jwt generation and validation working

Author: amitpanwar789

spring-boot-jwt/pom.xml

@@ -27,13 +27,9 @@
 		<url/>
 	</scm>
 	<properties>
-		<java.version>22</java.version>
+		<java.version>17</java.version>
 	</properties>
 	<dependencies>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-security</artifactId>
-		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
@@ -48,7 +44,12 @@
         <groupId>io.jsonwebtoken</groupId>
         <artifactId>jjwt</artifactId>
         <version>0.9.1</version>
-    </dependency>
+    	</dependency>
+		<dependency>
+		<groupId>javax.xml.bind</groupId>
+		<artifactId>jaxb-api</artifactId>
+		<version>2.3.1</version>
+		</dependency>
 	</dependencies>
 
 	<build>

spring-boot-jwt/src/main/java/com/akash/springboot/jwt/JwtUtil.java

@@ -3,17 +3,20 @@
 import io.jsonwebtoken.Jwts;
 import io.jsonwebtoken.SignatureAlgorithm;
 import io.jsonwebtoken.SignatureException;
+
 import org.springframework.stereotype.Component;
 
+import java.io.UnsupportedEncodingException;
 import java.util.Date;
 
 @Component
 public class JwtUtil {
 
-    private static final String SECRET_KEY = "your_secret_key";
+    private static final String SECRET_KEY = "secret_key";
 
-    public String generateToken(String username) {
+    public String generateToken(String username) throws UnsupportedEncodingException {
         return Jwts.builder()
+                .setIssuer("spring-boot-jwt")
                 .setSubject(username)
                 .setIssuedAt(new Date())
                 .setExpiration(new Date(System.currentTimeMillis() + 86400000)) // 1 day expiration

spring-boot-jwt/src/main/java/com/akash/springboot/jwt/UserController.java

@@ -5,6 +5,7 @@
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
+import java.io.UnsupportedEncodingException;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -17,19 +18,27 @@ public class UserController {
     @Autowired
     private JwtUtil jwtUtil;
 
+    @GetMapping("/")
+	public String index() {
+		return "Greetings from Spring Boot!";
+	}
+
     @PostMapping("/login")
     public ResponseEntity<?> login(@RequestBody Map<String, String> user) {
         String username = user.get("username");
         String password = user.get("password");
         users.put(username, password);
 
-        // TODO: Generate JWT token
-        String token = jwtUtil.generateToken(username);
+        try {
+           String token = jwtUtil.generateToken(username);            Map<String, String> response = new HashMap<>();
+            response.put("token", token);
+            System.err.println(token);
+            return new ResponseEntity<>(response, HttpStatus.OK);
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+        }
 
-        Map<String, String> response = new HashMap<>();
-        response.put("token", token);
-        System.err.println(token);
-        return new ResponseEntity<>(response, HttpStatus.OK);
+        return new ResponseEntity<>("Invalid user", HttpStatus.UNAUTHORIZED);
     }
 
 

spring-boot-jwt/src/main/java/com/akash/springboot/jwt/tempCodeRunnerFile.java

@@ -0,0 +1 @@
+package com.akash.springboot.jwt;

spring-boot-jwt/src/main/resources/application.properties

@@ -1 +1,2 @@
+server. Port=8080
 spring.application.name=springboot.jwt