{"id":17297,"date":"2024-03-15T14:44:04","date_gmt":"2024-03-15T14:44:04","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-user-login-functionality-be-implemented-using-spring-boot-in-combination-with-jwt\/"},"modified":"2025-08-07T10:09:22","modified_gmt":"2025-08-07T10:09:22","slug":"how-can-user-login-functionality-be-implemented-using-spring-boot-in-combination-with-jwt","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-user-login-functionality-be-implemented-using-spring-boot-in-combination-with-jwt\/","title":{"rendered":"How can user login functionality be implemented using S&#8230;"},"content":{"rendered":"<p>To implement user login functionality using SpringBoot and JWT, you can follow these steps:<\/p>\n<ol>\n<li>The pom.xml file<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">dependency<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">groupId<\/span>&gt;<\/span>org.springframework.boot<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">groupId<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">artifactId<\/span>&gt;<\/span>spring-boot-starter-security<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">artifactId<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">dependency<\/span>&gt;<\/span>\r\n\r\n<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">dependency<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">groupId<\/span>&gt;<\/span>io.jsonwebtoken<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">groupId<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">artifactId<\/span>&gt;<\/span>jjwt<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">artifactId<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">version<\/span>&gt;<\/span>0.9.1<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">version<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">dependency<\/span>&gt;<\/span>\r\n<\/code><\/pre>\n<ol>\n<li>Create user entity: Develop a user object class that includes attributes such as username and password.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">User<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> String username;\r\n    <span class=\"hljs-keyword\">private<\/span> String password;\r\n\r\n    <span class=\"hljs-comment\">\/\/ getter and setter<\/span>\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Service for managing user details<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@Service<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">UserDetailsServiceImpl<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title class_\">UserDetailsService<\/span> {\r\n\r\n    <span class=\"hljs-meta\">@Override<\/span>\r\n    <span class=\"hljs-keyword\">public<\/span> UserDetails <span class=\"hljs-title function_\">loadUserByUsername<\/span><span class=\"hljs-params\">(String username)<\/span> <span class=\"hljs-keyword\">throws<\/span> UsernameNotFoundException {\r\n        <span class=\"hljs-comment\">\/\/ \u4ece\u6570\u636e\u5e93\u6216\u5176\u4ed6\u6570\u636e\u6e90\u52a0\u8f7d\u7528\u6237\u4fe1\u606f<\/span>\r\n        <span class=\"hljs-type\">User<\/span> <span class=\"hljs-variable\">user<\/span> <span class=\"hljs-operator\">=<\/span> userRepository.findByUsername(username);\r\n        <span class=\"hljs-keyword\">if<\/span> (user == <span class=\"hljs-literal\">null<\/span>) {\r\n            <span class=\"hljs-keyword\">throw<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">UsernameNotFoundException<\/span>(<span class=\"hljs-string\">\"User not found\"<\/span>);\r\n        }\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">org<\/span>.springframework.security.core.userdetails.User(user.getUsername(), user.getPassword(), <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ArrayList<\/span>&lt;&gt;());\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Create a login controller: Develop a login controller class to handle user login requests.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@RestController<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">LoginController<\/span> {\r\n\r\n    <span class=\"hljs-meta\">@Autowired<\/span>\r\n    <span class=\"hljs-keyword\">private<\/span> AuthenticationManager authenticationManager;\r\n    <span class=\"hljs-meta\">@Autowired<\/span>\r\n    <span class=\"hljs-keyword\">private<\/span> JwtUtils jwtUtils;\r\n\r\n    <span class=\"hljs-meta\">@PostMapping(\"\/login\")<\/span>\r\n    <span class=\"hljs-keyword\">public<\/span> ResponseEntity&lt;?&gt; login(<span class=\"hljs-meta\">@RequestBody<\/span> User user) {\r\n        <span class=\"hljs-keyword\">try<\/span> {\r\n            authenticationManager.authenticate(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">UsernamePasswordAuthenticationToken<\/span>(user.getUsername(), user.getPassword()));\r\n            <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">token<\/span> <span class=\"hljs-operator\">=<\/span> jwtUtils.generateToken(user.getUsername());\r\n            <span class=\"hljs-keyword\">return<\/span> ResponseEntity.ok(token);\r\n        } <span class=\"hljs-keyword\">catch<\/span> (Exception e) {\r\n            <span class=\"hljs-keyword\">return<\/span> ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Create a JWT utility class: Implement a utility class for creating and parsing JSON Web Tokens.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@Component<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">JwtUtils<\/span> {\r\n\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">secret<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"your-secret-key\"<\/span>;\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">long<\/span> <span class=\"hljs-variable\">expiration<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">86400000<\/span>;\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> String <span class=\"hljs-title function_\">generateToken<\/span><span class=\"hljs-params\">(String username)<\/span> {\r\n        <span class=\"hljs-type\">Date<\/span> <span class=\"hljs-variable\">now<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Date<\/span>();\r\n        <span class=\"hljs-type\">Date<\/span> <span class=\"hljs-variable\">expiryDate<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Date<\/span>(now.getTime() + expiration);\r\n\r\n        <span class=\"hljs-keyword\">return<\/span> Jwts.builder()\r\n                .setSubject(username)\r\n                .setIssuedAt(now)\r\n                .setExpiration(expiryDate)\r\n                .signWith(SignatureAlgorithm.HS512, secret)\r\n                .compact();\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> String <span class=\"hljs-title function_\">getUsernameFromToken<\/span><span class=\"hljs-params\">(String token)<\/span> {\r\n        <span class=\"hljs-keyword\">return<\/span> Jwts.parser()\r\n                .setSigningKey(secret)\r\n                .parseClaimsJws(token)\r\n                .getBody()\r\n                .getSubject();\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-type\">boolean<\/span> <span class=\"hljs-title function_\">isTokenValid<\/span><span class=\"hljs-params\">(String token, UserDetails userDetails)<\/span> {\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">username<\/span> <span class=\"hljs-operator\">=<\/span> getUsernameFromToken(token);\r\n        <span class=\"hljs-keyword\">return<\/span> (username.equals(userDetails.getUsername()) &amp;&amp; !isTokenExpired(token));\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-type\">boolean<\/span> <span class=\"hljs-title function_\">isTokenExpired<\/span><span class=\"hljs-params\">(String token)<\/span> {\r\n        <span class=\"hljs-type\">Date<\/span> <span class=\"hljs-variable\">expirationDate<\/span> <span class=\"hljs-operator\">=<\/span> Jwts.parser()\r\n                .setSigningKey(secret)\r\n                .parseClaimsJws(token)\r\n                .getBody()\r\n                .getExpiration();\r\n        <span class=\"hljs-keyword\">return<\/span> expirationDate.before(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Date<\/span>());\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>properties file for application<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-attr\">spring.security.user.name<\/span>=<span class=\"hljs-string\">admin<\/span>\r\n<span class=\"hljs-attr\">spring.security.user.password<\/span>=<span class=\"hljs-string\">admin<\/span>\r\n<span class=\"hljs-attr\">spring.security.user.roles<\/span>=<span class=\"hljs-string\">USER,ADMIN<\/span>\r\n<\/code><\/pre>\n<ol>\n<li>Set up a JWT filter: Create a JWT filter class to validate the JWT in the request and authenticate the information in the Security context.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@Component<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">JwtTokenFilter<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title class_\">OncePerRequestFilter<\/span> {\r\n\r\n    <span class=\"hljs-meta\">@Autowired<\/span>\r\n    <span class=\"hljs-keyword\">private<\/span> JwtUtils jwtUtils;\r\n    <span class=\"hljs-meta\">@Autowired<\/span>\r\n    <span class=\"hljs-keyword\">private<\/span> UserDetailsServiceImpl userDetailsService;\r\n\r\n    <span class=\"hljs-meta\">@Override<\/span>\r\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">doFilterInternal<\/span><span class=\"hljs-params\">(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)<\/span> <span class=\"hljs-keyword\">throws<\/span> ServletException, IOException {\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">header<\/span> <span class=\"hljs-operator\">=<\/span> request.getHeader(<span class=\"hljs-string\">\"Authorization\"<\/span>);\r\n\r\n        <span class=\"hljs-keyword\">if<\/span> (StringUtils.hasText(header) &amp;&amp; header.startsWith(<span class=\"hljs-string\">\"Bearer \"<\/span>)) {\r\n            <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">token<\/span> <span class=\"hljs-operator\">=<\/span> header.substring(<span class=\"hljs-number\">7<\/span>);\r\n            <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">username<\/span> <span class=\"hljs-operator\">=<\/span> jwtUtils.getUsernameFromToken(token);\r\n\r\n            <span class=\"hljs-keyword\">if<\/span> (StringUtils.hasText(username) &amp;&amp; SecurityContextHolder.getContext().getAuthentication() == <span class=\"hljs-literal\">null<\/span>) {\r\n                <span class=\"hljs-type\">UserDetails<\/span> <span class=\"hljs-variable\">userDetails<\/span> <span class=\"hljs-operator\">=<\/span> userDetailsService.loadUserByUsername(username);\r\n\r\n                <span class=\"hljs-keyword\">if<\/span> (jwtUtils.isTokenValid(token, userDetails)) {\r\n                    <span class=\"hljs-type\">UsernamePasswordAuthenticationToken<\/span> <span class=\"hljs-variable\">authenticationToken<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">UsernamePasswordAuthenticationToken<\/span>(userDetails, <span class=\"hljs-literal\">null<\/span>, userDetails.getAuthorities());\r\n                    authenticationToken.setDetails(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">WebAuthenticationDetailsSource<\/span>().buildDetails(request));\r\n                    SecurityContextHolder.getContext().setAuthentication(authenticationToken);\r\n                }\r\n            }\r\n        }\r\n\r\n        filterChain.doFilter(request, response);\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Set up Spring Security<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>To implement user login functionality using SpringBoot and JWT, you can follow these steps: The pom.xml file &lt;dependency&gt; &lt;groupId&gt;org.springframework.boot&lt;\/groupId&gt; &lt;artifactId&gt;spring-boot-starter-security&lt;\/artifactId&gt; &lt;\/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;io.jsonwebtoken&lt;\/groupId&gt; &lt;artifactId&gt;jjwt&lt;\/artifactId&gt; &lt;version&gt;0.9.1&lt;\/version&gt; &lt;\/dependency&gt; Create user entity: Develop a user object class that includes attributes such as username and password. public class User { private String username; private String password; \/\/ getter and [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[453,1402,299,1404,1403],"class_list":["post-17297","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-development","tag-guide","tag-programming","tag-technology","tag-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How can user login functionality be implemented using S... 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