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java讀取ini格式的文件

code 代碼 全部 system section java讀取 iter out indexof

技術分享圖片

已上圖就是ini文件的格式,經常在配置文件中用到。

1、核心代碼:

/**
     * 去除ini文件中的註釋,以";"或"#"開頭,順便去除UTF-8等文件的BOM頭
     * @param source
     * @return
     */
    private static String removeIniComments(String source){
        String result = source;
        
        if(result.contains(";")){
            result = result.substring(0, result.indexOf(";"));
        }
        
        
if(result.contains("#")){ result = result.substring(0, result.indexOf("#")); } return result.trim(); } public static Map<String,Object> readIni(String filename){ Map<String,List<String>> listResult=new HashMap<>(); Map
<String,Object> result=new HashMap(); String globalSection = "global"; File file = new File(filename); BufferedReader reader=null; try { reader=new BufferedReader(new InputStreamReader(new FileInputStream(file))); String str
= null; String currentSection = globalSection; //處理缺省的section List<String> currentProperties = new ArrayList<>(); boolean lineContinued = false; String tempStr = null; //一次讀入一行(非空),直到讀入null為文件結束 //先全部放到listResult<String, List>中 while ((str = reader.readLine()) != null) { str = removeIniComments(str).trim(); //去掉尾部的註釋、去掉首尾空格 if("".equals(str)||str==null){ continue; } //如果前一行包括了連接符‘\‘ if(lineContinued == true){ str = tempStr + str; } //處理行連接符‘\‘ if(str.endsWith("\\")){ lineContinued = true; tempStr = str.substring(0,str.length()-1); continue; }else { lineContinued = false; } //是否一個新section開始了 if(str.startsWith("[") && str.endsWith("]")){ String newSection = str.substring(1, str.length()-1).trim(); //如果新section不是現在的section,則把當前section存進listResult中 if(!currentSection.equals(newSection)){ listResult.put(currentSection, currentProperties); currentSection = newSection; //新section是否重復的section //如果是,則使用原來的list來存放properties //如果不是,則new一個List來存放properties currentProperties=listResult.get(currentSection); if(currentProperties==null){ currentProperties = new ArrayList<>(); } } }else{ currentProperties.add(str); } } //把最後一個section存進listResult中 listResult.put(currentSection, currentProperties); reader.close(); }catch (IOException e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (IOException e1) { } } } //整理拆開name=value對,並存放到MAP中: //從listResult<String, List>中,看各個list中的元素是否包含等號“=”,如果包含,則拆開並放到Map中 //整理後,把結果放進result<String, Object>中 for(String key : listResult.keySet()){ List<String> tempList = listResult.get(key); //空section不放到結果裏面 if(tempList==null||tempList.size()==0){ continue; } if(tempList.get(0).contains("=")){ //name=value對,存放在MAP裏面 Map<String, String> properties = new HashMap<>(); for(String s : tempList){ int delimiterPos = s.indexOf("="); //處理等號前後的空格 properties.put(s.substring(0,delimiterPos).trim(), s.substring(delimiterPos+1, s.length()).trim()); } result.put(key, properties); }else{ //只有value,則獲取原來的list result.put(key, listResult.get(key)); } } return result; }

2、測試代碼:

Map<String, Object> ini = readIni("E:/testini.ini");
        for(String k : ini.keySet()){
            System.out.println(k + ini.get(k));            
        }
        
        System.out.println("獲取單個值:"+((Map<String, String>)ini.get("section2")).get("key3"));

java讀取ini格式的文件