Spring boot application downloading JSP while hitting target, but not HTML

Question

When I am hitting the URL it is downloading the JSP page but when I am using HTML page, it gets rendered in the browser. || HTML 1 - 0 JSP ||

Project structure

Application properties:

spring.mvc.view.prefix=/views/
spring.mvc.view.suffix=.html

Controller

It worked when I have added tomcat-embed-jasper dependency. Why does that happened?

As JSP will get compiled to Servlet first and to run the servlet, we need a servlet enabled container. i.e. we need a container which can process the servlets and Tomcat is one of them. You can remove the embed tomcat and can run outside tomcat by building a war too.... — DEBENDRA DHINDA, May 03 '19 at 11:14

score 1 · Answer 1 · answered May 03 '19 at 11:13

1

- It worked when I have added tomcat-embed-jasper dependency. Why does that happened?

Because it needs a webapp container.

answered May 03 '19 at 11:13

As JSP will get compiled to Servlet first and to run the servlet, we need a servlet enabled container. i.e. we need a container which can process the servlets and Tomcat is one of them. You can remove the embed tomcat and can run outside tomcat by building a war too.... – DEBENDRA DHINDA May 03 '19 at 11:15

score 1 · Answer 2 · answered Nov 04 '22 at 07:21

I have came across with the same issue, file download every-time when i hit the Page. So, I have makes some changes & error has resolved.

Adding "tomcat-embed-jasper" in pom.xml file
having same version of your tomcat
org.apache.tomcat.embed tomcat-embed-jasper 9.0.68

score 0 · Answer 3 · answered May 03 '19 at 09:19

0

Embedded tomcat consider jsp rendering as optional. That's why it is needed.Also As I can understand. You must have provided scope of tomcat-embed-jasper dependency as provided.

answered May 03 '19 at 09:19

Sritam Jagadev

955
4
18
46

score 0 · Answer 4 · answered May 03 '19 at 11:05

You can do as below :

DemoController.java :

@Controller
public class DemoController {    
    @GetMapping("/")
    public String getLoginView(){
        return "login";  
    }       
    @GetMapping("/welcoome")
    public String welcome(){
        return "login";   
    }
}

ApplicationConfigurerAdapter.java

@Configuration
@EnableWebMvc
public class ApplicationConfigurerAdapter extends WebMvcConfigurerAdapter{

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

    @Bean
    public InternalResourceViewResolver viewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        return resolver;
    }
}

DemoApplication.java

@Configuration
@EnableAutoConfiguration
@SpringBootApplication
public class DemoApplication extends SpringBootServletInitializer{

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

application.properties

server.contextPath=/
server.servlet.contextPath=/

server.port=6565

pom.xml

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
    </dependency>   
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

You can build it as mvn package and can also run outside container(such as Tomcat)

I am using spring boot, and don't want to make a viewResolver — Ashutosh Sharma, May 03 '19 at 11:58
Not an issue . You can mention spring.mvc.view.prefix=/views/ spring.mvc.view.suffix=.html — DEBENDRA DHINDA, May 04 '19 at 12:55
The problem is that I am able to render HTML pages but not JSP. doing this will allow spring to find *.html views only. — Ashutosh Sharma, May 05 '19 at 19:07
@AshutoshSharma extend your main class from SpringBootServletInitializer and place EnableWebMvc annotation ....you can able to render JSPs too.. But yes, you need an servlet processing container — DEBENDRA DHINDA, May 06 '19 at 04:50

score 0 · Answer 5 · answered Nov 19 '22 at 10:55

0

Add this tomcat dependancy to your pom file:

<dependency>
   <groupId>org.apache.tomcat.embed</groupId>
   <artifactId>tomcat-embed-jasper</artifactId>
</dependency>

answered Nov 19 '22 at 10:55

Jdslk

97
3
8