SivaLabs

MyBatis is an SQL Mapper tool which greatly simplifies database programming when compared to using JDBC directly.

MyBatis Tutorial: Part1 – CRUD Operations

MyBatis Tutorial: Part-2: CRUD operations Using Annotations

MyBatis Tutorial: Part 3 – Mapping Relationships

MyBatis Tutorial : Part4 – Spring Integration

Step1: Create a Maven project and configure MyBatis dependencies.

<project xmlns="http://maven.apache.org/POM/4.0.0" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelVersion>4.0.0</modelVersion>

 <groupId>com.sivalabs</groupId>
 <artifactId>mybatis-demo</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>jar</packaging>

 <name>mybatis-demo</name>
 <url>http://maven.apache.org</url>

 <properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 </properties>

 <build>
  <plugins>
   <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>2.3.2</version>
    <configuration>
     <source>1.6</source>
     <target>1.6</target>
     <encoding>${project.build.sourceEncoding}</encoding>
    </configuration>
   </plugin>
  </plugins>
 </build>

 <dependencies>
  <dependency>
   <groupId>junit</groupId>
   <artifactId>junit</artifactId>
   <version>4.10</version>
   <scope>test</scope>
  </dependency>
  <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.1.1</version>
  </dependency>
  <dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
     <version>5.1.21</version>
     <scope>runtime</scope>
  </dependency>
 </dependencies>
</project>

Step#2: Create the table USER and a Java domain Object User as follows:

Before discussing the WatchDog & SpotTheBug Approach, let me give a brief context on the need for this.

Three months back, I was asked to write core infrastructure code for our new application, which uses all the latest and greatest technologies. I have written the infrastructure code and implemented two use cases to demonstrate which logic should go into which layer, and the code looks good (at least to me :-)). Then I moved on to my main project, and I was hearing that the project that I designed (from now onwards, I will refer to this as ProjectA) is going well.

Last week, I had to conduct interviews to hire senior Java developers with around 5 years of experience. But after the interview process was over, I felt like frameworks make developers’ lives easier but, at the same time, make them dumber.

Everyone puts almost all the new frameworks on their resume, claiming they have “Strong, working experience on Spring, Hibernate, Web Services, etc.”.

Here is how the interviews went.

Me: You have used Spring in your latest project. What are the advantages of using Spring? Interviewee: We can configure beans in XML, and it will take care of instantiating and giving them to us.

If you are a Java developer and passionate about technology, you can follow the tips below, which will make you an outstanding Java developer.

1. Have a strong foundation and understanding of OO Principles

For a Java developer, having a strong understanding of Object-Oriented Programming is a must. Without a strong foundation in OOPS, one can’t realize the beauty of an object-oriented programming language like Java. If you don’t have a good idea of what OOPS is, even though you are using an OOP language, you may still be coding in a procedural way. Just studying the definitions of OO principles won’t help much. You should know how to apply those OO principles when designing a solution in an OO way. So, one should have strong knowledge of object modeling, inheritance, polymorphism, and design patterns.