springMvc的初始配置

基础文件结构(toWeb插件)

1.导入对应依赖

<?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.atguigu</groupId>  <artifactId>part04-ssm-integration</artifactId>  <version>1.0-SNAPSHOT</version>  <packaging>war</packaging><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><!--需要依赖清单分析:springioc/dispring-context / 6.0.6jakarta.annotation-api / 2.1.1  jsr250aopspring-aspects / 6.0.6txspring-tx  / 6.0.6spring-jdbc / 6.0.6springmvcspring-webmvc 6.0.6jakarta.jakartaee-web-api 9.1.0jackson-databind 2.15.0hibernate-validator / hibernate-validator-annotation-processor 8.0.0.Finalmybatismybatis  / 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数据库连接池    druid / xlombok        lombok / 1.18.26logback       logback/ 1.2.3--><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><!--springmvcspring-webmvc 6.0.6jakarta.jakartaee-web-api 9.1.0jackson-databind 2.15.0hibernate-validator / hibernate-validator-annotation-processor 8.0.0.Final--><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><!-- https://mvnrepository.com/artifact/org.hibernate.validator/hibernate-validator --><dependency><groupId>org.hibernate.validator</groupId><artifactId>hibernate-validator</artifactId><version>${hibernate-validator.version}</version></dependency><!-- https://mvnrepository.com/artifact/org.hibernate.validator/hibernate-validator-annotation-processor --><dependency><groupId>org.hibernate.validator</groupId><artifactId>hibernate-validator-annotation-processor</artifactId><version>${hibernate-validator.version}</version></dependency><!--mybatismybatis  / 3.5.11mysql    / 8.0.25pagehelper / 5.1.11--><!-- mybatis依赖 --><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>${pagehelper.version}</version></dependency><!-- 整合第三方特殊依赖 --><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${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>

2，分别创建controller,service,mapper层的配置文件

controller层

package com.atguigu.config;import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;/*** 配置WebConfig类 implements WebMvcConfigurer* 1.ComponentScan加载 controller* 2.ComponentScan加载 全局异常处理* 3.EnableWebMvc导入 handlerMapping handlerAdapter* 4.重写configureDefaultServletHandling 配置 静态资源处理* 5.jsp* 6.json转换器* 7.重写addInterceptors 配置 拦截器*/
@EnableWebMvc
@ComponentScan("com.atguigu.controller")
@Configuration
public class WebMvcJavaConfig implements WebMvcConfigurer {//静态资源@Overridepublic void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {configurer.enable();}//拦截器@Overridepublic void addInterceptors(InterceptorRegistry registry) {//registry.addInterceptor();}
}

service层

package com.atguigu.config;import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;/*** 配置WebConfig类 implements WebMvcConfigurer* 1.ComponentScan加载 controller* 2.ComponentScan加载 全局异常处理* 3.EnableWebMvc导入 handlerMapping handlerAdapter* 4.重写configureDefaultServletHandling 配置 静态资源处理* 5.jsp* 6.json转换器* 7.重写addInterceptors 配置 拦截器*/
@EnableWebMvc
@ComponentScan("com.atguigu.controller")
@Configuration
public class WebMvcJavaConfig implements WebMvcConfigurer {//静态资源@Overridepublic void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {configurer.enable();}//拦截器@Overridepublic void addInterceptors(InterceptorRegistry registry) {//registry.addInterceptor();}
}

mapper层（另外创建DataSourceJavaConfig ）

@Configuration
@PropertySource("classpath:jdbc.properties")
public class DataSourceJavaConfig {@Value("${jdbc.user}")private String user;@Value("${jdbc.password}")private String password;@Value("${jdbc.url}")private String url;@Value("${jdbc.driver}")private String driver;//数据库连接池配置@Beanpublic DataSource dataSource(){DruidDataSource dataSource = new DruidDataSource();dataSource.setUsername(user);dataSource.setPassword(password);dataSource.setUrl(url);dataSource.setDriverClassName(driver);return dataSource;}}

