Java筆記Spring（一）

1、Spring框架

源碼地址：https://github.com/spring-projects/spring-framework

構建工具：Gradle，Gradle教程：https://www.w3cschool.cn/gradle/

Gradle基於Groovy語言，Groovy教程：https://www.w3cschool.cn/groovy/

JSR標準相關的資料： https://jcp.org/en/jsr/all

 

2、Spring框架Module

官網文檔：https://docs.spring.io/spring/docs/4.3.17.RELEASE/spring-framework-reference/htmlsingle/#overview-modules

3、使用Maven構建demo-springmvc項目

File -> New Project -> Maven（勾選Create from archetype，同時選擇maven-archetype-webapp） -> Next 

GroupId：com.example

ArtifactId：demo-spring

-> Next -> Next -> 
Project name：demo-spring

-> Finish

 

對比上面兩圖，發現不一樣點只在於有沒有web結構，並且默認的web結構仍是須要修改的。 繼續...

 

添加spring mvc框架支持，直接在pom.xml文件中dependencies下添加spring mvc的依賴

<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.17.RELEASE</version>
</dependency>

 

替換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>
  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

 

WEB-INF下添加applicationContext.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

</beans>

 

dispatcher-servlet.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"
       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">

    <!--spring基本註解支持 -->
    <context:annotation-config/>

    <!--mvc註解支持-->
    <mvc:annotation-driven/>

    <!--靜態資源映射-->
    <mvc:resources mapping="/css/**" location="/WEB-INF/statics/css/"/>
    <mvc:resources mapping="/js/**" location="/WEB-INF/statics/js/"/>
    <mvc:resources mapping="/image/**" location="/WEB-INF/statics/image/"/>

    <!--jsp模板視圖支持-->
    <bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/view/"/>
        <property name="suffix" value=".jsp"/>
        <property name="exposeContextBeansAsAttributes" value="true"/>
    </bean>

    <!--自動掃描裝配-->
    <context:component-scan base-package="com.example.demo"/>
</beans>

 

寫個Controller跑起來看看

在 src -> main 下建兩個文件夾，java和test，建立完成後，分別設置資源類型

 

java文件夾設置爲 sources，test文件夾設置爲 tests

 

建立一個測試controller

 

配置測試服務器

 

 點擊啓動，訪問 localhost:8080/user/get

會顯示 ?? 

緣由：spring mvc默認輸出字符集 iso-8859-1，須要將輸出字符集調整爲 utf-8

 

再次啓動，訪問  localhost:8080/user/get，顯示正常。