【Properties】获取Properties文件

获取Properties文件

package com.chinamobile.epic.tako.v2.query.commons;

import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;

import java.io.*;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.ConcurrentHashMap;

public class PropertiesUtilsBase {

    /**
     * 获取属性文件
     * @param path example: c:\\my.properties
     * @return
     */
    public static Properties loadFromFileSystem(String path) {
        Properties props = new Properties();
        try {
            File file = new File(path);
            InputStream in = new BufferedInputStream(new FileInputStream(file));

            //解决中午乱码问题--因为字节流无法读取中文，所以采用reader把inputStream转换成reader用字符流来读取中文
            BufferedReader bf = new BufferedReader(new InputStreamReader(in));
            props.load(bf);
            in.close();
        } catch (Exception e) {
            return null;
        }
        return props;
    }

    /**
     * 从classpath中获取属性文件
     *
     * @param path graphite/graphiteTargets.properties
     * @return
     */
    public static Properties loadFromClassPath(String path) {
        Resource resource = new ClassPathResource(path);
        Properties prop = null;
        try {
            prop = PropertiesLoaderUtils.loadProperties(resource);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return prop;
    }

    public static Map<String, String> asMap(Properties properties) {
        if (properties == null) {
            return null;
        }

        Map<String, String> entryMap = new ConcurrentHashMap<String, String>();

        for (Map.Entry<Object, Object> entry : properties.entrySet()) {
            String key = entry.getKey().toString();
            String value = entry.getValue().toString();
            entryMap.put(key, value);
        }
        return entryMap;
    }

    /**
     * 显示所有key，value
     *
     * @param properties
     */
    public static void showKeysAndValues(Properties properties) {
        if (properties == null) {
            System.out.println("properties == null");
            return;
        }
        Iterator<Map.Entry<Object, Object>> it = properties.entrySet().iterator();

        System.out.println("======下面将显示所有<key,value>值---方式1============");
        while (it.hasNext()) {
            Map.Entry<Object, Object> entry = it.next();
            Object key = entry.getKey().toString();
            Object value = entry.getValue();
            System.out.println("<" + key + "," + value + ">");
        }
    }
}

---

使用@Bean方式获取Properties

   @Bean
    public Properties quartzProperties() throws IOException {
        PropertiesFactoryBean propertiesFactoryBean = new PropertiesFactoryBean();
        propertiesFactoryBean.setLocation(new ClassPathResource("/quartz.properties"));
        propertiesFactoryBean.afterPropertiesSet();
        return propertiesFactoryBean.getObject();
    }