Jdbc连接步骤
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Jdbc连接的步骤：
1.注册驱动：
有三种方式:（1）.DriverManager.registerDriver(new com.mysql.jdbc.Driver());
（2）.System.setProperty("jdbc.drivers", "com.mysql.jdbc.Driver");
（3）.Class.forName("com.mysql.jdbc.Driver");// 推荐方式
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2.创建连接：
String url = "jdbc:mysql://localhost:3306/sh";
String user = "root";
String password = "root";
Connection conn = DriverManager.getConnection(url, user, password);
3.创建语句：
Statement st = conn.createStatement();
4.执行语句：
ResultSet rs = st.executeQuery("select * from student");
5.处理结果集：
while (rs.next()) {
System.out.println(rs.getObject(1) + "\t" + rs.getObject(2) );
}
6.释放资源：
rs.close();
st.close();
conn.close();
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源代码：
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package com.lzw;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class Base {
public static void main(String[] args) throws Exception {
test();
}
static void test() throws SQLException, ClassNotFoundException {
// 1.注册驱动
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//System.setProperty("jdbc.drivers", "com.mysql.jdbc.Driver");
//Class.forName("com.mysql.jdbc.Driver");// 推荐方式
// 2.建立连接
String url = "jdbc:mysql://localhost:3306/sh";
String user = "root";
String password = "root";
Connection conn = DriverManager.getConnection(url, user, password);
// 3.创建语句
Statement st = conn.createStatement();
// 4.执行语句
ResultSet rs = st.executeQuery("select * from student");
// 5.处理结果
while (rs.next()) {
System.out.println(rs.getObject(1) + "\t" + rs.getObject(2) );
}
// 6.释放资源
rs.close();
st.close();
conn.close();
}
}
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