jdbc测试mysql

Java jdbc测试mysql数据库代码。

工具 eclipse，jdk1.8，mysql

注意：要配置mysql.jar

---

import java.sql.SQLException;

/**

* @author lengol

*

*/

public class TestMysql {

/**

* @param args

* @throws SQLException

*/

public static void main(String[] args) throws SQLException {

//1.注册驱动

try {

Class.forName("com.mysql.jdbc.Driver");

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

//2.创建数据库的连接

//useUnicode=true&characterEncoding=GBK：支持中文

java.sql.Connection conn = java.sql.DriverManager.getConnection(

"jdbc:mysql://localhost/lesson?useUnicode=true&characterEncoding=utf8",

"root", "      ");

//3获取表达式SQL

java.sql.Statement stmt = conn.createStatement();

//4.执行SQL

String sql = "select * from study";

java.sql.ResultSet res = stmt.executeQuery(sql);

//5.打印结果集里的数据

while(res.next()) {

System.out.print("the id: ");

System.out.println(res.getInt(1));

System.out.print("the username: ");

System.out.println(res.getString("username"));

System.out.print("the class: ");

System.out.println(res.getString("sex"));

System.out.println();

}

//测试插入数据库的功能：

//String inSql = "insert into test(user,addr) values('插入2','新地址2')";

//stmt.executeUpdate(inSql);

//6.释放资源，关闭连接（这是一个良好的习惯）

res.close();

stmt.close();

conn.close();

}

}