[英]Spring MVC WebApp using Spring Boot does not launch “*.jsp” file
我已经开始使用Spring MVC和Spring Boot创建一个创建Hello World Web应用程序的教程。 我无法使该应用程序启动hello.jsp。
这是我的项目配置:
应用类别:
@Configuration
@ComponentScan
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
HelloController类:
@RestController
public class HelloController {
@RequestMapping(value="/greeting",method= RequestMethod.GET)
public String sayHello (Model model){
model.addAttribute("greeting","Hello World!");
return "HELLO!";
}
}
servlet-config.xml文件:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <mvc:annotation-driven/> <context:component-scan base-package="trex.controller"/> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> <!-- ... --> </beans>
web.xml文件:
<?xml version="1.0" encoding="ISO-8859-1"?> <!-- Add Copyright notice here. --> <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <display-name>SpringWebMVCApp</display-name> <servlet> <servlet-name>fitTrackerServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/config/servlet-config.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>fitTrackerServlet</servlet-name> <url-pattern>*.html</url-pattern> </servlet-mapping> </web-app>
hello.jps文件:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Insert title here</title> </head> <body> <h1>${greeting}</h1> </body> </html>
网页结果:
正在获取sayHello方法的返回值,而不是model.addAttribute(“ greeting”,“ Hello World!”)。 即使删除hello.jsp文件,我仍然会得到相同的结果。
任何想法为什么不读取此文件? 不对吗
非常感谢!!!
您正在使用RestController
,其响应返回的类型为“ Hello!” ...,因此可以使用@Controller
而不是@RestController
。
我认为您的项目的web.xml文件中存在问题。 Servlet文件的映射在使用.html的地方无效,因此用于项目的sevlet配置的代码将是
web.xml文件:
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<display-name>SpringWebMVCApp</display-name>
<servlet>
<servlet-name>fitTrackerServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/servlet-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>fitTrackerServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
例如............................................
非常感谢大家的帮助。 解决的办法是我缺少了springboot和tomcat两个概念。 因为我使用的是SpringBoot,所以我既不需要webapp文件夹也不需要.xml文件(如@ redflar3建议)。
另外,我忘记了pom中的以下依赖关系:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
<version>${spring.boot.version}</version>
</dependency>
项目:
应用:
package trex.controller; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; @SpringBootApplication(exclude={DataSourceAutoConfiguration.class}) public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
控制器:
package trex.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class HelloController { @RequestMapping("/greeting") public String sayHello (Model model){ model.addAttribute("greeting","Hello World!"); return "hello"; } }
hello.html:
<!DOCTYPE HTML> <html xmlns:th="http://www.thymeleaf.org"> <head> <title>Getting Started: Serving Web Content</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> </head> <body> <p th:text="${greeting}" /> </body> </html>
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