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workings example for Spring session attributes (@SessionAttribute and @SessionAttributes)

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This commit is contained in:
Umesh Awasthi
2018-08-18 11:15:55 -07:00
parent 750faaff21
commit 2fc4b59b22
10 changed files with 270 additions and 0 deletions
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25
Spring-Boot/spring-session-attribute/.gitignore vendored Normal file
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/target/
!.mvn/wrapper/maven-wrapper.jar
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
### NetBeans ###
/nbproject/private/
/build/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/

59
Spring-Boot/spring-session-attribute/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<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.javadevjournal</groupId>
<artifactId>spring-session-attribute</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-session-attribute</name>
<description>Spring Session Attribute sample application</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

12
Spring-Boot/spring-session-attribute/src/main/java/com/javadevjournal/SpringSessionAttributeApplication.java Normal file
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package com.javadevjournal;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringSessionAttributeApplication {
public static void main(String[] args) {
SpringApplication.run(SpringSessionAttributeApplication.class, args);
}
}

47
Spring-Boot/spring-session-attribute/src/main/java/com/javadevjournal/controller/AddToCartController.java Normal file
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package com.javadevjournal.controller;
import com.javadevjournal.model.ShoppingCart;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.SessionAttributes;
@Controller
@SessionAttributes("shoppingCart")
public class AddToCartController {
@PostMapping("/addToCart")
public String addToCart(final Model model, @ModelAttribute ShoppingCart shoppingCart,final String productCode){
if(shoppingCart!=null){
//add product to the shopping cart list
shoppingCart.setProduct(productCode);
model.addAttribute("cart",shoppingCart);
}
else{
ShoppingCart cart = new ShoppingCart();
cart.setCustomerName("Super customer");
cart.setProduct(productCode);
model.addAttribute("cart",cart);
}
return "redirect:"+"product-detail-page";
}
@GetMapping("/product-detail-page")
public String viewPDP(Model model,@ModelAttribute("shoppingCart") ShoppingCart shoppingCart){
if(shoppingCart !=null){
model.addAttribute("cart",shoppingCart);
}
else{
model.addAttribute("cart",new ShoppingCart());
}
return "product";
}
@ModelAttribute("shoppingCart")
public ShoppingCart shoppingCart() {
return new ShoppingCart();
}
}

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Spring-Boot/spring-session-attribute/src/main/java/com/javadevjournal/controller/CartPageController.java Normal file
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package com.javadevjournal.controller;
import com.javadevjournal.model.ShoppingCart;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.SessionAttribute;
import org.springframework.web.bind.annotation.SessionAttributes;
@Controller
public class CartPageController {
@GetMapping("/cart")
public String cart(@SessionAttribute("shoppingCart") ShoppingCart cart, final Model model){
model.addAttribute("cart", cart);
return "cart";
}
}

57
Spring-Boot/spring-session-attribute/src/main/java/com/javadevjournal/model/ShoppingCart.java Normal file
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package com.javadevjournal.model;
import org.springframework.util.CollectionUtils;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
public class ShoppingCart {
private String customerName;
private List<String> products;
private String product;
public String getCustomerName() {
return customerName;
}
public void setCustomerName(String customerName) {
this.customerName = customerName;
}
public List<String> getProducts() {
return products;
}
public void setProducts(List<String> products) {
this.products = products;
}
public void setProduct(String product) {
if(CollectionUtils.isEmpty(this.getProducts())){
List<String> products = new ArrayList<>();
products.add(product);
this.setProducts(products);
}
else {
this.getProducts().add(product);
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof ShoppingCart)) return false;
ShoppingCart that = (ShoppingCart) o;
return Objects.equals(getCustomerName(), that.getCustomerName()) &&
Objects.equals(getProducts(), that.getProducts());
}
@Override
public int hashCode() {
return Objects.hash(getCustomerName(), getProducts());
}
}

0
Spring-Boot/spring-session-attribute/src/main/resources/application.properties Normal file
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Spring-Boot/spring-session-attribute/src/main/resources/templates/cart.html Normal file
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<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Shopping Cart Page</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<h1>Product Detail</h1>
<h1>Product list</h1>
<table>
<tr>
<th>Product Code Code</th>
</tr>
<tr th:each="prod : ${cart.products}">
<td th:text="${prod}">Onions</td>
</tr>
</table>
</body>
</html>

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Spring-Boot/spring-session-attribute/src/main/resources/templates/product.html Normal file
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<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Product detail Page</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<h1>Product Detail</h1>
<form action="#" th:action="@{/addToCart}" method="post">
<p>Product Code: <input type="text" name="productCode"/></p>
<p>Description: This is really an awesome page </p>
<p><input type="submit" value="Add To Cart" />
<a href="/cart" name="Cart Page">Go To cart Page</a>
</form>
</body>
</html>

16
Spring-Boot/spring-session-attribute/src/test/java/com/javadevjournal/SpringSessionAttributeApplicationTests.java Normal file
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package com.javadevjournal;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringSessionAttributeApplicationTests {
@Test
public void contextLoads() {
}
}