我向你们提出一个小问题。
我尝试将用户添加到数据库。
用户具有以下字段:id,name,surname等。
方法
public static String insertUsertoDatabase(Connection con, User userToAdd)
做这样的事情
// the mysql insert statement
String query = " insert into User (id,log,pass)"
+ " values (?, ?, ?)";
// create the mysql insert preparedstatement
PreparedStatement preparedStmt = con.prepareStatement(query);
preparedStmt.setInt(1, 1);
preparedStmt.setString(2, "h");
preparedStmt.setString(3, "l");
setUser方法
public String setUser(User userToBase) {
return insertUsertoDatabase(con, userToBase);
}
和main.java
User us1 = new User("9", "h", "l");
db.setUser(us1); //insert to database User u1
如何将User构造函数中的值放入preparedStmt?
我有一个像这样的构造函数:
public class User(id, login, pass) {
this.id = id;
etc.
}
但我想知道如何从构造函数
发送数据User us1 = new User("9", "h", "l");
到我的方法
public static String insertUsertoDatabase(Connection con, User userToAdd)
preparedStmt.setInt(1, 9); <------------- from User constructor
preparedStmt.setString(2, "h");
preparedStmt.setString(3, "l");
答案 0 :(得分:0)
你可能需要这样的东西:
// TODO: use meaningful names
private String pim;
private String pam;
private String poom;
public User(String pim, String pam, String poom) {
this.pim = pim;
this.pam = pam;
this.poom = poom;
}
public String getPim() {
return this.pim;
}
// ...
然后:
User usr1 = new User("9", "h", "l");
usr1.getPim() // = "9"
// ...