Question

在我的带有Spring MVC框架的动态Web项目中，$ {}没有在jsp页面中显示变量值。

请在下面找到代码：

的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>SpringMVCTest</display-name>
  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>

   <servlet>

    <servlet-name>dispatcher</servlet-name>

    <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>

调度员的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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    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">


    <context:component-scan base-package="com.springtutorial.basecontroller" />


    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix">
            <value>/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
        </bean>

</beans>

BaseController.java 控制器类

package com.springtutorial.basecontroller;

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


@Controller

public class BaseController {

    @RequestMapping(value="/", method=RequestMethod.GET)
    public ModelAndView printHello(){
        return new ModelAndView("index", "message", "Hi"); 
    }

}

index.jsp 它是唯一的jsp页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Spring MVC Framework</title>
</head>
<body>
<h1>learning</h1>
    <h2>${message}</h2>
</body>
</html>

我是Spring MVC框架的新手，刚开始学习它。我刚刚在互联网上查看代码，它几乎相似，但仍然没有运气。

如果我错过了什么，请告诉我。

由于

Answer 1

我在BaseController.java文件和dispatcher-servlet.xml文件中进行了更改：

<强> BaseController.java

package com.springtutorial.basecontroller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
//import org.springframework.web.bind.annotation.RequestMethod;
//import org.springframework.web.servlet.ModelAndView;


@Controller

public class BaseController {

    @RequestMapping("/")
    public String index(Model model){
        model.addAttribute("message", "Hi");
        return "index";
    }
}

<强>调度-servlet.xml中

<?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:context="http://www.springframework.org/schema/context"
    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">


    <context:component-scan base-package="com.springtutorial.basecontroller" />


    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix">
            <value>/WEB-INF/jsp/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
        </bean>

</beans>

请试试这个。这对我有用

$ {}没有在jsp spring项目中工作

1 个答案: