spring基础--注解配置ssm开发环境

使用注解配置ssm开发环境，更容易理解spring原理实现及加载流程。以下是使用注解配置ssm开发环境步骤：

一、好比建房子先打地基，搭建ssm环境需要先配置最基本的内容：

package myproject1.config;import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
import javax.servlet.MultipartConfigElement;
//AbstractAnnotationConfigDispatcherServletInitializer 里的方法是配置webapp的api,因此需要继承该类配置自己的ssm开发环境
public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {//配置IoC容器上下文的方法@Overrideprotected Class<?>[] getRootConfigClasses() {return new Class<?>[]{RootConfig.class};}//配置DispatcherServlet上下文的方法@Overrideprotected Class<?>[] getServletConfigClasses() {return new Class<?>[]{WebConfig.class};}//配置DispatcherServlet的拦截内容@Overrideprotected String[] getServletMappings() {return new String[]{"/"};}//配置上传文件@Overrideprotected void customizeRegistration(javax.servlet.ServletRegistration.Dynamic registration) {String filepath = "d:/mvc/uploads";long singleMax = (long) (5*Math.pow(2,20));long totalMax =(long)(10* Math.pow(2,20));registration.setMultipartConfig(new MultipartConfigElement(filepath,singleMax,totalMax,0));}
}

二、根据上面的配置，建立RootConfig类：

package myproject1.config;import com.fasterxml.jackson.databind.ser.std.StringSerializer;
import org.apache.commons.dbcp2.BasicDataSourceFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.*;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;import javax.sql.DataSource;import java.util.Properties;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.stereotype.Service;
import redis.clients.jedis.JedisPoolConfig;@Configuration
@ComponentScan(value = "myproject1.*",includeFilters = {@Filter(type = FilterType.ANNOTATION,value = Service.class)})
@EnableTransactionManagement
public class RootConfig implements TransactionManagementConfigurer {private DataSource dataSource=null;//连接池配置@Bean(name="dataSource")public DataSource initDataSource(){if(dataSource!=null){return dataSource;}Properties property = new Properties();property.setProperty("driverClassName","com.mysql.jdbc.Driver");property.setProperty("url","jdbc:mysql://localhost:3306/mydata");property.setProperty("username","root");property.setProperty("password","123456");property.setProperty("maxActive","200");property.setProperty("maxIdle","20");property.setProperty("maxWait","30000");try{dataSource = BasicDataSourceFactory.createDataSource(property);}catch (Exception e){e.printStackTrace();}return  dataSource;}//连接工厂配置，管理数据库连接@Bean(name="sqlSessionFactory")public SqlSessionFactoryBean initSqlSessionFactory(){SqlSessionFactoryBean sqlSessionFactory = new SqlSessionFactoryBean();sqlSessionFactory.setDataSource(initDataSource());Resource resource = new ClassPathResource("myproject1/mybatis-config.xml");sqlSessionFactory.setConfigLocation(resource);return sqlSessionFactory;}//扫描器配置@Beanpublic MapperScannerConfigurer initMapperScannerConfigurer(){MapperScannerConfigurer msc = new MapperScannerConfigurer();msc.setBasePackage("myproject1.*");msc.setSqlSessionFactoryBeanName("sqlSessionFactory");msc.setAnnotationClass(Repository.class);return msc;}//redis 配置@Bean(name = "redisTemplate")public RedisTemplate initRedisTemplate(){JedisPoolConfig poolConfig =new JedisPoolConfig();poolConfig.setMaxIdle(50);poolConfig.setMaxTotal(100);poolConfig.setMaxWaitMillis(20000);JedisConnectionFactory connectionFactory = new JedisConnectionFactory(poolConfig);connectionFactory.setHostName("localhost");connectionFactory.setPort(6379);connectionFactory.afterPropertiesSet();RedisSerializer jdkSerializationRedisSerializer = new JdkSerializationRedisSerializer();RedisSerializer stringRedisSerializer = new StringRedisSerializer();RedisTemplate redisTemplate = new RedisTemplate();redisTemplate.setConnectionFactory(connectionFactory);redisTemplate.setDefaultSerializer(stringRedisSerializer);redisTemplate.setKeySerializer(stringRedisSerializer);redisTemplate.setHashValueSerializer(stringRedisSerializer);redisTemplate.setHashValueSerializer(stringRedisSerializer);return redisTemplate;}//配置事务管理器@Override@Bean(name="annotationDrivenTransactionManager")public PlatformTransactionManager annotationDrivenTransactionManager() {DataSourceTransactionManager transactionManager= new DataSourceTransactionManager();transactionManager.setDataSource(initDataSource());return transactionManager;}
}

三、建立WebConfig类

package myproject1.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.http.MediaType;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.scheduling.annotation.AsyncConfigurerSupport;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.HandlerAdapter;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executor;@Configuration  //标记这个配置类
@ComponentScan(value = "myproject1.*",includeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION,value = Controller.class)})
@EnableWebMvc
@EnableAsync
public class WebConfig extends AsyncConfigurerSupport {  //AsyncConfigurerSupport 是为了开启新线程才继承的，不用不需要//视图解析器配置@Bean(name = "internalResourceViewResolver")public ViewResolver initViewResolver(){InternalResourceViewResolver viewResolver=new InternalResourceViewResolver();viewResolver.setPrefix("WEB-INF/jsp/");viewResolver.setSuffix(".jsp");return viewResolver;}//数据转换器配置，例如把数据转化为json数据返回用户@Bean(name = "requestMapperingHandlerAdapter")public HandlerAdapter initRequestMappingHandleAdapter(){RequestMappingHandlerAdapter rmhd = new RequestMappingHandlerAdapter();MappingJackson2HttpMessageConverter jsonConverter = new MappingJackson2HttpMessageConverter();MediaType mediaType = MediaType.APPLICATION_JSON;List<MediaType> mediaTypes = new ArrayList<>();mediaTypes.add(mediaType);jsonConverter.setSupportedMediaTypes(mediaTypes);rmhd.getMessageConverters().add(jsonConverter);return rmhd;}public Executor getAsyncExecutor(){ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();taskExecutor.setCorePoolSize(5);taskExecutor.setMaxPoolSize(10);taskExecutor.setQueueCapacity(200);taskExecutor.initialize();return taskExecutor;}
}

四、mybatis-base.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration><settings><setting name="lazyLoadingEnabled" value ="true"/><setting name="aggressiveLazyLoading" value ="false"/></settings><mappers><mapper resource="myproject1/mapper/RedPacket.xml"/><mapper resource="myproject1/mapper/UserRedPacket.xml"/></mappers></configuration>

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spring基础--注解配置ssm开发环境

使用注解配置ssm开发环境，更容易理解spring原理实现及加载流程。以下是使用注解配置ssm开发环境步骤：

一、好比建房子先打地基，搭建ssm环境需要先配置最基本的内容：

二、根据上面的配置，建立RootConfig类：

三、建立WebConfig类

四、mybatis-base.xml:

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