Java连接数据库出现空指针

Question

数据库连接成功了，但在用preparedstatement连接时出现空指针

package edu.hebeu.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class GetConn {
    Connection conn=null;
    public Connection getConnection()  {
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            String ur1="jdbc:mysql://localhost:3306/sjk?serverTimezone=UTC&useSSL=false";
            Connection conn=DriverManager.getConnection(ur1, "root","root");
            if(conn!=null)
            {
                System.out.println("数据库连接成功！");
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return conn;
    }
    
}

Answer 1

把findLastUser方法里面第一句加上conn=getConnection()即可