spring-jdbc

As per my understanding the use of PreparedStatement in Java is we can use it multiple times. But I have some confusion using PreparedStatementCreator of Spring JDBC. For example consider following code, public class SpringTest { JdbcTemplate jdbcTemplate; PreparedStatementCreator preparedStatementCreator; ResultSetExtractor<String> resultSetExtractor; public SpringTest() throws SQLException { jdbcTemplate = new JdbcTemplate(OracleUtil.getDataSource()); preparedStatementCreator = new PreparedStatementCreator() { String query = "select NAME from TABLE1 where ID=?"; public PreparedStatement

i am currently trying to build a little webapp that uses Spring, Hibernate and Maven (running on a tomcat). It works quite fine, except that i cannot get my embedded-database to work. I hope you can help me. I am always facing this error, when i am deploying the webapp to the Tomcat: The matching wildcard is strict, but no declaration can be found for element 'jdbc:embedded-database' During my investigations i learned that this message is pointing towards missing libraries. Therefore i added my pom.xml, where i added the artifact spring-jdbc. Can you help me finding the error? Thanks a lot!

I am using spring-boot in my web application and use spring-jpa to read/write from/to my database. It works very well but I want to understand how to manage the database connections. Below is my properties configuration for database: spring.datasource.url=jdbc:mysql://localhost:3306/test?characterEncoding=utf8 spring.datasource.username=user spring.datasource.password=pwd spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.max-active=500 I have set the maximum connections to 500. When a user makes a request on my spring application, a database connection will be opened

I am running Spring Boot connecting to a PostgreSQL database. I have verified that data is written to the database if Spring Boot is started after the database. spring.datasource.url = jdbc:postgresql://localhost/dbname spring.datasource.username = user spring.datasource.password = secret spring.datasource.driver-class-name = org.postgresql.Driver spring.datasource.testOnBorrow=true spring.datasource.validationQuery=SELECT 1 When there are changes in the database in development, I run into exceptions: PreparedStatementCallback; SQL []; This connection has been closed.; nested exception is org

I am studying how to execute query on a database using JDBC in Spring Framework. I am following this tutorial: http://www.tutorialspoint.com/spring/spring_jdbc_example.htm In this tutorial I define a StudentDAO interface which only define the CRUD method that I want. Then is defined the Student class that is the entity that I want to persist on the Student database table. Then is defined the StudentMapper class that is a specific implementation of RowMapper interface that, in this case, is used to map a specific record in the ResultSet (returned by a query) to a Student object. Then I have the

I am currently learning more about implementing JDBC and using databases in a Spring Boot webapp, and I encountered the following Stack Trace written in the bottom of the post. I have created a simple Employee model, and I am trying to execute some database code on the same class which my main() lies in. The model and the main class are the only two java files existing in this whole project. I am trying to implement the following run() code that overrides the one from the interface, CommandLineRunner, but I do not get the logs that should come after log.info("Part A:") : log.info("Part A:")

I wanted to do commit and rollback using jdbcTemplate. My question is based on this thread How do I commit or rollback, should I do it on jdbcTemplate like jdbcTemplate.commit(); jdbcTemplate.rollback(); Or there are some other ways to achieve commit and rollback functionality using jdbcTemplate. To call commit or rollback at will set the transactional boundaries programmatically and not declaratively. For that reason you have to get hold of the PlatformTransactionManager - inject it that is in your DAO and perform the commit / rollback operation yourself. Sample code: @Autowired private

For a new project is JPA always the recommended tool for handling relational data or are there scenarios where Spring JdbcTemplate is a better choice? Some factors to consider in your response: new database schema vs pre-existing schema and tables level of developer expertise ease with which can integrate with a data caching layer performance any other relevant factors to consider? Use Spring JdbcTemplate if you don't want to access your database schema via a domain model. Using JdbcTemplate you are using a lower level access, with more flexibility, but probably also more boilerplate. Spring