Java -----将省市区的txt文件转化为map的字典

   昨天学了iOS的省市区的txt文件转化为键值对列表,类似JSON数据格式的数据,今天正好星期日, 闲来无事, 便想着用以前自学的Java实现一样的功能.

终于, 功夫不负有心人,写完了.

package province;
import java.awt.List;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Dictionary;
import java.util.HashMap;
import java.util.Map;

import javax.sound.sampled.AudioFormat.Encoding;

public class Province {
  public static void main(String[] args){
     // System.out.print("hello world");
      /** 读取文件到string数组当中 */
      String encoding = "UTF-8";
      Map map = new HashMap();
      String strings[] = new String[1000] ;
      int i = 0;
     try {
        File file = new File("/Users/dllo/Downloads/area.txt");   
        if(file.isFile() && file.exists()){  //判断文件是否存在
            InputStreamReader read = new InputStreamReader(new FileInputStream(file),encoding);
            BufferedReader bufferReader = new BufferedReader(read);
            String lineText = null;
            while((lineText = bufferReader.readLine()) != null){
                
                strings[i] = lineText;
                i += 1;
            }
        }
    } catch (Exception e) {
        // TODO: handle exception
    } 
     
      String province = "";  //保存上一个省名的变量
      String city = "";   //保存上一个市名的变量
      int n = 0;
    for (String string : strings) {
        
        if (!string.startsWith(" ")) {  //检查是否不以空格开头----省名
            HashMap<Object, Object> map2 = new HashMap<>(); //新建市的字典(hashmap), 键是省名,值是市名
            map.put(string, map2);
            province  = string ;
        }else if (!string.startsWith("    ")) { //检查是否以4个空格开头----市名
            ArrayList<String> strings2 = new ArrayList<String>(); //新建区名数组
            Map map3 = (Map)map.get(province);
            map3.put(string, strings2);
            city = string;
            n = 0;
        }else{  //区名
            ArrayList<String> string3 = (ArrayList<String>) ((Map) map.get(province)).get(city);//找到要添加区名的数组
            string3.add(string);
        }
    }
      
      System.out.println(map);  //输出map
  }
}

area.txt文件和iOS里面的文件一样.