java 读取项目中的和磁盘上的properties文件_java读取磁盘下面properties文件-优快云博客

本文链接：https://blog.youkuaiyun.com/z_p_h/article/details/7432967

该博客介绍如何在Java中读取项目内的以及磁盘上的properties配置文件。提供了`readFromProject`方法从项目资源中获取`ResourceBundle`对象，以及`readFromSystemFile`方法从磁盘加载`Properties`对象。示例代码展示了读取并打印配置文件内容的过程。

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

/**
 * 
 * <b>Application name:</b><br>
 * <b>Application describing:</b> <br>

 */
public class PropertiesUtil
{
    /**
     * 
     * {读取项目中的properties配置文件}<br>
     * 返回的是ResourceBundle的对象
     * 
     * @param propertiesPath
     * @return
     */
    public static ResourceBundle readFromProject(String propertiesFilePath)
    {
        return ResourceBundle.getBundle(propertiesFilePath);
    }

    /**
     * 
     * {读取磁盘上的properties配置文件}<br>
     * 返回的市Properties的对象
     * @param propertiesFilePath
     * @return
     */
    public static Properties readFromSystemFile(String propertiesFilePath)
    {
        InputStream is = null;
        Properties properties = null;
        try
        {
            is = new FileInputStream(propertiesFilePath);
            properties = new Properties();
            properties.load(is);

        }
        catch (FileNotFoundException e)
        {
            System.out.println("没有找到文件");
            e.printStackTrace();
        }
        catch (IOException e)
        {
            System.out.println("读取properties文件失败");
            e.printStackTrace();
        }
        finally
        {
            if (is != null)
            {
                try
                {
                    is.close();
                }
                catch (IOException e)
                {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        return properties;
    }

    /**
     * 
     * {主函数}
     * 
     * @param args
     */
    public static void main(String[] args)
    {
        //ResourceBundle resourceBundle = readFromProject("db1");

        ResourceBundle resourceBundle = readFromProject("com.neusoft.config.db");
        String username = resourceBundle.getString("username");
        String password = resourceBundle.getString("password");
        String url = resourceBundle.getString("url");
        String driverClassName = resourceBundle.getString("driverClassName");
        System.out.println(username);
        System.out.println(password);
        System.out.println(url);
        System.out.println(driverClassName);

        String filePath = "c:" + File.separator + "test" + File.separator + "config.properties";
        Properties properties = readFromSystemFile(filePath);
        String base = properties.getProperty("base");
        String step = properties.getProperty("step");
        System.out.println(base + " " + step);
    }
}