SSM三大框架整合梳理
整合步骤
0、搭建动态web项目
1、需要的jar包
- spring（包括springmvc）
- mybatis相关jar包
- mybatis与spring的整合包（个人建议尽量使用高版本的，避免出现一些奇怪的错误mybatis-spring-2.0.2.jar）
- 数据库驱动包（mysql-connector-java-5.1.44.jar）
- 第三方连接池（druid-1.1.10.jar，也可用spring的dbcp连接池或c3p0连接池c3p0-0.9.5.2.jar）
- json依赖包Jackson
- jstl标签库
以下为可选
8. 另外，若要使用mybatis逆向工程，需导入mybatis-generator-core-1.3.5.jar以及增加配置文件mbg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 配置数据库连接 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="root"
password="123">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 指定Javabean生成的位置 -->
<javaModelGenerator targetPackage="com.fei.pojo"
targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- 指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="mapper"
targetProject=".\src\main\resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 指定mapper（dao）接口生成的位置 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.fei.mapper" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- 指定每个表的生成策略 -->
<table tableName="tbl_emp" domainObjectName="Employee"></table>
<table tableName="tbl_dept" domainObjectName="Department"></table>
</context>
</generatorConfiguration>
还有核心主程序
package com.fei.test;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
/**
* mybatis代码生成主程序
* @Author xiaofei
* @CreateDate 2019年9月2日
*/
public class MBGTest {
public static void main(String[] args) throws Exception {
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("mybatis-generator.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
System.out.println("代码生成完毕！请查收");
}
}
- 若要使用分页插件，还需导入pagehelper-5.1.2.jar和jsqlparser-1.0.jar
- 若要使用文件上传还要另外导相关的包
2、整合思路
- dao层
- sqlMapConfig.xml，空文件即可，但是需要文件头
- applicationContext-dao.xml
- 数据库连接池druid
- sqlSessionFactory对象，需要spring和mybatis整合包下的
- 配置mapper文件扫描器，Mapper动态代理开发增强版
- service层
- applicationContext-service.xml：配置包扫描器，扫描@service注解的组件类
- applicationContext-tx.xml配置事务
- web层
- springmvc.xml：核心三大组件
- web.xml：前端控制器、拦截器、编码过滤器等
也可以将dao层和service层的配置在一个文件中
下面是配置文件，我把dao层的applicationContext-dao.xml和applicationContext-service.xml写到一个配置文件spring-mybatis.xml中
3、配置文件编写
- applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd ">
<!-- spring的配置文件，这里主要配置业务和逻辑有关的配置，包括数据源，事务控制 -->
<context:component-scan base-package="com.fei.service">
<!-- <context:exclude-filter type="annotation" expression=" org.springframework.stereotype.Controller"/> -->
</context:component-scan>
<!-- ==================数据源的配置start================== -->
<!-- 告诉spring让他去读取db.properties配置文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<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>
<!-- ==================数据源的配置end================== -->
<!-- ==============配置spring和mybatis的整合start============== -->
<!-- MyBatis工厂 -->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- 指定mybatis核心配置文件的位置 -->
<property name="configLocation" value="classpath:sqlMapConfig.xml"/>
<!-- 指定mapper文件的位置 -->
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
</bean>
<!-- 配置扫描器，将mybatis接口的实现（一个代理对象）加入到ioc容器中，Mapper动态代理开发，扫描 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 指定基本包，扫描所有mapper接口的实现，加入到ioc容器中 -->
<property name="basePackage" value="com.fei.mapper"/>
</bean>
<!-- 配置一个可以执行批量操作的sqlSession -->
<bean id="sqlSession" class=" org.mybatis.spring.SqlSessionTemplate">
<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactoryBean"/>
<constructor-arg name="executorType" value="BATCH"/>
</bean>
<!-- ==============配置spring和mybatis的整合end============== -->
<!-- ====================事务控制的配置start==================== -->
<!-- 注解事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 控制住数据源里面连接的开启、关闭、回滚等操作 -->
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 1）开启基于注解的事务 -->
<!-- <tx:annotation-driven transaction-manager="transactionManager"/> -->
<!-- 2）开启基于xml配置的事务（比较重要的都是用配置形式） -->
<aop:config>
<!-- 切入点表达式 -->
<aop:pointcut expression="execution(* com.fei.service..*(..))" id="txPoint"/>
<!-- 配置事务增强 -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>
</aop:config>
<!-- 配置事务增强，事务如何切入 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 所有的方法都是事务方法 -->
<tx:method name="*"/>
<tx:method name="get*" read-only="true"/>
</tx:attributes>
</tx:advice>
<!-- ====================事务控制的配置end==================== -->
<!-- spring配置文件核心点（数据源，与mybatis的整合，事务控制） -->
<!-- springmvc的异常处理器 -->
<!-- <bean class="com.fei.exception.CustomExceptionResolver"/> -->
</beans>
- springmvc.xml
<?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">
<!-- springmvc的配置文件，主要包含网站跳转的逻辑控制 -->
<!-- 配置controller扫描，精准扫描 -->
<context:component-scan base-package="com.fei.controller" />
<!-- 定义视图文件解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- 两个标准配置 -->
<!-- 将springmvc不能处理的请求交给tomcat -->
<mvc:default-servlet-handler/>
<!-- 能支持一些springmvc更高级的一些功能，JSR303校验，快捷的ajax...，映射动态请求 -->
<mvc:annotation-driven/>
<!-- ================ 上面是springmvc的基本配置 ================ -->
<!-- 对静态资源放行 -->
<!-- <mvc:resources location="/css/" mapping="/css/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<mvc:resources location="/fonts/" mapping="/fonts/**"/>
<mvc:resources location="/img/" mapping="/img/**"/>
<mvc:resources location="/bower_components/" mapping="/bower_components/**"/>
<mvc:resources location="/dist/" mapping="/dist/**"/>
<mvc:resources location="/plugins/" mapping="/plugins/**"/> -->
<!-- 配置拦截器（多个） -->
<!-- <mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<mvc:exclude-mapping path="/login"/>
<mvc:exclude-mapping path="/static/**"/>
<bean class="com.fei.ssmcrm.interceptor.LoginInterceptor"/>
</mvc:interceptor>
</mvc:interceptors> -->
<!-- 读取配置文件，解决硬编码问题 -->
<!-- <context:property-placeholder location="classpath:code-params.properties" /> -->
</beans>
- db.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///ssm_crud?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123
- sqlMapConfig.xml
<?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>
<!-- 配置别名，放置实体类 -->
<typeAliases>
<package name="com.fei.pojo"/>
</typeAliases>
<!-- pagehelper分页插件注册 -->
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<!-- 分页参数合理化 -->
<property name="resonable" value="true"/>
</plugin>
</plugins>
</configuration>
- web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<!-- 1、启动spring容器 -->
<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>
<!-- 2、springmvc的前端控制器，拦截所有请求 -->
<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:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 3、字符编码过滤器，一定要放在所有过滤器之前 -->
<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>
<init-param>
<param-name>forceRequestEncoding</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>forceResponseEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 4、使用Restful风格的URI，将页面普通的post请求转为指定的delete或put请求 -->
<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 处理直接发送put请求的过滤器 -->
<filter>
<filter-name>HttpPutFormContentFilter</filter-name>
<filter-class> org.springframework.web.filter.HttpPutFormContentFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>HttpPutFormContentFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
