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。
1. 创建maven项目,切记别选错
2.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.
3.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
4.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。
5.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:
6.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>
7. 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>
8. 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。
1. controller:
2.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:
3.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
4.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。