Spring启动-白标错误

Question

我正在构建一个spring boot应用程序，在从eclipse运行项目的同时，它可以完美地工作，页面加载正常。但当我构建maven并生成JAR文件并尝试执行时，JSP页面没有加载，它显示了白标签错误。

应用属性

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

文件夹结构

波姆。xml

这个项目pom xml与所有的depeden

<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>
<groupId>testproject</groupId>
<artifactId>testproject</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>HB</name>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.4.RELEASE</version>
    <!-- <version>2.0.2.RELEASE</version> -->
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
         <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <!-- <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> 
        </dependency> -->
    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    <!-- <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> 
        <version>0.6.0</version> </dependency> -->
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
    </dependency>

    <!-- <dependency> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-resources-plugin</artifactId> 
        <version>3.0.2</version> </dependency> -->

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

    <!-- <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> 
        <version>1.2</version> </dependency> -->


    <dependency>
        <groupId>org.springframework.security.oauth</groupId>
        <artifactId>spring-security-oauth2</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-jwt</artifactId>
    </dependency>
    <!-- <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> 
        </dependency> -->
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
    </dependency>

    <dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>2.2.11</version>
    </dependency>
    <dependency>
        <groupId>com.sun.xml.bind</groupId>
        <artifactId>jaxb-core</artifactId>
        <version>2.2.11</version>
    </dependency>
    <dependency>
        <groupId>com.sun.xml.bind</groupId>
        <artifactId>jaxb-impl</artifactId>
        <version>2.2.11</version>
    </dependency>
    <dependency>
        <groupId>javax.activation</groupId>
        <artifactId>activation</artifactId>
        <version>1.1.1</version>
    </dependency>
    <!-- <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> 
        </dependency> -->

</dependencies>

<properties>
    <!-- <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> -->
    <java.version>1.8</java.version>
</properties>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <executable>true</executable>
            </configuration>
        </plugin>
    </plugins>
</build>

</project>

Spring启动类文件

@SpringBootApplication
@ComponentScan(basePackages= {"com.testproject", 
"com.testproject.controller"})
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);
}
}

Answer 1

试试这个：

挪动你的手。此目录下的jsp文件：src/main/resources/META-INF/resources/WEB-INF/jsp/

还有你的申请。房产应该是这样的：[和你的一样没有变化]

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

spring.mvc.view.suffix=.jsp

在跑步前做一个干净的包裹

mvn clean package
java -jar path-to-jar

还可以从tomcat嵌入jasper依赖项中删除或注释作用域

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

注意：这在Spring Boot 2.0.1及以上版本中不起作用，因为Tomcat中的硬编码文件模式已被删除

更多细节请参考这里

Answer 2

好啊第一件事

将动态内容（如JSP页面）放置到静态位置不起作用。

在war项目中，JSP页面由src/main/webapp/WEB-INF/提供。

在Jar项目中，JSP页面不能简单地从webapp位置或src/main/resources/提供。

这是因为boot ref文档中规定的限制。

因此，您可以在下面的位置src/main/resources/META-INF/resources添加动态页面/

和属性文件

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

更多细节请参考这里

Answer 3

确保依赖项列表中有jasper和jstl：

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

这是一个正在进行的初步项目-https://github.com/spring-projects/spring-boot/tree/master/spring-boot-samples/spring-boot-sample-web-jsp