java - 删除用户选择的记录？

Question

我在编码

String Name = txtName.getText();
String Surname = txtSurname.getText();  
st.executeUpdate("DELETE from list WHERE Name=@Name and Surname=@Surname");

但它不会删除记录。语法有问题吗？请帮忙。

Answer 1

您需要用实际值替换@name和。@surname

并添加'您的价值观：

DELETE from list WHERE Name='@Name' and Surname='@Surname'


String Name = txtName.getText().Trim();
String Surname = txtSurname.getText().Trim();  
String query = "DELETE from list WHERE Name='" + Name + "' and Surname='" + Surname + "'";
st.executeUpdate(query);

Answer 2

尝试：

st.executeNonQuery("DELETE from list WHERE Name=?e and Surname=?");

并将姓名和姓氏作为参数传递。

Answer 3

用这个

如果表列表存在。

这将起作用。

String Name = txtName.getText();
String Surname = txtSurname.getText();  


st.executeUpdate("DELETE from list WHERE Name='"+Name"' and Surname='"+Surname"'");

我这样修复它：

st.executeUpdate("DELETE from list WHERE Name='"+txtName.getText()+"'" + "and Surname='" + txtSurname.getText()+"'");

谢谢你们