//找得到
 File file = new File("bin/com/ethan/test/readme.txt");
 String path = file.getAbsolutePath();
 System.out.println(file.getAbsolutePath());

// FileInputStream fis = new FileInputStream(new File(path));
// InputStream is =  ClassPathTest.class.getClassLoader().getResourceAsStream("com/ethan/test/readme.txt");

 //DataOutputStream 先writeUTF写入内容和内容长度，才可以用readUTF读出来。
InputStream is =  ClassPathTest.class.getResourceAsStream("com/ethan/test/readme.txt");
 DataInputStream dis = new DataInputStream(is);
 byte[] buf = new byte[4096];
 int len = dis.read(buf);
 System.out.println(new String(buf,0,len));
 is.close();
}

}