【发布时间】：2018-07-06 08:38:19
【问题描述】：
我已经阅读了大量关于此的问题，但没有一个有帮助。 我正在构建一个非常简单的休息应用程序，但控制器没有响应请求，我收到此错误：
HTTP Status 404 – Not Found
Type Status Report
Message /
Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.
Apache Tomcat/8.5.23
我已将System.out 放入也未显示的控制器中，因此甚至没有调用方法。
我的项目结构是：
Application 类在app 包下。
配置：
@Configuration
@EnableTransactionManagement
public class DatabaseConfig {
@Autowired
private Environment env;
@Bean(name = "dataSource")
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("db.driver"));
dataSource.setUrl(env.getProperty("db.url"));
dataSource.setUsername(env.getProperty("db.username"));
dataSource.setPassword(env.getProperty("db.password"));
return dataSource;
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean entityManagerFactory =
new LocalContainerEntityManagerFactoryBean();
entityManagerFactory.setDataSource(dataSource());
// Classpath scanning of @Component, @Service, etc annotated class
entityManagerFactory.setPackagesToScan(
env.getProperty("entitymanager.packagesToScan"));
// Vendor adapter
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
entityManagerFactory.setJpaVendorAdapter(vendorAdapter);
// Hibernate properties
Properties additionalProperties = new Properties();
additionalProperties.put(
"hibernate.dialect",
env.getProperty("hibernate.dialect"));
additionalProperties.put(
"hibernate.show_sql",
env.getProperty("hibernate.show_sql"));
additionalProperties.put(
"hibernate.hbm2ddl.auto",
env.getProperty("hibernate.hbm2ddl.auto"));
entityManagerFactory.setJpaProperties(additionalProperties);
return entityManagerFactory;
}
@Bean
public JpaTransactionManager transactionManager() {
JpaTransactionManager transactionManager =
new JpaTransactionManager();
transactionManager.setEntityManagerFactory(
entityManagerFactory().getObject());
return transactionManager;
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
}
控制器：
@Controller
public class CharacterController {
@RequestMapping(value="/", method= RequestMethod.GET)
public String start() {
System.out.println("Start");
return "Hello.";
}
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>
<groupId>xxxxxxxxxxx</groupId>
<artifactId>xxxxxxxxxxxxxxx</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>xxxxxxxxxxxxxxxxx</name>
<description>xxxxxxxxxxxxxxxxxxxxxx</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath/> <!-- lookup parent fapp.repositorytory -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</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-test</artifactId>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.0.3.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.0.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.11.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/postgresql/postgresql -->
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4-1206-jdbc42</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
应用：
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
我也尝试使用@SpringBootApplication，将(basePackages ={"app","app.config" etc})，只是app，控制器类...甚至将所有类移动到同一个包，但我现在确信这不是问题。
控制台日志以：
结尾2018-01-27 00:08:08.291 INFO 14596 --- [ main] org.hibernate.tool.hbm2ddl.SchemaUpdate : HHH000228: Running hbm2ddl schema update
2018-01-27 00:08:09.634 INFO 14596 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2018-01-27 00:08:10.584 INFO 14596 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-01-27 00:08:10.632 INFO 14596 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-01-27 00:08:10.637 INFO 14596 --- [ main] app.Application : Started Application in 38.878 seconds (JVM running for 39.335)
所以它看起来应该可以工作......
环境类：
package org.springframework.core.env;
public interface Environment extends PropertyResolver {
String[] getActiveProfiles();
String[] getDefaultProfiles();
boolean acceptsProfiles(String... var1);
}
【问题讨论】：
-
在开始回答您的问题之前，我强烈建议您先阅读一些 Spring 文档：spring.io/guides/gs/rest-service
-
@BenBen 是的，我之前已经阅读了所有内容，但我并没有真正看到我的应用程序中缺少什么...
-
可以发一下
Environment.java的课程内容吗？ -
@DoNhuVy 最后添加。不过，这不是我的课，是从春天开始的
-
需要付出很多努力才能重现您的错误。您不要发布属性文件，不要发布带有导入的 Java 源代码，也不要使用数据库模式，不要仔细格式化源代码。你能把你的源代码发布到 GitHub 上，并给我一个链接吗？我会为你修好。
标签： java spring maven tomcat http-status-code-404