使用 MD5 密码问题的 Java mySQL 登录

Question

我遇到以下问题:我无法使用以下代码登录: 我没有收到任何语法错误，但我无法让 ' loginSuccess boolean 值变为真。代码和表格图片如下:

我什至尝试过等效的 VB.NET 查询类型，但没有成功:

Dim SqlQuery As String = "SELECT COUNT(*) From users1 WHERE username = @Username AND password = MD5(@Password); "

与

resultSet = statement.executeQuery("SELECT * FROM cards.username WHERE username = '" + username + "' AND password = ('MD5(" + password + ")'");

或

resultSet = statement.executeQuery("SELECT * FROM cards.username WHERE username = '" + username + "' AND password = MD5("' + password + ")'");

String sqlQuery = "select count(*) > 0 as match_found FROM username WHERE username = ? and password = MD5(?)";
// String sqlQuery = "select count(*) > 0 as cnt FROM username WHERE username = ? and password = MD5(?)";

PreparedStatement pst = connect.prepareStatement( sqlQuery );
pst.setString( 1, username );
pst.setString( 2, password );

ResultSet rs = pst.executeQuery();
boolean loginSuccess = false;
if( rs.next() ) {
  loginSuccess = rs.getBoolean( "match_found" );
  int cnt = rs.getInt(1);
  System.out.println(cnt);
}

if(loginSuccess)
    System.out.println("yess");
else
    System.out.println("noo");

Answer 1

问题出在我的密码 varchar 上，它是 10 并且加密没有足够的空间。将其提高到 50/100，现在我可以登录了。 谢谢