first

.gitignore

+/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/

pom.xml

+<?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.javainuse</groupId>
+    <artifactId>boot-session</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <name>Spring-Boot-Session-Example</name>
+    <description>Spring-Boot-Session-Example</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.0.3.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>8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.session</groupId>
+            <artifactId>spring-session-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.session</groupId>
+            <artifactId>spring-session-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+
+</project>
\ No newline at end of file

src/main/java/com/javainuse/SpringBootSessionApplication.java

+package com.javainuse;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringBootSessionApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootSessionApplication.class, args );
+    }
+}
\ No newline at end of file

src/main/java/com/javainuse/controller/SpringSessionController.java

+package com.javainuse.controller;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpSession;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+@Controller
+public class SpringSessionController {
+
+    @GetMapping("/")
+    public String process(Model model, HttpSession session) {
+        @SuppressWarnings("unchecked")
+        List<String> messages = (List<String>) session.getAttribute("MY_SESSION_MESSAGES");
+
+        if (messages == null) {
+            messages = new ArrayList<>();
+        }
+        model.addAttribute("sessionMessages", messages);
+
+        return "index";
+    }
+
+    @PostMapping("/persistMessage")
+    public String persistMessage(@RequestParam("msg") String msg, HttpServletRequest request) {
+        @SuppressWarnings("unchecked")
+        List<String> messages = (List<String>) request.getSession().getAttribute("MY_SESSION_MESSAGES");
+        if (messages == null) {
+            messages = new ArrayList<>();
+            request.getSession().setAttribute("MY_SESSION_MESSAGES", messages);
+        }
+        messages.add(msg);
+        request.getSession().setAttribute("MY_SESSION_MESSAGES", messages);
+        return "redirect:/";
+    }
+
+    @PostMapping("/destroy")
+    public String destroySession(HttpServletRequest request) {
+        request.getSession().invalidate();
+        return "redirect:/";
+    }
+}
\ No newline at end of file

src/main/resources/application.properties

+spring.datasource.driver-class-name=com.mysql.jdbc.Driver
+spring.datasource.url=jdbc:mysql://localhost/springSession?createDatabaseIfNotExist=true&autoReconnect=true&useSSL=false
+spring.datasource.username=root
+#spring.datasource.password=root
+spring.datasource.initialization-mode=always
+
+spring.h2.console.enabled=true
+
+spring.session.store-type=jdbc
+spring.session.jdbc.initialize-schema=always
+spring.session.timeout.seconds=900
\ No newline at end of file

src/main/resources/templates/index.html

+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+    <meta charset="UTF-8">
+    <title>Spring Boot Session Example</title>
+</head>
+<body>
+<div>
+    <form th:action="@{/persistMessage}" method="post">
+        <textarea name="msg" cols="40" rows="2"></textarea>
+        <br> <input type="submit" value="Save Message" />
+    </form>
+</div>
+<div>
+    <h2>Messages</h2>
+    <ul th:each="message : ${sessionMessages}">
+        <li th:text="${message}">msg</li>
+    </ul>
+</div>
+<div>
+    <form th:action="@{/destroy}" method="post">
+        <input type="submit" value="Destroy Session" />
+    </form>
+</div>
+</body>
+</html>
\ No newline at end of file