java读写ini文件

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

/**
 *
 * 读取INI配置
 *
 * @param file
 *            INI配置文件完整路径
 *
 * @param sec
 *            项
 *
 * @param key
 *            键
 *
 * @param defaults
 *            默认值
 *
 * @return
 */

public class ProfileStringMgr {
 /**
  * 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;
  boolean isInSection = false;
  bufferedReader = new BufferedReader(new FileReader(file));

  try {
   while ((strLine = bufferedReader.readLine()) != null) {
    strLine = strLine.trim();
    strLine = strLine.split("[;]")[0];
    Pattern p;
    Matcher m;
    p = Pattern.compile("//[//s*.*//s*//]");
    m = p.matcher((strLine));
    if (m.matches()) {
     p = Pattern.compile("//[//s*" + section + "//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("//[//s*.*//s*//]");
    m = p.matcher((strLine));
    if (m.matches()) {
     p = Pattern.compile("//[//s*" + section + "//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";
   }
  } finally {
   bufferedReader.close();
  }
  return false;
 }
}