Java文本文件的按行读取-蒲公英云

Java文本文件的按行读取

package my;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.InputStream;
import java.io.InputStreamReader;
public class HelloWorld
{
    //以File作为输入源File->FileReader
    public static void test1(File source) throws Exception { 
        FileReader m=new FileReader(source);
        BufferedReader reader=new BufferedReader(m);
        while(true) {
            String nextline=reader.readLine();
            if(nextline==null) break;
            System.out.println("got:"+nextline);
        }
        reader.close();
    }
    //以InputStream作为输入源 InputStream->InputStreamReader
    public static void test2(InputStream source)throws Exception{
        InputStreamReader m=new InputStreamReader(source,"GBK");
        BufferedReader reader=new BufferedReader(m);
        while(true) {
            String nextline=reader.readLine();
            if(nextline==null) break;
            System.out.println("got:"+nextline);
        }
        reader.close();
    }
    public static void test3()throws Exception
    {
        InputStreamReader m=new InputStreamReader(System.in);
        BufferedReader reader=new BufferedReader(m);
        while(true) {
            System.out.print(">");
            String nextline=reader.readLine();
            if(nextline==null) break;
            if("exit".equals(nextline)) {
                System.out.println("Good Bye");
                break;
            }
            //处理用户输入
            System.out.println("handle command:"+nextline);
        }
        reader.close();
    }
    public static void main(String[] args){    
        try {
            test1(new File("C:/example/aaa"));
            //test2(new FileInputStream("c:/example/aaa"));
            //test3();
        }catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}