Dynamische Seiten können nicht mit Spring Stiefel rendern ⇐ Java

[Guest]

Ich habe schon seit einiger Zeit versucht, dynamische Seiten in meiner Spring -Boot -Anwendung zu rendern, aber ich kann nicht scheinbar Fortschritte machen. Ich habe fast alles ausprobiert, was ich im Internet von YouTube bis AI gesehen habe, und dies ist mein letzter Ausweg. Zeigt stattdessen eine Zeichenfolge an. < /p>
So sieht mein Controller aus: < /p>
package com.demo.student1.api;
import com.demo.student1.model.Student;
import com.demo.student1.service.StudentService;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.Optional;

@RequestMapping("/student")
@RestController
public class StudentController {

private final StudentService studentService;
public StudentController(StudentService studentService) {
this.studentService = studentService;
}

@GetMapping("/home")
public String home(Model model) {
model.addAttribute("username", "John Doe");
return "home";
}

@PostMapping("/register")
public void registerStudent(@RequestBody Student student) {
studentService.registerStudent(student);
}

@GetMapping("/get_student/{id}")
public Optional getStudent(@PathVariable Long id) {
return studentService.getStudent(id);
}

@GetMapping("/getStudents")
public ArrayList getStudents() {
return studentService.getStudents();
}
< /code>
So sieht meine dynamische Seite aus: < /p>




Welcome Homepage For Students


Welcome to University, to University!


< /code>
Dies sind meine Abhängigkeiten mit Gradle: < /p>

dependencies {
implementation("org.springframework.boot:spring-boot-starter-data-jpa")
implementation("org.springframework.boot:spring-boot-starter-web")
implementation("org.springframework.security:spring-security-web")
implementation("org.springframework.boot:spring-boot-starter-security:3.4.1")
implementation("io.jsonwebtoken:jjwt-api:0.12.6")
implementation("org.springframework:spring-webmvc:6.2.2")
implementation("org.apache.tomcat:tomcat-jasper:10.1.34")
// implementation("org.thymeleaf:thymeleaf:3.1.3.RELEASE")
implementation("org.springframework.boot:spring-boot-starter-thymeleaf")

compileOnly("org.projectlombok:lombok:1.18.36")

runtimeOnly("io.jsonwebtoken:jjwt-impl:0.12.6")
runtimeOnly("io.jsonwebtoken:jjwt-jackson:0.12.6")
runtimeOnly("org.postgresql:postgresql")
testImplementation("org.springframework.boot:spring-boot-starter-test")
testRuntimeOnly("org.junit.platform:junit-platform-launcher")
}

< /code>
So sieht mein Protokoll aus, wenn ich die Anwendung ausführe und versuche, den Endpunkt zu treffen: < /p>
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/

:: Spring Boot :: (v3.4.1)

