Java 读取Properties配置文件_import java.util.properti-优快云博客

本文链接：https://blog.youkuaiyun.com/chenyunqiang/article/details/81291920

本文介绍了一个使用Java加载属性文件(db.properties)并从中读取数据库连接信息的方法。通过静态初始化块，实现了从指定的属性文件中读取driver、url、username和password等关键信息，并打印这些配置信息。

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直接上代码:

import java.io.FileInputStream;
import java.util.Properties;

public class PropertiesTest {
    private static final String PROPERTIES_NAME = "db.properties";
    public static String DB_DRIVER = null;
    public static String DB_URL = null;
    public static String DB_USER = null;
    public static String DB_PWD = null;

    static{
        FileInputStream in = null;
        try{
            Properties properties = new Properties();
            in = new FileInputStream(PROPERTIES_NAME);
            properties.load(in);
            DB_DRIVER = properties.getProperty("driver");
            DB_URL = properties.getProperty("url");
            DB_USER = properties.getProperty("username");
            DB_PWD = properties.getProperty("passworld");
            System.out.println("读取配置信息成功！");
            showConfig();
        }catch(Exception e){
            e.printStackTrace();
            System.out.println("读取配置信息失败！");
        }finally{
            if(in != null){
                try{
                    in.close();
                }catch(Exception e){
                    e.printStackTrace();
                }
            }
        }
    }

    private static void showConfig(){
        System.out.println("-----------------------配置信息-----------------");
        System.out.println("dirver: "+DB_DRIVER);
        System.out.println("url: "+DB_URL);
        System.out.println("user: "+DB_USER);
        System.out.println("passworld: "+DB_PWD);
        System.out.println("----------------------------------------------");
    }

}