java 读写ini文件

转自：http://blog.csdn.net/baggio328/article/details/1780707

在java中，配置文件一般主要是两种形式：xml文件或者property文件。但大部分人都习惯使用ini文件，而且ini文件的分节以及注释功能，比起xml，也是易懂易用的。 在vc中类库中有读写ini文件的标准函数。在dephi或其他语言中，也可以用windows的api函数来读写ini文件。但在java中似乎没有现成的类和方法可供使用。虽然java可以通过加载dll文件的方法来调用windows的api，但总觉得不够正宗。

package mytools; 

import java.io.BufferedReader; 
import java.io.BufferedWriter; 
import java.io.FileReader; 
import java.io.FileWriter; 
import java.io.IOException; 
import java.util.regex.Matcher; 
import java.util.regex.Pattern; 

/** *//** *//** *//** 
* 这是个配置文件操作类，用来读取和设置ini配置文件 
* @author 由月 
* @version 2004-08-18 
*/ 
public final class ConfigurationFile ......{ 
/** *//** *//** *//** 
* 从ini配置文件中读取变量的值 
* @param file 配置文件的路径 
* @param section 要获取的变量所在段名称 
* @param variable 要获取的变量名称 
* @param defaultValue 变量名称不存在时的默认值 
* @return 变量的值 
* @throws IOException 抛出文件操作可能出现的io异常 
*/ 
public static String getProfileString( 
String file, 
String section, 
String variable, 
String defaultValue) 
throws IOException ......{ 
String strLine, value = ""; 
BufferedReader bufferedReader = new BufferedReader(new FileReader(file)); 
boolean isInSection = false; 
try ......{ 
while ((strLine = bufferedReader.readLine()) != null) ......{ 
strLine = strLine.trim(); 
strLine = strLine.split("[;]")[0]; 
Pattern p; 
Matcher m; 
p = Pattern.compile("file://[//s*.*//s*//]"); 
m = p.matcher((strLine)); 
if (m.matches()) ......{ 
p = Pattern.compile("file://[//s*" + section + "file://s*//]"); 
m = p.matcher(strLine); 
if (m.matches()) ......{ 
isInSection = true; 
} else ......{ 
isInSection = false; 
} 
} 
if (isInSection == true) ......{ 
strLine = strLine.trim(); 
String[] strArray = strLine.split("="); 
if (strArray.length == 1) ......{ 
value = strArray[0].trim(); 
if (value.equalsIgnoreCase(variable)) ......{ 
value = ""; 
return value; 
} 
} else if (strArray.length == 2) ......{ 
value = strArray[0].trim(); 
if (value.equalsIgnoreCase(variable)) ...{ 
value = strArray[1].trim(); 
return value; 
} 
} else if (strArray.length > 2) ...{ 
value = strArray[0].trim(); 
if (value.equalsIgnoreCase(variable)) ...{ 
value = strLine.substring(strLine.indexOf("=") + 1).trim(); 
return value; 
} 
} 
} 
} 
} finally ...{ 
bufferedReader.close(); 
} 
return defaultValue; 
} 
/** *//** 
* 修改ini配置文件中变量的值 
* @param file 配置文件的路径 
* @param section 要修改的变量所在段名称 
* @param variable 要修改的变量名称 
* @param value 变量的新值 
* @throws IOException 抛出文件操作可能出现的io异常 
*/ 
public static boolean setProfileString( 
String file, 
String section, 
String variable, 
String value) 
throws IOException ...{ 
String fileContent, allLine,strLine, newLine, remarkStr; 
String getValue; 
BufferedReader bufferedReader = new BufferedReader(new FileReader(file)); 
boolean isInSection = false; 
fileContent = ""; 
try ...{ 

while ((allLine = bufferedReader.readLine()) != null) ...{ 
allLine = allLine.trim(); 
if (allLine.split("[;]").length > 1) 
remarkStr = ";" + allLine.split(";")[1]; 
else 
remarkStr = ""; 
strLine = allLine.split(";")[0]; 
Pattern p; 
Matcher m; 
p = Pattern.compile("file://[//s*.*//s*//]"); 
m = p.matcher((strLine)); 
if (m.matches()) ...{ 
p = Pattern.compile("file://[//s*" + section + "file://s*//]"); 
m = p.matcher(strLine); 
if (m.matches()) ...{ 
isInSection = true; 
} else ...{ 
isInSection = false; 
} 
} 
if (isInSection == true) ...{ 
strLine = strLine.trim(); 
String[] strArray = strLine.split("="); 
getValue = strArray[0].trim(); 
if (getValue.equalsIgnoreCase(variable)) ...{ 
newLine = getValue + " = " + value + " " + remarkStr; 
fileContent += newLine + " "; 
while ((allLine = buffer
edReader.readLine()) != null) ...{ 
fileContent += allLine + " "; 
} 
bufferedReader.close(); 
BufferedWriter bufferedWriter = 
new BufferedWriter(new FileWriter(file, false)); 
bufferedWriter.write(fileContent); 
bufferedWriter.flush(); 
bufferedWriter.close(); 

return true; 
} 
} 
fileContent += allLine + " "; 
} 
}catch(IOException ex)...{ 
throw ex; 
} finally ...{ 
bufferedReader.close(); 
} 
return false; 
} 
/** *//** 
* 程序测试 
*/ 
public static void main(String[] args) ...{ 
//String value = Config.getProfileString("sysconfig.ini", "Option", "OracleDB", "default"); 
//System.out.println(value); 
try ...{ 
System.out.println(ConfigurationFile.setProfileString("d:/1.ini", "Settings", "SampSize", "111")); 
} catch (IOException e) ...{ 
System.out.println(e.toString()); 
} 

} 
}