BufferReader et InpuStreamReader ?
Bonjour,
j'aimerai avoir accès à un fichier .ini en java et j'ai trouvé quelques informations sur internet et notamment 2 classes ProfileReader et INIHandler que j'ai fusionner pour avec toutes les focntionnalités désirées.
voila ce que j'obtiens :
Code:
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import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.StringTokenizer;
public class ProfileReader {
/**
*
*/
private String configFilename;
/**
*
*/
private Hashtable sections;
/**
*
*/
private HashMap sectionMap;
/**
*
*/
private HashMap newPairMap;
/**
* Creates a new ProfileReader
*/
public ProfileReader(String inFile) {
this.sections = new Hashtable();
this.sectionMap = new HashMap();
this.newPairMap = new HashMap();
this.configFilename = inFile;
}
public void loadSection() {
BufferedReader fs = null;
try {
String line;
String section = null;
HashMap map = null;
fs = new BufferedReader(new FileReader(this.configFilename));
while ((line = fs.readLine()) != null) {
// check for "[", if not this is a name-value pair
if (line.indexOf("[") == -1) {
String name;
String value;
if (line.trim().length() > 0) {
line = line.trim();
if (line.indexOf("=") > -1) {
name = line.substring(0, line.indexOf("=")).trim();
value = line.substring(line.indexOf("=") + 1,
line.length()).trim();
} else {
name = line.trim();
value = "";
}
map.put(name, value);
}
} else { // this is the section line
// a new section begins
if (map != null) {
if (map.size() != 0) {
this.sectionMap.put(section, map);
}
}
line = line.trim();
section = line.substring(1, line.length() - 1);
map = new HashMap();
}
}
// add the last map
if (map.size() != 0) {
this.sectionMap.put(section, map);
}
} catch (FileNotFoundException f) {
// take care
} catch (IOException i) {
// take care
} catch (NullPointerException e) {
// Section was not found
} finally {
try {
fs.close();
} catch (Exception e) {
// take care
}
}
}
/**
* Load the current objet with the data found in the given stream
* @param aStream the stream that represent the INI file.
* @throws Exception in case of problems.
*/
public void load(InputStream aStream) throws Exception {
if (null == aStream) {
return;
}
BufferedReader bReader = new BufferedReader(new InputStreamReader(aStream));
String line = null;
String sectionName = null;
Hashtable section = null;
while ((line = bReader.readLine()) != null) {
line = line.trim();
// All the data should be in a section
if (null == sectionName) {
if ((!line.startsWith("[")) || (!line.endsWith("]"))) {
throw new Exception("Invalid format: data found outside section");
}
sectionName = line.substring(1, line.length() - 1).trim();
addSection(sectionName);
section = getSection(sectionName);
} else {
if (line.startsWith("[")) {
if (!line.endsWith("]")) {
throw new Exception("Invalid format: no ending ] for section name");
}
sectionName = line.substring(1, line.length() - 1).trim();
addSection(sectionName);
section = getSection(sectionName);
} else {
addLineToSection(line, section);
}
}
}
}
/**
* Return the value of the given key in the given section
* @param aSectionName the name of the section
* @param aKey the key
* @return the value if found or null.
*/
public String getProperty(String aSectionName, String aKey) {
Hashtable section = getSection(aSectionName);
if (null == section) {
return null;
}
return (String) section.get(aKey);
}
/**
* @param _section
* @param _name
* @param _value
*/
public void setProperty(String _section, String _name, String _value) {
HashMap hMap = (HashMap) this.sectionMap.get(_section);
if (hMap == null) {
this.newPairMap = new HashMap();
this.newPairMap.put(_name, _value);
this.sectionMap.put(_section, this.newPairMap);
} else {
hMap.put(_name, _value);
}
}
public void removeProperty(String _section, String _name) {
HashMap hMap = (HashMap) this.sectionMap.get(_section);
hMap.remove(_name);
}
/**
*
* @param aLine
* @param aSection
* @throws java.lang.Exception
*/
private void addLineToSection(String aLine, Hashtable aSection) throws Exception {
if (null == aLine) {
return;
}
if (null == aSection) {
throw new Exception("No section found to add data");
}
aLine = aLine.trim();
// lines that starts with ; are comments
if (aLine.startsWith(";")) {
return;
}
// Avoid the empty lines
if (aLine.length() == 0) {
return;
}
// The format of a line of data is: key = value
StringTokenizer st = new StringTokenizer(aLine, "=");
if (st.countTokens() != 2) {
throw new Exception("Invalid format of data: " + aLine);
}
String key = st.nextToken().trim();
// a key should not contain spaces
for (int index = 0; index < key.length(); index++) {
if (Character.isWhitespace(key.charAt(index))) {
throw new Exception("Invalid format of data: " + aLine);
}
}
String value = st.nextToken().trim();
aSection.put(key, value);
}
/**
* @param aSectionName
* @return
*/
public Hashtable getSection(String aSectionName) {
return (Hashtable) this.sections.get(aSectionName);
}
/**
* @param aSectionName
*/
public void addSection(String aSectionName) {
if (null == aSectionName) {
return;
}
Hashtable section = getSection(aSectionName);
if (null == section) {
section = new Hashtable();
this.sections.put(aSectionName, section);
}
}
/**
* @param outFile
*/
public void saveSection() {
BufferedWriter fw = null;
try {
fw = new BufferedWriter(new FileWriter(this.configFilename));
// Write original file to tempfile until section
try {
Iterator it = this.sectionMap.keySet().iterator();
while (it.hasNext()) {
String section = (String) it.next();
// Write header out
fw.write("[" + section + "]");
fw.newLine();
HashMap map = (HashMap) this.sectionMap.get(section);
Iterator iter = map.keySet().iterator();
while (iter.hasNext()) {
String name = (String) iter.next();
String value = (String) map.get(name);
// Write key-value pair out
fw.write(name + "=" + value);
fw.newLine();
}
}
} catch (NullPointerException a) {
// File might end before section is found
}
} catch (IOException e) {
} finally {
try {
fw.close();
} catch (Exception e) {
}
}
}
} |
J'aimerai obtimiser cette classe et notamment en supprimant une des deux méthodes load(InputStream aStream) et loadSection() qui ont l'air de faire la même chose...
Quelle est la différence d'utilisation entre un BufferReader et un InputStreamReader ?
Est-ce que quelqu'un peu m'aider?
Merci d'avance,
Bap
