我的ip地址查询

IP地址归属地查询

⽬标

通过开发IP地址归属地查询平台，我们需要对JavaSE综合技术有所提升，增强实战能⼒。学习完该项⽬我们应该具备如下能⼒：

1⾯向对象程序设计

2⼯具类二本军校 封装与使⽤写法

3⽂件IO流

4字符串处理

5⼆分法查找

6IP地址的不同形式的使⽤

思路

1程序中读取内容

2解析IP字符串,进⾏结构化处理

3封装⼯具类

4接⼝API

⼊参:IP

出参:归属地

代码开发

读取⽂件

publicstaticListgetLineList(StringfilePath,Stringencoding)throwsIOException{

//节点流对接⽂件

FileInputStreamfis=newFileInputStream(filePath);

//转换为字符并指定字符编码

Readerreader=newInputStreamReader(fis,encoding);

//缓冲流提⾼效率

BufferedReaderbr=newBufferedReader(reader);

//爱国主题手抄报 读取

Stringline=null;

//保存读取的数据

ListlineList=newArrayList();

while((line=ne())!=null){

//添加到集合中

(line);

}

//关闭

();

returnlineList;

结构化ip地址实体类

*

*

*/

publicclassIPAndLocationPojoimplementsComparable{

//衍⽣字段⽤于保存ip对应的long值

privatelongstartIPLong;

privatelongstartIPLong;

privatelongendIPLong;

//起始IP

privateStringstartIP;

//结束IP

privateStringendIP;

//归属地

privateStringlocation;

publicintcompareTo(IPAndLocationPojoo){

longstatus=PLong;

//不能强制转换如果两个值相差2127483647的话转换为int之后得到负数

//return(int)(PLong);

returnstatus>0?1:0;

}

publicIPAndLocationPojo(longstartIPLong,longendIPLong,StringstartIP,

StringendIP,Stringlocation){

super();

//对长整型赋值

PLong=ng(startIP);;

ong=ng(endIP);;

P=startIP;

=endIP;

on=location;

}

publiclonggetStartIPLong(){

returnstartIPLong;

}

publicvoidtStartIPLong(longstartIPLong){

PLong=startIPLong;

}

publiclonggetEndIPLong(){

returnendIPLong;

}

publicvoidtEndIPLong(longendIPLong){

ong=endIPLong;

}

publicStringgetStartIP(){

returnstartIP;

}

publicvoidtStartIP(StringstartIP){

P=startIP;

}

publicStringgetEndIP(){

returnendIP;

}

publicvoidtEndIP(StringendIP){

=endIP;

}

publicStringgetLocation(){

returnlocation;

}

publicvoidtLocation(Stringlocation){

on=location;

}

publicIPAndL凯迪拉克广告语 ocationPojo(){

super();

//TODOAuto-generatedconstructorstub

}

@Override

publicStringtoString(){

return"IPAndLocationPojo[startIPLong="+startIPLong+",endIPLong="

+endIPLong+",startIP="+startIP+",endIP="+endIP

+",location="+location+"]";

}

程序核⼼业务类

*

*

*/

publicclassDataProcessManager{

privatestaticIPAndLocationPojo[]ipAndLocationPojoArray=null;

static{

//⽂件路径

StringipLibrayPath="ip_location_";

Stringencoding="UTF-8";

//保存数据对象

ListipAndLocationPojos=null;

try{

//获取数据

ipAndLocationPojos=oList(ipLibrayPath,

encoding);

//转数组并排序

ipAndLocationPojoArray=DataProcessManager

.convertListToArraySort(ipAndLocationPojos);

}catch(IOExceptione){

tackTrace();

}

}

/**

*对外提供的接⼝⼊参是ip出参是归属地

*@paramipAndLocationPojos

*@return

*/

publicstaticStringgetLocation(Stringip){

//⼆分法查找

intindex=ySeach(ipAndLocationPojoArray,ip);

//判断是否找到

if(index==-1){

returnnull;

}el{

returnipAndLocationPojoArray[index].getLocation();

}

}

/**

*⼆分法查找,⼊参是IP和数组,出参是对应的索引,找不到返回-1;

*@paramipAndLocationPojos

*@return

*/

publicstaticintbinaraySeach(IPAnd七夕情人节 LocationPojo[]ipAndLocationPojoArray,

StringtargetIP){

//把IP转换为long

longtargetIPLong=ng(targetIP);

intstartIndex=0;

intendIndex=-1;

intm=(startIndex+endIndex)/2;

/**

*如果⼩于起始IP找前⾯

*

*如果⼤于起始IP找后⾯

*

*如果⼤于等于起始IP且⼩于等于结束IP则说明找到了

*/

while(startIndex<=endIndex){

if(targetIPLong>=ipAndLocationPojoArray[m].getStartIPLong()

&&targetIPLong<=ipAndLocationPojoArray[m].getEndIPLong()){

returnm;

returnm;

}

if(targetIPLong

endIndex=m-1;

}el{

startIndex=m+1;

}

m=(startIndex+endIndex)/2;

}

return-1;

}

//把集合转换为数组并排序

publicstaticIPAndLocationPojo[]convertListArraySort(ListipAndLocationPojos){

//创建数组

IPAndLocationPojo[]ipAndLocationPojoArray=newIPAndLocationPojo[()];

//转换为数组

y(ipAndLocationPojoArray);

//排序

(ipAndLocationPojoArray);

returnipAndLocationPojoabcc词语大全 Array;

}

//结构化数据集合

publicstaticListgetPojoList(StringfilePath,Stringencoding)throwsIOException{

//保存数据对象

ListipAndLocationPojos=newArrayList();

ListlineList=eList(filePath,encoding);

for(Stringstring:lineList){

//判断是否是空⾏

if(string==null||().equals("")){

co借条如何写 ntinue;

}

//分割数组

String[]columnArray=("");

//获取起始ip

StringstartIP=columnArray[0];

//获取结束ip

StringendIP=columnArray[1];

//获取归属地

Stringlocation=columnArray[2];

//封装到对象中

IPAndLocationPojoipAndLocationPojo=newIPAndLocationPojo(startIP,endIP,location);

//添加到集合中

(ipAndLocationPojo);

}

returnipAndLocationPojos;

//⼊⼝

publicclassSystemController{

@SuppressWarnings("resource")

publicsta第二世界大战 ticvoidmain(String[]args){

//接收⽤户输⼊

Scannerscanner=newScanner();

while(true){

n("请输⼊IP地址:");

Stringip=ne();

//查询

longstartTime=tTimeMillis();

Stringlocation=ati判断处女 on(ip);

longendTime=tTimeMillis();

n("耗时:"+(endTime-startTime)+""

+location);