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学习记录：复习
JDBC简单链接数据库
/** 关闭资源用 */
Connection conn = null;
Statement stmt = null;
ResultSet rest = null;
/** 设置url,user,password,sql */
String url = "jdbc:mysql://localhost:3306/kevin?useUnicode=true&characterEncoding=utf-8";
String user = "root";
String password = "123456";
String sql = "select * from blog";
try
{
// 注册驱动
Class.forName("com.mysql.jdbc.Driver");
// 获得数据库链接
conn = DriverManager.getConnection(url, user, password);
// 获得Statement
stmt = conn.createStatement();
rest = stmt.executeQuery(sql);
while (rest.next())
{
System.out.println(rest.getString("title") + "_" + rest.getString("viceTitle"));
}
} catch (Exception e)
{
System.err.println("发生异常："+e);
} finally
{//关闭资源
rest.close();
stmt.close();
conn.close();
}
关闭资源放在finally中
