java读取配置文件Properties

一、spring标签读取

@Value读取properties文件并转成map

import lombok.Data;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
import java.io.InputStream;
import java.util.*;

/**
 * Created by qxr4383 on 2019/6/4.
 */
@Component
@Data
public class WeatherPropertiesInit {
    @Value("classpath:zh_CN.properties")
    private Resource zhResource;
    private static Map<String, String> weather_zh;
    @PostConstruct
    public void initWeatherProperties() throws Exception {
        try{
            Properties properties = new Properties();
            properties1.load(zhResource.getInputStream());
            weather_zh = new HashMap<String, String>((Map) properties1);
        } catch (Exception e) {
            log.error("news categories init error {} ", e);
        }
    }
}

二、java代码读取

代码实例：

package com.self.cn.weather.env;
import org.apache.log4j.Logger;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class ServerEnvironment {
  private static String apiUser = null;
  private static String apiKey = null;
  private static String apiGateway = null;
  private static String sessionUrl = null;
  private static Properties weatherMap = null;

  static {
    Properties properties = new Properties();
    InputStream input = null;

    ClassLoader classLoader = ServerEnvironment.class.getClassLoader();
    try {
	  //根目录路径
      System.out.println(ServerEnvironment.class.getResource("").getPath());
      input = new FileInputStream(classLoader.getResource("configWeather.properties").getFile());
      //input = new FileInputStream(classLoader.getResource("com/self/cn/weather/env/configWeather2.properties").getFile());
      //获取class下指定文件夹中的配置文件
      //方式一
      //input = ServerEnvironment.class.getResourceAsStream("/properties/jdbc.properties");
      //方式为
      //input = new FileInputStream(classLoader.getResource("properties/jdbc.properties").getFile());
      properties.load(input);
      input.close();
    } catch (IOException e) {
      Logger.getLogger(ServerEnvironment.class).fatal("No Config file!", e);
    }

    ServerEnvironment.apiUser = properties.getProperty("api.user");
    ServerEnvironment.apiKey = properties.getProperty("api.key");
    ServerEnvironment.apiGateway = properties.getProperty("api.gateway");
    ServerEnvironment.apiGateway = properties.getProperty("api.gateway");
    ServerEnvironment.sessionUrl = properties.getProperty("id5.servlet.session");

    InputStream mapInput = null;
    try {
      mapInput = new FileInputStream(classLoader.getResource("weather_map.properties").getFile());
      weatherMap = new Properties();
      weatherMap.load(mapInput);
      mapInput.close();
    } catch (IOException e) {
      Logger.getLogger(ServerEnvironment.class).fatal("No Weather Map file!", e);
    }
  }

	  public static String getApiUser() {
	    return apiUser;
	  }
	
	  public static String getApiKey() {
	    return apiKey;
	  }
	
	  public static String getApiGateway() {
	    return apiGateway;
	  }
	
	  public static String getSessionUrl() {
	    return sessionUrl;
	  }
	
	  public static Properties getWeatherMap() {
	    return weatherMap;
	  }
	  
	  public static void main(String[] args) {
		System.out.println(ServerEnvironment.getApiUser());
	}

}

文件路径：

##二 方法类 ##