问题:java.sql.SQLException: No value specified for parameter 1
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问题:java.sql.SQLException: No value specified for parameter 1
= req.getParameter("pwd");
Connection conn = DbUtil.getCon();
String sql = "select name from user where name=? and password=?";
PreparedStatement pst = conn.prepareStatement(sql);
pst.setString(1, user);
pst.setString(2, pwd);