JDBC连接数据库代码 （一） -- 一个简单的获取数据库表单

具体实例：

package com.nenu.www;

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

import java.sql.Statement;

public class JdbcConn {

public static void main(String[] args) {

try {
Class.forName("com.mysql.jdbc.Driver");//导入驱动（jar包）
} catch (ClassNotFoundException e) {
e.printStackTrace();
}

Connection conn = null;
try {
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");//建立连接
} catch (SQLException e) {
e.printStackTrace();
}

String sql = "select name,email,dob from student";//建立SQL语句

try {
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql);
//cursor
while(rs.next()){
String name = rs.getString(1);
String email = rs.getString(2);
String dob = rs.getString(3);
System.out.println(name+" , "+email+" , "+dob);

}
} catch (SQLException e) {
e.printStackTrace();
}finally{
if(conn!=null)
try {
conn.close();//关闭连接
} catch (SQLException e) {
e.printStackTrace();
}
}

}
}

Enter password: ****
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.6.21-log MySQL Community Server (GPL)

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> use localhost database
Database changed
mysql> select * from test
-> ;
ERROR 1146 (42S02): Table 'localhost.test' doesn't exist
mysql> use test database
Database changed
mysql> select * from student;
+---------+--------+-----------+------------+
| stud_id | name   | email     | dob        |
+---------+--------+-----------+------------+
|       1 | 哈哈   | 198493290 | 2017-12-13 |
|       2 | 李zz   | 343908409 | 2017-12-13 |
|       3 | zzzz   | 398479284 | 2017-12-13 |
+---------+--------+-----------+------------+
3 rows in set (0.00 sec)

mysql>