What is JdbcTemplate?
JdbcTemplate class is the central class in the JDBC core package. It simplifies the use of JDBC and helps to avoid common errors. It executes core JDBC workflow, leaving the application code to provide SQL and extract results.
How do I find database metadata?
How to get the object of DatabaseMetaData: The getMetaData() method of Connection interface returns the object of DatabaseMetaData. Syntax: public DatabaseMetaData getMetaData()throws SQLException.
How do you mock JdbcTemplate?
In this unit test, we first declare a mock JdbcTemplate object with the @Mock annotation. Then we inject it to the EmployeeDAO object using ReflectionTestUtils. Also, we use the Mockito utility to mock the return result of the JdbcTemplate query.
Is JdbcTemplate thread safe?
Once configured, a JdbcTemplate instance is threadsafe. You may want multiple JdbcTemplate instances if your application accesses multiple databases, which requires multiple DataSources , and subsequently multiple differently configured JdbcTemplates .
What is the use of JdbcTemplate in Spring boot?
Spring JdbcTemplate is a powerful mechanism to connect to the database and execute SQL queries. It internally uses JDBC api, but eliminates a lot of problems of JDBC API.
What is SQL metadata?
Metadata, as most of you may already know, provides the basic and relevant information about the data. Metadata functions in SQL Server return information about the database, database objects, database files, file groups etc. in SQL Server.
Is JdbcTemplate deprecated?
JdbcTemplate “queryForObject” and “query” is deprecated in Spring.
What is @SpringBootTest?
Spring Boot provides a @SpringBootTest annotation, which can be used as an alternative to the standard spring-test @ContextConfiguration annotation when you need Spring Boot features. The annotation works by creating the ApplicationContext used in your tests through SpringApplication .
How to map resultsetmetadata from jdbctemplate to an object in spring?
This is in response to a programming problem where extracting ResultSetMetaData from Spring JdbcTemplate was the requirement. Spring provides a wrapper over ResultSet and gives us the options to map the returned RestultSet with an object of our choice. This is easily achieved by using RowMapper interface.
What is getmetadata () method in JDBC database?
Therefore, getMetaData () method returns an object of JdbcDatabaseMetaData, which implements the DatabaseMetaData interface. In the next few sections, we’ll use this object to fetch different types of metadata. Afterward, we’ll also learn how to check if the database supports a particular feature.
How to get databasemetadata from connection object in Java?
So, let’s see in code how we can obtain this from a Connection object: Here, the connection is an instance of JdbcConnection. Therefore, getMetaData () method returns an object of JdbcDatabaseMetaData, which implements the DatabaseMetaData interface.
How to read resultsetmetadata in Java?
ResultSetMetaData is an interface, which is coming from java.sql package. If we want to read the data from database we need to use executeQuery () method. Obviously executeQuery () method returns ResultSet object, which consists the data rows.