全国行政区划读取到内存中

package com.vtradex.ehub.lbs.utils;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.aliyun.openservices.shade.com.alibaba.rocketmq.shade.com.alibaba.fastjson.JSON;
import com.aliyun.openservices.shade.org.apache.commons.codec.Charsets;
import com.google.common.collect.Maps;
import com.google.common.io.Files;

public class AdministrativeArea {

	private static HashMap<String, String> map = Maps.newHashMap();

	private static Logger logger=LoggerFactory.getLogger(AdministrativeArea.class);
	/**
	 * 以行为单位读取文件，常用于读面向行的格式化文件
	 * @return 
	 */
	static{
		File file = new File(AdministrativeArea.class.getResource("/AdministrativeArea.txt").getFile());
		List<String> list;
		String code,name;
		try {
			list = Files.readLines(file, Charsets.UTF_8);
			for (String tempString : list) {
				if (!tempString.equals("")) {
					code=getCode(tempString);
					name=getChinese(tempString);
					//市辖区不用存储
					if(name.equals("市辖区")) {
						name="";
					}
					map.put(code,name);
				}
			}
			logger.info("全国行政区："+JSON.toJSONString(map));
		} catch (IOException e) {
			logger.error("读取全国行政区失败，检查是否存在文件和文件编码是否为utf-8");
			e.printStackTrace();
		}

	}

	public static String getMatcher(String regex, String str) {
		String result = "";
		Pattern pattern = Pattern.compile(regex);
		Matcher matcher = pattern.matcher(str);
		while (matcher.find()) {
			result = matcher.group(1);
		}
		return result;
	}

	//截取编码
	protected static String getCode(String str) {
		return getMatcher("(\\d+).*", str);
	}
    //截取行政区名称
	protected static String getChinese(String str) {
		return getMatcher("([\u4e00-\u9fa5].*)", str);
	}
	
	//判断字符串是否匹配正则
	public static boolean matches(String regex, String str) {
		Pattern pattern = Pattern.compile(regex);
		Matcher matcher = pattern.matcher(str);
		return matcher.matches();
	}
	
	//判断是否为行政区编码
	public static boolean isAreaCode(String code) {
		String regex="[1-9]\\d{5}(?!\\d)";
		return matches(regex, code);
	}
	
	public static String getNameByCode(String code) {
		//判断字符串长度是否为6位
		if(code==null||code.equals("")||!isAreaCode(code)) {
			return "";
		}
		String name="";
		//根据行政区规则，判断是否有上一级行政区，最后两位不为0说明是三级行政区，中间两位
		String provinceCode=code.substring(0, 2)+"0000";
		String cityCode=code.substring(0, 4)+"00";
		//获取省份
		if(code.equals(provinceCode)) {
			name=map.get(provinceCode);
		}else if(code.equals(cityCode)) {
			name=map.get(provinceCode)+map.get(cityCode);
		}else {
			name=map.get(provinceCode)+map.get(cityCode)+map.get(code);
		}
		return name;
	}
	
	public static void main(String[] args) {
		System.out.println(getNameByCode("445102"));
	}

}