[FIXED] No Mapping for GET /WEB-INF/jsp/login.jsp

Issue

Please find this project on GITHUB as studentsbooks

I am getting errror as below, even after following a proper tutorial. Kindly guide where i am going wrong. Feel free to clone the project. Committed Just now.

2021-04-23 20:45:38.227  INFO 16580 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : 

Initializing Spring DispatcherServlet 'dispatcherServlet'
2021-04-23 20:45:38.227  INFO 16580 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2021-04-23 20:45:38.229  INFO 16580 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 2 ms
2021-04-23 20:45:38.259  WARN 16580 --- [nio-8080-exec-1] o.s.web.servlet.PageNotFound             : No mapping for GET /WEB-INF/jsp/login.jsp

Solution

I created a class InsertInitialData class annotated as @Component and used WebApplicationContext with autowired annotation. Thymeleaf uses context to get initialized please find in below code.

@Component
public class InsertInitialData{

WebApplicationContext context;

@Autowired
public void setContext(WebApplicationContext context) {
    this.context = context;
}
@Bean //as it is from thymeleaf documentation, just passed the context! else is same!
public SpringResourceTemplateResolver templateResolver(){
    // SpringResourceTemplateResolver automatically integrates with Spring's own
    // resource resolution infrastructure, which is highly recommended.
    SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
    templateResolver.setApplicationContext(this.context);
    templateResolver.setPrefix("/WEB-INF/templates/");
    templateResolver.setSuffix(".html");
    // HTML is the default value, added here for the sake of clarity.
    templateResolver.setTemplateMode(TemplateMode.HTML);
    // Template cache is true by default. Set to false if you want
    // templates to be automatically updated when modified.
    templateResolver.setCacheable(true);
    return templateResolver;
}

@Bean
public SpringTemplateEngine templateEngine(){
    // SpringTemplateEngine automatically applies SpringStandardDialect and
    // enables Spring's own MessageSource message resolution mechanisms.
    SpringTemplateEngine templateEngine = new SpringTemplateEngine();
    templateEngine.setTemplateResolver(templateResolver());
    // Enabling the SpringEL compiler with Spring 4.2.4 or newer can
    // speed up execution in most scenarios, but might be incompatible
    // with specific cases when expressions in one template are reused
    // across different data types, so this flag is "false" by default
    // for safer backwards compatibility.
    templateEngine.setEnableSpringELCompiler(true);
    return templateEngine;
}

Take a look at the repo, clone and run, using Spring boot run

Answered By - Abhijeet
Answer Checked By - David Goodson (JavaFixing Volunteer)