Javaweb框架 SpringMVC_springmvc 找不到 cpt页面-优快云博客

本文链接：https://blog.youkuaiyun.com/CptOctopus/article/details/108011870

Javaweb框架 SpringMVC

MVC设计模型：
M model模型，Javabean
V View视图，JSP
C Controller控制器，Servlet
入门案例：
需求：
在这里插入图片描述
控制器类

//控制器类
@Controller
public class HelloController {
    @RequestMapping(path="/hello")
    public String sayhello(){
        System.out.println("hello spring mvc");
        return "success";
    }
}

SpringMVC.xml 配置视图解析器和 SpringMVC注解支持

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
    http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
    <context:component-scan base-package="controller"></context:component-scan>
    <!--配置视图解析器,告诉HelloController类中的"success"如何跳转-->
    <bean id ="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--开启springmvc注解支持，即开启 -->
    <mvc:annotation-driven/>
</beans>

web.xml 配置DispatcherServlet控制器

<!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>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <!--设置servlet拦截所有请求-->
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

在这里插入图片描述
SpringMVC

@RequestMapping(path="/hello")注解：用于建立请求URL和处理请求方法之间的对应关系，可以写在类前或方法前

请求参数绑定(将表单数据封装到服务器本地对象)：
表单jsp页面：表单name属性的值需要和本地Account类的属性名称相同

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <%--请求参数绑定--%>
    <%--<a href="param/testParam" >请求参数绑定</a>--%>
    <form action="/param/saveAccount" method="post">
        姓名：<input type="text" name="username"/>
        密码：<input type="text" name="password"/>
        金额：<input type="text" name="money"/>
        <input type="submit" value="提交"/>

    </form>
</body>
</html>

控制器类：只需要把Account account作为saveAccount函数的输入

package controller;

import domain.Account;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/param")
public class ParamController {
    @RequestMapping("/saveAccount")
    public String saveAccount(Account account){
        System.out.println("执行了...");
        System.out.println(account);
        return "success";
    }
}