[英]How to insert values in mysql database if one of the column is auto increment using prepared statement
public String put(){
this.query = "INSERT INTO user_registration VALUES('default', '?' , '?' , '?' , '?' , '?' );";
try {
PreparedStatement stmt= Main.connection.prepareStatement(query);
stmt.setString(1,this.fullname);
stmt.setString(2,this.username);
stmt.setString(3,this.password);
stmt.setString(4,this.email);
stmt.setString(5,this.contact);
stmt.executeUpdate();
return String.valueOf(SignupStatus.SUCCESS);
} catch (SQLException e) {
e.printStackTrace();
System.out.println(e);
return String.valueOf(SignupStatus.FAILED);
}
}
我收到此异常:
java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
at com.mysql.cj.jdbc.ClientPreparedStatement.checkBounds(ClientPreparedStatement.java:1372)
at com.mysql.cj.jdbc.ClientPreparedStatement.getCoreParameterIndex(ClientPreparedStatement.java:1385)
at com.mysql.cj.jdbc.ClientPreparedStatement.setString(ClientPreparedStatement.java:1752)
at client_sharenow.Signup.put(Signup.java:29)
at client_sharenow.Client_Request.run(Client_Request.java:40)
at java.base/java.lang.Thread.run(Thread.java:832)
java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).
请帮我更正代码。
?
占位符不能用单引号括起来。
此外,在您的语句中包含将接收每个提供的值的列名称也是一种很好的做法。
如果第一列是自动递增列,那么您应该从列表中省略它,因为它的值将由 MySql 提供:
this.query = "INSERT INTO user_registration(fullname, username, password, email, contact) VALUES (?, ?, ?, ?, ?);";
将列名称更改为实际名称。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.