前言
把我idea的模板拿出来,希望能够帮到大家初学者,从myeclipse迁移到idea是以把心酸泪,我把以前的demo拿出来。
- 创建maven项目,切记别选错
- 到这项的时候,如果创建maven项目不全的话,一定要加上最后的archetypeCatalog=internal.
- 这样项目就创建好,下面添加tomcat,配置的话就不多说了。记住将项目添加进去,还有路径配置(这个配置资料比较多)
添加tomcat
- 紧接着先创建对应文件夹,使其目录大致与相似一致(大文件夹一致)创建完文件夹要声明作用。
- 创建完文件夹声明各个文件夹的属性以及用途(和myeclipse有点不一样,因为myeclipse帮你自动配置好了,idea需要自己配置一下)。
结果这样就行:
- 接着开始配置maven环境。里面包含几乎初学者的所有jar包。ssm的初始配置应该是够的,我刚开始找maven完整版也找了很久,自己也凑了一点。我的maven配置为:(项目名改成自己的)
<?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>food</groupId>
<artifactId>food</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>food Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<!--<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>-->
<!--</properties>-->
<!--<dependencies>-->
<!--<dependency>-->
<!--<groupId>junit</groupId>-->
<!--<artifactId>junit</artifactId>-->
<!--<version>4.11</version>-->
<!--<scope>test</scope>-->
<!--</dependency>-->
<!--</dependencies>-->
<properties>
<!-- java ee jar包 -->
<javaee.version>7.0</javaee.version>
<!-- jstl jar包 -->
<jstl.version>1.2</jstl.version>
<!-- mysql-connector包 -->
<mysql.version>5.1.46</mysql.version>
<!-- commons-dbcp -->
<dbcp.version>1.4</dbcp.version>
<!-- mybatis-spring整合包 -->
<mybatis-spring.version>1.3.0</mybatis-spring.version>
<!-- spring版本号 -->
<spring.version>5.1.5.RELEASE</spring.version>
<!-- mybatis版本号 -->
<mybatis.version>3.4.0</mybatis.version>
<!-- jackson版本号 -->
<jackson.verson>2.9.8</jackson.verson>
<!-- junit -->
<junit-version>4.12</junit-version>
<!-- cglib -->
<cglib-version>3.2.2</cglib-version>
<!-- log4j日志文件管理包版本 -->
<slf4j.version>1.7.21</slf4j.version>
<log4j.version>1.2.17</log4j.version>
</properties>
<dependencies>
<!-- 导入java ee jar 包 -->
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>${javaee.version}</version>
</dependency>
<!-- jstl包 -->
<!-- JSTL标签类 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<!-- 导入Mysql数据库链接jar包 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- dbcp数据库连接池包 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>${dbcp.version}</version>
</dependency>
<!--mybatis-spring整合包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis-spring.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.7</version>
</dependency>
<!-- mybatis-核心包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--spring-核心包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</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-oxm</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-jdbc</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-aop</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-context-supportmvn </artifactId>-->
<!--<version>${spring.version}</version>-->
<!--</dependency>-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- jackson包 -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.verson}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.verson}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.verson}</version>
</dependency>
<!-- 测试包 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit-version}</version>
<scope>test</scope>
</dependency>
<!-- cglib包 -->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>${cglib-version}</version>
</dependency>
<!--日志记录的jar包 -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- aspectjweaver包 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.10</version>
</dependency>
<!-- aspectjrt 包-->
<dependency>
<groupId>aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.5.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
<!--<dependency>-->
<!--<groupId>org.mybatis.generator</groupId>-->
<!--<artifactId>mybatis-generator-core</artifactId>-->
<!--<version>1.3.6</version>-->
<!--</dependency>-->
</dependencies>
<build>
<finalName>food</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.0.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.20.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
- 紧接着web.xml配置,我第一个过滤器可以删除掉,里面一些名称根据自己项目名修改,但是对应关系要一致
<filter>
<filter-name>cors2</filter-name>
<filter-class> com.date.fitter.filter</filter-class>
</filter>