package com.atguigu.config;import com.github.pagehelper.PageInterceptor;
import org.apache.ibatis.logging.slf4j.Slf4jImpl;
import org.apache.ibatis.session.AutoMappingBehavior;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;import javax.sql.DataSource;
import java.util.Properties;/*** projectName: com.atguigu.config** description: 持久层配置和Druid和Mybatis配置 使用一个配置文件*/
@Configurationpublic class MapperJavaConfig {/*** 配置SqlSessionFactoryBean,指定连接池对象和外部配置文件即可* @param dataSource 需要注入连接池对象* @return 工厂Bean*/@Beanpublic SqlSessionFactoryBean sqlSessionFactoryBean(DataSource dataSource){//实例化SqlSessionFactory工厂SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();//设置连接池sqlSessionFactoryBean.setDataSource(dataSource);//TODO: 替代xml文件的java配置/*<settings><!-- 开启驼峰式映射--><setting name="mapUnderscoreToCamelCase" value="true"/><!-- 开启logback日志输出--><setting name="logImpl" value="SLF4J"/><!--开启resultMap自动映射 --><setting name="autoMappingBehavior" value="FULL"/></settings><typeAliases><!-- 给实体类起别名 --><package name="com.atguigu.pojo"/></typeAliases><plugins><plugin interceptor="com.github.pagehelper.PageInterceptor"><!--helperDialect：分页插件会自动检测当前的数据库链接，自动选择合适的分页方式。你可以配置helperDialect属性来指定分页插件使用哪种方言。配置时，可以使用下面的缩写值：oracle,mysql,mariadb,sqlite,hsqldb,postgresql,db2,sqlserver,informix,h2,sqlserver2012,derby（完整内容看 PageAutoDialect） 特别注意：使用 SqlServer2012 数据库时，https://github.com/pagehelper/Mybatis-PageHelper/blob/master/wikis/zh/HowToUse.md#%E5%A6%82%E4%BD%95%E9%85%8D%E7%BD%AE%E6%95%B0%E6%8D%AE%E5%BA%93%E6%96%B9%E8%A8%80--><property name="helperDialect" value="mysql"/></plugin></plugins>*///settings [包裹到一个configuration对象,切记别倒错包]org.apache.ibatis.session.Configuration configuration = new org.apache.ibatis.session.Configuration();configuration.setMapUnderscoreToCamelCase(true);configuration.setLogImpl(Slf4jImpl.class);configuration.setAutoMappingBehavior(AutoMappingBehavior.FULL);sqlSessionFactoryBean.setConfiguration(configuration);//typeAliasessqlSessionFactoryBean.setTypeAliasesPackage("com.atguigu.pojo");//分页插件配置PageInterceptor pageInterceptor = new PageInterceptor();Properties properties = new Properties();properties.setProperty("helperDialect","mysql");pageInterceptor.setProperties(properties);sqlSessionFactoryBean.addPlugins(pageInterceptor);return sqlSessionFactoryBean;}/*** 配置Mapper实例扫描工厂,配置 <mapper <package 对应接口和mapperxml文件所在的包* @return*/@Beanpublic MapperScannerConfigurer mapperScannerConfigurer(){MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();//设置mapper接口和xml文件所在的共同包mapperScannerConfigurer.setBasePackage("com.atguigu.mapper");return mapperScannerConfigurer;}}

3.统一放入IOC容器中

package com.atguigu.config;import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;public class SpringIoCInit extends AbstractAnnotationConfigDispatcherServletInitializer {/*** ServletConfig-->RootConfig* @return*///其他@Overrideprotected Class<?>[] getRootConfigClasses() {return new Class[]{ServiceJavaConfig.class,MapperJavaConfig.class,DataSourceJavaConfig.class};}//controller层@Overrideprotected Class<?>[] getServletConfigClasses() {return new Class[]{WebMvcJavaConfig.class};}@Overrideprotected String[] getServletMappings() {return new String[]{"/"};}
}

打印格式

<?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>