https://www.bilibili.com/video/av47953244
17.RequestParam注解：
18.RequestBody注解：
body代表你提交的整个内容
21.RequestHeader
23.ModelAttribute注解
24.SessionAttribute
26.
27.响应返回值是void类型
默认会返回一个testVoid值，跳转到testVoid.jsp页面，类似于返回success情况
28.响应返回值是ModelAndView类型
29.forward和redirect
return为固定写法，forward代表的是转发，redirect代表重定向，后面接要跳转的页面的路径
就是说想要实现重定向或者转发，只需要return的一个想要跳转的路径字符串即可
30.响应json数据之过滤静态资源
文件上传：
springmvc方式上传原理
40.
42.SpringMVC拦截器
预处理，controller方法执行前
后处理，controller方法执行后页面跳转前
页面跳转前
springmvc.xml文件配置拦截器
==========================================================================================
46.ssm整合
配置spring：
1.项目的pom.xml文件中引入坐标依赖
2.main目录下面创建java.itcast文件夹，创建resources文件夹，右键Mark Directory as第一个、第三个
3.resources文件夹下创建applicationContext.xml
applicationContext.xml：
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!--开启注解的扫描，希望处理service和dao，controller不需要Spring框架去处理--> <context:component-scan base-package="cn.itcast" > <!--配置哪些注解不扫描--> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!--Spring整合MyBatis框架--> <!--配置连接池--> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="com.mysql.jdbc.Driver"/> <property name="jdbcUrl" value="jdbc:mysql:///ssm"/> <property name="user" value="root"/> <property name="password" value="数据库密码"/> </bean> <!--配置SqlSessionFactory工厂--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> </bean> <!--配置AccountDao接口所在包--> <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="cn.itcast.dao"/> </bean> <!--配置Spring框架声明式事务管理--> <!--配置事务管理器--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!--配置事务通知--> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="find*" read-only="true"/> <tx:method name="*" isolation="DEFAULT"/> </tx:attributes> </tx:advice> <!--配置AOP增强--> <aop:config> <aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.itcast.service.impl.*ServiceImpl.*(..))"/> </aop:config> </beans>4.java文件夹下面新建domain文件夹，新建Account实体类，编写和数据库表属性一样的属性，创建set、get方法，创建toString方法
5.java文件夹下面新建dao文件夹，新建AccountDao接口，创建想要实现的功能的方法
6.java文件夹下面新建service文件夹，编写AccountService接口，创建impl文件夹，新建AccountServiceImpl实现类，实现AccountService接口，类上添加@Service("accountService")
---------------------------------------------------------------------------------------------------------------------------------------------------------
配置springmvc：
1. 在web.xml中配置DispatcherServlet前端控制器 <!-- 配置前端控制器：服务器启动必须加载，需要加载springmvc.xml配置文件 --> <servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 配置初始化参数，创建完DispatcherServlet对象，加载springmvc.xml配置文件 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <!-- 服务器启动的时候，让DispatcherServlet对象创建 --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> 2. 在web.xml中配置DispatcherServlet过滤器解决中文乱码 <!-- 配置解决中文乱码的过滤器 --> <filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> 3. 创建springmvc.xml的配置文件，编写配置文件 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 扫描controller的注解，别的不扫描 --> <context:component-scan base-package="cn.itcast"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 配置视图解析器 --> <bean id="viewResolver class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- JSP文件所在的目录 --> <property name="prefix" value="/WEB-INF/pages/" /> <!-- 文件的后缀名 --> <property name="suffix" value=".jsp" /> </bean> <!-- 设置静态资源不过滤 --> <mvc:resources location="/css/" mapping="/css/**" /> <mvc:resources location="/images/" mapping="/images/**" /> <mvc:resources location="/js/" mapping="/js/**" /> <!-- 开启对SpringMVC注解的支持 --> <mvc:annotation-driven /> </beans> 4. 测试SpringMVC的框架搭建是否成功 1. 编写index.jsp和list.jsp编写，超链接 <a href="account/findAll">查询所有</a> 2. 创建AccountController类，编写方法，进行测试 package cn.itcast.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller @RequestMapping("/account") public class AccountController { /** * 查询所有的数据 * @return */ @RequestMapping("/findAll") public String findAll() { System.out.println("表现层：查询所有账户..."); return "list"; } }
----------------------------------------------------------------------------------------------------------------------------
spring整合springmvc：
目的：在controller中能成功的调用service对象中的方法
1.在项目启动的时候就加载applicationContext.xml的配置文件，在web.xml中配置ContextLoaderListener监听器（该监听器只能加载WEB-INF目录下的applicationContext.xml的配置文件） <!-- 配置Spring的监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listenerclass> </listener> <!-- 配置加载类路径的配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> 2.在controller中注入service对象，调用service对象的方法进行测试
package cn.itcast.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import cn.itcast.service.AccountService; @Controller @RequestMapping("/account") public class AccountController { @Autowired private AccountService accoutService; /** * 查询所有的数据 * @return */ @RequestMapping("/findAll") public String findAll() { System.out.println("表现层：查询所有账户..."); accoutService.findAll(); return "list"; } } ---------------------------------------------------------------------------------------------------------------------------------------------------------------------
MyBatis配置：
1.resources包下创建SqlMapConfig.xml配置文件
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <environments default="mysql"> <environment id="mysql"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql:///ssm"/> <property name="username" value="root"/> <property name="password" value="root"/> </dataSource> </environment> </environments> <!-- 使用的是注解 --> <mappers> <!-- <mapper class="cn.itcast.dao.AccountDao"/> --> <!-- 该包下所有的dao接口都可以使用 --> <package name="cn.itcast.dao"/> </mappers> </configuration> 2.在AccountDao接口的方法上添加注解，编写SQL语句
package cn.itcast.dao; import java.util.List; import org.apache.ibatis.annotations.Insert; import org.apache.ibatis.annotations.Select; import cn.itcast.domain.Account; public interface AccountDao { @Insert(value="insert into account (name,money) values (#{name},#{money})") public void saveAccount(Account account); @Select("select * from account") public List<Account> findAll(); } 3.编写测试的方法
package cn.itcast.test; import java.io.InputStream; import java.util.List; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.junit.Test; import cn.itcast.dao.AccountDao; import cn.itcast.domain.Account; public class Demo1 { @Test public void run1() throws Exception { // 加载配置文件 InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml"); // 创建工厂 SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream); // 创建sqlSession对象 SqlSession session = factory.openSession(); // 获取代理对象 AccountDao dao = session.getMapper(AccountDao.class); // 调用查询的方法 List<Account> list = dao.findAll(); for (Account account : list) { System.out.println(account); } / / 释放资源 session.close(); inputStream.close(); } @ Test public void run2() throws Exception { Account account = new Account(); account.setName("熊大"); account.setMoney(400d); // 加载配置文件 InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml"); // 创建工厂 SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream); // 创建sqlSession对象 SqlSession session = factory.openSession(); // 获取代理对象 AccountDao dao = session.getMapper(AccountDao.class); dao.saveAccount(account); // 提交事务 session.commit(); // 释放资源 session.close(); inputStream.close(); } } --------------------------------------------------------------------------------------------------------------------------------------------------------------
spring整合MyBatis:
1.把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中
<!-- 配置C3P0的连接池对象 --> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql:///ssm" /> <property name="username" value="root" /> <property name="password" value="root" /> </bean> <!-- 配置SqlSession的工厂 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 配置扫描dao的包 --> <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="cn.itcast.dao"/> </bean> 2. 在AccountDao接口中添加@Repository注解 3. 在service中注入dao对象，进行测试 package cn.itcast.dao; import java.util.List; import org.apache.ibatis.annotations.Insert; import org.apache.ibatis.annotations.Select; import org.springframework.stereotype.Repository; import cn.itcast.domain.Account; @Repository public interface AccountDao { @Insert(value="insert into account (name,money) values (#{name},#{money})") public void saveAccount(Account account); @Select("select * from account") public List<Account> findAll(); } package cn.itcast.service.impl; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import cn.itcast.dao.AccountDao; import cn.itcast.domain.Account; import cn.itcast.service.AccountService; @Service("accountService") public class AccountServiceImpl implements AccountService { @Autowired private AccountDao accountDao; public void saveAccount(Account account) { } p ublic List<Account> findAll() { System.out.println("业务层：查询所有账户..."); return accountDao.findAll(); } }
AccountController类：
package cn.itcast.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import cn.itcast.domain.Account; import cn.itcast.service.AccountService; @Controller @RequestMapping("/account") public class AccountController { @Autowired private AccountService accoutService; /** * 查询所有的数据 * @return */ @RequestMapping("/findAll") public String findAll() { System.out.println("表现层：查询所有账户..."); List<Account> list = accoutService.findAll(); for (Account account : list) { System.out.println(account); } r eturn "list"; } } 整合完成。
页面点击链接，首先调用controller的类（AccountController类组合了AccountService（自动注入）），再调用service的类（AccountServiceImpl），然后调用dao的类（AccountServiceImpl类组合了AccountDao（自动注入））。
