08 整合SSM快速实战

整合配置实战

1 数据库/依赖/实体类/日志准备

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);

创建新项目SSM_Integration , 新项目下新建模块SSM_Integration-01,并将模块转成web项目
依赖导入

<?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.atguigu</groupId>  <artifactId>part04-ssm-integration</artifactId>  <version>1.0-SNAPSHOT</version>  <packaging>war</packaging><!--需要依赖清单分析:springioc/dispring-context / 6.0.6jakarta.annotation-api / 2.1.1  (提供Resource注解)aopspring-aspects / 6.0.6txspring-tx  / 6.0.6    (事务管理)spring-jdbc / 6.0.6    springmvcspring-webmvc 6.0.6jakarta.jakartaee-web-api 9.1.0   (Servlet)jackson-databind 2.15.0     (JSON转换)hibernate-validator / hibernate-validator-annotation-processor 8.0.0.Final   (校验注解)mybatismybatis  / 3.5.11mysql    / 8.0.25pagehelper / 5.1.11整合需要加载spring容器 spring-web / 6.0.6整合mybatis   mybatis-spring x x  (提供FactoryBean帮忙实例化mybatis对象)数据库连接池    druid / xlombok        lombok / 1.18.26logback       logback/ 1.2.3--><properties><spring.version>6.0.6</spring.version><jakarta.annotation-api.version>2.1.1</jakarta.annotation-api.version><jakarta.jakartaee-web-api.version>9.1.0</jakarta.jakartaee-web-api.version><jackson-databind.version>2.15.0</jackson-databind.version><hibernate-validator.version>8.0.0.Final</hibernate-validator.version><mybatis.version>3.5.11</mybatis.version><mysql.version>8.0.25</mysql.version><pagehelper.version>5.1.11</pagehelper.version><druid.version>1.2.8</druid.version><mybatis-spring.version>3.0.2</mybatis-spring.version><jakarta.servlet.jsp.jstl-api.version>3.0.0</jakarta.servlet.jsp.jstl-api.version><logback.version>1.2.3</logback.version><lombok.version>1.18.26</lombok.version><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target>  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties><dependencies><!--spring pom.xml依赖--><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>jakarta.annotation</groupId><artifactId>jakarta.annotation-api</artifactId><version>${jakarta.annotation-api.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>${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>${spring.version}</version></dependency><dependency><groupId>jakarta.platform</groupId><artifactId>jakarta.jakartaee-web-api</artifactId><version>${jakarta.jakartaee-web-api.version}</version><scope>provided</scope></dependency><!-- jsp需要依赖! jstl--><dependency><groupId>jakarta.servlet.jsp.jstl</groupId><artifactId>jakarta.servlet.jsp.jstl-api</artifactId><version>${jakarta.servlet.jsp.jstl-api.version}</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>${jackson-databind.version}</version></dependency><dependency><groupId>org.hibernate.validator</groupId><artifactId>hibernate-validator</artifactId><version>${hibernate-validator.version}</version></dependency><dependency><groupId>org.hibernate.validator</groupId><artifactId>hibernate-validator-annotation-processor</artifactId><version>${hibernate-validator.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>${mybatis.version}</version></dependency><!-- MySQL驱动 mybatis底层依赖jdbc驱动实现,本次不需要导入连接池,mybatis自带! --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper</artifactId><version>${pagehelper.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>${mybatis-spring.version}</version></dependency><!-- 日志 ， 会自动传递slf4j门面--><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-classic</artifactId><version>${logback.version}</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>${lombok.version}</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>${druid.version}</version></dependency></dependencies></project>

