基于eclipse 的 ssm(spring+springmvc+mybatis)项目搭建 -注解版

项目目录

与xml版区别在于下图三个文件

WebAppInitializer.java 对应文件web.xml

WebConfig.java 对应文件dispatcher-servlet.xml

RootConfig.java 对应文件 applicationContext.xml

其他文件都一致

package config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{

    @Override
    protected Class<?>[] getRootConfigClasses() {
        // TODO Auto-generated method stub
        return new Class<?>[] {RootConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        // TODO Auto-generated method stub
        return new Class<?>[] {WebConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        // TODO Auto-generated method stub
        return new String[] {"/"};
    }

}

WebAppInitializer.java

package config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@ComponentScan(value="com.*",includeFilters= {@Filter(type=FilterType.ANNOTATION,value= {Controller.class})})
@EnableWebMvc
public class WebConfig {

    @Bean(name="internalResourceViewResolver")
    public ViewResolver initViewResolver() {
        InternalResourceViewResolver viewResolver=new InternalResourceViewResolver();
        viewResolver.setPrefix("/jsp/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }
}

WebConfig.java

package config;

import java.util.Properties;

import javax.sql.DataSource;

import org.apache.tomcat.dbcp.dbcp2.BasicDataSourceFactory;
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.ComponentScan.Filter;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;

@Configuration
@ComponentScan(value="com.*",includeFilters= {@Filter(type=FilterType.ANNOTATION,value= {Service.class})})
@EnableTransactionManagement
public class RootConfig implements TransactionManagementConfigurer {

    private DataSource dataSource=null;
    
    
    @Bean(name="dataSource")
    public DataSource initDataSource() {
        if(dataSource!=null)
            return dataSource;
    
        Properties props=new Properties();
        props.setProperty("driverClassName", "com.mysql.jdbc.Driver");
        props.setProperty("url", "jdbc:mysql://localhost:3306/test?allowPublicKeyRetrieval=true");
        props.setProperty("username", "root");
        props.setProperty("password", "admin");
        props.setProperty("maxActive", "200");
        props.setProperty("maxIdle", "20");
        props.setProperty("maxWait", "30000");

    
    try {
        dataSource=BasicDataSourceFactory.createDataSource(props);
    }catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
    }
    return dataSource;
    }
    
    
    @Bean(name="sqlSessionFactory")
    public SqlSessionFactoryBean initSqlSessionFactory() {
        SqlSessionFactoryBean sqlSessionFactory=new SqlSessionFactoryBean();
        sqlSessionFactory.setDataSource(initDataSource());
        Resource resource=new ClassPathResource("mybatis/mybatis-config.xml");
        sqlSessionFactory.setConfigLocation(resource);
        return sqlSessionFactory;
    }
    
    @Bean
    public MapperScannerConfigurer initMapperScannerConfigurer() {
        MapperScannerConfigurer msc=new MapperScannerConfigurer();
        msc.setBasePackage("com.*");
        msc.setSqlSessionFactoryBeanName("sqlSessionFactory");
        msc.setAnnotationClass(Repository.class);
        return msc;
    }
    
    @Override
    @Bean(name="annotationDrivenTransactionManager")
    public PlatformTransactionManager annotationDrivenTransactionManager() {
        // TODO Auto-generated method stub
        DataSourceTransactionManager transactionManager=new DataSourceTransactionManager();
        transactionManager.setDataSource(initDataSource());
        return transactionManager;
    }

    
    
}

RootConfig.java

注意事项如下:

Demo中 数据库的账号密码 改为自己的，然后创建 test 数据库 再创建 test 表，或者改相应文件中的 数据库名和表名， mybatis 配置文件中用到的实体的字段应和数据库表中的字段保持一致，数据类型保持一致 

相对来说，注解配置更易于理解，项目结构更清晰，更简洁。

其他的参考 基于eclipse 的 ssm(spring+springmvc+mybatis)项目搭建 -xml版

链接：https://pan.baidu.com/s/1mRxmgsLIPq7093U4sp0Cug
提取码：m9gi