读取.properties配置文件里面的内容工具类

待我称王封你为后i 2021-07-09 10:33 448阅读 0赞

读取配置文件的信息，可方便修改，配置文件为com.properties，

package com.suncreate.pahfpt.web.utils;
    
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.Properties;
    
    public abstract class PropertiesUtils
    {
        
        private static Properties properties = null;
        
        static
        {
            properties = loadProperty();
        }
        
        private static Properties loadProperty()
        {
            Properties p = new Properties();
            try
            {
                p.load(getInputStream("com.properties"));
                if (p == null || p.isEmpty())
                {
                    System.out.println("The property file cannot be load");
                }
            }
            catch (IOException e)
            {
                System.out.println("Exception happened in loadProperty()" + e);
            }
            
            return p;
        }
        
        public static String getValue(String key)
        {
            if (properties.containsKey(key))
            {
                String value = properties.getProperty(key);
                if (isValue(value))
                {
                    value = value.trim();
                }
                
                return value;
            }
            else
            {
                return "";
            }
        }
        
        public static boolean isBlank(String str)
        {
            if (str == null || str.isEmpty() || (str.trim()).isEmpty() || str.equals("") || str.trim().equals("")
                || str.equals("null") || str.trim().equals("null"))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        
        public static boolean isValue(String str)
        {
            return !isBlank(str);
        }
        
        private static InputStream getInputStream(String path)
            throws IOException
        {
            InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(path);
            
            if (is == null)
            {
                throw new FileNotFoundException(path + " cannot be opened because it does not exist");
            }
            
            return is;
        }
    }

代码如上，使用方式

String bh = PropertiesUtils.getValue("Code");//获取编号

直接在程序中新建字符串，然后直接读取配置文件的数据。