JAVA操作Mysql数据库

String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://127.0.0.1:3306/phpdb";
String u = "root";
String p = "sa123456";

try {
Class.forName(driver);
Connection con = DriverManager.getConnection(url,u,p);
if(!con.isClosed()){
System.out.println("链接成功...");
Statement statement = con.createStatement();
String sql = "select * from articles";
String insertSql = "insert into articles(title,content) values(?,?)";
//执行查询操作
ResultSet rs = statement.executeQuery(sql);

PreparedStatement ps = con.prepareStatement(insertSql);
ps.setString(1, "哈哈哈1111");
ps.setString(2, "写入数据成功啦....");
//执行增、删、改操作
ps.executeUpdate();

while(rs.next()){
System.out.println(rs.getString("content"));
}
rs.close();
con.close();
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}