INI parameter (text file) reading and writing

Parameters (text file) read-write, by chillming


import java.io.*;


public class inifile{


private String FileName = "";


public IniFile (String fn) {


FileName = fn;


}


//Returns the value of the parameter


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 ()) {


//Find


pvalue = linestr.substring (Pos+1,linestr.indexof (";")). Trim ();


break;


}


}catch (NullPointerException e) {


//File tail


break;


}


}


Rfile.close ();


}catch (IOException e)


{


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


return PV;


}


return pvalue;


}


//Update or add Parameters


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) {


//file does not exist


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 (";")). Trim ();


if (pname.equals (PN)) {


linestr = pname + "=" + PV + "; \ n";


Ishere = true;


}else{


linestr = pname + "=" + pvalue + "; \ n";


}


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


Alllines + = Linestr;


}


}catch (NullPointerException e) {


//File tail


break;


}


}


Rfile.close ();


}catch (IOException e) {


return false;


}


try{


BufferedWriter fout=new BufferedWriter (New FileWriter (FileName));


if (!ishere) {


linestr = PN + "=" + PV + "; \ n";


Alllines + = Linestr;


}


Fout.write (Alllines);


Fout.close ();


}catch (IOException e)


{


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


return false;


}


return true;


}


//Delete parameters


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 + "\ n";


}


}catch (NullPointerException e) {


//File tail


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 void Main (String args[]) {


String fn = "Config.txt";


String Pv = "";


//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. Readpara ("Java1", "JAVA1");


System.out.println (PV);


Pv = Inifile. Readpara ("Java", "java0");


System.out.println (PV);


}


}