学步园

import java.nio.file.Paths; 
import java.nio.file.Path;
public class Test{
  public static void main(String args[]){
    Path path = Paths.get("C:\\home\\joe\\foo");    // Microsoft Windows syntax    
    //Path path = Paths.get("/home/joe/foo");    // Solaris syntax   
     System.out.println("path.toString()--"+path.toString());     
    System.out.println("path.getName(1)--"+path.getName(1));       
    System.out.println(path.getName(0));     
    System.out.println(path.getNameCount());     
    System.out.println(path.subpath(0,2));     
    System.out.println(path.getParent());     
    System.out.println(path.getRoot());     
    }
}

运行:
C:\ex>java Test
path.toString()--C:\home\joe\foo
path.getName(1)--joe
getName(0): home
getNameCount: 3
home\joe
getParent: C:\home\joe
getRoot: C:\

//java7新特性IO操作Path 
  
import java.io.BufferedReader;  
import java.io.File;  
import java.io.IOException;  
import java.nio.charset.Charset;  
import java.nio.file.FileSystems;  
import java.nio.file.Files;  
import java.nio.file.Path;  
import java.nio.file.Paths;  
/** 
 * Path是java1.7的nio.file包中的文件 
 * 操作的重要切入点，作为基础有必要了解下 
 * @author zKF57533 
 */  
public class TestPath {  
    public static void main(String[] args) {  
        //获得path方法一,c:/ex/access.log   
        Path path = FileSystems.getDefault().getPath("c:/ex", "access.log");  
        System.out.println(path.getNameCount());  
        //获得path方法二，用File的toPath()方法获得Path对象   
        File file = new File("e:/ex/access.log");  
        Path pathOther = file.toPath();  
        //0,说明这两个path是相等的   
        System.out.println(path.compareTo(pathOther));  
        //获得path方法三   
        Path path3 = Paths.get("c:/ex", "access.log");  
        System.out.println(path3.toString());  
          
        //join two paths   
        Path path4 = Paths.get("c:/ex");  
        System.out.println("path4: " + path4.resolve("access.log"));  
        System.out.println("--------------分割线---------------");  
        try {  
            if(Files.isReadable(path)){  
                //注意此处的newBufferedRead的charset参数，如果和所要读取的文件的编码不一致，则会抛出异常   
                //java的新特性，不用自己关闭流   
                BufferedReader br = Files.newBufferedReader(path, Charset.defaultCharset());
                //new BufferedReader(new FileReader(new File("e:/logs/access.log")));//   
                String line = "";  
                while((line = br.readLine()) != null){  
                    System.out.println(line);  
                }  
            }else{  
                System.err.println("cannot readable");  
            }  
        } catch (IOException e) {  
            System.err.println("error charset");  
        }  
          
    }  
  
}  

运行:
C:\ex>java TestPath
2
-2
c:\ex\access.log
path4: c:\ex\access.log
--------------分割线---------------
aa
bb
cc