Roy Tutorials

This tutorial will show you how we can configure JSF 2.x, maven and Tomcat 7. For this tutorial we will create maven based web project in Eclipse. If you already have an idea on how to create a maven project in Eclipse will be great otherwise I will tell you here how to create a maven project in Eclipse.

NamedParameterJdbcTemplate and Collections.singletonMap In this post I will show you how to use NamedParameterJdbcTemplate and Collections.singletonMap to execute query for returning result. The NamedParameterJdbcTemplate class adds support for programming JDBC statements using named parameters, as opposed to programming JDBC statements using only classic placeholder (?) arguments. The NamedParameterJdbcTemplate class wraps a JdbcTemplate, and delegates to the wrapped JdbcTemplate to do…

BeanPropertySqlParameterSource In this post I will show you how to use NamedParameterJdbcTemplate and BeanPropertySqlParameterSource to execute query. The NamedParameterJdbcTemplate class adds support for programming JDBC statements using named parameters, as opposed to programming JDBC statements using only classic placeholder (?) arguments. The NamedParameterJdbcTemplate class wraps a JdbcTemplate, and delegates to the wrapped JdbcTemplate to do much of its work. An…

Introduction In this post I will show you how to use NamedParameterJdbcTemplate and MapSqlParameterSource to execute query for inserting or retrieving results from database table. The NamedParameterJdbcTemplate class adds support for programming JDBC statements using named parameters, as opposed to programming JDBC statements using only classic placeholder (?) arguments. An SqlParameterSource is a source of named parameter values to a…

Batch File Creation In this post, I will show you how to create batch file (having an extension as .bat) and execute it using Java. Along with this batch file I am also going to write some content in this batch file so that while executing this batch file I will give some output. Batch file is generally created under…

Auro-generated Id In this post I will show you how to get auto generated id of a newly inserted row in table. Spring provides an easy way to get this auto-generated key using executeAndReturnKey() method of SimpleJdbcInsert which is supported Spring JDBC 3 onwards. For most of the records I will use auto generated Id value on database side to…

Generated Id In this post I will show you how to get auto generated id of a newly inserted row in table. Spring provides an easy way to get this auto-generated key using KeyHolder which is supported Spring JDBC 3 onward. I am going to use PreparedStatement to get the auto generated id value. For most of the records, I…

In this post I will show you how to use Jetty server with Junit test case and how to deploy web application using Java program in Junit test. If you already have an idea on how to create a maven project in Eclipse will be great otherwise I will tell you here how to create a maven project in Eclipse.

In this post, I will show you how to remove duplicate objects from a List using Java’s Comparator interface implementation based on multiple fields in a POJO. You can also check the duplicate objects in a list by overriding hashCode() and equals() methods in the POJO class. In other words, you are going to get the unique objects from the…

In this post, I will show you how to find duplicate objects in a List using Java’s Comparator interface implementation based on multiple fields in a POJO. Prerequisites The following configurations are required in order to run the application Eclipse JDK 1.8 Have maven installed and configured Junit, Mockito, PowerMockito dependency in pom.xml Now we will see the below steps…