SSM基於javaconfig配置
1 項目結構（SSM+MAVEN）
1.1 目錄結構
1.2 POM文件
因爲倉庫是nexus私服，如碰見沒法加載的包，請無視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
首先建立一個初始化類，繼承AbstractAnnotationConfigDispatcherServletInitializer類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配置類初始化------");
return new Class<?>[] { RootConfig.class };
}
@Override
protected Class<?>[] getServletConfigClasses() {
LOG.info("------web配置類初始化------");
return new Class<?>[] { WebConfig.class };
}
@Override
protected String[] getServletMappings() {
// TODO Auto-generated method stub
LOG.info("------映射根路徑初始化------");
//return null;
return new String[] {"/"};// 請求路徑映射，將路徑映射到DispatcherServlet上
}
}
這裏繼承AbstractAnnotationConfigDispatcherServletInitializer 類，就會自動個地配置Dispatcher-Servlet和Spring上下文(傳統的方法是在web.xml中配置 DispatcherServlet)web
2.2 AbstractAnnotationConfigDispatcherServletInitializer剖析
Servlet3.0環境中，容器會在類路徑去查找實現javax.servlet.ServletContainerInitializer接口的類，若是發現，就用它作servlet的容器spring
Spring對這個接口進行了實現，爲SpringServletContainerInitializer。它( SpringServletContainerInitializer )會去查找實現了WebAppInitializer的類並將配置任務交給他們來完成。Spring3.2引入了便利的 WebAppInitializer 實現，就是AbstractAnnotationConfigDispatcherServletInitializer。因此當部署到Servlet3.0容器中時，容器會自動發現它，並配置servlet上下文sql
從新的三個方法也有對應註解，這裏再也不多說數據庫
2.3 WebConfig配置
當DispatcherServlet啓動的時候，會建立Spring應用上下文並加載配置文件或配置文件中聲明的bean。express
當它加載上下文時，使用定義在WebConfig中的bean(基於java配置)apache
DispatcherServlet 加載包含web組件的bean，如控制器，視圖解析器等。還有一個ContextLoaderListener加載其餘bean，如中間層及數據層組件等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;
/****
* 定義 DispatcherServlet 加載應用上下文的配置
*
* @author C
*
*/
@Configuration
@EnableWebMvc
@ComponentScan("com.ssm.controller") // 包掃描
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必須寫name屬性且必須爲multipartResolver
protected CommonsMultipartResolver multipartResolver() {
CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
commonsMultipartResolver.setMaxUploadSize(5 * 1024 * 1024);
commonsMultipartResolver.setMaxInMemorySize(0);
commonsMultipartResolver.setDefaultEncoding("UTF-8");
return commonsMultipartResolver;
}
// 靜態資源的處理
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
}
@Configuration：配置類api
@EnableWebMvc：至關於基於xml配置的<mvc:annotation-driven>啓用註解驅動
@ComponentScan：包掃描
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;
/***
* 主要配置持久層的一些東西，包括數據庫、Mybatis框架，事務之類的
*
* @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);
// 設置要建立代理的那些Bean的名字
autoProxyCreator.setBeanNames("*Service");
autoProxyCreator.setInterceptorNames("transactionInterceptor");
return autoProxyCreator;
}
}
這裏數據庫的事務配置方式有三種：
- 第一種在 RootConfig加上 @EnableTransactionManagement 註解，配置數據庫， 手動加上事務使用 @Transactional 註解，而且指定的傳播屬性，缺點麻煩
- 第二種使用 BeanNameAutoProxyCreator攔截代理方式
- 第三種是採用aop切面事務
4 DataSourceConfig
這裏因爲我用的1.7的JDK，@PropertySources會報錯，做爲學習，就直接將properties文件寫到類裏面了
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");// 別名，讓*Mpper.xml實體類映射能夠不加上具體包名
return sqlSessionFactoryBean;
}
// 事務管理器 對mybatis操做數據庫事務控制，spring使用jdbc的事務控制類
@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 測試
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訪問servlet
5.2訪問數據庫
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