47 lines
1.7 KiB
Java
47 lines
1.7 KiB
Java
package chapter10;
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import java.sql.Connection;
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import java.sql.ResultSet;
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import java.sql.Statement;
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import java.sql.DriverManager;
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public class Example01 {
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public static void main(String[] args) {
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try {
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// 1. 加载驱动
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Class.forName("com.mysql.cj.jdbc.Driver");
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// 2. 准备连接参数
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String url = "jdbc:mysql://localhost:3306/school?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC";
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String username = "root";
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String password = "root";
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// 使用try-with-resources自动关闭资源
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try (
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// 创建连接
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Connection connection = DriverManager.getConnection(url, username, password);
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// 创建语句对象
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Statement statement = connection.createStatement();
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// 执行查询获取结果集
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ResultSet resultSet = statement.executeQuery("select * from student")
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) {
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// 处理结果集
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while (resultSet.next()) {
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int id = resultSet.getInt("id");
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String name = resultSet.getString("name");
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int age = resultSet.getInt("age");
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String gender = resultSet.getString("gender");
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String className = resultSet.getString("class");
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System.out.println("id=" + id + ", name=" + name + ", age=" + age +
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", gender=" + gender + ", className=" + className);
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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