Spring-dependency injection
This commit is contained in:
Senthil Kumar Subramanian
parent
8755eb18f7
commit
0dab47c76d
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.spring.core</groupId>
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<artifactId>Spring-DependencyInjection</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<packaging>jar</packaging>
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<name>Spring-DependencyInjection</name>
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<url>http://maven.apache.org</url>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-context</artifactId>
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<version>4.3.14.RELEASE</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>3.8.1</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>
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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns="http://www.springframework.org/schema/beans"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
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xsi:schemaLocation="
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http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
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http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
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<context:annotation-config />
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<context:component-scan base-package="com.baeldung.spring.core" />
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<bean id="department" class="com.baeldung.spring.core.Department">
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<constructor-arg name="departmentName" value="Sales" type="String" />
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<constructor-arg name="departmentNumber" value="S01" type="String" />
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</bean>
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<bean id="employee" class="com.baeldung.spring.core.Employee">
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<constructor-arg name="department" ref="department" />
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</bean>
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<bean id="subject" class="com.baeldung.spring.core.Subject">
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<property name="subjectName" value="Maths" />
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<property name="subjectId" value="M1" />
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</bean>
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<bean id="student" class="com.baeldung.spring.core.Student">
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<property name="studentName" value="student1" />
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<property name="studentId" value="123" />
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<property name="subject" ref="subject" />
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</bean>
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</beans>
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package com.baeldung.spring.core;
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import org.springframework.stereotype.Component;
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@Component
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public class Address {
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private String address1;
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private String city;
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private String state;
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private String country;
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public String getAddress1() {
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return address1;
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}
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public void setAddress1(String address1) {
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this.address1 = address1;
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}
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public String getCity() {
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return city;
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}
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public void setCity(String city) {
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this.city = city;
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}
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public String getState() {
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return state;
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}
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public void setState(String state) {
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this.state = state;
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}
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public String getCountry() {
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return country;
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}
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public void setCountry(String country) {
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this.country = country;
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}
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@Override
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public String toString() {
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return "Address [address1=" + address1 + ", city=" + city + ", state=" + state + ", country=" + country + "]";
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}
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}
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package com.baeldung.spring.core;
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public class Car {
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private String carName;
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private String carType;
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public String getCarName() {
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return carName;
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}
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public void setCarName(String carName) {
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this.carName = carName;
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}
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public String getCarType() {
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return carType;
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}
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public void setCarType(String carType) {
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this.carType = carType;
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}
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@Override
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public String toString() {
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return "Car [carName=" + carName + ", carType=" + carType + "]";
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}
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}
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package com.baeldung.spring.core;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Component;
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@Component
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public class Customer {
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@Value("Thomas")
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private String customerName;
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@Value("Cust123")
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private String customerId;
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private Product product;
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private Address address;
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@Autowired
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public Customer(Address address) {
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super();
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this.address = address;
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}
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public String getCustomerName() {
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return customerName;
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}
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public void setCustomerName(String customerName) {
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this.customerName = customerName;
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}
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public String getCustomerId() {
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return customerId;
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}
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public void setCustomerId(String customerId) {
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this.customerId = customerId;
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}
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public Product getProduct() {
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return product;
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}
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@Autowired
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public void setProduct(Product product) {
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this.product = product;
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}
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public Address getAddress() {
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return address;
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}
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@Override
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public String toString() {
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return "Customer [customerName=" + customerName + ", customerId=" + customerId + ", product=" + product
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+ ", address=" + address + "]";
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}
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}
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package com.baeldung.spring.core;
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import org.springframework.stereotype.Component;
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@Component
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public class Department {
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private String departmentName;
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private String departmentId;
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public Department(String departmentName, String departmentNumber) {
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super();
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this.departmentName = departmentName;
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this.departmentId = departmentNumber;
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}
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public String getDepartmentName() {
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return departmentName;
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}
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public String getDepartmentId() {
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return departmentId;
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}
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@Override
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public String toString() {
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return "Department [departmentName=" + departmentName + ", departmentNumber=" + departmentId + "]";
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}
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}
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package com.baeldung.spring.core;
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import org.springframework.stereotype.Component;
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@Component
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public class Employee {
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private Department department;
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public Employee(Department department) {
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super();
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this.department = department;
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}
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public Department getDepartment() {
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return department;
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}
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@Override
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public String toString() {
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return "Employee [department=" + department + "]";
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}
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}
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package com.baeldung.spring.core;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Component;
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@Component
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public class Product {
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@Value("product1")
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private String productName;
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@Value("Pro123")
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private String productId;
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@Value("100")
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private String productCost;
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public String getProductName() {
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return productName;
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}
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public void setProductName(String productName) {
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this.productName = productName;
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}
