How to display JSP files in browser correctly?-CodePudding

I'm following the article where there are JSP files and I'm struggling with displaying them correctly in browser.

In my project I have LoginController class as:

@Controller
@RequestMapping("/api/page")
public class LoginController {

    @GetMapping("/welcomePage")
    public ModelAndView welcomePage() {
        ModelAndView model = new ModelAndView();
        model.setViewName("welcomePage");
        return model;
    }

    /*
     * Updated homePage.jsp file to provide User and Admin Roles specific activities.
     * homePage.jsp
     */
    @GetMapping("/homePage")
    public ModelAndView homePage() {
        ModelAndView model = new ModelAndView();
        model.setViewName("homePage");
        return model;
    }

    /*
     * '/userPage' is used by USER Role to access and perform Normal user activities.
     */
    @GetMapping("/userPage")
    public ModelAndView userPage() {
        ModelAndView model = new ModelAndView();
        model.setViewName("userPage");
        return model;
    }

    /*
     * '/adminPage' is used by ADMIN Role to access and perform Admin user activities.
     * ADMIN role can access “/userPage” URL too.
     */
    @GetMapping("/adminPage")
    public ModelAndView adminPage() {
        ModelAndView model = new ModelAndView();
        model.setViewName("adminPage");
        return model;
    }

    @GetMapping("/loginPage")
    public ModelAndView loginPage(@RequestParam(value = "error",required = false) String error,
                                  @RequestParam(value = "logout",   required = false) String logout) {

        ModelAndView model = new ModelAndView();
        if (error != null) {
            model.addObject("error", "Invalid Credentials provided.");
        }

        if (logout != null) {
            model.addObject("message", "Logged out from successfully.");
        }

        model.setViewName("loginPage");
        return model;
    }
}

Also I have some JSP files which are locating inside /WEB-INF/view as stated in this & this answer:

adminPage.jsp:

<%@taglib prefix="c" uri="https://java.sun.com/jsp/jstl/core"%>
<h3>Admin Page</h3>

<c:url value="/logout" var="logoutUrl" />
<form id="logout" action="${logoutUrl}" method="post" >
    <input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}" />
</form>
<c:if test="${pageContext.request.userPrincipal.name != null}">
    <a href="javascript:document.getElementById('logout').submit()">Logout</a>
</c:if>

homePage.jsp

<%@taglib prefix="c" uri="https://java.sun.com/jsp/jstl/core"%>
<a href="${pageContext.request.contextPath}/userPage">User</a> | <a href="${pageContext.request.contextPath}/adminPage">Admin</a> | <a href="javascript:document.getElementById('logout').submit()">Logout</a>

<h3>Welcome to Rest API Application</h3>
<ul>
    <li>Java 8 tutorial</li>
    <li>Spring tutorial</li>
    <li>Gradle tutorial</li>
    <li>BigData tutorial</li>
</ul>

<c:url value="/logout" var="logoutUrl" />
<form id="logout" action="${logoutUrl}" method="post" >
    <input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}" />
</form>

loginPage.jsp

<%@ include file="welcomePage.html" %>
<hr/>

<h3>Login Form</h3>
<%
    String profile_msg = (String) request.getAttribute("profile_msg");
    if (profile_msg != null) {
        out.print(profile_msg);
    }
    String login_msg = (String) request.getAttribute("login_msg");
    if (login_msg != null) {
        out.print(login_msg);
    }
%>
<br/>
<form action="loginPage.jsp" method="post">
    Email:<input type="text" name="email"/><br/><br/>
    Password:<input type="password" name="password"/><br/><br/>
    <input type="submit" value="login"/>"
</form>

userPage.jsp

<%@taglib prefix="c" uri="https://java.sun.com/jsp/jstl/core"%>
<h3>User Page</h3>

<c:url value="/logout" var="logoutUrl" />
<form id="logout" action="${logoutUrl}" method="post" >
    <input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}" />
</form>
<c:if test="${pageContext.request.userPrincipal.name != null}">
    <a href="javascript:document.getElementById('logout').submit()">Logout</a>
</c:if>

In my application I have application.properties with configurations as:

spring.mvc.view.prefix=/webapp/WEB-INF/view/
spring.mvc.view.suffix=.jsp

But I'm getting always the error as:

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Mon Dec 19 20:54:05 CET 2022
There was an unexpected error (type=Internal Server Error, status=500).

My POM file contains:

<dependencies>

    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
    </dependency>

    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-boot-starter</artifactId>
        <version>3.0.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-validation</artifactId>
        <version>2.3.2.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>2.4.4</version>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.5</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.12</version>
        <scope>provided</scope>
    </dependency>
    <!--<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.thymeleaf.extras</groupId>
        <artifactId>thymeleaf-extras-springsecurity5</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-tomcat</artifactId>
    </dependency>
    <dependency>
        <groupId>org.glassfish.web</groupId>
        <artifactId>jakarta.servlet.jsp.jstl</artifactId>
        <version>3.0.1</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
</dependencies>


<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>2.22.2</version>
            <configuration>
                <includes>
                    <include>**/*.java</include>
                </includes>
            </configuration>
        </plugin>
    </plugins>
</build>

Can someone tell, please, am I missing something and what do I need to add to display them in my browser correctly? Can it be the confusing with Spring Security configuration?

My current logs.

I can provide more information if it helps to detect the cause of issue.

Thank you in advance for any smart ideas.

CodePudding user response：

The workaround is:

after I put all JSP files instead of /webapp/WEB-INF/view/ directory to /resources/templates/jsp/.

And added inside application.properties instead:

spring.mvc.view.prefix=/WEB-INF/view/
spring.mvc.view.suffix=.jsp

another classpath:

spring.thymeleaf.prefix=classpath:/templates/jsp/
spring.thymeleaf.suffix=.jsp

it started work for me.

Also be aware if you have all important dependencies inside POM as:

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</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-data-jpa</artifactId>
    </dependency>