1.需要jar包的支持:
- java.sql
- javax.sql
- mysql-conneter-java...连接驱动(必须要导入)
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.46</version>
</dependency>
2.非安全型(未使用预编译)
public class TestJdbc {
public static void main(String[] args) throws ClassNotFoundException, SQLException {
String url = "jdbc:mysql://localhost:3306/jdbc?useUnicode=true&characterEncoding=utf-8";
String username = "root";
String password = "root";
//1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
//2.连接数据库
Connection connection = DriverManager.getConnection(url, username, password);
//3.向数据库发送SQL的对象Statement
Statement statement = connection.createStatement();
//4.编写SQL
String sql = "select * from users";
//5.查询SQL
ResultSet rs = statement.executeQuery(sql);
while(rs.next()){
System.out.println("id=" + rs.getObject("id"));
System.out.println("name=" + rs.getObject("name"));
System.out.println("password=" + rs.getObject("password"));
System.out.println("email=" + rs.getObject("email"));
System.out.println("birthday=" + rs.getObject("birthday"));
}
//6.关闭连接,释放资源
rs.close();
statement.close();
connection.close();
}
}
3.预编译型
public class TestJDBC2 {
public static void main(String[] args) throws ClassNotFoundException, SQLException {
String url = "jdbc:mysql://localhost:3306/jdbc?useUnicode=true&characterEncoding=utf-8";
String username = "root";
String password = "root";
//1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
//2.连接数据库
Connection connection = DriverManager.getConnection(url, username, password);
//3.编写SQL
String sql = "insert into users(id,name,password,email,birthday) values (?,?,?,?,?)";
//4.预编译
PreparedStatement preparedStatement = connection.prepareStatement(sql);
preparedStatement.setInt(1, 4);
preparedStatement.setString(2, "林");
preparedStatement.setString(3, "123456");
preparedStatement.setString(4, "123456@qq.com");
preparedStatement.setDate(5,new Date(new java.util.Date().getTime()));
//5.执行SQL
int i = preparedStatement.executeUpdate();
if(i>0){
System.out.println("插入成功");
}
//6.关闭连接,释放资源
preparedStatement.close();
connection.close();
}
}
原文地址:https://www.cnblogs.com/ls66666/p/16615705.html
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