Question

我已经开始使用Spring MVC和Spring Boot创建一个hello World Web应用程序的教程。我无法让应用程序启动hello.jsp。

这是我的项目配置：

申请类：

@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>

网络结果：

获取sayHello方法的返回值而不是model.addAttribute（“greeting”，“Hello World！”）。即使我删除了hello.jsp文件，我仍然得到相同的结果。

任何想法为什么不读这个文件？是不正确的？

非常感谢!!!

Answer 1

您正在使用RestController响应返回类型，即“Hello！”...因此您可以使用@Controller而不是@RestController。

Answer 2

我认为项目的web.xml文件存在问题。使用.html时servlet文件的映射无效，因此项目的sevlet配置代码将是

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>

Answer 3

例如............................................

https://github.com/spring-projects/spring-boot/tree/master/spring-boot-samples/spring-boot-sample-web-jsp

Answer 4

非常感谢你的帮助。解决方案是我缺少2个概念springboot和tomcat。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建议的那样）。

另外，我忘记了pom中的以下依赖：

 <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-thymeleaf</artifactId>
  <version>${spring.boot.version}</version>
</dependency>

项目：

应用：

＆＃13;

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);
    }
}

＆＃13;

控制器：

＆＃13;

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";
    }
}

＆＃13;

hello.html的：

＆＃13;

<!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>

＆＃13;

使用Spring Boot的Spring MVC WebApp不会启动“* .jsp”文件

4 个答案: