Java工具类--读取Properties文件

女爷i 2022-05-10 06:16 204阅读 0赞

package com.skr.mdm.util;
    
    import net.sf.json.JSONArray;
    import net.sf.json.JSONObject;
    
    import java.io.InputStreamReader;
    import java.util.*;
    
    /**
     * 读取配置文件的工具类
     */
    
    public class PropertiesUtil {
    
        private Properties props;
    
        public PropertiesUtil(String fileName) {
            readProperties(fileName);
        }
    
        /**
         * 加载配置文件
         *
         * @param fileName
         */
        private void readProperties(String fileName) {
            try {
                props = new Properties();
                InputStreamReader inputStream = new InputStreamReader(
                        this.getClass().getClassLoader().getResourceAsStream(fileName), "UTF-8");
                props.load(inputStream);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
        /**
         * 根据key读取对应的value
         *
         * @param key
         * @return
         */
        public String get(String key) {
            return props.getProperty(key);
        }
    
        /**
         * 得到所有的配置信息
         *
         * @return
         */
        public Map<String, String> getAll() {
            Map<String, String> map = new HashMap<String, String>();
            Enumeration<?> enu = props.propertyNames();
            while (enu.hasMoreElements()) {
                String key = (String) enu.nextElement();
                String value = props.getProperty(key);
                map.put(key, value);
            }
            return map;
        }
    
        /**
         * 得到所有的配置信息
         *
         * @return
         */
        public List<String> keyList() {
            List<String> keyList = new ArrayList<>() ;
            Enumeration<?> enu = props.propertyNames();
            while (enu.hasMoreElements())
                keyList.add((String) enu.nextElement()) ;
            return keyList;
        }
    
        public static void main(String[] args) {
            PropertiesUtil propertiesUtil = new PropertiesUtil("MDMTag.properties") ;
            System.out.println(JSONObject.fromObject(propertiesUtil.getAll())) ;
            System.out.println(JSONArray.fromObject(propertiesUtil.keyList())) ;
        }
    
    }

转至：[https://blog.csdn.net/frankcheng5143/article/details/50432820?locationNum=10][https_blog.csdn.net_frankcheng5143_article_details_50432820_locationNum_10]

[https_blog.csdn.net_frankcheng5143_article_details_50432820_locationNum_10]: https://blog.csdn.net/frankcheng5143/article/details/50432820?locationNum=10