我正在尝试创建一个Spring Boot Web应用程序，但我无法查看.jsp页面。一切似乎都很好，但当我尝试访问第一页（index.jsp）时，我收到以下错误消息。有任何想法吗？
TIA
org.apache.jasper.JasperException: Unable to compile class for JSP
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:661) ~[tomcat-jasper-7.0.47.jar:7.0.47]
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357) ~[tomcat-jasper-7.0.47.jar:7.0.47]
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) ~[tomcat-jasper-7.0.47.jar:7.0.47]
Caused by: java.lang.ClassCastException: org.apache.el.ExpressionFactoryImpl cannot be cast to javax.el.ExpressionFactory
at javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:198) ~[tomcat-embed-el-8.0.32.jar:8.0.32]
at javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:117) ~[tomcat-embed-el-8.0.32.jar:8.0.32]
这是我的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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>mil.navy.ecClient</groupId>
<artifactId>ec-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>ec-client</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.7</java.version>
<app.properties>src/main/resources/application.properties</app.properties>
<!-- List of variables read from application.properties: ${defaultUri} -->
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.6</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-ws</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>ec</finalName>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
<version>3.5.1</version>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<port>8080</port>
<path>/ec</path>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>properties-maven-plugin</artifactId>
<version>1.0.0</version>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>read-project-properties</goal>
</goals>
<configuration>
<files>
<file>${app.properties}</file>
</files>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
控制器类：
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class FirstPageController {
@Autowired
DataSource dataSource;
@RequestMapping(value = "/")
public ModelAndView showFirstPage() {
System.out.println("first page");
ModelAndView mav = new ModelAndView("index1");
return mav;
}
}
申请类：
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@EnableAutoConfiguration
@EnableWebMvc
@SpringBootApplication
public class EcClientApplication extends SpringBootServletInitializer {
private static Class<EcClientApplication> ecApplication = EcClientApplication.class;
public static void main(String[] args) {
SpringApplication.run(EcClientApplication.class, args);
}
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder applicationBuilder) {
return applicationBuilder.sources(ecApplication);
}
}
配置类：
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.oxm.jaxb.Jaxb2Marshaller;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
@Configuration
public class EcClientConfiguration extends WebMvcConfigurerAdapter {
@Value("${db.path}")
private String dbPath;
@Value("${defaultUri}")
private String defaultUri;
@Value("${spring.datasource.url}")
private String dataSourceUrl;
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("org.h2.Driver");
dataSource.setUrl(dataSourceUrl);
dataSource.setUsername("test");
return dataSource;
}
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
@Bean
public InternalResourceViewResolver viewResolver() {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("WEB-INF/jsps/");
resolver.setSuffix(".jsp");
return resolver;
}
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
/**
* Resolves property values in the properties file with @Value ${} annotation.
*
* @return a new {@link PropertySourcesPlaceholderConfigurer} object for the property.
*/
@Bean
public static PropertySourcesPlaceholderConfigurer propertyConfigInDev() {
return new PropertySourcesPlaceholderConfigurer();
}
}