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
    
     >> map = read(inputStream);       inputStream.close();       System.out.println("读取耗时/ms " + (System.currentTimeMillis() - s));       System.out.println(map);   }   private static LinkedHashMap
     
      >> read(InputStream in) throws IOException {       BufferedInputStream inputStream = new BufferedInputStream(in);       LinkedHashMap
      
       >> provinceSet = new LinkedHashMap<>();       byte provinceSetSize = readByte(inputStream);       for (int i = 0; i < provinceSetSize; i++) {           String provinceName = readString(inputStream);           LinkedHashMap
       
        > citySet = new LinkedHashMap<>();           provinceSet.put(provinceName, citySet);           byte citySetSize = readByte(inputStream);           for (int j = 0; j < citySetSize; j++) {               String cityName = readString(inputStream);               LinkedHashMap
        
          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
         
          >> provinceSet) throws IOException { OutputStream outputStream = new BufferedOutputStream(new FileOutputStream("/area.bin")); writeByte((byte) provinceSet.size(), outputStream); for (Map.Entry
          
           >> province : provinceSet.entrySet()) { String provinceName = province.getKey(); writeString(provinceName, outputStream); LinkedHashMap
           
            > citySet = province.getValue(); writeByte((byte) citySet.size(), outputStream); for (Map.Entry
            
             > city : citySet.entrySet()) { String cityName = city.getKey(); writeString(cityName, outputStream); LinkedHashMap
             
               areaSet = city.getValue(); writeByte((byte) areaSet.size(), outputStream); for (Map.Entry
              
                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