How to read jsp file with spring boot?
Question
I'm trying to read my jsp file using spring-boot so i start the project and when i check my localhost it actually return the actual string "index" but not reading it as index.jsp (as jsp file)
I've created Controller Class "HomeController" and implement a method named homePage which will have @RequestMapping then it will return "index"
HomeController
@RestController
public class HomeController {
@RequestMapping("/showHome")
public String homePage(){
return "index";
}
}
index.jsp file
<!DOCTYPE html>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<html lang="en">
<body>
<div>
<div>
<h1>Spring Boot JSP Example</h1>
<h2>Hello</h2>
</div>
</div>
</body>
</html>
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.8.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
application.properties
spring.mvc.view.prefix=/WEB-INF/views/
spring.mvc.view.suffix=.jsp
project stucture
I've got "index" string in my browser was excpecting the jsp file to load NB: when i replace @ResController with @Controller i get Whitelabel Error Page.
3 answers
solution1
0 2019-09-06 11:46:46
you should use @Controller if you want to return jsp file. @RestController returns a string
@Controller
public class HomeController {
@RequestMapping("/showHome")
public String homePage(){
return "index";
}
}
for configurations create WebConfig.java file and write in these:
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = {
"com.example.demo"
})
public class WebConfig implements WebMvcConfigurer {
@Bean
public InternalResourceViewResolver getInternalResourceViewResolver(){
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/views/");
resolver.setSuffix(".jsp");
return resolver;
}
}
Advise: see this link for more: Hello Horld in Spring Boot
solution2
0 2019-09-06 15:06:49
Had to change my pom.xml file dependecies where i import tomcat-embed and javax.servelet to
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<version>8.5.20</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
solution3
0 ACCPTED 2019-09-06 15:40:14
Remove this two line from application.properties file
spring.mvc.view.prefix=/WEB-INF/views/
spring.mvc.view.suffix=.jsp
and Delete templates folder from resource package.
Then add this class in your com.example.demo package.
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
@EnableWebMvc
@ComponentScan(basePackages= {"com.example"})
public class WebConfig implements WebMvcConfigurer {
public void configureViewResolvers(ViewResolverRegistry registry) {
registry.jsp().prefix("/WEB-INF/views/").suffix(".jsp");
}
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
}
In controller use:
@Controller not @RestController
Like:
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
public class TestController {
@RequestMapping(value = "/showHome", method = RequestMethod.GET)
public String homePage() {
return "index";
}
}
Sample Blog site application (git source code ) with Spring Boot and Hibernate you may get help from here.
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