我正在尝试使用 Spring MVC 和 Hibernate 构建一个用于教育目的的示例。
我使用 IntelliJ、Maven 和 Tomcat7。我正在尝试做一个简单的请求映射，因此当 localhost:8080 加载时它将显示 hello.jsp (一个简单的你好 - 没什么特别的)。
但是我收到 404 错误。我在 IntelliJ 中配置了 Tomcat7 并设置应用程序上下文 / 和我的 Web 文件夹在服务器启动时部署
我以这种方式组织我的文件:
pom.xml
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>WebAgg</groupId>
<artifactId>webagg</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!-- Spring MVC support -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>javax.servlet.jsp.jstl-api</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>org.apache.taglibs</groupId>
<artifactId>taglibs-standard-spec</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.0.6.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.0.6.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.common</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>5.0.1.Final</version>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.13</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.13</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4-1206-jdbc42</version>
</dependency>
</dependencies>
</project>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app
version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>Spring Hibernate JPA Hello World Application</display-name>
<!-- Configuration file for the root application context -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-servlet.xml
</param-value>
</context-param>
<!-- Configuration for the DispatcherServlet -->
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
spring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- It register the beans in context and scan the annotations inside beans and activate them -->
<context:component-scan base-package="com.aggric"/>
<!-- This allow for dispatching requests to Controllers -->
<mvc:annotation-driven />
<!-- This helps in mapping the logical view names to directly view files under a certain pre-configured directory -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- This resolves messages from resource bundles for different locales -->
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="messages" />
</bean>
<!-- This produces a container-managed EntityManagerFactory;
rather than application-managed EntityManagerFactory as in case of LocalEntityManagerFactoryBean-->
<bean id="entityManagerFactoryBean" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- This makes /META-INF/persistence.xml is no longer necessary -->
<property name="packagesToScan" value="com.aggric.model" />
<!-- JpaVendorAdapter implementation for Hibernate EntityManager.
Exposes Hibernate's persistence provider and EntityManager extension interface -->
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">validate</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
</props>
</property>
</bean>
<!-- Simple implementation of the standard JDBC DataSource interface,
configuring the plain old JDBC DriverManager via bean properties -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.postgresql.Driver" />
<property name="url" value="jdbc:postgresql://147.27.60.195:5432/Aggric_postgres" />
<property name="username" value="postgres" />
<property name="password" value="postgres" />
</bean>
<!-- This transaction manager is appropriate for applications that use a single JPA EntityManagerFactory for transactional data access.
JTA (usually through JtaTransactionManager) is necessary for accessing multiple transactional resources within the same transaction. -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactoryBean" />
</bean>
<!-- responsible for registering the necessary Spring components that power annotation-driven transaction management;
such as when @Transactional methods are invoked -->
<tx:annotation-driven />
</beans>
索引 Controller
package com.aggric.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping(value="/")
public class IndexController {
@RequestMapping(method = RequestMethod.GET)
public String SayHello(){
return "hello";
}
}
对我缺少的东西有什么建议吗？
最佳答案
在 Tomcat 上，应用程序部署到
hostname:port/application-name
仅仅因为您将 URL 模式设置为 /，它就不会将其部署为根应用程序。为此，您需要创建一个 ROOT.war 并部署它。
但我不建议这样做。如果您想要一个更简单的 URL 供外部访问，请使用反向代理，而不是滥用 Tomcat。
关于java - 将Web项目部署到Tomcat7后出现404错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34423876/