SpringMVC学习笔记
第一部分 HelloWorld
文件结构
文件结构图.png
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--配置DispatcherServlet-->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置配置DispatcherServlet的一个初始化参数：配置SpringMVC配置文件的位置和名称 -->
<!--
实际上也可以不通过contextConfigLocation来配置SpringMVC的配置文件，而使用默认的，
默认的配置文件为：/WEB-INF/<servlet-name>-servlet.xml
-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
index.jsp
<%--
Created by IntelliJ IDEA.
User: lenovo
Date: 2019/4/22
Time: 15:15
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<a href="helloworld">helloworld</a><br>
<a href="/springmvc/testRequestMapping">Test RequestMapping</a>
</body>
</html>
success.jsp
<%--
Created by IntelliJ IDEA.
User: lenovo
Date: 2019/4/22
Time: 15:40
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>success</title>
</head>
<body>
<h1>Hello SpringMVC</h1>
</body>
</html>
HelloWorld.java
package com.wss.hellomvc;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class Helloworld {
@RequestMapping("/helloworld")
public String hello() {
System.out.println("helloworld");
return "success";
}
}
SpringMVCTest.java
package com.wss.hellomvc;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@RequestMapping("springmvc")
@Controller
public class SpringMVCTest {
public static final String SUCCESS = "success";
@RequestMapping("/testRequestMapping")
public String testRequestMapping() {
System.out.println("testRequest");
return SUCCESS;
}
}
springmvc.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: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">
<!-- 配置自动扫描的包 -->
<context:component-scan base-package="com.wss.hellomvc"></context:component-scan>
<!-- 配置视图解析器：如何把handle方法返回值解析为实际的物理视图-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
至此，SpringMVC的HelloWorld就已经完成了，具体怎么运行，请先百度一下（实际上配置了tomcat就基本上没什么大问题）。这里有一个小问题的解决方法，读者可以参考一下
一种错误的排查方案.png
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