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Spring Boot jsp files cannot be found

 原文  2017-05-03 10:39:07  0   1    spring/ jsp/ spring-mvc/ intellij-idea/ spring-boot

Question

I'm developing simple Spring Boot MVC application. Previously I had everything working with just Spring + Hibernate (that is there was servlet.xml etc.) and I'm trying to rebuild project to use Spring Boot. Althought I have read many answers on SO I still can't fix Spring Boot not finding my .jsp files - it displays whitelabel error page.
Many answers on SO are about including tomcat-embed-jasper and jstl in pom.xml but I already have it. I'm using IntelliJ IDEA 17 Ultimate, Tomcat 8.5.13, latest versions of Spring and Spring Boot.

Project structure:
在此处输入图片说明

Pom.xml: 

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">

<modelVersion>4.0.0</modelVersion>
<artifactId>spring-invoice</artifactId>
<groupId>spring-invoice</groupId>
<version>1.0.0</version>
<packaging>war</packaging>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.3.RELEASE</version>
</parent>

<properties>
    <springframework.version>4.3.8.RELEASE</springframework.version>
    <hibernate.version>5.2.9.Final</hibernate.version>
    <mysql.connector.version>5.1.41</mysql.connector.version>
    <hibernatevalidator.version>5.4.1.Final</hibernatevalidator.version>
    <start-class>com.invoices.Application</start-class>
</properties>

<dependencies>

    <!-- Spring boot -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </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-tomcat</artifactId>
    </dependency>

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

    <!-- Spring -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <!-- Hibernate -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>${hibernate.version}</version>
    </dependency>

    <!-- Hibernate validator -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>${hibernatevalidator.version}</version>
    </dependency>

    <!-- MySQL -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${mysql.connector.version}</version>
    </dependency>

    <!-- C3PO -->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.2</version>
    </dependency>

    <!-- Servlet + JSP + JSTL -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>javax.servlet.jsp-api</artifactId>
        <version>2.3.1</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

</dependencies>

<build>

    <finalName>spring-invoice</finalName>

    <plugins>

        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>

        <!-- The Compiler Plugin is used to compile the sources of project -->
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.6.0</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>

        <!-- Builds a Web Application Archive (WAR) file from the project output and its dependencies. -->
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <version>3.0.0</version>
            <configuration>
                <failOnMissingWebXml>false</failOnMissingWebXml>
            </configuration>
        </plugin>

    </plugins>

</build>

</project>

application.properties file 

# Database
spring.datasource.url=jdbc:mysql://localhost:3306/fakturowanie
spring.datasource.username=root
spring.datasource.password=1234
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.database-platform=org.hibernate.dialect.MySQL5Dialect

# Hibernate
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true

entitymanager.packagesToScan=com.invoices
spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.ImprovedNamingStrategy

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

Application class 

@SpringBootApplication
public class Application extends SpringBootServletInitializer
{
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application)
    {
        return application.sources(Application.class);
    }

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

One of my jsp files 

 <%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html lang="pl-PL"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Zarządzaj kontrahentami</title> </head> <body> <div id="wrapper"> <div id="header"> <h2>Zarządzaj kontrahentami</h2> </div> </div> <div> <div> <!-- put new button: Add Customer --> <input type="button" value="Dodaj nowego kontrahenta" onclick="window.location.href='addCustomer'; return false;" class="add-button"/> <table> <tr> <th>Alias</th> <th>Nazwisko</th> <th>Imię</th> <th>Nazwa firmy</th> <th>NIP/PESEL</th> <th>Ulica i nr mieszkania</th> <th>Kod pocztowy</th> <th>Miejscowość</th> <th>Sposób zapłaty</th> <th>Uwzględnij numer faktury</th> </tr> <c:forEach var="tempCustomer" items="${allCustomers}"> <c:url var="updateLink" value="/customers/updateCustomer"> <c:param name="customerID" value="${tempCustomer.id}"/> </c:url> <c:url var="deleteLink" value="/customers/deleteCustomer"> <c:param name="customerID" value="${tempCustomer.id}"/> </c:url> <tr> <td>${tempCustomer.alias}</td> <td>${tempCustomer.lastName}</td> <td>${tempCustomer.firstName}</td> <td>${tempCustomer.companyName}</td> <td>${tempCustomer.taxIdentifier}</td> <td>${tempCustomer.postalCode}</td> <td>${tempCustomer.city}</td> <td>${tempCustomer.paymentMethod}</td> <td>${tempCustomer.includeInCount}</td> <td> <!-- display the update and delete link --> <a href="${updateLink}">Edytuj</a> | <a href="${deleteLink}" onclick="if (!(confirm( 'Czy na pewno usunąć tego kontrahenta?'))) return false">Usuń</a> </td> </tr> </c:forEach> </table> </div> </div> </body> </html>

