java設定ini設定檔

來源:互聯網
上載者:User
 

在java中,設定檔一般主要是兩種形式:xml檔案或者property檔案。但大部分人都習慣使用ini檔案,而且ini檔案的分節以及注釋功能,比起xml,也是易懂易用的。    在vc中類庫中有讀寫ini檔案的標準函數。在dephi或其他語言中,也可以用windows的api函數來讀寫ini檔案。但在java中似乎沒有現成的類和方法可供使用。雖然java可以通過載入dll檔案的方法來調用windows的api,但總覺得不夠正宗。    於是自己寫了個讀寫ini設定檔的類,供大家參考。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;/**
 * 這是個設定檔操作類,用來讀取和設定ini設定檔
 * @author 由月
 * @version 2004-08-18
 */
public final class ConfigurationFile {
 /**
  * 從ini設定檔中讀取變數的值
  * @param file 設定檔的路徑
  * @param section 要擷取的變數所在段名稱
  * @param variable 要擷取的變數名稱
  * @param defaultValue 變數名稱不存在時的預設值
  * @return 變數的值
  * @throws IOException 拋出檔案操作可能出現的io異常
  */
 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("//[//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設定檔中變數的值
 * @param file 設定檔的路徑
 * @param section 要修改的變數所在段名稱
 * @param variable 要修改的變數名稱
 * @param value 變數的新值
 * @throws IOException 拋出檔案操作可能出現的io異常
 */
 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";
   }
  }catch(IOException ex){
   throw ex;
  } finally {
   bufferedReader.close();
  }
  return false;
 }
 /**
  * 程式測試
  */
 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());
  }
  
 }
}這個類可以讀和寫ini檔案,不過先說明一點:它識別ini檔案中的“;”為注釋符,而不是識別“#”為注釋符。 

 

相關文章

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.