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Spring MVC 简单的hello world的实现

2020年03月09日 | 移动技术网IT编程 | 我要评论

一、项目搭建

1、可以在新建项目的使用spring mvc框架。或者创建一个简单的项目之后再用add framework support来添加spring mvc框架。

2、删除自动生成的lib的jar包，使用pom文件来进行管理包。目录结构如下图。

3、pom文件。加载完成之后才能进行下一步。

<?xml version="1.0" encoding="utf-8"?>
<project xmlns="http://maven.apache.org/pom/4.0.0" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
   xsi:schemalocation="http://maven.apache.org/pom/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelversion>4.0.0</modelversion>
 
 <groupid>com.zxj</groupid>
 <artifactid>zxj-spring-mvc</artifactid>
 <version>1.0-snapshot</version>
 
 <name>zxj-spring-mvc</name>
 <url>http://www.example.com</url>
 <packaging>war</packaging>
 
 <properties>
  <project.build.sourceencoding>utf-8</project.build.sourceencoding>
  <maven.compiler.source>1.7</maven.compiler.source>
  <maven.compiler.target>1.7</maven.compiler.target>
  <spring.version>4.3.18.release</spring.version>
 </properties>
 
 <dependencies>
  <!--测试-->
  <dependency>
   <groupid>junit</groupid>
   <artifactid>junit</artifactid>
   <version>4.12</version>
   <scope>test</scope>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-test</artifactid>
   <version>${spring.version}</version>
   <scope>test</scope>
  </dependency>
 
  <!--spring-->
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-context</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-aop</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-aspects</artifactid>
   <version>${spring.version}</version>
  </dependency>
 
  <!--spring mvc-->
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-web</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-webmvc</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>javax.servlet.jsp.jstl</groupid>
   <artifactid>jstl-api</artifactid>
   <version>1.2</version>
  </dependency>
 </dependencies>
 
 <build>
  <finalname>${project.artifactid}</finalname>
  <plugins>
   <plugin>
    <artifactid>maven-clean-plugin</artifactid>
    <version>3.1.0</version>
   </plugin>
   <plugin>
    <artifactid>maven-install-plugin</artifactid>
    <version>2.5.2</version>
   </plugin>
  </plugins>
 </build>
</project>

4、project structure的编辑，创建一下包名。

二、webapp的编辑

1、目录结构。

2、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_4_0.xsd"
   version="4.0">
 
 <!--welcome pages-->
 <welcome-file-list>
  <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>
 
 <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>
 <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/dispatcher-servlet.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>dispatcher</servlet-name>
  <url-pattern>/</url-pattern>
 </servlet-mapping>
</web-app>

3、applicationcontent.xml。

<?xml version="1.0" encoding="utf-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  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/context
   http://www.springframework.org/schema/context/spring-context.xsd">
 
 <context:component-scan base-package="com.xiaojie.spring.mvc"/>
</beans>

4、dispatcher-servlet.xml。

<?xml version="1.0" encoding="utf-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:mvc="http://www.springframework.org/schema/mvc"
  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/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">
 
 <context:component-scan base-package="com.xiaojie.spring.mvc"/>
 <context:annotation-config/>
 
 <!-- 配置注解驱动 可以将request参数与绑定到controller参数上 -->
 <mvc:annotation-driven/>
 <!--这句要加上，要不然可能会访问不到静态资源-->
 <mvc:default-servlet-handler />
 <!--静态资源映射如下-->
 <mvc:resources mapping="/css/**" location="/statics/css/"/>
 <mvc:resources mapping="/js/**" location="/statics/js/"/>
 <mvc:resources mapping="/image/**" location="/statics/images/"/>
 <bean class="org.springframework.web.servlet.view.internalresourceviewresolver">
  <property name="prefix" value="/views/"/>
  <property name="suffix" value=".jsp"/>
 </bean>
</beans>

5、index.jsp默认页面。

<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<html>
<head>
 <title>hello world</title>
</head>
<body>
welcome zhuoxiaojie spring mvc
</body>
</html>

6、hello.jsp。

<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<html>
<head>
 <title>test</title>
</head>
<body>
hello world
</body>
</html>

7、test2.jsp。

<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<html>
<head>
 <title>test</title>
</head>
<body>
key1: ${key1} , key2: ${key2}
</body>
</html>

三、controller层

package com.xiaojie.spring.mvc.controller;
 
import org.springframework.stereotype.controller;
import org.springframework.ui.model;
import org.springframework.web.bind.annotation.getmapping;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.servlet.modelandview;
 
@controller
@requestmapping("/test")
public class testcontroller {
 
 @requestmapping("/hello")
 public modelandview test1(model model) {
  return new modelandview("hello");
 }
 
 @getmapping("/test2")
 public modelandview test2(model model) {
  model.addattribute("key1", "卓小杰");
  model.addattribute("key2", "你真帅");
  return new modelandview("test2");
 }
}

四、tomcat的配置

1、下载tomcat8。自己去百度教程下载。