SetObject() method, error Parameter index out of range and com. The MySQL. JDBC. Exceptions. Jdbc4. MySQLSyntaxErrorException error

Learn how to use the setObject() method in PreparedStatement for placeholders in SQL procedures. , appear when to replace the Parameter index out of range error:

1, the number of placeholders, and transfer the Object [] array element number
2, different placeholders used in Chinese?Rather than?

If the above situation is modified, the com. Mysql. JDBC. Exceptions. Jdbc4. MySQLSyntaxErrorException error
see first in the use of setObject () method before and after the difference between a PreparedStatement object:

Object[] objects = new Object[]{"name","age","xixi","23"};
sql = "insert into student (?,?) values(?,?);";
//Get the execution object (connection as Connection object)
preparedStatement = connection.preparedStatement(sql);
System.out.println(preparedStatement.toString());
// determine if the parameter exists, and replace it
if (obs!=null&&obs.length>0){
	for (int i = 0; i < obs.length; i++) {
		preparedStatement.setObject(i+1,obs[i]);
	}
}
System.out.println(preparedStatement.toString());

Perform before:
com. Mysql. JDBC. JDBC42PreparedStatement @ 443 b7951:
insert into student (* * NOT SPECIFIED, the NOT SPECIFIED) values (NOT SPECIFIED, the NOT SPECIFIED * *);

com after execution. Mysql. JDBC. JDBC42PreparedStatement @ 443 b7951:
insert into student (” name “, “age”) values (‘ hee hee ‘, ’23’);
All ** Not SPECIFIED ** placeholders are replaced by elements in the Objects[] array with single quotes.
in the mysql database, the parameters need to add single quotation marks, it is enclosed within a string value. Column names, table names, and so on use backquotes to distinguish them from special keywords (the symbol to the left of the 1 digit).
So if you want to replace non-attribute values, you should choose other methods such as concatenation SQL statements to prevent errors.