<filter-mapping>
<filter-name> cors2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:applicationContext.xml</param-value>
</context-param>
<servlet>
<servlet-name>springMvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:food-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<multipart-config>
<!-- <location>/</location> -->
<max-file-size>20971520</max-file-size> <!--单个文件最大大小:5MB-->
<max-request-size>20971520</max-request-size> <!--所有文件最大大小:20MB-->
<file-size-threshold>0</file-size-threshold> <!-- 超过这个大小直接存硬盘,而不是内存 -->
</multipart-config>
</servlet>
<servlet-mapping>
<servlet-name>springMvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<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>
</web-app>
- 接着在resource目录下的xml配置如下:
- application.xml spring核心配置
<?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:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<!-- 1. 数据源 : DriverManagerDataSource -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost/food?useSSL=false"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</bean>
<!--
2. mybatis的SqlSession的工厂: SqlSessionFactoryBean dataSource:引用数据源
MyBatis定义数据源,同意加载配置
-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:mybatis-conf.xml"/>
<property name="mapperLocations" value="classpath:mapping/*.xml"></property>
</bean>
<!--
3. mybatis自动扫描加载Sql映射文件/接口 : MapperScannerConfigurer sqlSessionFactory
basePackage:指定sql映射文件/接口所在的包(自动扫描)
-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.food.dao"></property>
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>
<!-- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> -->
<!-- 注入sqlSessionFactory -->
<!-- <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> -->
<!-- 给出需要扫描Dao接口包 -->
<!-- <property name="basePackage" value="com.ssm.dao" /> -->
<!-- </bean> -->
<!--
4. 事务管理 : DataSourceTransactionManager dataSource:引用上面定义的数据源
-->
<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 5. 使用声明式事务
transaction-manager:引用上面定义的事务管理器
-->
<tx:annotation-driven transaction-manager="txManager"/>
</beans>
- food-servlet.xml配置 springmvc的配置,名称具体参考自己的,包括映射jsp等等
<?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-3.0.xsd">
<!-- 配置SpringMVC -->
<!-- 1.开启SpringMVC注解模式 -->
<!-- 简化配置:
(1)自动注册DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter
(2)提供一些列:数据绑定,数字和日期的format @NumberFormat, @DateTimeFormat, xml,json默认读写支持
-->
<mvc:annotation-driven/>
<!-- 2.静态资源默认servlet配置
(1)加入对静态资源的处理:js,gif,png
(2)允许使用"/"做整体映射
-->
<mvc:default-servlet-handler/>
<!-- 3.配置jsp 显示ViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!-- 4.扫描web相关的bean -->
<context:component-scan base-package="com.food.controller"/>
</beans>
- mybatis-conf.xml配置: mybatis一些额外配置,但是我用的不太多
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 实体类,简称 -设置别名 -->
<!--<typeAliases>-->
<!--<typeAlias alias="sheng" type="com.date.bean.sheng" />-->
<!--</typeAliases>-->
<!-- 实体接口映射资源 -->
<!--
说明:如果xxMapper.xml配置文件放在和xxMapper.java统一目录下,mappers也可以省略,因为org.mybatis.spring.mapper.MapperFactoryBean默认会去查找与xxMapper.java相同目录和名称的xxMapper.xml
-->
<!-- <mappers> -->
<!-- <mapper resource="com/ssm/dao/citylistMapper.xml" /> -->
<!-- <mapper resource="com/ssm/dao/foodMapper.xml" /> -->
<!-- </mappers> -->
</configuration>
- 还剩log4j.properties:这是输出日志的配置
# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
上面就是基本的配置,下面我把我简单的结合的demo展示出来控制层controller,控制器是springmvc的主要部分,里面主要关于url请求地址的配置,以及处理。和servlet很像。它是网站和服务器通信的枢纽。
- controller:
- dao层叫数据访问层。其实就是声明一个接口,这个接口有很多方法集合,关于数据的增删该查,返回的类型可以为自定义map,list,或者bean对象等等。
dao层为:
- mapper,mapper就是dao的方法具体实现,在xml中写sql,这是mybatis部分。在myeclipse中我的dao和mapper是放到一块的,但是idea的maven编译方式和myeclipse不同,如果写在一块需要配置,可以直接在resources中新建mapping文件夹放到里面。这样就能够被编译
- bean层,至于bean层就不多说了,就是对象,要和数据库对象的字段一一对应。如果不一致则需要自定义返回类型在其中配置。
另外,还有一些遇到过的小问题,比如没有找打监听器报错,
还有就是一些jar包版本可能会冲突,比如我之前用的mysql就出错了。后来换了版本。注意要在dependece中先将jar包移除,然后maven clean jar包,不然可能会出错。还有就是刚开始配置可能有的xml或者class没找到,可以在target文件下查看classes那些东西已经编译
剩下的如果以后遇到会补充,上面有些文件名可能写blog时候会打错,各位具体名称还请对照自己的名称。另外,如果有错误还请大神指出。
项目完整github地址(有些变化)
javasmall/javaEEprojectgithub.com
作者:Big sai