[code]项目中属性读取封装

01 属性文件|env.properties

#Memcached 服务器地址
memcached.address=127.0.0.1:11211

02 spring-base.xml 摘要

<context:property-placeholder location="classpath:env.properties" />

03 SpringUtil.java

package com.xxx.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringUtil implements ApplicationContextAware {

	private static ApplicationContext applicationContext = null;

	@Override
	public void setApplicationContext(ApplicationContext appContext) throws BeansException {
		if (SpringUtil.applicationContext == null) {
			SpringUtil.applicationContext = appContext;
		}
		System.out.println("======ApplictionContext配置成功,在普通类可以用SpringUtils.getApplicationContext()获取上下文对象＝＝＝＝＝");
	}

	//获取applicationContext
    public static ApplicationContext getApplicationContext() {
       return applicationContext;
    }

    //通过name获取 Bean.
    public static Object getBean(String name){
       return getApplicationContext().getBean(name);
    }

    //通过class获取Bean.
    public static <T> T getBean(Class<T> clazz){
       return getApplicationContext().getBean(clazz);
    }

    //通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name,Class<T> clazz){
       return getApplicationContext().getBean(name, clazz);
    }
}

04 属性读取类|Env.java

package com.xxx.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class Env {

    private static final Logger log = LoggerFactory.getLogger(Env.class);

    private static Properties prop = getProperties();

    public static String get(String key) {
        return prop.getProperty(key);
    }

    public static Properties getProperties() {
        try {
            return (Properties) SpringUtil.getBean("env");
        } catch (Exception e) {
            Properties properties = new Properties();
            try {
                File file = new File(Env.class.getClassLoader().getResource("env.properties").getPath());
                InputStream inputStream = new FileInputStream(file);
                properties.load(inputStream);
                inputStream.close();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
            log.info("加载配置文件：");
            for (Object key : properties.keySet()) {
                log.info("key:{}\tvalue:{}", key, properties.get(key));
            }
            log.info("加载配置文件完毕。");
            return properties;
        }
    }

    public static void reLoad() {
        log.info("重新加载配置文件");
        prop = getProperties();
    }

}

05 使用|MemcacheManager.java

public class MemcacheManager {
    private static final Logger log = LoggerFactory.getLogger(MemcacheManager.class);
    static MemcachedClientBuilder builder = new XMemcachedClientBuilder(AddrUtil.getAddresses(Env.get("memcached.address")));
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