Intellij Idea 建Maven新项目

最新推荐文章于 2025-03-07 15:31:47 发布

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最新推荐文章于 2025-03-07 15:31:47 发布

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分类专栏： springMVC 文章标签： intellij idea maven

本文链接：https://blog.youkuaiyun.com/saizzzzzz/article/details/53169388

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每次建新项目的时候,细节总会忘,还是需要去网上找,不如自己记录一下,方便以后查阅.

1.新建项目

file->new ->Project
选择项目类型
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下面内容是用来唯一标识你的项目,只要不与其他项目冲突即可
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下面就是maven的默认配置,额外引入了archetypeCatelog=internal,(看网上说//archetypeCatalog表示插件使用的archetype元数据，不加这个参数时默认为remote，local，即中央仓库archetype元数据，由于中央仓库的archetype太多了，所以导致很慢，指定internal来表示仅使用内部元数据。)
这里写图片描述

命名项目名
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这时候项目文件夹就建好了,选择右边红框的Enable-Auto- Import，可以在每次修改pom.xml后，自动的下载并导入jar包
这里写图片描述

此时的项目目录结构还不是标准的maven结构,File -> Project Structure ,新建缺少的文件夹,mark as对应的类型,然后保存就可以了.
这里写图片描述

2.文件配置

2.1 pom.xml

新建项目的时候,系统默认导入了junit的jar包,我们依葫芦画瓢,把自己需要的jar包引入pom.xml就可以了

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.xxx</groupId>
  <artifactId>demo</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>demo Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <properties>
    <spring.version>4.2.6.RELEASE</spring.version>
    <spring-security.version>4.0.3.RELEASE</spring-security.version>
  </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <!-- logger -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>jcl-over-slf4j</artifactId>
      <version>1.5.8</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.5.8</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.5.8</version>
    </dependency>
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.14</version>
    </dependency>
    <!-- ./logger -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
      <exclusions>
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

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

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

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

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-oxm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- Uses Castor for XML -->
    <dependency>
      <groupId>org.codehaus.castor</groupId>
      <artifactId>castor</artifactId>
      <version>1.2</version>
    </dependency>
    <!-- Castor need this -->
    <dependency>
      <groupId>xerces</groupId>
      <artifactId>xercesImpl</artifactId>
      <version>2.8.1</version>
    </dependency>
    <!-- jackson -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.4.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.4.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.4.0</version>
    </dependency>
    <!-- ./jackson -->



  </dependencies>
  <build>
    <finalName>demo</finalName>
  </build>
</project>

2.2 web.xml

工具默认生成的web.xml头和需要的差别比较大,需要修改

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <display-name>Archetype Created Web Application</display-name>

  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/applicationContext*.xml</param-value>
  </context-param>

  <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/root-context.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
    <async-supported>true</async-supported>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>  <!--404的时候试试改这个 /* -> / -->
  </servlet-mapping>
  <!--设置编码 -->
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <async-supported>true</async-supported>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>

  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- Log4j配置 -->
  <context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>/WEB-INF/log4j.properties</param-value>
  </context-param>
  <!--加载log4j配置文件-->
  <listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
  </listener>

  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
</web-app>

2.3 dispatcher-servlet.xml

这里设置转发规则.由于之前在web.xml里配置的dispatcher的url-pattern写成/*,结果一直报映射找不到.最后我直接写了这个json和jsp都支持的ViewResolver

<?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">

    <context:component-scan base-package="com.xxx.controller" />
    <mvc:annotation-driven />


    <bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
        <property name="mediaTypes">
            <map>
                <entry key="json" value="application/json" />
                <entry key="xml" value="application/xml" />
                <entry key="rss" value="application/rss+xml" />
            </map>
        </property>
        <property name="defaultContentType" value="text/html"/>
    </bean>
    <!-- json -->
    <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
        <property name="contentNegotiationManager" ref="contentNegotiationManager"/>
        <property name="viewResolvers">
            <list>
                <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
                <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

                    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
                    <property name="prefix" value="WEB-INF/views/"/>
                    <property name="suffix" value=".jsp"/>
                </bean>

            </list>
        </property>
        <property name="defaultViews">
            <list>
                <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView"/>
                <!-- JAXB XML View -->
                <bean class="org.springframework.web.servlet.view.xml.MarshallingView">
                    <constructor-arg>
                        <bean id="castorMarshaller" class="org.springframework.oxm.castor.CastorMarshaller"/>
                    </constructor-arg>
                </bean>
            </list>
        </property>
    </bean>
    <!-- ./json -->

</beans>

写上controller代码就可以访问了

@RestController
public class HiController
{
    static Logger logger = LoggerFactory.getLogger(HiController.class);
    @RequestMapping("hi")
    public String hi()
    {
        logger.info("hi");
        return "hi";
    }
}

@Controller
public class MainController
{
    static Logger logger = LoggerFactory.getLogger(MainController.class);
    @RequestMapping(value = "/index")
    public String index()
    {
        logger.info("index");
        return "index";
    }

    @RequestMapping("main")
    public ModelAndView main()
    {
        logger.info("main");
        ModelAndView mv = new ModelAndView();
        mv.setViewName("main");
        mv.addObject("msg","this is msg");
        return mv;
    }
}

jsp页面放在InternalResourceViewResolver里配置的路径下
这里写图片描述

3.配置tomcat

Run->Edit Configuration
这里写图片描述

点击Server,配置Application server,如果没有可选的tomcat,通过Configure选择tomcat文件夹进行配置.
配置好tomcat后点击Deployment
这里写图片描述
选择了发布文件后也可以通过Application context来指定访问的项目名,默认情况下直接访问根目录.

启动程序,然后就可以访问了

这里写图片描述

后记

写在最后,其实新建项目以后好多次了,每次还是感觉有点陌生,看着以前项目配置文件的密密麻麻的内容,也很少有耐心能看下去.很多之前遇到的问题,再次遇到还是忘了如何解决.细细想来还是只是知其然,对于深层次的原理还是不了解.所以每次都是两眼一摸瞎,没有解决的思路,只能google别人的日志.尤其是
WARN org.springframework.web.servlet.PageNotFound:1139 - No mapping found for HTTP request with URI [/demo/index] in DispatcherServlet with name 'dispatcher'
当项目还是内容空空的时候,报这种错,真是让人感到无从下手,知道是配置有问题,却看不出问题,一阵折腾后把/*改成/才能访问.但是之前的项目写/* 也是可以的,这里的细节原因,以后有空在看看吧.