所以我们现在离不开xml配置文件是因为我们有一处很关键的配置如果他要也能用注解配置那么我们就可以脱离xml文件了

1.2.1.jdbc配置

locationclasspath:db.properties/context:property-placeholder!--数据源--bean

iddataSource

classcom.alibaba.druid.pool.DruidDataSource

nameurl

classorg.mybatis.spring.SqlSessionFactoryBeanproperty

namedataSource

valuecom.by.pojo/property/bean!--配置MapperScan扫描mapper接口并把生成的代理类交给spring去管理--bean

classorg.mybatis.spring.mapper.MapperScannerConfigurerproperty

namebasePackage

valuecom.by.mapper/propertyproperty

valuesessionFactoryBean/property/bean1.2.3.transactional配置

bean

classorg.springframework.jdbc.datasource.DataSourceTransactionManagerproperty

namedataSource

transaction-managertransactionManager/1.2.4.service配置

!--扫描service--context:component-scan

base-packagecom.by.service/context:component-scan1.2.5.springmvc配置

!--配置springmvc要扫描的包--context:component-scan

base-packagecom.by.controller,com.by.exception/context:component-scan!--开启注解驱动配置handlerMapping和handlerAdapter--mvc:annotation-driven

conversion-servicecs/mvc:annotation-driven!--配置日期转换器--bean

idcs

classorg.springframework.context.support.ConversionServiceFactoryBeanproperty

classcom.by.converter.MyDateConverter/bean/set/property/bean!--配置视图解析器--bean

classorg.springframework.web.servlet.view.InternalResourceViewResolverproperty

nameprefix

value/WEB-INF/pages//propertyproperty

namesuffix

value.jsp/property/bean!--配置文件上传解析器--bean

idmultipartResolverclassorg.springframework.web.multipart.commons.CommonsMultipartResolverproperty

namemaxUploadSize

//bean!--资源映射器直接放行无须dispatcherServlet去处理--mvc:resources

location/head/

mapping/head/**/!--配置拦截器--mvc:interceptorsmvc:interceptormvc:mapping

path/account/**/mvc:exclude-mapping

path/account/login/mvc:exclude-mappingbean

classcom.by.interceptor.LoginInterceptor/bean/mvc:interceptor/mvc:interceptors1.2.6.servlet配置

!--配置监听器监听tomcat启动,加载spring配置文件--

context-paramparam-namecontextConfigLocation/param-nameparam-valueclasspath:applicationContext-*.xml/param-value

/context-param

listenerlistener-classorg.springframework.web.context.ContextLoaderListener/listener-class

/listener!--前端控制器--

servletservlet-namespringmvc/servlet-nameservlet-classorg.springframework.web.servlet.DispatcherServlet/servlet-classinit-paramparam-namecontextConfigLocation/param-nameparam-valueclasspath:springmvc.xml/param-value/init-paramload-on-startup1/load-on-startup

/servlet

servlet-mappingservlet-namespringmvc/servlet-nameurl-pattern//url-pattern

/servlet-mapping

filterfilter-nameCharacterEncodingFilter/filter-namefilter-classorg.springframework.web.filter.CharacterEncodingFilter/filter-classinit-paramparam-nameencoding/param-nameparam-valueUTF-8/param-value/init-param

/filter

filter-mappingfilter-nameCharacterEncodingFilter/filter-nameurl-pattern/*/url-pattern

2.1.Configuration

用于指定当前类是一个spring配置类可替换xml配置文件作用和在spring的xml配置文件中的beans/beans是一样的。

示例代码

Configuration//等价于beans当从一个类上加载到该注解时会创建spring容器

public

用于指定spring在初始化容器时要扫描的包。

作用和在spring的xml配置文件中的

basePackages用于指定要扫描的包。

和该注解中的value属性作用一样。

示例代码

com.by)//等价于context:component-scan

public

该注解只能写在方法上表明使用此方法创建一个对象并且放入spring容器。

作用和在spring的xml配置文件中的bean/是一样的。

name给当前Bean注解方法创建的对象指定一个名称(即bean的id。

示例代码

Dog();dog.setNam(二狗);dog.setAge(18);return

dog;

用于加载.properties文件中的配置。

作用和在spring的xml配置文件中的context:property-placeholder

value[]用于指定properties文件位置。

如果是在类路径下需要写上classpath:

示例代码

PropertySource(classpath:config.properties)

public

Dog();dog.setNam(nam);dog.setAge(age);return

dog;}

Import注解是用来导入配置类或者一些需要前置加载的类。

作用和在spring的xml配置文件中的import

示例代码

Import({Configuration_O***r.class})

public

{}PropertySource(classpath:config.properties)

public

com.alibaba.druid.pool.DruidDataSource;

import

org.springframework.beans.factory.annotation.Value;

import

org.springframework.context.annotation.Bean;

import

org.springframework.context.annotation.PropertySource;import

javax.sql.DataSource;PropertySource({classpath:db.properties})//context:property-placeholder/

public

driver;Value(${jdbc.url})private

String

url;Value(${jdbc.username})private

String

userName;Value(${jdbc.password})private

String

getDataSource(){DruidDataSource

dataSource

DruidDataSource();dataSource.setDriverClassName(driver);dataSource.setUrl(url);dataSource.setUsername(userName);dataSource.setPassword(password);return

dataSource;}

org.mybatis.spring.SqlSessionFactoryBean;

import

org.mybatis.spring.mapper.MapperScannerConfigurer;

import

org.springframework.context.annotation.Bean;import

import

{Bean(sessionFactoryBean)public

getSqlSessionFactoryBean(DataSource

dataSource){SqlSessionFactoryBean

sessionFactoryBean

SqlSessionFactoryBean();sessionFactoryBean.setDataSource(dataSource);return

getMapperScannerConfigurer(){MapperScannerConfigurer

new

MapperScannerConfigurer();mapperScannerConfigurer.setBasePackage(com.by.mapper);mapperScannerConfigurer.setSqlSessionFactoryBeanName(sessionFactoryBean);return

3.3.TxConfig

org.springframework.context.annotation.Bean;

import

org.springframework.jdbc.datasource.DataSourceTransactionManager;

import

org.springframework.transaction.PlatformTransactionManager;import

class

getPlatformTransactionManager(DataSource

dataSource){DataSourceTransactionManager

transactionManager

DataSourceTransactionManager();transactionManager.setDataSource(dataSource);return

transactionManager;}

org.springframework.context.annotation.ComponentScan;

import

org.springframework.context.annotation.Configuration;

import

org.springframework.context.annotation.Import;

import

org.springframework.transaction.annotation.EnableTransactionManagement;

Configuration

Import({DataSourceConfig.class,

MyBatisConfig.class,

com.by.converter.DateConverter;

import

com.by.interceptor.LoginInterceptor;

import

org.springframework.context.annotation.Bean;

import

org.springframework.context.annotation.ComponentScan;

import

org.springframework.context.annotation.Configuration;

import

org.springframework.format.FormatterRegistry;

import

org.springframework.web.multipart.commons.CommonsMultipartResolver;

import

org.springframework.web.servlet.config.annotation.EnableWebMvc;

import

org.springframework.web.servlet.config.annotation.InterceptorRegistry;

import

org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;

import

org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import

org.springframework.web.servlet.view.InternalResourceViewResolver;Configuration

ComponentScan({com.by.controller})

EnableWebMvc

getInternalResourceViewResolver(){InternalResourceViewResolver

viewResolver

InternalResourceViewResolver();viewResolver.setPrefix(/WEB-INF/pages/);viewResolver.setSuffix(.jsp);return

viewResolver;}Bean(multipartResolver)public

getCommonsMultipartResolver(){CommonsMultipartResolver

multipartResolver

CommonsMultipartResolver();multipartResolver.setMaxUploadSize(5242880);multipartResolver.setDefaultEncoding(UTF-8);return

multipartResolver;}Overridepublic

void

addInterceptors(InterceptorRegistry

registry)

LoginInterceptor()).addPathPatterns(/account/**).excludePathPatterns(/user/**);}Overridepublic

void

addFormatters(FormatterRegistry

registry)

DateConverter());}Overridepublic

void

addResourceHandlers(ResourceHandlerRegistry

registry)

{registry.addResourceHandler(/head/**).addResourceLocations(/head/);}

3.6.WebConfig

org.springframework.web.filter.CharacterEncodingFilter;

import

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

当类扩展了AbstractAnnotationConfigDispatcherServletlnitializer并将其部署到

Servlet容器时*

AbstractAnnotationConfigDispatcherServletInitializer

Class?[]

Class[]{ServiceConfig.class};}//加载SpringMVC配置类protected

Class?[]

Class[]{SpringmvcConfig.class};}//设置SpringMVC请求地址拦截规则protected

String[]

String[]{/};}//设置post请求中文乱码过滤器Overrideprotected

Filter[]

CharacterEncodingFilter();filter.setEncoding(utf-8);return

new

xmlnshttp://xmlns.jcp.org/xml/ns/javaeexmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://xmlns.jcp.org/xml/ns/javaee

http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsdversion4.0welcome-file-listwelcome-filelogin.jsp/welcome-file/welcome-file-list

/web-app3.9.测试

--------------------spring的注解--------------------

1、PropertySource

作用加载*.properties等价于context:property-placeholder/

2、Bean

作用指定spring要扫描的包等价于context:component-scan

4、Import