java - Springboot Whitelabel 错误页面，状态为 404 : unable to resolve path of JSP

Question

我正在开发一个 spring-boot 项目，我使用 JSP 文件并给出Whitelabel 错误页面。 出现意外错误(类型=未找到，状态=404)。

我已将 JSP 放在/src/main/webapp/pages/中，并且已使用应用程序属性给出了路径。

它有几个模块，主要组件不包括 spring-boot 依赖项，它只包括所需的特定模块。从其他模块继承的代码已与 spring-boot 模块一起使用，因为它无法单独构建。

特定的子模块不包含 spring-boot 父模块作为父模块，因为必须在此时定义父模块。

pom.xml(由于隐私问题，一些作为依赖项继承的子模块必须从pom中删除)

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <groupId>com.epic.cb</groupId>
        <artifactId>EPICCB</artifactId>
        <version>V1.00</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>M_EOD</artifactId>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.boot.eod.version>1.5.4.RELEASE</spring.boot.eod.version>
        <spring.eod.version>4.3.4.RELEASE</spring.eod.version>
        <apache.tomcat.version>7.0.55</apache.tomcat.version>
        <com.epic.cb.version>V1.00</com.epic.cb.version>
        <sql.version>6.2.1.jre8</sql.version>
        <jquery.version>3.1.1</jquery.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>${spring.boot.eod.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <version>${spring.boot.eod.version}</version>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-batch</artifactId>
            <version>${spring.boot.eod.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <version>${spring.boot.eod.version}</version>
        </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>
            <version>${apache.tomcat.version}</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>${jquery.version}</version>
        </dependency>

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

        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <version>${sql.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-dbcp</artifactId>
            <version>${apache.tomcat.version}</version>
        </dependency>
    <dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.0.0</version>
            </plugin>
        </plugins>
    </build>
</project>

应用程序属性

server.port=8589

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

EodController.java

@Controller
public class EodController {

    @Autowired
    EodSchedulerService eodSchedulerService;

    @ResponseBody
    @RequestMapping(value = "/", method = {RequestMethod.GET})
    public String viewMain() {
        return "Hello World !!!";
    }

    @RequestMapping(value = "/viewEODDashboard", method = {RequestMethod.GET})
    public String viewEODDashboard() {
        return "eodTaskDashboard";
    }

    @RequestMapping(value = "/executeEodTasks", method = {RequestMethod.GET})
    @ResponseStatus(code = HttpStatus.OK)
    public void approveEODDashboard() {
        eodSchedulerService.executeScheduledTasks();
    }
}

EodStartup.java

@SpringBootApplication
@ComponentScan("com.epic.cb.*")
public class EodStartup {

    public EodStartup() {
        //default constructor
    }

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

文件结构

├── src
     ├── main
     |    ├── java
     │    │   └── com
     │    │        └── epic
     │    │             └── cb
     │    │                  └── eod
     │    │                       ├── EodStartup.java
     │    │                       └── controller
     │    │                              └── EodController.java 
     |    |
     │    ├── resources
     │    |     └── application.properties
     │    └── webapp
     │          └── WEB-INF
     │                 └── pages
     │                       └── eodTaskDashboard.jsp

以下是我提到的一些链接:

1. Why do I always get Whitelabel Error Page with status "404" while running a simple Spring Boot Application
2. Spring Boot JSP 404.Whitelabel Error Page
3. Tomcat-embed-jasper added but jsp pages Whitelabel 404 Error
4. Getting whitelabel error page when running springboot application等等..

我想用JSP解决这个问题。 (因为它还有其他几个选项，例如:Thymeleaf)

提前谢谢您!

Answer 1

如果您使用嵌入式 tomcat，请尝试提供此依赖项，其范围为“已提供”:

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

对于JSP文件，放入src/main/webapp/WEB-INF/pages/并将资源放在 /src/main/resources/ 下Springboot 希望维护此层次结构，但从您的项目结构来看，它是不正确的。