之前一直配不好SSM框架,各种出错,现在整理下来
这个东西不能一味的复制粘贴,一定要搞清楚他们之间的关系才行
首先项目是maven项目
首先配置pom.xml文件
<?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>com.bjpowermode</groupId>
<artifactId>CRM</artifactId>
<version>1.0</version>
<packaging>war</packaging> <!--将项目改为web项目,加上war包-->
<!-- 配置项目版本信息-->
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<spring.version>5.2.8.RELEASE</spring.version>
</properties>
<dependencies>
<!-- 可以很方便的使用三个注解,非必须
@Data
@AllArgsConstructor
@NoArgsConstructor
-->
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.20</version>
<scope>provided</scope>
</dependency>
<!-- 导入与servlet相关的jar,必须-->
<!--servlet-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<!-- 方便在jsp界面中使用,非必须-->
<!--JSTL-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- json一种浏览器传递数据的格式,导入json相关jar方便处理 非必须-->
<!--JSON处理器-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.11.2</version>
</dependency>
<!-- spring框架 必须-->
<!--spring-context-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- spring web环境 必须-->
<!--spring-web-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- spring mvc相关依赖 必须-->
<!--spring-mvc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--jdbc 用于连接数据库 必须-->
<!--spring-jdbc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 以下两个是用于spring的测试环境,非必须(需要测试必须)-->
<!--Spring test-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--junit test-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- 数据库连接池 使用的阿里的 德鲁伊 ,根据情况 非必须-->
<!--connection pool-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.12</version>
</dependency>
<!-- sql驱动 必须-->
<!--mysql driver-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.49</version>
</dependency>
<!-- mybatis与spring容器相关jar 必须-->
<!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.5</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<!-- 用于aop 非必须-->
<!--Spring aop-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>
<build>
<resources>
<!--资源不过滤,需要打包-->
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<!--资源不过滤-->
<filtering>false</filtering>
</resource>
</resources>
<plugins>
<!--JDK插件-->
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
</plugins>
</build>
</project>
接下来创建webapp文件夹,如图
在webapp文件夹下创建web.xml
在这个界面中,注意web.xml文件必须在webapp/WEB-INF/web.xml中
然后在resource文件夹中创建applicationContext.xml文件
这个文件是spring框架的配置文件,配置如下
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
<!--扫描组件,让Spring托管-->
<context:component-scan base-package="com.bjpowernode" />
<!--加载配置-->
<!--
ignore-unresolvable为true时,配置文件${}找不到对应占位符的值,直接赋值'${}'
-->
<context:property-placeholder location="classpath:jdbc.properties" ignore-unresolvable="true"/>
<!--配置数据源druid-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<!--driverClassName可以不写,智能匹配-->
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!--整合MyBatis-->
<!-- 配置 SqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--读取mybatis的主配置-->
<property name="configLocation" value="classpath:mybatis.xml"/>
<!--衔接数据源,目前使用的是数据库连接池-->
<property name="dataSource" ref="dataSource" />
<!--批量起别名,放在beans包中【也就是实体】-->
<property name="typeAliasesPackage" value="com.bjpowernode.beans" />
</bean>
<!-- 配置Spring整合MyBatis,扫描包 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--注册MyBatis的映射文件-->
<property name="basePackage" value="com.bjpowernode.mapper" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
<!--开启@Aspect注解-->
<!--xmlns:aop="http://www.springframework.org/schema/aop"-->
<aop:aspectj-autoproxy/>
</beans>
由于spring和mybatis需要整合在一起,所以spring中除了常规的,还需要配置数据库连接池以及整合mybatis框架
接下来在resource文件夹下创建spring-mvc.xml文件
此文件是spring-mvc的配置文件
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: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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--扫描组件,让Spring托管-->
<context:component-scan base-package="com.bjpowernode.controller" />
<!--如果发现是静态资源的请求,就将该请求转由Web应用服务器默认的Servlet处理-->
<mvc:default-servlet-handler />
<!--视图解析器-->
<!--前缀目录为:/WEB-INF/jsp/-->
<!--后缀扩展名为:.jsp-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<!--启用注解驱动-->
<mvc:annotation-driven />
<!--拦截器配置 可无-->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<mvc:exclude-mapping path="/user/loginView"/>
<mvc:exclude-mapping path="/user/login.do"/>
<mvc:exclude-mapping path="/"/>
<bean class="com.bjpowernode.interceptor.LoginInterceptor"/>
</mvc:interceptor>
</mvc:interceptors>
</beans>
然后在resource文件夹下创建mybatis.xml文件,由于mybatis相关配置已经在applicationContext.xml文件中配置过,只需要额外配置日志即可,十分简单
<?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>
<settings>
<!--设置mybatis输出日志-->
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
</configuration>
可以将程序分离,额外创建jdbc.properties文件配置jdbc信息
#数据库
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/crm?useUnicode=true&characterEncoding=utf-8&autoReconnect=true&useSSL=false&serverTimezone=UTC
jdbc.username=[你的账号]
jdbc.password=[你的密码]
最后一步,配置web.xml文件
<?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_4_0.xsd"
version="4.0">
<!-- 静态资源拦截 必须放在第一位-->
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/app/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/css/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/img/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/js/*</url-pattern>
</servlet-mapping>
<!--注册SpringMVC DispatcherServlet的核心处理器-->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<!--服务器启动时创建核心处理器实例-->
<load-on-startup>1</load-on-startup>
</servlet>
<!--配置SpringMVC拦截路径-->
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--启动SpringContext-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--乱码处理-->
<!--Spring自带的CharacterEncodingFilter过滤器-->
<filter>
<filter-name>CharacterEncodingFilter</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>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
整个项目即可配置完成,最后再检查一下有没有将配置文件导入
整个项目即可配置完成
最后再提醒一遍,不要一味地复制粘贴,要搞清楚他们之间的关系!!!