java 7 使用java.nio.file.*操作文件

java7中辅助类Files新增了两个方法用于读去文件的全部行和全部字节。So..再也不用缓冲区了。

package java8_test;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;

public class TestMain {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
            Path logFile=Paths.get("/home/frank/java8" );
            List<String> lines;
            try {
                lines = Files.readAllLines(logFile);
                for(String str:lines){
                    System.out.println(str);
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
    }
        

}

该类也与以前的java I/O代码兼容

try {
            Path logFile=Paths.get("/home/frank/java8" );
            BufferedReader reader=Files.newBufferedReader(logFile);
            String line;
            while((line=reader.readLine()) != null){
                System.out.println(line);
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }