定義

package com.wp.tool;

import java.util.Date;
import java.util.HashMap;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

/**
 * 資原始檔讀取工具
 * @author pengwu7
 * @date 2017年9月7日
 */
public class PropertiesFileUtil {

    // 當開啟多個資原始檔時，快取資原始檔
    private static HashMap<String, PropertiesFileUtil> configMap = new HashMap<String, PropertiesFileUtil>();
    // 開啟檔案時間，判斷超時使用
    private Date loadTime = null;
    // 資原始檔
    private ResourceBundle resourceBundle = null;
    // 預設資原始檔名稱
    private static final String NAME = "config";
    // 快取時間
    private static final Integer TIME_OUT = 60 * 1000;

    // 私有構造方法，建立單例
    private PropertiesFileUtil(String name) {
        this.loadTime = new Date();
        this.resourceBundle = ResourceBundle.getBundle(name);
    }

    public static synchronized PropertiesFileUtil getInstance() {
        return getInstance(NAME);
    }

    public static synchronized PropertiesFileUtil getInstance(String name) {
        PropertiesFileUtil conf = configMap.get(name);
        if (null == conf) {
            conf = new PropertiesFileUtil(name);
            configMap.put(name, conf);
        }
        // 判斷是否開啟的資原始檔是否超時1分鐘
        if ((new Date().getTime() - conf.getLoadTime().getTime()) > TIME_OUT) {
            conf = new PropertiesFileUtil(name);
            configMap.put(name, conf);
        }
        return conf;
    }

    // 根據key讀取value
    public String get(String key) {
        try {
            String value = resourceBundle.getString(key);
            return value;
        }catch (MissingResourceException e) {
            return "";
        }
    }

    // 根據key讀取value(整形)
    public Integer getInt(String key) {
        try {
            String value = resourceBundle.getString(key);
            return Integer.parseInt(value);
        }catch (MissingResourceException e) {
            return null;
        }
    }

    // 根據key讀取value(布林)
    public boolean getBool(String key) {
        try {
            String value = resourceBundle.getString(key);
            if ("true".equals(value)) {
                return true;
            }
            return false;
        }catch (MissingResourceException e) {
            return false;
        }
    }

    public Date getLoadTime() {
        return loadTime;
    }

}
 

使用

PropertiesFileUtil.getInstance("config").get("xxx");
PropertiesFileUtil.getInstance().get("xxx");