Question

我正在使用Netbeans，在这个方法中我有som String和int变量，我想在MySQL数据库中插入。

我试过这个，但它仍然没有用。

String sql = "INSERT INTO cars (Manufacturer, Color, Extra, Country, Price)" "VALUES (variableManufacturer, variableColor, variableExtra, variableCountry, variablePrice)";

表名汽车

Colummns Manufacturer, Color, Extra, Country, Price

所有colummns都是VARCHAR，除了Price，它是一个int。

Netbeans崩溃了，它说无法找到变量。任何人吗？

Answer 1

试试这个

String sql = "INSERT INTO cars(Manufacturer, Color, Extra, Country, Price) VALUES(variableManufacturer, variableColor, variableExtra, variableCountry, variablePrice)";

<强>更新

我认为此链接可以帮助您

Inserting records into a MySQL table using Java

Answer 2

试试这个：

String sql = "INSERT INTO cars (Manufacturer, Color, Extra, Country, Price)";

sql + = "  VALUES (variableManufacturer, variableColor, variableExtra, variableCountry, variablePrice)";

Answer 3

试试这个：）

String sql = "INSERT INTO cars (Manufacturer, Color, Extra, Country, Price) "
+ "VALUES ('"+variableManufacturer+"', '"+variableColor+"',
           '"+variableExtra+"', '" +variableCountry +"', 
           "+variablePrice+")";

Answer 4

您正在寻找的是Java中的PreparedStatement。

喜欢的东西;

PreparedStatement ps = connection.prepareStatement("INSERT INTO cars (Manufacturer, Color, Extra, Country, Price) VALUES (?,?,?,?,?)");

然后，您将ps.SetXX()方法与变量一起使用，在您的情况下为VARCHAR我认为属于String转化类型：JDBC - How to set char in a prepared statement

MySQL查询INSERT in Java

4 个答案: