Question

我试图将表单中输入的名称大写并显示

控制器：

package yo;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HelloWorldController {

    @RequestMapping("/")
    public String showPage(){
        return "helloworld";
       }

    @RequestMapping("/showForm")
    public String showForm(){
        return"form";
    }
    @RequestMapping("/traitement")
    public String processForm(){
        return"traitement";
    }
    @RequestMapping("/traitementTwo")
    public String caps(HttpServletRequest request,Model model){

        String theName=request.getParameter("s");
        String result="YO "+theName.toUpperCase();
        model.addAttribute("message", result);
        return"helloworld";
    }

}

form.jsp：

<body>
hello   <form action="traitementTwo.jsp" method="GET">

    <input type="text" name="s" placeholder="who are u ?" />

    <input type="submit"/>

    </form>

</body>
</html>

的helloWorld.jsp：

<html>
<body>
    the time on the server is <%= new String("Hello World").toUpperCase() %>
<br>


    The message :${message}

</body>
</html>

spring-mvcdemo-servlet：

<?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/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
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- Step 3: Add support for component scanning -->
    <context:component-scan base-package="yo" />

    <!-- Step 4: Add support for conversion, formatting and validation support -->
    <mvc:annotation-driven/>

    <!-- Step 5: Define Spring MVC view resolver -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/view/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    id="WebApp_ID" version="3.1">

    <display-name>mvc</display-name>

    <!-- Spring MVC Configs -->

    <!-- Step 1: Configure Spring MVC Dispatcher Servlet -->
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring-mvc-demo-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- Step 2: Set up URL mapping for Spring MVC Dispatcher Servlet -->
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

输出：

Etat HTTP 404 - /mvc/traitementTwo.jsp 类型Rapport d''état

消息/mvc/traitementTwo.jsp

描述La ressourcedemandéen''estpas disponible。

Apache Tomcat / 8.0.36

Answer 1

听起来您可能没有正确设置web.xml以创建servlet上下文等。

请参阅以下项目：https://www.mkyong.com/spring-mvc/spring-mvc-and-list-example/

在src-＆gt; main-＆gt; webapp

中具有以下结构

/ - web.xml

/ - mvc-dispatcher-servlet.xml

/ pages（存储jsp页面的目录）

否则请发布您的webapp或spring boot配置以确认您已正确设置。

Answer 2

您已经使用Spring-MVC进行开发，但是您没有Spring MVC配置XML文件。你应该创建一个spring-mvc.xml来配置一些关于spring mvc

的消息

Answer 3

好的，我想我知道问题是什么..在你的form.jsp中：

<form action="traitementTwo.jsp" method="GET">

应该是：

<form action="traitementTwo" method="GET">

Etat HTTP 404 - /mvc/traitementTwo.jsp - spring mvc

3 个答案: