SSM_基于JavaConfig（不使用XML配置文件）整合Spring&SpringMVC&Mybatis

系统管理员 2023-06-27 05:54 9阅读 0赞

1.  在pom.xml中导入相关依赖

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com.ssm</groupId>
      <artifactId>ssm-integration</artifactId>
      <version>1.0.0</version>
      <packaging>war</packaging>
      
      <properties>
      	<spring-version>5.2.2.RELEASE</spring-version>
      	<mybatis-version>3.4.6</mybatis-version>
      	<mybatis-spring-version>2.0.3</mybatis-spring-version>
      	<dbcp-version>2.7.0</dbcp-version>
      	<mysql-version>5.1.47</mysql-version>
      	<log4j-version>1.2.17</log4j-version>
      	<war-plugin-version>3.2.3</war-plugin-version>
      </properties>
      <dependencies>
      	
      	 
    	<dependency>
    	    <groupId>org.springframework</groupId>
    	    <artifactId>spring-webmvc</artifactId>
    	    <version>${spring-version}</version>
    	</dependency>
      	 
    	<dependency>
    	    <groupId>org.springframework</groupId>
    	    <artifactId>spring-jdbc</artifactId>
    	    <version>${spring-version}</version>
    	</dependency>
    	  	 
    	<dependency>
    	    <groupId>org.mybatis</groupId>
    	    <artifactId>mybatis</artifactId>
    	    <version>${mybatis-version}</version>
    	</dependency>
    	  	 
    	<dependency>
    	    <groupId>org.mybatis</groupId>
    	    <artifactId>mybatis-spring</artifactId>
    	    <version>${mybatis-spring-version}</version>
    	</dependency>
    	  	 
    	<dependency>
    	    <groupId>org.apache.commons</groupId>
    	    <artifactId>commons-dbcp2</artifactId>
    	    <version>${dbcp-version}</version>
    	</dependency>
    	  	 
    	<dependency>
    	    <groupId>mysql</groupId>
    	    <artifactId>mysql-connector-java</artifactId>
    	    <version>${mysql-version}</version>
    	</dependency>
    	  	 
    	<dependency>
    	    <groupId>log4j</groupId>
    	    <artifactId>log4j</artifactId>
    	    <version>${log4j-version}</version>
    	</dependency>
    	  	 
      </dependencies>
      
      <build>
      	<plugins>
      		
      		<plugin>
    	        <groupId>org.apache.maven.plugins</groupId>
    	        <artifactId>maven-war-plugin</artifactId>
    	        <version>${war-plugin-version}</version>
    	      </plugin>
      	</plugins>
      </build>
    </project>

1.  创建WebAppInit类（相当于web.xml）

package com.aowin;
    
    import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
    
    /**
     * web.xml
     * @author 83998
     *
     */
    public class WebAppInit extends AbstractAnnotationConfigDispatcherServletInitializer {
        
    	/**
    	 * applicationContext.xml
    	 */
    	@Override
    	protected Class<?>[] getRootConfigClasses() {
        
    		return new Class<?>[] {
         RootConfig.class };
    	}
    
    	/**
    	 * springDispatcherServlet-servlet.xml
    	 */
    	@Override
    	protected Class<?>[] getServletConfigClasses() {
        
    		return new Class<?>[] {
         WebMvcConfig.class };
    	}
    
    	/**
    	 * springDispatcherServlet-servlet.xml's url-pattern
    	 */
    	@Override
    	protected String[] getServletMappings() {
        
    		return new String[] {
         "/" };
    	}
    }

1.  定义WebMVCConfig类

package com.aowin;
    
    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.WebMvcConfigurer;
    
    /**
     * springDispatcherServlet-servlet.xml
     * @author 83998
     *
     */
    @Configuration
    @EnableWebMvc
    @ComponentScan("com.test.controller")
    public class WebMvcConfig implements WebMvcConfigurer {
        
    	/**
    	 * 可以加载静态资源
    	 */
    	@Override
    	public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        
    		configurer.enable();
    	}
    }

1.  定义数据源配置类DataSourceConfig

package com.aowin;
    
    import javax.sql.DataSource;
    
    import org.apache.commons.dbcp2.BasicDataSource;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.PropertySource;
    
    @Configuration
    @PropertySource("classpath:jdbc.properties")
    public class DataSourceConfig {
        
    	@Value("${jdbc.driver}")
    	private String driver;
    	@Value("${jdbc.url}")
    	private String url;
    	@Value("${jdbc.username}")
    	private String username;
    	@Value("${jdbc.password}")
    	private String password;
    
    	/**
    	 * 配置数据源 dbcp2
    	 * @return
    	 */
    	@Bean
    	public DataSource dataSource() {
        
    		BasicDataSource dataSource = new BasicDataSource();
    		dataSource.setDriverClassName(driver);
    		dataSource.setUrl(url);
    		dataSource.setUsername(username);
    		dataSource.setPassword(password);
    		return dataSource;
    	}
    }

1.  定义RootConfig类

package com.aowin;
    
    import javax.sql.DataSource;
    
    import org.apache.ibatis.session.SqlSessionFactory;
    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 org.springframework.context.annotation.Import;
    import org.springframework.core.io.ClassPathResource;
    import org.springframework.jdbc.datasource.DataSourceTransactionManager;
    import org.springframework.transaction.annotation.EnableTransactionManagement;
    
    /**
     * applicationContext.xml
     * @author 83998
     *
     */
    @Configuration
    @Import(DataSourceConfig.class)
    @EnableTransactionManagement
    @ComponentScan("com.test.service.impl")
    public class RootConfig {
        
    
    	/**
    	 * 创建sqlSessionFactory
    	 * @return
    	 * @throws Exception 
    	 */
    	@Bean
    	public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {
        
    		SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
    		sqlSessionFactoryBean.setDataSource(dataSource);
    		sqlSessionFactoryBean.setConfigLocation(new ClassPathResource("mybatis-config.xml"));
    		return sqlSessionFactoryBean.getObject();
    	}
    
    	/**
    	 * 创建Mapper接口的代理对象
    	 * @return
    	 */
    	@Bean
    	public MapperScannerConfigurer mapperScannerConfigurer() {
        
    		MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
    		mapperScannerConfigurer.setBasePackage("com.test.dao");
    		return mapperScannerConfigurer;
    	}
    
    	/**
    	 * 事务管理器
    	 * @param dataSource
    	 * @return
    	 */
    	@Bean
    	public DataSourceTransactionManager dataSourceTransactionManager(DataSource dataSource) {
        
    		DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
    		dataSourceTransactionManager.setDataSource(dataSource);
    		return dataSourceTransactionManager;
    	}
    }

注意：

1.  RootConfig和WebMvcConfig都是在WebAppInit调用时new出来的两个IOC容器，所以这两个类中不能通过添加@AutoWired或者@Value等注解给属性赋值。因为通过注解完成依赖注入是IOC容器的任务，IOC容器不能在自身初始化的过程中给自己完成依赖注入。