Oracle 专业认证 JavaSE8 编程测验

以下是针对题目中给出的代码的解决方案，这个解决方案是针对如何在Oracle数据库中使用Java代码来处理数据并进行测验的情况。

import java.sql.*;
import java.util.ArrayList;
import java.util.List;
 
public class OracleJavaTest {
 
    public static void main(String[] args) {
        // 连接数据库
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
 
        try {
            // 加载Oracle JDBC驱动
            Class.forName("oracle.jdbc.driver.OracleDriver");
 
            // 建立连接
            conn = DriverManager.getConnection(
                    "jdbc:oracle:thin:@localhost:1521:xe", "username", "password");
 
            // 创建SQL语句
            String sql = "SELECT * FROM employees";
 
            // 执行查询
            pstmt = conn.prepareStatement(sql);
            rs = pstmt.executeQuery();
 
            // 处理结果集
            List<Employee> employees = new ArrayList<>();
            while (rs.next()) {
                Employee emp = new Employee();
                emp.setId(rs.getInt("id"));
                emp.setName(rs.getString("name"));
                emp.setSalary(rs.getDouble("salary"));
                employees.add(emp);
            }
 
            // 打印结果
            for (Employee emp : employees) {
                System.out.println("ID: " + emp.getId() + ", Name: " + emp.getName() + ", Salary: " + emp.getSalary());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            try {
                if (rs != null) {
                    rs.close();
                    rs = null;
                }
                if (pstmt != null) {
                    pstmt.close();
                    pstmt = null;
                }
                if (conn != null) {
                    conn.close();
                    conn = null;
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
 
    static class Employee {
        private int id;
        private String name;
        private double salary;
 
        public int getId() {
            return id;
        }
 
        public void setId(int id) {
            this.id = id;
        }
 
        public String getName() {
            return name;
        }
 
        public void setName(String name) {
            this.name = name;
        }
 
        public double getSalary() {
            return salary;