AddressData

读取速度贼快的地址库，包含省市区及身份证号前缀

• 地址库大小 54.14746KB

• 读取耗时 14~25ms （MacBook Pro LQ2 i7-4770HQ）

{北京市={市辖区={东城区=110101, 西城区=110102, 崇文区=110103,...

代码

package com.address;import java.io.BufferedInputStream;
import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.LinkedHashMap;/**
* Created by wanjian on 2017/11/15.
*/public class Read {public static void main(String[] args) throws IOException {String file = "area.bin";System.out.println("地址库大小/KB " + new File(file).length() / 1024f);long s = System.currentTimeMillis();InputStream inputStream = new BufferedInputStream(new FileInputStream(file));LinkedHashMap<String, LinkedHashMap<String, LinkedHashMap<String, Integer>>> map = read(inputStream);inputStream.close();System.out.println("读取耗时/ms " + (System.currentTimeMillis() - s));System.out.println(map);}private static LinkedHashMap<String, LinkedHashMap<String, LinkedHashMap<String, Integer>>> read(InputStream in) throws IOException {BufferedInputStream inputStream = new BufferedInputStream(in);LinkedHashMap<String, LinkedHashMap<String, LinkedHashMap<String, Integer>>> provinceSet = new LinkedHashMap<>();byte provinceSetSize = readByte(inputStream);for (int i = 0; i < provinceSetSize; i++) {String provinceName = readString(inputStream);LinkedHashMap<String, LinkedHashMap<String, Integer>> citySet = new LinkedHashMap<>();provinceSet.put(provinceName, citySet);byte citySetSize = readByte(inputStream);for (int j = 0; j < citySetSize; j++) {String cityName = readString(inputStream);LinkedHashMap<String, Integer> areaSet = new LinkedHashMap<>();citySet.put(cityName, areaSet);byte areaSetSize = readByte(inputStream);for (int k = 0; k < areaSetSize; k++) {String areaName = readString(inputStream);int code = read3Byte(inputStream);areaSet.put(areaName, code);}}}return provinceSet;}private static String readString(InputStream inputStream) throws IOException {byte[] str = new byte[readByte(inputStream)];int read = 0;int count;while ((read < str.length)) {count = inputStream.read(str, read, str.length - read);if (count < 0) {throw new EOFException("address file maybe incomplete");}read += count;}return new String(str, "UTF-8");}private static int read3Byte(InputStream inputStream) throws IOException {int h = inputStream.read();if (h < 0) {throw new EOFException("address file maybe incomplete");}int m = inputStream.read();if (m < 0) {throw new EOFException("address file maybe incomplete");}int l = inputStream.read();if (l < 0) {throw new EOFException("address file maybe incomplete");}return h << 16 | m << 8 | l;}private static byte readByte(InputStream inputStream) throws IOException {int v = inputStream.read();if (v < 0) {throw new IOException("address file maybe incomplete");}return (byte) v;}/* 生成地址库文件public static void geneAddressFile(LinkedHashMap<String, LinkedHashMap<String, LinkedHashMap<String, Integer>>> provinceSet) throws IOException {OutputStream outputStream = new BufferedOutputStream(new FileOutputStream("/area.bin"));writeByte((byte) provinceSet.size(), outputStream);for (Map.Entry<String, LinkedHashMap<String, LinkedHashMap<String, Integer>>> province : provinceSet.entrySet()) {String provinceName = province.getKey();writeString(provinceName, outputStream);LinkedHashMap<String, LinkedHashMap<String, Integer>> citySet = province.getValue();writeByte((byte) citySet.size(), outputStream);for (Map.Entry<String, LinkedHashMap<String, Integer>> city : citySet.entrySet()) {String cityName = city.getKey();writeString(cityName, outputStream);LinkedHashMap<String, Integer> areaSet = city.getValue();writeByte((byte) areaSet.size(), outputStream);for (Map.Entry<String, Integer> codeSet : areaSet.entrySet()) {String codeName = codeSet.getKey();writeString(codeName, outputStream);int code = codeSet.getValue();write3Byte(code, outputStream);}}}outputStream.close();}private static void writeString(String s, OutputStream outputStream) throws IOException {byte bytes[] = s.getBytes("UTF-8");writeByte((byte) bytes.length, outputStream);outputStream.write(bytes);}private static void writeByte(byte b, OutputStream outputStream) throws IOException {outputStream.write(b);}private static void write3Byte(int v, OutputStream outputStream) throws IOException {outputStream.write((v >> 16) & 0xFF);outputStream.write((v >> 8) & 0xFF);outputStream.write(v & 0xFF);}*/
}复制代码

源码地址 https://github.com/android-notes/AddressData