PropertiesUtil 读取配置文件工具类

package org.konghao.basic.util;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;

import org.apache.wicket.util.file.File;
import org.junit.Test;

public class PropertiesUtil {
    
    private static Properties properties;
    
    private String proper_resource;
    public void setProper_resource(String proper_resource) {
        this.proper_resource = proper_resource;
    }
    
    public PropertiesUtil(String proper_resource) {
        this.proper_resource = proper_resource;
    }

    public Map<String,String> getProperties(){
        properties = getInstance();
        try {
            InputStream inputStream = PropertiesUtil.class.getClassLoader().getResourceAsStream(proper_resource);
            properties.load(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
        Map<String,String> regMap = new HashMap<String, String>();
        regMap.put("appId", properties.getProperty("appId"));
        regMap.put("appsecret", properties.getProperty("appsecret"));
        regMap.put("base_url", properties.getProperty("base_url"));
        regMap.put("weixin_token", properties.getProperty("weixin_token"));
        return regMap;
    }
    
    public static Properties getInstance(){
        if(null == properties){
            properties = new Properties();
        }
        return properties;
    }
    
    public static Properties loadResource(String file){
        properties = getInstance();
        try {
            InputStream inputStream = PropertiesUtil.class.getClassLoader().getResourceAsStream(file);
            System.out.println(inputStream);
            if(properties != null){
                properties.load(inputStream);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return properties;
    }
    
    public static void main(String[] args) {
        PropertiesUtil pu = new PropertiesUtil("weixin_basic.properties");
        Map<String, String> propsMap = pu.getProperties();
        
        for(Entry<String, String> entry : propsMap.entrySet()) {
            System.out.println(("key: " + entry.getKey() + ", value: " + entry.getValue()));
        }
        
        Properties properties = loadResource("weixin_basic.properties");
        System.out.println(properties.getProperty("appId"));
    }
}