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Jdbctemplate pass order by dynamic

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#1

Hi, how i do order by dynamic with jdbc template “name column and asc or desc” with values i sent them from postman

Course: The Complete Guide to Spring 5 and Spring Boot 2 - Learn Interactively
Lesson: Custom RowMapper - The Complete Guide to Spring 5 and Spring Boot 2

#2

To dynamically order by a column with values sent from Postman using Spring’s JdbcTemplate, you can construct the SQL query string dynamically based on the user input. Here’s how you can achieve this:

import org.springframework.jdbc.core.JdbcTemplate;

public class YourServiceClass {

    private final JdbcTemplate jdbcTemplate;

    public YourServiceClass(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public List<YourEntity> getOrderedList(String columnName, String order) {
        String sql = "SELECT * FROM your_table ORDER BY " + columnName + " " + order;
        return jdbcTemplate.query(sql, new YourRowMapper());
    }
}

In this example:

  • columnName represents the name of the column by which you want to order the results.
  • order represents the sorting order (ASC or DESC) provided by the user.
  • The SQL query string is dynamically constructed using the provided column name and sorting order.
  • The jdbcTemplate.query() method executes the SQL query and returns the results using a custom RowMapper implementation (YourRowMapper).

Ensure that you properly handle user input to prevent SQL injection attacks. You might also want to validate the columnName and order parameters to ensure they are valid column names and sorting orders.

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