java 读取项目中文件属性

待我称王封你为后i 2022-02-12 10:16 252阅读 0赞

### java 读取项目中文件属性最简单的一种方法，其他方法自行百度 ###

package com.xxx;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import java.io.*;
    import java.util.Properties;
    
    public class PropertyUtil {
    
        private static Logger logger = LoggerFactory.getLogger(PropertyUtil.class);
    
        private static Properties props;
    
        public static Properties getConfig(String fileName){
            props = new Properties();
            InputStream in;
            BufferedReader bf = null;
            try{
    
                // 第一种，通过类加载器进行获取properties文件流 fileName("resource/resource.properties")
                in = PropertyUtil.class.getClassLoader().getResourceAsStream(fileName);
    
                // 第二种，通过类进行获取properties文件流 filePathe("/resource/resource.properties"),前边多一个 '/'
                //in = PropertyUtil.class.getResourceAsStream("/resource/resource.properties");
    
                if (in != null) {
                    bf = new BufferedReader(new InputStreamReader(in));
                }
                props.load(bf);
    
            } catch (FileNotFoundException e) {
                logger.error(fileName+"文件未找到");
            } catch (IOException e) {
                logger.error("出现IOException");
            }finally {
                if(null != bf){
                    try {
                        bf.close();
                    } catch (IOException e) {
                        logger.error("jdbc.properties文件流关闭出现异常");
                    }
                }
            }
            return props;
        }
    
        public static String getProperty(String fileName,String key){
            if(null == props) {
                getConfig(fileName);
            }
            return props.getProperty(key);
        }
    
    
        public static void main(String[] args){
            //Properties prop = PropertyUtil.getConfig("classpath:resource/resource.properties");
            //String url = prop.getProperty("ZHL_URL");
            String url = PropertyUtil.getProperty("resource/resource.properties", "ZHL_URL");
                    System.out.println(url);
        }
    }