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IDEA使用maven+tomcat+spring

IDEA使用maven+tomcat+spring

作者: 煎包小混沌 | 来源:发表于2018-12-26 19:22 被阅读0次
1:创建一个maven的web项目参照上一篇文章
2:使用maven,在pom.xml中导入Spring框架,下面部分框架实际没有用到
<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>5.0.5.RELEASE</spring.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

    <!-- spring -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- servlet -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>

  </dependencies>
3:修改web.xml文件,在web-app标签中添加
<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>

说明:加载web.xml后会去查找一个<servlet-name>为dispatcher-servlet.xml的文件
image.png
4:手动增加dispatcher-servlet.xml文件
image.png image.png
dispatcher-servlet.xml内容如下:

<?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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"

       xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd
                        http://www.springframework.org/schema/mvc
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

    <!-- 自动扫描@Controller注入为bean -->
    <context:component-scan base-package="com.springmvc.helloworld"/>
    <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

说明:com.springmvc.helloworld是你的包名,此处还没有创建,所以为红色
 <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
这里已经指定jsp的路径和后缀名,在之后的返回中无需制定路径
5:创建java文件,新建一个java文件夹,并修饰为Sources,接着创建包com.springmvc.helloworld和java文件
image.png image.png
注解@Controller:声明HiController类是一个 SpringMVC Controller类
注解@RequestMapping:添加请求url映射地址,此处的url变成:http://localhost:8080/hi/say

6:创建一个say.jsp作为HiController类中say()方法的返回
image.png
7:直接启动tomcat,报错了
image.png
绝大部分的错误都是缺少依赖库,检测pom.xml
这里的错误显示:项目缺少org.springframework.web.servlet.DispatcherServlet
但是我们在maven中已经加入了,此时我们应该想到是否没有引用到项目中,查看Configurations,点击下图中的位置
image.png
将1中的所有库添加到2的位置,如下图
image.png image.png
8:重启tomcat,输入http://localhost:8080/hi/say
image.png

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