纯注解整合SSM

依赖 

<?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.cwh.ssm</groupId>
    <artifactId>ssm-annotation2</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    
    <!--依赖-->
    <dependencies>
        <!--Junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <!--数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.43</version>
        </dependency>

        <!--数据库连接池-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>



        <!--Mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.9</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.7</version>
        </dependency>



        <!--Spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.18</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.6.RELEASE</version>
        </dependency>

        <!--前端视图解析器-->
        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring5</artifactId>
            <version>3.0.15.RELEASE</version>
        </dependency>


        <!--servletAPI-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>



        <!--lombok工具-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.22</version>
        </dependency>





        <!--slf4j-api 与slf4j -jdk存在 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-jdk14</artifactId>
            <version>1.7.25</version>
        </dependency>



    </dependencies>

</project>

mybatis

/**
 * @author cwh
 * @version 1.0
 * @Date 2022/4/19
 * 配置 mybatis
 */

@Configuration
@PropertySource("classpath:jdbc.properties")    //关联jdbc配置文件
@MapperScan(basePackages = "com.cwh.ssm.mappers")  //扫描mapper接口的
public class DaoConfig {

    @Value("${jdbc.driverClassName}")  //隔山打牛
    private String driverName;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.username}")
    private String username;
    @Value("${jdbc.password}")
    private String password;


    //数据源
    @Bean
    public DruidDataSource dataSource() {
        DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setDriverClassName(driverName);
        druidDataSource.setUrl(url);
        druidDataSource.setUsername(username);
        druidDataSource.setPassword(password);

        return druidDataSource;
    }


    //SqlSessionFacrotyBean  
    @Bean
    public SqlSessionFactoryBean sqlSessionFactoryBean(DruidDataSource dataSource) throws IOException {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource); //设置DataSource
        sqlSessionFactoryBean.setTypeAliasesPackage("com.cwh.ssm.pojo"); //启用别名

        //获取Resource代表配置文件的路径
        PathMatchingResourcePatternResolver pathMatchingResourcePatternResolver = new PathMatchingResourcePatternResolver();
        Resource resource = pathMatchingResourcePatternResolver.getResource("classpath:mybatis-config.xml");

        //设置全局配置文件路径
        sqlSessionFactoryBean.setConfigLocation(resource);


        //获取存放mapper.xml目录下的所有映射文件路径(可以算是路径吧)
        Resource[] mapperXmls = pathMatchingResourcePatternResolver.getResources("classpath:com/cwh/ssm/mappers2/**");

        //当mapper.xml和mapper接口 路径不同时通过这个设置修改路径
        sqlSessionFactoryBean.setMapperLocations(mapperXmls);

        return sqlSessionFactoryBean;

    }

}

SpringMVC

(配置的东东有点少，毕竟练习配置，能实现简单的交互就行)

@Configuration
@ComponentScan(basePackages = "com.cwh.ssm.controller")//扫描
@EnableWebMvc //注解驱动
public class WebConfig implements WebMvcConfigurer {


    //中央控制器
    @Bean
    public DispatcherServlet dispatcherServlet() {
        return new DispatcherServlet();
    }

    //启动DefaultServlet ，用于处理静态资源的请求
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }



    //配置生成模板解析器
    @Bean
    public ITemplateResolver templateResolver(ServletContext servletContext) {
        WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();
        ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver(servletContext);
        templateResolver.setPrefix("/WEB-INF/templates/");
        templateResolver.setSuffix(".html");
        templateResolver.setCharacterEncoding("UTF-8");
        templateResolver.setTemplateMode(TemplateMode.HTML);
        return templateResolver;
    }


    //生成模板引擎并为模板引擎注入模板解析器
    @Bean
    public SpringTemplateEngine templateEngine(ITemplateResolver templateResolver) {
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
        templateEngine.setTemplateResolver(templateResolver);
        return templateEngine;
    }

    //生成视图解析器并未解析器注入模板引擎
    @Bean
    public ViewResolver viewResolver(SpringTemplateEngine templateEngine) {
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
        viewResolver.setCharacterEncoding("UTF-8");
        viewResolver.setTemplateEngine(templateEngine);
        return viewResolver;
    }


}

Application

@Configuration
@ComponentScan(basePackages = "com.cwh.ssm.service")
@Import({DaoConfig.class}) //整合Mybatis的配置文件 
public class ApplicationConfig {

}

Web.xml的代替

package com.cwh.ssm.config;


import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.filter.HiddenHttpMethodFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

import javax.servlet.Filter;
import javax.servlet.ServletContext;

/**
 * @author cwh
 * @version 1.0
 * @Date 2022/4/19
 */

public class WebInit extends AbstractAnnotationConfigDispatcherServletInitializer {

    //注册过滤器
    @Override
    protected javax.servlet.FilterRegistration.Dynamic registerServletFilter(ServletContext servletContext, Filter filter) {

        //解决乱码
        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
        characterEncodingFilter.setEncoding("utf-8");
        characterEncodingFilter.setForceResponseEncoding(true);

        //支持Rest的请求方式
        HiddenHttpMethodFilter hiddenHttpMethodFilter = new HiddenHttpMethodFilter();

        servletContext.addFilter("characterEncodingFilter",characterEncodingFilter);
        servletContext.addFilter("hiddenHttpMethodFilter",hiddenHttpMethodFilter);

        return super.registerServletFilter(servletContext, filter);
    }
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[]{ApplicationConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[]{WebConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}