SSM基于javaconfig配置
1 项目结构（SSM+MAVEN）
1.1 目录结构
1.2 POM文件
因为仓库是nexus私服，如碰见没法加载的包，请无视java
<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>4.0.0</modelVersion> <groupId>com.test</groupId> <artifactId>ssmTest</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>ssmTest Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.xmlbeans</groupId> <artifactId>xmlbeans</artifactId> <version>2.6.0</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml-schemas</artifactId> <version>3.16</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.16</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.16</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-collections4</artifactId> <version>4.1</version> </dependency> <dependency> <groupId>javax.websocket</groupId> <artifactId>javax.websocket-api</artifactId> <version>1.1</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-websocket</artifactId> <version>4.0.5.RELEASE</version> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.2.3</version> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.2.4</version> </dependency> <dependency> <groupId>net.sf.ezmorph</groupId> <artifactId>ezmorph</artifactId> <version>1.0.4</version> </dependency> <dependency> <groupId>jcifs</groupId> <artifactId>jcifs</artifactId> <version>1.3.17</version> </dependency> <dependency> <groupId>commons-beanutils</groupId> <artifactId>commons-beanutils</artifactId> <version>1.7.0</version> </dependency> <dependency> <groupId>commons-collections</groupId> <artifactId>commons-collections</artifactId> <version>3.2.2</version> </dependency> <dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib-ext-spring</artifactId> <version>1.0.2</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.0.1</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.2.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.0</version> </dependency> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>commons-pool</groupId> <artifactId>commons-pool</artifactId> <version>1.5.6</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.11</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.2.2</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator</artifactId> <version>1.3.5</version> <type>pom</type> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.5</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.2</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>aopalliance</groupId> <artifactId>aopalliance</artifactId> <version>1.0</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.2.5.RELEASE</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-core-asl</artifactId> <version>1.9.11</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.11</version> </dependency> <dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib</artifactId> <version>2.3</version> <classifier>jdk15</classifier> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.20</version> </dependency> <dependency> <groupId>javax.mail</groupId> <artifactId>mail</artifactId> <version>1.4.3</version> </dependency> <dependency> <groupId>commons-net</groupId> <artifactId>commons-net</artifactId> <version>3.3</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.10</version> </dependency> </dependencies> <build> <finalName>ssmTest</finalName> </build> </project>
2 配置SPRINGMVC
2.1 初始化
首先建立一个初始化类，继承AbstractAnnotationConfigDispatcherServletInitializer类mysql
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)web
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，若是发现，就用它作servlet的容器spring
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。因此当部署到Servlet3.0容器中时，容器会自动发现它，并配置servlet上下文sql
从新的三个方法也有对应注解，这里再也不多说数据库
2.3 WebConfig配置
当DispatcherServlet启动的时候，会建立Spring应用上下文并加载配置文件或配置文件中声明的bean。express
当它加载上下文时，使用定义在WebConfig中的bean(基于java配置)apache
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加载其余bean，如中间层及数据层组件等json
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api
@EnableWebMvc：至关于基于xml配置的<mvc:annotation-driven>启用注解驱动
@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);
// 设置要建立代理的那些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，而且指定的传播属性，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
这里因为我用的1.7的JDK，@PropertySources会报错，做为学习，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实体类映射能够不加上具体包名
return sqlSessionFactoryBean;
}
// 事务管理器 对mybatis操做数据库事务控制，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
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