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public String getProductId() {
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return productId;
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}
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public void setProductId(String productId) {
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this.productId = productId;
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}
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public String getProductCost() {
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return productCost;
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}
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public void setProductCost(String productCost) {
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this.productCost = productCost;
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}
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@Override
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public String toString() {
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return "Product [productName=" + productName + ", productId=" + productId + ", productCost=" + productCost
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+ "]";
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}
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}
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package com.baeldung.spring.core;
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public class Student {
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private String studentName;
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private String studentId;
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private Subject subject;
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public String getStudentName() {
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return studentName;
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}
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public void setStudentName(String studentName) {
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this.studentName = studentName;
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}
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public String getStudentId() {
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return studentId;
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}
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public void setStudentId(String studentId) {
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this.studentId = studentId;
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}
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public Subject getSubject() {
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return subject;
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}
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public void setSubject(Subject subject) {
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this.subject = subject;
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}
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@Override
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public String toString() {
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return "Student [studentName=" + studentName + ", studentId=" + studentId + ", subject=" + subject + "]";
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}
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}
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package com.baeldung.spring.core;
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public class Subject {
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private String subjectName;
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private String subjectId;
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public String getSubjectName() {
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return subjectName;
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}
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public void setSubjectName(String subjectName) {
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this.subjectName = subjectName;
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}
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public String getSubjectId() {
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return subjectId;
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}
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public void setSubjectId(String subjectId) {
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this.subjectId = subjectId;
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}
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@Override
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public String toString() {
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return "Subject [subjectName=" + subjectName + ", subjectId=" + subjectId + "]";
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}
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}
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package com.baeldung.spring.core.config;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import com.baeldung.spring.core.Car;
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import com.baeldung.spring.core.Department;
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import com.baeldung.spring.core.Employee;
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@Configuration
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public class AppConfig {
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@Bean
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public Department getDepartment() {
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return new Department("Sales", "S01");
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}
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@Bean
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public Employee getEmployee() {
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return new Employee(getDepartment());
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}
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@Bean
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public Car getCar() {
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Car car = new Car();
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car.setCarName("Honda");
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car.setCarType("SUV");
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return car;
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}
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}
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package com.baeldung.spring.core.test;
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import org.springframework.context.support.AbstractApplicationContext;
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import org.springframework.context.support.ClassPathXmlApplicationContext;
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import com.baeldung.spring.core.Customer;
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public class AnnotationApplicationContextTest {
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public static void main(String[] args) {
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AbstractApplicationContext applicationContext = new ClassPathXmlApplicationContext("beans.xml");
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Customer customer = applicationContext.getBean(Customer.class);
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System.out.println("Customer is :: " + customer);
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System.out.println("Product is :: " + customer.getProduct());
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applicationContext.close();
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}
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}
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package com.baeldung.spring.core.test;
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import org.springframework.context.annotation.AnnotationConfigApplicationContext;
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import org.springframework.context.support.AbstractApplicationContext;
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import com.baeldung.spring.core.Car;
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import com.baeldung.spring.core.Department;
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import com.baeldung.spring.core.Employee;
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import com.baeldung.spring.core.config.AppConfig;
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public class JavaConfigApplicationContextTest {
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public static void main(String[] args) {
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AbstractApplicationContext applicationContext = new AnnotationConfigApplicationContext(AppConfig.class);
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Department department = applicationContext.getBean(Department.class);
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Employee employee = applicationContext.getBean(Employee.class);
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System.out.println("Department is :: " + department);
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System.out.println("Employee is :: " + employee);
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Car car = applicationContext.getBean(Car.class);
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System.out.println("Car is :: " + car);
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applicationContext.close();
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}
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}
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package com.baeldung.spring.core.test;
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import org.springframework.context.support.AbstractApplicationContext;
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import org.springframework.context.support.ClassPathXmlApplicationContext;
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import com.baeldung.spring.core.Department;
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import com.baeldung.spring.core.Employee;
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import com.baeldung.spring.core.Student;
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import com.baeldung.spring.core.Subject;
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public class XMLConfigurationApplicationContextTest {
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public static void main(String[] args) {
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AbstractApplicationContext abstractApplicationContext = new ClassPathXmlApplicationContext("beans.xml");
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// Constructor Injection
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Department department = (Department) abstractApplicationContext.getBean("department");
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Employee employee = (Employee) abstractApplicationContext.getBean("employee");
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System.out.println("Department is :: " + department);
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System.out.println("Employee is :: " + employee);
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// Setter Injection
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Subject subject = (Subject) abstractApplicationContext.getBean("subject");
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Student student = (Student) abstractApplicationContext.getBean("student");
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System.out.println("Subject is :: " + subject);
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System.out.println("Student is :: " + student);
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abstractApplicationContext.close();
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}
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}
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@ -0,0 +1,38 @@
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package com.spring.core.Spring_DependencyInjection;
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import junit.framework.Test;
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import junit.framework.TestCase;
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import junit.framework.TestSuite;
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/**
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* Unit test for simple App.
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*/
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public class AppTest
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extends TestCase
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{
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/**
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* Create the test case
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*
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* @param testName name of the test case
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*/
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public AppTest( String testName )
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{
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super( testName );
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}
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/**
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* @return the suite of tests being tested
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*/
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public static Test suite()
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{
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return new TestSuite( AppTest.class );
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}
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/**
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* Rigourous Test :-)
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*/
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public void testApp()
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{
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assertTrue( true );
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}
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}
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