true

Find the best tutors and institutes for Java Training

Find Best Java Training Classes

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Outside India?

Search for topics

Spring - Dependency Injection (DI)

Gaurav Kothari
01 Sep 0 0

Spring - Dependency Injection (DI)

DI is a framework which provides loose coupling in code. Here loose coupling means no hard coding of the object. Instead of hard coding, we will be injecting these object from some configurations (XML based, java based, annotation-based).

DI is nothing but design patterns which give you the lightweight loosely couple enterprise application in the result.

What is an injection? -- Inserting of an object/ value into a class whenever the help requires it of third party configurations.

There is two way of achieving Dependency Injection:

  • By Constructor
  • By Setter method

Constructor Injection: Injecting any object/ value through the constructor of a class. For, e.g., I have a Test class with the parameterized constructor in it, and I am initializing parameter of that constructor from the external source, i.e. XML file. See how

public class Test { 

private int id; 

public Employee(int id) {

this.id = id;

}

XML configuration file: //here now 100 will be assigned to the id of Test class

 

 

 

 

Setter method Injection: Injecting any object/ value through the setter method of a class. For, e.g., I have a Test class with setter method in it, and I am initializing parameter of that setter method from the external source, i.e. XML file. See how

public class Test { 

private int id; 

public int getId() { 

    return id; 

public void setId(int id) { 

    this.id = id; 

}

}

XML configuration file: //here now 100 will be assigned to the id of Test class

 

 

100 

 

Please add on comments and like this lesson, if it gave you some revision or refreshment on Spring - Dependency Injection (DI) concepts.

0 Dislike
Follow 2

Please Enter a comment

Submit

Other Lessons for You

Product Owner in Agile
- Define the overall UX strategy and vision for the user experiences across all of the external and internal platform, aligning with the Senior Leadership Team.- Working closely with the business team...

Dannie Joe A | 11 Sep

0 0
0

Write your first Python program in 10 minutes
1. Download python from python official site search "python download" in google 2. Install in your machine 3. verify using : "python --version" command 4. Write first program using notepad create...

Debrati Sadhu | 04 Aug

1 0
0

Facts about C language
C programming language was developed in 1972 by Dennis Ritchie at AT&T Bell Labs. It was developed to overcome the problems of languages such as B, BPCL. It was developed to write the Unix operating...

Manoj Singh | 03 Aug

0 0
0

C program for Beginners
A Program to print 2 integer value. #include<stdio.h> #include<conio.h> main() int a,b,add; a=5; b=3; add=a+b; printf(“ Addition=%d”,&add); getch(); Brief description...
P

Parul R. | 02 Aug

0 0
0

Overloading in JAVA
When a class contains more than one method with the same method name but different argument types, then it is called Overloading. Methods are said to be Overloaded methods. Also, know as Compile time...

Swati S. | 19 May

0 0
0
X

Looking for Java Training Classes?

Find best tutors for Java Training Classes by posting a requirement.

  • Post a learning requirement
  • Get customized responses
  • Compare and select the best

Looking for Java Training Classes?

Find best Java Training Classes in your locality on UrbanPro

Post your learning requirement

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 25 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 6.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more