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问题:
Can't load a very simple JSP page with spring-boot, getting 404 Not Found.
src/main/java/SampleWebJspApplication.java
@Configuration @EnableAutoConfiguration @ComponentScan public class SampleWebJspApplication extends SpringBootServletInitializer { public static void main(String[] args) throws Exception { SpringApplication.run(SampleWebJspApplication.class, args); } }
src/main/java/WebController.java
@Controller public class WebController { @RequestMapping("/") public String welcome() { return "welcome"; } }
src/main/webapp/WEB-INF/jsp/welcome.jsp
<!DOCTYPE html> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <html lang="en"> <body> <h1>Hello.</h1> </body> </html>
Getting 404 even though debugger shows that "welcome" is being returned from the Controller RequestMapping.
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Sat Mar 07 19:35:15 EST 2015 There was an unexpected error (type=Not Found, status=404).
回答1:
I have already tried many solutions, but couldn't find a working one.
If you are using Intellij IDEA
$ cd {your_project_folder_path} $ ls //Check if you are in the same place with the pom.xml
and then type
$ mvn spring-boot:run
Now your application is served at localhost:8080.
回答2:
I needed to add this to my application.properties file:
spring.view.prefix: /WEB-INF/jsp/ spring.view.suffix: .jsp
回答3:
In latest spring versions, the properties to be put in application.properties file look like following:
spring.mvc.view.prefix=/WEB-INF/jsp/ spring.mvc.view.suffix=.jsp
Note "mvc" included in "spring.view.prefix"
Also, in newer versions of Spring, there is an annotation @SpringBootApplication for @Configuration, @EnableAutoConfiguration, @ComponentScan
回答4:
Normally Spring boot doesnot require any configuration besides adding dependency while working with Thymeleaf.
To run JSP in Spring Boot, you have to have some configurations:
Dependencies needed:
<dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> </dependency>
If you are connecting with MySQL Database then:
<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency>
In Application.Properties file:
spring.mvc.view.prefix: /WEB-INF/jsp/ spring.mvc.view.suffix: .jsp
Now your Good to go !!! :D
