项目中的参数化配置

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
 
import com.retail.supmarket.http.controller.SweepCodePaymentController;
 
public class ReadFileUtil {
 
	/**
	 * 
	 * @Title: readFile 从properties文件中读取url的配置信息
	 * @Description: TODO String
	 * @author Administrator
	 */
	public static String readFile(String proper) {
		Properties properties = new Properties();
		// 使用ClassLoader加载properties配置文件生成对应的输入流
		InputStream in = SweepCodePaymentController.class.getClassLoader().getResourceAsStream("url.properties");
		// 使用properties对象加载输入流
		try {
			properties.load(in);
		} catch (IOException e) {
			System.out.println("请在配置中检查url的配置是否正确" + e);
			e.printStackTrace();
		}
		// 获取key对应的value值
		String getHttpProperty = properties.getProperty(proper);
		return getHttpProperty;
	}
}

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;
 
public class ReadFileUtil {
	private static final String DEFAULT_ENCODING = "UTF-8";
 
	/**
	 * 
	 * @Title: readFile 从properties文件中读取url的配置信息
	 * @Description: TODO String
	 * @author Administrator
	 */
	public static String readFile(String proper) {
		try {
			// 获取文件流（方法1或2均可）
			//InputStream inputStream = new BufferedInputStream(
					//new FileInputStream(new File("/src/main/resources/url.properties"))); // 方法1
			 InputStream inputStream =
			 Thread.currentThread().getContextClassLoader().getResourceAsStream("url.properties");
			// //方法2
			Properties prop = new Properties();
 
			prop.load(new InputStreamReader(inputStream, DEFAULT_ENCODING)); // 加载格式化后的流
 
			String driverClassName = prop.getProperty(proper);
			return driverClassName;
 
		} catch (FileNotFoundException e) {
			System.out.println("properties文件路径有误！");
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return proper;
	}
}

java读取资源参考博客：

https://www.cnblogs.com/shuimuzhushui/p/7247864.html

在jar文件下面读取：

https://www.cnblogs.com/TonyYPZhang/p/6298422.html

用类加载读取配置文件：

https://www.cnblogs.com/1540340840qls/p/6184109.html