java学习笔记之JavaIO(1):用java读取文本文件

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要求：用java读取手机号码归属地文件

1、安徽联通.txt:内容如下

13003000000-13003009999-合肥13003010000-13003029999-蚌埠13003030000-13003049999-芜湖13003050000-13003069999-合肥13003070000-13003079999-淮南13003080000-13003089999-合肥13003090000-13003099999-巢湖13004000000-13004009999-淮南13004010000-13004039999-阜阳13004040000-13004069999-芜湖13004070000-13004099999-蚌埠13010300000-13010309999-合肥13013000000-13013029999-滁州13013030000-13013039999-巢湖13013040000-13013049999-池州13013050000-13013059999-淮南13013060000-13013099999-合肥13013100000-13013119999-马鞍山13013120000-13013129999-黄山13013130000-13013149999-宣城13013150000-13013159999-铜陵13013160000-13013199999-安庆13014000000-13014019999-宿州13014020000-13014039999-六安13014040000-13014059999-淮北13014060000-13014099999-阜阳13023000000-13023009999-合肥13023010000-13023029999-蚌埠13023030000-13023049999-芜湖

2、开始读取：java源文件：ShowTel.java

package com.insigma.zd.group4.liuchao.languagebase;import java.io.BufferedReader;import java.io.FileReader;public class ShowTel {/** * @param args */public static void main(String[] args) throws Exception{// TODO Auto-generated method stubFileReader fr = new FileReader("D:/My Documents/手机号码归属地/安徽联通.txt");BufferedReader br = new BufferedReader(fr);String str = null;String[] arr = null;System.out.println("开始号码\t结束号码\t归属地");while((str = br.readLine())!= null ){arr = str.split("-");System.out.println(arr[0]+"\t"+arr[1]+"\t"+arr[2]);}}}

运行截图如下：

3、主要知识点：

1）readLine():逐行读取 2）spilt():分割字符串为字符串数组 3）FileReader和BufferedReader的使用

4、考虑把文件读进数据库