javaweb之eclipse工程连接mysql数据库

准备工作：

1.在mysql官网下载mysqlconnection的jar包

输入网址：mysql.com—点击DOWNLOADS——下拉选择MySQL Community (GPL) Downloads »——选择Connector/J——下载后解压——找到mysql-connector-java-8.0.22.jar

2.将mysql-connector-java-8.0.22.jar复制到当前javaweb工程

3.构建路径：右击当前项目——选择Build Path——Configure Build Path——Libraries——AddJARs——将之前复制在lib文件下的mysql-connection导入——Apply and Close

看到如下则成功：

4.在src中创建com.mysqlconnection包和mysqlconnection类

进行连接

public class mysqlconnect {

public static void main(String[] args) {

//判断驱动是否加载成功

try {

Class.forName("com.mysql.cj.jdbc.Driver"); //固定语法

System.out.print("成功加载驱动！");//提示语

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

System.out.print("加载驱动失败！");

e.printStackTrace();

}

//连接mysql

Connection con;

//localhost为主机名 3306为mysql的端口号 web：进行连接的目标数据库

String url = "jdbc:mysql://localhost:3306/web?serverTimezone=UTC";

//登录数据库用户名

String user = "root";

//登录数据库的密码

String password = "password";

try {

con = DriverManager.getConnection(url,user,password); //将参数传给驱动进行连接

if(!con.isClosed()) {

System.out.print("成功连接数据库！");

//创建statement对象

Statement statement = con.createStatement();

//声明一个sql语句查询student表中所有信息

String sql = "select * from student";

ResultSet rs = statement.executeQuery(sql);

//循环输出打印student表中的id name age

while (rs.next()){System.out.print(rs.getString("id"));

System.out.print("");

System.out.print(rs.getString("name"));

System.out.print("");

System.out.print(rs.getString("age"));

System.out.print("\t");}

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

标签：javaweb,rs,eclipse,System,String,mysql,print,out

来源： https://www.cnblogs.com/clinch/p/14229130.html