实体类添加

package com.sunsplanter.pojo
@Data
public class Employee {private Integer empId;private String empName;private Double empSalary;
}

logback配置

位置：resources/logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="true"><!-- 指定日志输出的位置，ConsoleAppender表示输出到控制台 --><appender name="STDOUT"class="ch.qos.logback.core.ConsoleAppender"><encoder><!-- 日志输出的格式 --><!-- 按照顺序分别是：时间、日志级别、线程名称、打印日志的类、日志主体内容、换行 --><pattern>[%d{HH:mm:ss.SSS}] [%-5level] [%thread] [%logger] [%msg]%n</pattern><charset>UTF-8</charset></encoder></appender><!-- 设置全局日志级别。日志级别按顺序分别是：TRACE、DEBUG、INFO、WARN、ERROR --><!-- 指定任何一个日志级别都只打印当前级别和后面级别的日志。 --><root level="DEBUG"><!-- 指定打印日志的appender，这里通过“STDOUT”引用了前面配置的appender --><appender-ref ref="STDOUT" /></root><!-- 根据特殊需求指定局部日志级别，可也是包名或全类名。 --><logger name="com.atguigu.mybatis" level="DEBUG" /></configuration>

2 编写Controller的配置类(SpringMVC整合)

位置sunsplanter-config

/*** 1.实现Springmvc组件声明标准化接口WebMvcConfigurer 提供了各种组件对应的方法* 2.添加配置类注解@Configuration* 3.添加mvc复合功能开关@EnableWebMvc* 4.添加controller层和异常处理层扫描注解* 5.静态资源处理处理器/jsp视图解析器前后缀/json转化器(@EnableWebMvc)/全局异常处理器/拦截器*/
@Configuration
@EnableWebMvc
@ComponentScan("com.sunsplanter.controller","com.sunsplanter.exceptionhandler")
public class WebMvcJavaConfig implements WebMvcConfigurer {//开启静态资源@Overridepublic void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {configurer.enable();}//jsp视图解析器前后缀@Overridepublic void configureViewResolvers(ViewResolverRegistry registry) {registry.jsp("WEB-INF/views","jsp");}//拦截器,指明包含的路径排除的路径@Overridepublic void addInterceptors(InterceptorRegistry registry) {//registry.addInterceptor((new 拦截器的类).addPathPatterns().excludePathPatterns)}
}

3 编写Service的配置类(AOP/TX整合)

package com.sunsplanter.config;
/*** 1. 声明@Configuration注解,代表配置类* 2. 声明@EnableTransactionManagement注解,开启事务注解支持* 3. 声明@EnableAspectJAutoProxy注解,开启aspect aop注解支持.@Before/@After/@Around* 4. 声明@ComponentScan组件扫描* 5. 声明式事务管理. 1.实现对应的事务管理器(DataSourceTransactionManager) 2.开启事务注解支持*/@EnableTransactionManagement@EnableAspectJAutoProxy@Configuration@ComponentScan("com.sunsplanter.service")public class ServiceJavaConfig {//@Bean//IoC容器自动将property中的dataSource注入此中public DataSourceTransactionManager transactionManager(DataSource dataSource){DataSourceTransactionManager transactionManager = new DataSourceTransactionManager();transactionManager.setDataSource(dataSource);return transactionManager;}}

4 编写持久层的配置类(mybatis整合)

先准备数据库连接信息:

jdbc.user=root
jdbc.password=
jdbc.url=jdbc:mysql:///mybatis-example
jdbc.driver=com.mysql.cj.jdbc.Driver

开始

主要配置mapper代理对象，连接池和mybatis核心组件配置.
原本三件套需要自己new , 现在交给IoC管理.
之前:

//1.读取外部配置文件
InputStream ips = Resources.getResourceAsStream("mybatis-config.xml");//2.创建sqlSessionFactory
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);//3.创建sqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
//4.获取mapper代理对象
EmpMapper empMapper = sqlSession.getMapper(EmpMapper.class);
//5.数据库方法调用
int rows = empMapper.deleteEmpById(1);
System.out.println("rows = " + rows);
//6.提交和回滚
sqlSession.commit();
sqlSession.close();