读取以key=value形式存储的txt文件

public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(
                new InputStreamReader(
                        new FileInputStream("C:\\Users\\Administrator\\Desktop\\test.txt"),"GBK"));
        String str = "";
        Map<String,String> map = new LinkedHashMap<String,String>();
        String value = null,key = null;
        int i = 0;
        while((str=br.readLine())!=null) {
            System.out.println(str);
            if(str.contains("=")) {
                i++;
                if(null != value && null != key) {
                    map.put(key,value);
                }
                key = str.substring(0,str.indexOf("="));
                value = str.substring(str.indexOf("=")+1,str.length());
                if(i == 3) {
                    map.put(key,value);
                } else {
                    continue;
                }
            } 
            value += str;
        }
        System.out.println(map);
    }