本文转载地址：
http://www.blogjava.net/silvernapoleon/archive/2006/08/07/62222.html
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
+
"
\r\n
"
;
while
((allLine
=
bufferedReader.readLine())
!=
null
)
{fileContent
+=
allLine
+
"
\r\n
"
;}
bufferedReader.close();BufferedWriter bufferedWriter
=
new
BufferedWriter(
new
FileWriter(file,
false
));bufferedWriter.write(fileContent);bufferedWriter.flush();bufferedWriter.close();
return
true
;}
}
fileContent
+=
allLine
+
"
\r\n
"
;}
}
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());}
}
}
原文：http://www.cnblogs.com/hthuang/p/4361927.html
