SSM基于javaconfig配置
1 项目结构（SSM+MAVEN）
1.1 目录结构
1.2 POM文件
由于仓库是nexus私服，如遇见无法加载的包，请无视
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.testgroupId>
<artifactId>ssmTestartifactId>
<packaging>warpackaging>
<version>0.0.1-SNAPSHOTversion>
<name>ssmTest Maven Webappname>
<url>http://maven.apache.orgurl>
<dependencies>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>3.8.1version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.apache.xmlbeansgroupId>
<artifactId>xmlbeansartifactId>
<version>2.6.0version>
dependency>
<dependency>
<groupId>org.apache.poigroupId>
<artifactId>poi-ooxml-schemasartifactId>
<version>3.16version>
dependency>
<dependency>
<groupId>org.apache.poigroupId>
<artifactId>poi-ooxmlartifactId>
<version>3.16version>
dependency>
<dependency>
<groupId>org.apache.poigroupId>
<artifactId>poiartifactId>
<version>3.16version>
dependency>
<dependency>
<groupId>org.apache.commonsgroupId>
<artifactId>commons-collections4artifactId>
<version>4.1version>
dependency>
<dependency>
<groupId>javax.websocketgroupId>
<artifactId>javax.websocket-apiartifactId>
<version>1.1version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-websocketartifactId>
<version>4.0.5.RELEASEversion>
dependency>
<dependency>
<groupId>jstlgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>2.2.3version>
dependency>
<dependency>
<groupId>com.google.code.gsongroupId>
<artifactId>gsonartifactId>
<version>2.2.4version>
dependency>
<dependency>
<groupId>net.sf.ezmorphgroupId>
<artifactId>ezmorphartifactId>
<version>1.0.4version>
dependency>
<dependency>
<groupId>jcifsgroupId>
<artifactId>jcifsartifactId>
<version>1.3.17version>
dependency>
<dependency>
<groupId>commons-beanutilsgroupId>
<artifactId>commons-beanutilsartifactId>
<version>1.7.0version>
dependency>
<dependency>
<groupId>commons-collectionsgroupId>
<artifactId>commons-collectionsartifactId>
<version>3.2.2version>
dependency>
<dependency>
<groupId>net.sf.json-libgroupId>
<artifactId>json-lib-ext-springartifactId>
<version>1.0.2version>
dependency>
<dependency>
<groupId>log4jgroupId>
<artifactId>log4jartifactId>
<version>1.2.17version>
dependency>
<dependency>
<groupId>commons-langgroupId>
<artifactId>commons-langartifactId>
<version>2.6version>
dependency>
<dependency>
<groupId>commons-iogroupId>
<artifactId>commons-ioartifactId>
<version>2.0.1version>
dependency>
<dependency>
<groupId>commons-fileuploadgroupId>
<artifactId>commons-fileuploadartifactId>
<version>1.2.2version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>1.2.0version>
dependency>
<dependency>
<groupId>commons-dbcpgroupId>
<artifactId>commons-dbcpartifactId>
<version>1.4version>
dependency>
<dependency>
<groupId>commons-poolgroupId>
<artifactId>commons-poolartifactId>
<version>1.5.6version>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjweaverartifactId>
<version>1.6.11version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.2.2version>
dependency>
<dependency>
<groupId>org.mybatis.generatorgroupId>
<artifactId>mybatis-generatorartifactId>
<version>1.3.5version>
<type>pomtype>
dependency>
<dependency>
<groupId>org.mybatis.generatorgroupId>
<artifactId>mybatis-generator-coreartifactId>
<version>1.3.5version>
dependency>
<dependency>
<groupId>commons-logginggroupId>
<artifactId>commons-loggingartifactId>
<version>1.1.2version>
dependency>
<dependency>
<groupId>javax.servlet.jspgroupId>
<artifactId>jsp-apiartifactId>
<version>2.2version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>servlet-apiartifactId>
<version>2.5version>
dependency>
<dependency>
<groupId>aopalliancegroupId>
<artifactId>aopallianceartifactId>
<version>1.0version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aopartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aspectsartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-beansartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-context-supportartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-coreartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-expressionartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-txartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webartifactId>
<version>4.2.5.RELEASEversion>
dependency>
<dependency>
<groupId>org.apache.commonsgroupId>
<artifactId>commons-pool2artifactId>
<version>2.2version>
dependency>
<dependency>
<groupId>org.codehaus.jacksongroupId>
<artifactId>jackson-core-aslartifactId>
<version>1.9.11version>
dependency>
<dependency>
<groupId>org.codehaus.jacksongroupId>
<artifactId>jackson-mapper-aslartifactId>
<version>1.9.11version>
dependency>
<dependency>
<groupId>net.sf.json-libgroupId>
<artifactId>json-libartifactId>
<version>2.3version>
<classifier>jdk15classifier>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.20version>
dependency>
<dependency>
<groupId>javax.mailgroupId>
<artifactId>mailartifactId>
<version>1.4.3version>
dependency>
<dependency>
<groupId>commons-netgroupId>
<artifactId>commons-netartifactId>
<version>3.3version>
dependency>
<dependency>
<groupId>commons-codecgroupId>
<artifactId>commons-codecartifactId>
<version>1.10version>
dependency>
dependencies>
<build>
<finalName>ssmTestfinalName>
build>
project>
2 配置SPRINGMVC
2.1 初始化
首先创建一个初始化类，继承AbstractAnnotationConfigDispatcherServletInitializer类
package com.ssm.config;
import org.apache.log4j.Logger;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
/**
*
* @author C
*
*/
public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
private final static Logger LOG = Logger.getLogger(WebAppInitializer.class);
@Override
protected Class[] getRootConfigClasses() {
// TODO Auto-generated method stub
LOG.info("------root配置类初始化------");
return new Class[] { RootConfig.class };
}
@Override
protected Class[] getServletConfigClasses() {
LOG.info("------web配置类初始化------");
return new Class[] { WebConfig.class };
}
@Override
protected String[] getServletMappings() {
// TODO Auto-generated method stub
LOG.info("------映射根路径初始化------");
//return null;
return new String[] {"/"};// 请求路径映射，将路径映射到DispatcherServlet上
}
}
这里继承AbstractAnnotationConfigDispatcherServletInitializer 类，就会自动个地配置Dispatcher-Servlet和Spring上下文(传统的方法是在web.xml中配置 DispatcherServlet)
2.2 AbstractAnnotationConfigDispatcherServletInitializer剖析
Servlet3.0环境中，容器会在类路径去查找实现javax.servlet.ServletContainerInitializer接口的类，如果发现，就用它做servlet的容器
Spring对这个接口进行了实现，为SpringServletContainerInitializer。它( SpringServletContainerInitializer )会去查找实现了WebAppInitializer的类并将配置任务交给他们来完成。Spring3.2引入了便利的 WebAppInitializer 实现，就是AbstractAnnotationConfigDispatcherServletInitializer。所以当部署到Servlet3.0容器中时，容器会自动发现它，并配置servlet上下文
重新的三个方法也有对应注解，这里不再多说
2.3 WebConfig配置
当DispatcherServlet启动的时候，会创建Spring应用上下文并加载配置文件或配置文件中声明的bean。
当它加载上下文时，使用定义在WebConfig中的bean(基于java配置)
DispatcherServlet 加载包含web组件的bean，如控制器，视图解析器等。还有一个ContextLoaderListener加载其他bean，如中间层及数据层组件等
package com.ssm.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
/****
* 定义 DispatcherServlet 加载应用上下文的配置
*
* @author C
*
*/
@Configuration
@EnableWebMvc
@ComponentScan("com.ssm.controller") // 包扫描
public class WebConfig extends WebMvcConfigurerAdapter{
@Bean
public ViewResolver viewResolver() {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/jsp");
resolver.setSuffix(".jsp");
return resolver;
}
@Bean(name = "multipartResolver") // bean必须写name属性且必须为multipartResolver
protected CommonsMultipartResolver multipartResolver() {
CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
commonsMultipartResolver.setMaxUploadSize(5 * 1024 * 1024);
commonsMultipartResolver.setMaxInMemorySize(0);
commonsMultipartResolver.setDefaultEncoding("UTF-8");
return commonsMultipartResolver;
}
// 静态资源的处理
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
}
@Configuration：配置类
@EnableWebMvc：相当于基于xml配置的
@ComponentScan：包扫描
3 RootConfig配置
package com.ssm.config;
import org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
/***
* 主要配置持久层的一些东西，包括数据库、Mybatis框架，事务之类的
*
* @author C
*
*/
@Configuration
@ComponentScan(basePackages = { "com.ssm.config", "com.ssm.service.impl" })
@Import(DataSourceConfig.class)
public class RootConfig {
@Bean
public BeanNameAutoProxyCreator autoProxyCreator() {
BeanNameAutoProxyCreator autoProxyCreator = new BeanNameAutoProxyCreator();
autoProxyCreator.setProxyTargetClass(true);
// 设置要创建代理的那些Bean的名字
autoProxyCreator.setBeanNames("*Service");
autoProxyCreator.setInterceptorNames("transactionInterceptor");
return autoProxyCreator;
}
}
这里数据库的事务配置方式有三种：
- 第一种在 RootConfig加上 @EnableTransactionManagement 注解，配置数据库， 手动加上事务使用 @Transactional 注解，并且指定的传播属性，缺点麻烦
- 第二种使用 BeanNameAutoProxyCreator拦截代理方式
- 第三种是采用aop切面事务
4 DataSourceConfig
这里由于我用的1.7的JDK，@PropertySources会报错，作为学习，就直接将properties文件写到类里面了
package com.ssm.config;
import java.io.IOException;
import java.util.Properties;
import org.apache.commons.dbcp.BasicDataSource;
import org.apache.log4j.Logger;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
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;
import org.springframework.context.annotation.PropertySources;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.interceptor.TransactionInterceptor;
@Configuration
/*@PropertySources(value = { @PropertySource("classpath:db.properties") }) */
@MapperScan("com.ssm.mapper")
public class DataSourceConfig {
private final static Logger LOG = Logger.getLogger(DataSourceConfig.class);
private String driver = "com.mysql.jdbc.Driver";;
private String url = "jdbc:mysql://127.0.0.1:3306/test?characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true&autoReconnect=true";
private String username = "root";
private String password = "root";
@Bean
public BasicDataSource dataSource() {
LOG.info("Initialize the BasicDataSource...");
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName(driver);
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
return dataSource;
}
// mybatis的配置
@Bean
public SqlSessionFactoryBean sqlSessionFactoryBean() throws IOException {
ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource());
sqlSessionFactoryBean.setMapperLocations(resourcePatternResolver.getResources("classpath*:mappers/*.xml"));
sqlSessionFactoryBean.setTypeAliasesPackage("com.ssm.mapper");// 别名，让*Mpper.xml实体类映射可以不加上具体包名
return sqlSessionFactoryBean;
}
// 事务管理器 对mybatis操作数据库事务控制，spring使用jdbc的事务控制类
@Bean(name = "transactionManager")
public DataSourceTransactionManager dataSourceTransactionManager() {
DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
dataSourceTransactionManager.setDataSource(dataSource());
return dataSourceTransactionManager;
}
@Bean(name = "transactionInterceptor")
public TransactionInterceptor interceptor() {
TransactionInterceptor interceptor = new TransactionInterceptor();
interceptor.setTransactionManager(dataSourceTransactionManager());
Properties transactionAttributes = new Properties();
transactionAttributes.setProperty("save*", "PROPAGATION_REQUIRED");
transactionAttributes.setProperty("del*", "PROPAGATION_REQUIRED");
transactionAttributes.setProperty("update*", "PROPAGATION_REQUIRED");
transactionAttributes.setProperty("get*", "PROPAGATION_REQUIRED,readOnly");
transactionAttributes.setProperty("find*", "PROPAGATION_REQUIRED,readOnly");
transactionAttributes.setProperty("*", "PROPAGATION_REQUIRED");
interceptor.setTransactionAttributes(transactionAttributes);
return interceptor;
}
}
5 测试
package com.ssm.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.ssm.service.IndexService;
import com.sun.mail.handlers.image_gif;
@RestController
public class IndexController {
@Autowired
private IndexService indexService;
@RequestMapping("index")
public String index() {
return "THIS IS A TEST.WELCOME";
}
@RequestMapping("getData")
public String getData() {
return indexService.findUser();
}
}
5.1访问servlet
5.2访问数据库
