Spring boot application not working properly in tomcat server - spring-boot

Question

I have created a small project in spring boot and spring security. It is running perfectly in spring tool suite. And I have created the war file using maven install and deployed to tomcat 9 and trying to run the project. It's opening the login page with out applying the CSS. I have entered the user name and password and submitted. After submitting it's giving HTTP Status 404 – Not Found error. Please help me what went wrong here.
Here is my 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>2.2.6.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>org.home.ledger</groupId>
<artifactId>HomeLedger</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>HomeLedger</name>
<description>HomeLedger</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-security -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
<version>2.2.6.RELEASE</version><!-- $NO-MVN-MAN-VER$ -->
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat.embed/tomcat-embed-jasper -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version><!--$NO-MVN-MAN-VER$ -->
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl-api -->
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<version>2.2.6.RELEASE</version><!--$NO-MVN-MAN-VER$ -->
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version><!--$NO-MVN-MAN-VER$ -->
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-mail -->
<!-- <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId>
<version>2.2.6.RELEASE</version>$NO-MVN-MAN-VER$ </dependency> -->
<!-- https://mvnrepository.com/artifact/org.springframework.session/spring-session-core -->
<!-- <dependency> <groupId>org.springframework.session</groupId> <artifactId>spring-session-core</artifactId>
<version>2.2.2.RELEASE</version>$NO-MVN-MAN-VER$ </dependency> -->
<!-- https://mvnrepository.com/artifact/org.springframework.session/spring-session-jdbc -->
<!-- <dependency> <groupId>org.springframework.session</groupId> <artifactId>spring-session-jdbc</artifactId>
<version>2.2.2.RELEASE</version>$NO-MVN-MAN-VER$ </dependency> -->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Here my application main class package org.home.ledger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
#SpringBootApplication
public class HomeLedgerApplication extends SpringBootServletInitializer{
public static void main(String[] args) {
SpringApplication.run(HomeLedgerApplication.class, args);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(HomeLedgerApplication.class);
}
}

Answer 1

Because the context path in Tomcat is generate based on the WAR file name you must use c:url in your JSP files that URL rewriting is happening:
Read more here https://www.tutorialspoint.com/jsp/jstl_core_url_tag.htm
That way the path independent from the URL it self.