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巴黎人手机APP:INI参数(文本文件)的读写by chillming



//参数(文本文件)的读写,by chillming

import java.io.*;

public class IniFile{

private String FileName = "";

public IniFile(String fn){

FileName = fn;

}

//返回参数的值

public String ReadPara(String Para,String PV){

String PName = "";

String PValue = PV;

String LineStr = "";

int pos = 0;

try{

BufferedReader RFile =new BufferedReader(new FileReader(FileName));

while(true){

try{

LineStr = RFile.readLine();

pos = LineStr.indexOf("=");

PName = LineStr.substring(0,pos).trim();

if(PName.equals(Para.trim())){

//找到

PValue = LineStr.substring(pos+1,LineStr.indexOf(";")).trim();

break;

}

}catch(NullPointerException e){

//文件尾

break;

}

}

RFile.close();

}catch (IOExceptione)

{

if(PV==null)PV = "";

return PV;

}

return PValue;

}

//更新或添加参数

public boolean WritePara(String PN,String PV){

String PName = "";

String PValue = "";

String LineStr = "";

String AllLines = "";

int pos = 0;

boolean isHere = false;

if(PV==null)PV = "";

try{

BufferedReader RFile = null;

try{

RFile = new BufferedReader(new FileReader(FileName));

}

catch(FileNotFoundException e){

//文件不存在

File file = new File(FileName);

file.createNewFile();

RFile = new BufferedReader(new FileReader(FileName));

}

while(true){

try{

LineStr = RFile.readLine();

pos = LineStr.indexOf("=");

PName = LineStr.substring(0,pos).trim();

PValue = LineStr.substring(pos+1,LineStr.indexOf巴黎人手机APP(";")).trim();

if(PName.equals(PN)){

LineStr = PName + "=" + PV + "巴黎人手机APP;

";

isHere = true;

}else{

LineStr = PName + "=" + PValue + ";

";

}

if(LineStr!=null && LineStr !=""){

AllLines += LineStr;

}

}catch(NullPointerException e){

//文件尾

break;

}

}

RFile.close();

}catch (IOException e) {

return false;

}

try{

BufferedWriter Fout=new BufferedWriter(new FileWriter(FileName));

if(!isHere){

LineStr = PN + "=" + PV + ";

";

AllLines += LineStr;

}

Fout.write(AllLines);

Fout.close();

}catch (IOException e)

{

System.out.println("io error write");

return false;

}

return true;

}

//删除参数

public boolean DelPara(String PN){

String PName = "";

String LineStr = "";

String AllLines = "";

int pos = 0;

try{

BufferedReader RFile = new BufferedReader(new FileReader(FileName));

while(true){

try{

LineStr = RFile.readLine();

pos = LineStr.indexOf("=");

PName = LineStr.substring(0,pos).trim();

if(!PName.equals(PN)){

AllLines += LineStr + "

";

}

}catch(NullPointerException e){

//文件尾

break;

}

}

RFile.close();

}catch (IOException e) {

return false;

}

try{

BufferedWriter Fout=new BufferedWriter(new FileWriter(FileName));

Fout.write(AllLines);

Fout.close();

}catch (IOException e)

{

return false;

}

return true;

}

public static vo巴黎人手机APPid main(String args[]) {

String fn = "Config.txt";

String Pv = "";巴黎人手机APP

//System.out.println(System.getProperty("user.dir"));

IniFile inifile= new IniFile(fn);

inifile.WritePara("java","chillming");

inifile.WritePara("java1","chillming1");

inifile.WritePara("java2","chillming2");

inifile.DelPara("java1");

Pv = inifile.ReadPara("java2","java2");

System.out.println(Pv);

Pv = inifile.Re巴黎人手机APPadPara("java1","java1");

System.out.println(Pv);

Pv = inifile.ReadPara("java","java0");

System.out.println(Pv);

}

}

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