2025-02-08T09:24:16.263+01:00 INFO 23567 --- [student-1] [ main] com.demo.student1.Student1Application : Starting Student1Application using Java 21.0.5 with PID 23567 (/home/isla-jr/Documents/se-workspace/learn-java/roadmap/4-web-frameworks/1-basic/student-1/build/classes/java/main started by isla-jr in /home/isla-jr/Documents/se-workspace/learn-java/roadmap/4-web-frameworks/1-basic/student-1)
2025-02-08T09:24:16.265+01:00 INFO 23567 --- [student-1] [ main] com.demo.student1.Student1Application : No active profile set, falling back to 1 default profile: "default"
2025-02-08T09:24:16.814+01:00 INFO 23567 --- [student-1] [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2025-02-08T09:24:16.867+01:00 INFO 23567 --- [student-1] [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 44 ms. Found 2 JPA repository interfaces.
2025-02-08T09:24:17.313+01:00 INFO 23567 --- [student-1] [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http)
2025-02-08T09:24:17.325+01:00 INFO 23567 --- [student-1] [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2025-02-08T09:24:17.325+01:00 INFO 23567 --- [student-1] [ main] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.34]
2025-02-08T09:24:17.457+01:00 INFO 23567 --- [student-1] [ main] org.apache.jasper.servlet.TldScanner : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2025-02-08T09:24:17.460+01:00 INFO 23567 --- [student-1] [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2025-02-08T09:24:17.460+01:00 INFO 23567 --- [student-1] [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1154 ms
2025-02-08T09:24:17.617+01:00 INFO 23567 --- [student-1] [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2025-02-08T09:24:17.660+01:00 INFO 23567 --- [student-1] [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 6.6.4.Final
2025-02-08T09:24:17.684+01:00 INFO 23567 --- [student-1] [ main] o.h.c.internal.RegionFactoryInitiator : HHH000026: Second-level cache disabled
2025-02-08T09:24:17.923+01:00 INFO 23567 --- [student-1] [ main] o.s.o.j.p.SpringPersistenceUnitInfo : No LoadTimeWeaver setup: ignoring JPA class transformer
2025-02-08T09:24:17.945+01:00 INFO 23567 --- [student-1] [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2025-02-08T09:24:18.012+01:00 INFO 23567 --- [student-1] [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Added connection org.postgresql.jdbc.PgConnection@7b3a6e95
2025-02-08T09:24:18.013+01:00 INFO 23567 --- [student-1] [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2025-02-08T09:24:18.060+01:00 INFO 23567 --- [student-1] [ main] org.hibernate.orm.connections.pooling : HHH10001005: Database info:
Database JDBC URL [Connecting through datasource 'HikariDataSource (HikariPool-1)']
Database driver: undefined/unknown
Database version: 16.3
Autocommit mode: undefined/unknown
Isolation level: undefined/unknown
Minimum pool size: undefined/unknown
Maximum pool size: undefined/unknown
2025-02-08T09:24:18.834+01:00 INFO 23567 --- [student-1] [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000489: No JTA platform available (set 'hibernate.transaction.jta.platform' to enable JTA platform integration)
2025-02-08T09:24:18.881+01:00 INFO 23567 --- [student-1] [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2025-02-08T09:24:19.173+01:00 INFO 23567 --- [student-1] [ main] eAuthenticationProviderManagerConfigurer : Global AuthenticationManager configured with AuthenticationProvider bean with name authenticationProvider
2025-02-08T09:24:19.173+01:00 WARN 23567 --- [student-1] [ main] r$InitializeUserDetailsManagerConfigurer : Global AuthenticationManager configured with an AuthenticationProvider bean. UserDetailsService beans will not be used by Spring Security for automatically configuring username/password login. Consider removing the AuthenticationProvider bean. Alternatively, consider using the UserDetailsService in a manually instantiated DaoAuthenticationProvider. If the current configuration is intentional, to turn off this warning, increase the logging level of 'org.springframework.security.config.annotation.authentication.configuration.InitializeUserDetailsBeanManagerConfigurer' to ERROR
2025-02-08T09:24:19.182+01:00 WARN 23567 --- [student-1] [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2025-02-08T09:24:19.636+01:00 INFO 23567 --- [student-1] [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port 8080 (http) with context path '/'
2025-02-08T09:24:19.645+01:00 INFO 23567 --- [student-1] [ main] com.demo.student1.Student1Application : Started Student1Application in 3.747 seconds (process running for 4.303)
2025-02-08T09:24:45.131+01:00 INFO 23567 --- [student-1] [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2025-02-08T09:24:45.131+01:00 INFO 23567 --- [student-1] [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2025-02-08T09:24:45.133+01:00 INFO 23567 --- [student-1] [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 1 ms
Hibernate: select u1_0.id,u1_0.password,u1_0.username from public.users_v1 u1_0 where u1_0.username=?
2025-02-08T09:24:51.499+01:00 WARN 23567 --- [student-1] [nio-8080-exec-7] o.s.web.servlet.PageNotFound : No mapping for GET /favicon.ico
2025-02-08T09:24:51.502+01:00 WARN 23567 --- [student-1] [nio-8080-exec-7] o.s.web.servlet.PageNotFound : No endpoint GET /favicon.ico.
< /code>
Schließlich bin ich jedes Mal, wenn ich den Endpunkt drücke:
Browser, der eine Zeichenfolge anstelle einer dynamischen Seite zurückgibt. < /p < /p>