Java MySQL prepared statements. Now we will concern ourselves with prepared statements. When we write prepared statements, we use placeholders instead of directly writing the values into the statements. Prepared statements increase security and performance. In Java a PreparedStatement is an object which represents a precompiled SQL statement. Sep 30, 2019 Summary: A Java MySQL INSERT example using PreparedStatement. I hope this Java MySQL INSERT example (using a PreparedStatement) makes sense as is.In 'real world' Java database programs I almost always use Spring to access a database, but when you're first getting started, I think it's important to see examples like this so you can understand how things work under the covers. CREATE TABLE `log` ( `id` int(11) unsigned NOT NULL AUTOINCREMENT, `date` datetime(2) NOT NULL DEFAULT '0000-00-00 00:00:00.00', `username` char(60) NOT NULL, `event` varchar(50) NOT NULL, `message` text NOT NULL, `audiopath` varchar(250) NULL, PRIMARY KEY (`id`) )ENGINE=InnoDB DEFAULT CHARSET=latin1. Page generated in 0.023 sec. Using MySQL 8.0.18-commercial Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.
Write an example for JDBC prepared statement with ResultSet. How to get primary key value (auto-generated keys) from inserted queries using JDBC? Write a simple program for CallableStatement statement to execute stored procedure. Windows 7 ultimate 32bit activation key generator. Write a program for CallableStatement statement with stored procedure returns OUT parameters. Write a program for. Use java.sql.ResultSet java.sql.Statement.getGeneratedKeys to retrieve your generated keys. Pass Statement.RETURNGENERATEDKEYS in prepareStatement along with your query. And then use getGeneratedKeys of PreparedStatement to get the ResultSet containing your inserted autoincrementedid.
The PreparedStatement interface is a subinterface of Statement. It is used to execute parameterized query.
Let's see the example of parameterized query:
As you can see, we are passing parameter (?) for the values. Its value will be set by calling the setter methods of PreparedStatement.
Improves performance: The performance of the application will be faster if you use PreparedStatement interface because query is compiled only once.
The prepareStatement() method of Connection interface is used to return the object of PreparedStatement. Syntax:
The important methods of PreparedStatement interface are given below:
| Method | Description |
|---|---|
| public void setInt(int paramIndex, int value) | sets the integer value to the given parameter index. |
| public void setString(int paramIndex, String value) | sets the String value to the given parameter index. |
| public void setFloat(int paramIndex, float value) | sets the float value to the given parameter index. |
| public void setDouble(int paramIndex, double value) | sets the double value to the given parameter index. |
| public int executeUpdate() | executes the query. It is used for create, drop, insert, update, delete etc. |
| public ResultSet executeQuery() | executes the select query. It returns an instance of ResultSet. |
First of all create table as given below:
Now insert records in this table by the code given below: