SSM整合
1. 依赖添加
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数据库准备
依然沿用mybatis数据库测试脚本！
CREATE DATABASE `mybatis-example`; USE `mybatis-example`; CREATE TABLE `t_emp`( emp_id INT AUTO_INCREMENT, emp_name CHAR(100), emp_salary DOUBLE(10,5), PRIMARY KEY(emp_id) ); INSERT INTO `t_emp`(emp_name,emp_salary) VALUES("tom",200.33); INSERT INTO `t_emp`(emp_name,emp_salary) VALUES("jerry",666.66); INSERT INTO `t_emp`(emp_name,emp_salary) VALUES("andy",777.77); -
准备项目
part04-ssm-integration
转成web项目
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依赖导入
pom.xml
<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>4.0.0modelVersion> <groupId>com.atguigugroupId> <artifactId>part04-ssm-integrationartifactId> <version>1.0-SNAPSHOTversion> <packaging>warpackaging> <properties> <spring.version>6.0.6spring.version> <jakarta.annotation-api.version>2.1.1jakarta.annotation-api.version> <jakarta.jakartaee-web-api.version>9.1.0jakarta.jakartaee-web-api.version> <jackson-databind.version>2.15.0jackson-databind.version> <hibernate-validator.version>8.0.0.Finalhibernate-validator.version> <commons-fileupload.version>1.3.1commons-fileupload.version> <mybatis.version>3.5.11mybatis.version> <mysql.version>8.0.25mysql.version> <pagehelper.version>5.1.11pagehelper.version> <druid.version>1.2.8druid.version> <mybatis-spring.version>3.0.2mybatis-spring.version> <jakarta.servlet.jsp.jstl-api.version>3.0.0jakarta.servlet.jsp.jstl-api.version> <logback.version>1.2.3logback.version> <lombok.version>1.18.26lombok.version> <maven.compiler.source>17maven.compiler.source> <maven.compiler.target>17maven.compiler.target> <project.build.sourceEncoding>UTF-8project.build.sourceEncoding> properties> <dependencies> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-contextartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>jakarta.annotationgroupId> <artifactId>jakarta.annotation-apiartifactId> <version>${jakarta.annotation-api.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-aopartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-aspectsartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-txartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-jdbcartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-webmvcartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>jakarta.platformgroupId> <artifactId>jakarta.jakartaee-web-apiartifactId> <version>${jakarta.jakartaee-web-api.version}version> <scope>providedscope> dependency> <dependency> <groupId>jakarta.servlet.jsp.jstlgroupId> <artifactId>jakarta.servlet.jsp.jstl-apiartifactId> <version>${jakarta.servlet.jsp.jstl-api.version}version> dependency> <dependency> <groupId>commons-fileuploadgroupId> <artifactId>commons-fileuploadartifactId> <version>${commons-fileupload.version}version> dependency> <dependency> <groupId>com.fasterxml.jackson.coregroupId> <artifactId>jackson-databindartifactId> <version>${jackson-databind.version}version> dependency> <dependency> <groupId>org.hibernate.validatorgroupId> <artifactId>hibernate-validatorartifactId> <version>${hibernate-validator.version}version> dependency> <dependency> <groupId>org.hibernate.validatorgroupId> <artifactId>hibernate-validator-annotation-processorartifactId> <version>${hibernate-validator.version}version> dependency> <dependency> <groupId>org.mybatisgroupId> <artifactId>mybatisartifactId> <version>${mybatis.version}version> dependency> <dependency> <groupId>mysqlgroupId> <artifactId>mysql-connector-javaartifactId> <version>${mysql.version}version> dependency> <dependency> <groupId>com.github.pagehelpergroupId> <artifactId>pagehelperartifactId> <version>${pagehelper.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-webartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.mybatisgroupId> <artifactId>mybatis-springartifactId> <version>${mybatis-spring.version}version> dependency> <dependency> <groupId>ch.qos.logbackgroupId> <artifactId>logback-classicartifactId> <version>${logback.version}version> dependency> <dependency> <groupId>org.projectlombokgroupId> <artifactId>lombokartifactId> <version>${lombok.version}version> dependency> <dependency> <groupId>com.alibabagroupId> <artifactId>druidartifactId> <version>${druid.version}version> dependency> dependencies> project> -
实体类添加
com.atguigu.pojo
@Data public class Employee { private Integer empId; private String empName; private Double empSalary; } -
logback配置
位置：resources/logback.xml
<configuration debug="true"> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>[%d{HH:mm:ss.SSS}] [%-5level] [%thread] [%logger] [%msg]%npattern> <charset>UTF-8charset> encoder> appender> <root level="DEBUG"> <appender-ref ref="STDOUT" /> root> <logger name="com.atguigu.mybatis" level="DEBUG" /> configuration>
2. 控制层配置编写
主要配置controller,springmvc相关！ 本次先不配置文件上传！
位置：resources/spring-mvc.xml(命名随意)
<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">
<context:component-scan base-package="com.atguigu.controller" />
<mvc:annotation-driven />
<mvc:default-servlet-handler/>
<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>
beans>
3. 业务层配置编写
主要配置service,注解aop和声明事务相关！
位置：resources/spring-service.xml(命名随意)
<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" xmlns:tx="http://www.springframework.org/schema/tx"
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 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:component-scan base-package="com.atguigu.service,com.atguigu.advice,com.atguigu.pointcut" />
<aop:aspectj-autoproxy />
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" >
<property name="dataSource" ref="dataSource" />
bean>
<tx:annotation-driven transaction-manager="transactionManager" />
beans>
4. 持久层配置编写
jdbc外部配置
位置：resources/jdbc.properties
jdbc.user=root
jdbc.password=root
jdbc.url=jdbc:mysql:///mybatis-example
jdbc.driver=com.mysql.cj.jdbc.Driver
持久层配置
位置：resources/spring-mapper.xml(命名随意)
<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"
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">
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="username" value="${jdbc.user}"/>
<property name="password" value="${jdbc.password}"/>
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
bean>
beans>
配置mybatis方式1：保留mybaits全局配置
准备mybatis-config.xml文件：去掉数据库信息，去掉mapper包映射（xml中配置）
DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<setting name="mapUnderscoreToCamelCase" value="true"/>
<setting name="logImpl" value="SLF4J"/>
<setting name="autoMappingBehavior" value="FULL"/>
settings>
<typeAliases>
<package name="com.atguigu.pojo"/>
typeAliases>
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<property name="helperDialect" value="mysql"/>
plugin>
plugins>
configuration>
修改spring-mapper.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="username" value="${jdbc.user}"/>
<property name="password" value="${jdbc.password}"/>
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:mappers/*Mapper.xml"/>
<property name="dataSource" ref="dataSource"/>
bean>
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.atguigu.mapper"/>
bean>
beans>
配置mybatis方式2：完全配置文件实现
修改spring-mapper.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="username" value="${jdbc.user}"/>
<property name="password" value="${jdbc.password}"/>
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:mappers/*Mapper.xml"/>
<property name="dataSource" ref="dataSource"/>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configuration">
<bean class="org.apache.ibatis.session.Configuration">
<property name="mapUnderscoreToCamelCase" value="true"/>
bean>
property>
<property name="typeAliasesPackage" value="com.atguigu.pojo"/>
<property name="mapperLocations" value="classpath:mappers/*Mapper.xml"/>
<property name="dataSource" ref="dataSource"/>
bean>
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.atguigu.mapper"/>
bean>
beans>
- 容器初始化配置web.xml
<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">
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring-service.xml,classpath:spring-mapper.xmlparam-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<servlet>
<servlet-name>dispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring-mvc.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>dispatcherServletservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<filter>
<filter-name>characterEncodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>UTF-8param-value>
init-param>
<init-param>
<param-name>forceRequestEncodingparam-name>
<param-value>trueparam-value>
init-param>
<init-param>
<param-name>forceResponseEncodingparam-name>
<param-value>trueparam-value>
init-param>
filter>
<filter-mapping>
<filter-name>characterEncodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
web-app>
6. 整合测试
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需求
查询所有员工信息,返回对应json数据！
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controller
@Slf4j @RestController @RequestMapping("/employee") public class EmployeeController { @Autowired private EmployeeService employeeService; @GetMapping("list") public List<Employee> retList(){ List<Employee> employees = employeeService.findAll(); log.info("员工数据:{}",employees); return employees; } } -
service
@Service public class EmployeeServiceImpl implements EmployeeService { @Autowired private EmployeeMapper employeeMapper; /** * 查询所有员工信息 */ @Override public List<Employee> findAll() { List<Employee> employeeList = employeeMapper.queryAll(); return employeeList; } } -
mapper
mapper接口 包：com.atguigu.mapper
public interface EmployeeMapper { List<Employee> queryAll(); }mapper XML 文件位置： resources/mappers
DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "https://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.atguigu.mapper.EmployeeMapper"> <select id="queryAll" resultType="employee"> select emp_id empId,emp_name empName, emp_salary empSalary from t_emp select> mapper>