org.springframework.web.servlet.DispatcherServlet noHandlerFound WARNING: No mapping found for HTTP request with URI in DispatcherServlet with name

Question

我创建了一个非常基本的 maven 项目，它实现了 spring Web MVC。

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app> 
    <display-name>Archetype Created Web Application</display-name>
    <servlet>
        <servlet-name>first</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>first</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

第一个servlet.xml

<?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:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd
    ">
    <context:annotation-config />

    <context:component-scan base-package="com.som.controller" />
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

HelloController.java

package com.som.controller;


import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class HelloController {

    //business logic
    
    @RequestMapping(value="/hello")
    public ModelAndView hello() {
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("hello");
        
        return modelAndView;
    }
    
}

它给出了以下错误

org.springframework.web.servlet.DispatcherServlet noHandlerFound
WARNING: No mapping found for HTTP request with URI [/SpringWebMVC/hello] in DispatcherServlet with name 'first'

我也试过添加

<mvc:annotation-driven/> 

在第一个 servlet.xml 中。 我尝试过的另一件事是将我的 controller class 注释为

@RequestMapping("/")

到目前为止没有任何效果。

有人可以帮忙吗？

Answer 1

代码没有问题，我尝试了许多版本的 springframework 和 5.0.2.RELEASE 为我工作。