①导入的jar包:
②在src下创建并配置applicationcontext.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"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"><!--配置DataSource的bean对象：存储数据库连接参数--><bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"><property name="url" value="jdbc:mysql://localhost:3306/spring4?characterEncoding=utf8"></property><property name="driverClassName" value="com.mysql.jdbc.Driver"></property><property name="username" value="root"></property><property name="password" value="root"></property></bean><!--配置SQLSessionFactory的bean对象：生产SQLSession--><bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="datasource"></property></bean><!--配置Mapper扫描的bean对象：使用SQLSession扫描mapper包获取Mapper接口的实例化对象--><bean id="a" class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="sqlSessionFactory" ref="factory"></property><property name="basePackage" value="com.java.mapper"></property></bean><!--配置service对象--><bean id="us" class="com.java.service.UserServiceImpl"><property name="um" ref="userMapper"></property></bean>
</beans>
③在web.xml文件中配置Spring容器对象的配置文件路径
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"version="3.0"><!--配置全局参数：被项目中所有servlet共享--><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationcontext.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>
</web-app>
④在Servlet的init方法中完成初始化资源的加载(从Spring容器对象中获取业务层对象)
package com.java.controller;import com.java.pojo.User;
import com.java.service.UserService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.request.async.WebAsyncUtils;
import org.springframework.web.context.support.WebApplicationContextUtils;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;@WebServlet(value = "/user", loadOnStartup = 1)
public class UserServlet extends HttpServlet {UserService userService;//在初始化方法中完成Spring容器资源的加载@Overridepublic void init() throws ServletException {//获取spring容器对象ApplicationContext ac = WebApplicationContextUtils.getWebApplicationContext(this.getServletContext());//获取业务层对象userService = (UserService) ac.getBean("us");}@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {req.setCharacterEncoding("utf-8");resp.setContentType("text/html;charset=utf-8");resp.setCharacterEncoding("utf-8");String uname = req.getParameter("uname");String pwd = req.getParameter("pwd");//处理请求//调用业务层方法User user = userService.userLoginService(uname, pwd);//响应结果//直接响应if (user != null) {resp.getWriter().write("登录成功");} else {resp.getWriter().write("登录失败");}}
}
⑤在业务层中声明mapper层的属性,并声明对应的get/set方法
package com.bjsxt.service;
import com.bjsxt.mapper.UserMapper;
import com.bjsxt.pojo.User;public class UserServiceImpl implements UserService{private UserMapper um;public UserMapper getUm() {return um;}public void setUm(UserMapper um) {this.um = um;}@Overridepublic User userLoginService(String uname, String pwd) {User user = um.userLoginMapper(uname, pwd);return user;}
}