And controller of it 

@Controller
@RequestMapping("/customers")
public class CustomersController implements IUtilities<Customer>
{
    @Autowired
    private ICustomerDAO customerDAO;

    @GetMapping("/manageCustomers")
    public String manageCustomers(Model model)
    {
        List<Customer> allCustomers = convertIterableToCollection(customerDAO.findAll());
        model.addAttribute("allCustomers", allCustomers);
        return "manage-customers";
    }

    @GetMapping("/addCustomer")
    public String showFormForAdd(Model model)
    {
        // create model attribute to bind form data
        Customer theCustomer = new Customer();

        model.addAttribute("customerToEdit", theCustomer);

        return "customer-form";
    }

    @GetMapping("/updateCustomer")
    public String showFormForUpdate(@RequestParam("customerID") int customerId, Model model)
    {
        // get the customer from service
        Customer theCustomer = customerDAO.findOne(customerId);
        model.addAttribute("customerToEdit", theCustomer);

        //redirect to update form
        return "customer-form";
    }

    @GetMapping("/deleteCustomer")
    public String deleteCustomer(@RequestParam("customerID") int customerId)
    {
        //delete the customer
        customerDAO.delete(customerId);

        return "redirect:/customers/manageCustomers";
    }

    @PostMapping("/saveCustomer")
    public String saveCustomer(@ModelAttribute("customerToEdit") Customer customer) {
        //save the customer using our service
        customerDAO.save(customer);

        return "redirect:/customers/manageCustomers";
    }

    @Override
    public List<Customer> convertIterableToCollection(Iterable<Customer> iterable) {
        List<Customer> list = new ArrayList<>();
        iterable.forEach(list::add);
        return list;
    }
}

1 answers

solution1
 2 ACCPTED  2017-05-03 10:50:15

You are using Spring Boot but your pom is riddled with conflicting dependencies. For starters cleanup your pom.xml . Also in your pom you should take into account what is being done in the JSP Samples pom.xml (Which means at least make the spring-boot-starter-tomcat provided instead of the default compile scope.

Finally you don't need the maven-compile and maven-war plugins as those are already inherited from the parent. 

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">

<modelVersion>4.0.0</modelVersion>
<artifactId>spring-invoice</artifactId>
<groupId>spring-invoice</groupId>
<version>1.0.0</version>
<packaging>war</packaging>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.3.RELEASE</version>
</parent>

<properties>
    <hibernate.version>5.2.9.Final</hibernate.version>
    <start-class>com.invoices.Application</start-class>
</properties>

<dependencies>

    <!-- Spring boot -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </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-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>

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

    <!-- MySQL -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>

    <!-- C3PO -->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.2</version>
    </dependency>

    <!-- Servlet + JSP + JSTL -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>

</dependencies>

<build>

    <finalName>spring-invoice</finalName>

    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
  </plugins>

</build>

</project>

Also take into account the limitations there are when using Spring Boot with JSPs.

However the actual problem is your project structure, you are using Maven with should have a src/main/java directory for your java sources and all your web related things should be in src/main/webapp instead of web , further non java related resources should be in src/main/resources . Due to not having this default structure files aren't going to be copied to the correct location (actually they will be ignored).

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