PropertiesUtils

Properties properties = PropertiesLoaderUtils.loadProperties(new ClassPathResource("properties/statusMapping.properties")); //path   springboot --> resource/properties/statusMapping.properties

// 解决中文乱码问题:

Properties properties = PropertiesLoaderUtils.loadProperties(new EncodedResource(new ClassPathResource("exchangeRate.properties"),"UTF-8"));

System.err.println(properties);

Properties properties1 = new Properties();
// 使用ClassLoader加载properties配置文件生成对应的输入流
properties1.load(new InputStreamReader(this.getClass().getClassLoader().getResourceAsStream("exchangeRate.properties"), "UTF-8"));

package com.icil.elsa.subscribe.milestone.common.utils;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;

/**
 * *************************************************************************
 * <PRE>
 *  @ClassName:    : PropertiesUtils 
 *
 *  @Description:    : 
 *
 *  @Creation Date   : 17 Jan 2019 5:28:06 PM
 *
 *  @Author          :  Sea
 *  
 *
 * </PRE>
 **************************************************************************
 */
public class PropertiesUtils {

    /**
     * 
     * @param path
     * @param key
     * @return
     */
    public static String getProperty(String path, String key) {
        Properties properties = new Properties();
        String value = "";
        try {
            synchronized (properties) {
                InputStream in = new BufferedInputStream(new FileInputStream(path));
                properties.load(in);
            }
            value = (String) properties.get(key);
        } catch (FileNotFoundException e1) {

            e1.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return value;

    }
    
    
    /**
     * 
     * @param path
     * @param key
     * @param value
     */
    public static void updateProperty(String path, String key, String value) {
        Properties properties = new Properties();
        //String profilepath = PropertiesUtils.class.getResource("/").getPath() + path;//nosonar
        try {
            InputStream in = new BufferedInputStream(new FileInputStream(path));
            properties.load(in);
            OutputStream fos = new FileOutputStream(path);
            properties.setProperty(key, value);
            properties.store(fos, "Update value");
            fos.flush();
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static Properties getProperties(String path) {

        Properties properties = new Properties();
        try {
            synchronized (properties) {
                InputStream in = new BufferedInputStream(new FileInputStream(path));
                properties.load(in);
            }
        } catch (IOException e) {
            return null;
        }

        return properties;
    }
    
    
    /**
     * 
     * @param path
     * @param key
     * @return
     */
    public static String getPropertiesOnServer(String path, String key) {
        Properties properties = new Properties();
        String value = "";
        try {
            InputStream in = new BufferedInputStream(new FileInputStream(path));
            properties.load(in);
            value = (String) properties.get(key);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return value;
    }
    
}