JDBC连接数据库 | 易学教程

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

/**
 * @author Cris
 * @version 1.0
 * @className TestJDBC
 * @description <功能描述>
 * @date 2020/1/30 18:53
 */
public class TestJDBC {
    private static final String URL = "jdbc:mysql://localhost:3306/emp";
    private static final String USER = "root";
    private static final String PASSWORD = "123456";
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        //注册驱动
        Class.forName("com.mysql.jdbc.Driver");
        //获取连接对象
        Connection conn = DriverManager.getConnection(URL,USER,PASSWORD);
        //获取Statement对象
        Statement st = conn.createStatement();
        String sql = "update employee set name = '周扒皮' where id = 5";
        //执行sql
        int i = st.executeUpdate(sql);
        System.out.println(i>0?"修改成功":"修改失败");
        //关闭连接
        st.close();
        conn.close();
    }
}

结果：

E:\Java\jdk\bin\java.exe "-javaagent:E:\IntelliJ IDEA 2018.2.4\lib\idea_rt.jar=53570:E:\IntelliJ IDEA 2018.2.4\bin" -Dfile.encoding=UTF-8 -classpath E:\Java\jdk\jre\lib\charsets.jar;E:\Java\jdk\jre\lib\deploy.jar;E:\Java\jdk\jre\lib\ext\access-bridge-64.jar;E:\Java\jdk\jre\lib\ext\cldrdata.jar;E:\Java\jdk\jre\lib\ext\dnsns.jar;E:\Java\jdk\jre\lib\ext\jaccess.jar;E:\Java\jdk\jre\lib\ext\jfxrt.jar;E:\Java\jdk\jre\lib\ext\localedata.jar;E:\Java\jdk\jre\lib\ext\nashorn.jar;E:\Java\jdk\jre\lib\ext\sunec.jar;E:\Java\jdk\jre\lib\ext\sunjce_provider.jar;E:\Java\jdk\jre\lib\ext\sunmscapi.jar;E:\Java\jdk\jre\lib\ext\sunpkcs11.jar;E:\Java\jdk\jre\lib\ext\zipfs.jar;E:\Java\jdk\jre\lib\javaws.jar;E:\Java\jdk\jre\lib\jce.jar;E:\Java\jdk\jre\lib\jfr.jar;E:\Java\jdk\jre\lib\jfxswt.jar;E:\Java\jdk\jre\lib\jsse.jar;E:\Java\jdk\jre\lib\management-agent.jar;E:\Java\jdk\jre\lib\plugin.jar;E:\Java\jdk\jre\lib\resources.jar;E:\Java\jdk\jre\lib\rt.jar;F:\IdeaProjects\testJDBC_22\out\production\testJDBC_22;F:\IdeaProjects\testJDBC_22\lib\mysql-connector-java-5.1.36-bin.jar TestJDBC
修改成功

Process finished with exit code 0

来源：CSDN

作者：Cris28797

链接：https://blog.csdn.net/Cris_Ronaldo/article/details/104117792

标签

jdbc

JDK

jre

lib

string