JDBC 连接数据库报错：java.lang.ExceptionInInitializerError

Question

数据库连接报错，仔细检查代码没有发现问题

 

代码部分

配置文件代码：dbconfig.properties

driverClassName=com.sql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/test
mysqlUsername=root
mysqlPassword=1234

 工具类：JdbcUtils.java

package cn.java.demo1;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

public class JdbcUtils {
	private static Properties prop = null;
	static {
		//加载配置文件
		prop = new Properties();
		InputStream in = JdbcUtils.class.getResourceAsStream("dbconfig.properties");
		try {
			prop.load(in);
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
		//加载驱动类
		
				try {
					
					Class.forName(prop.getProperty("driverClassName").trim());
				} catch (ClassNotFoundException e) {
					throw new RuntimeException(e);
				}
	}
	public static Connection getConnection() throws IOException, Exception,SQLException {
		//得到Connection
		return DriverManager.getConnection(prop.getProperty("url").trim(),prop.getProperty("mysqlUsername").trim(),prop.getProperty("mysqlPassword").trim());
	}
}

 测试类：Demo1.java

package cn.java.demo1;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;

public class Demo1 {
    public static void main(String[] args) throws IOException, SQLException, Exception {
		Connection conn = JdbcUtils.getConnection();
		System.out.println(conn);
	}
}

 请教一下各位大佬

 

Answer 1

这行代码读取配置文件失败。注意路径。

InputStream in = JdbcUtils.class.getResourceAsStream("dbconfig.properties");