项目结构

一、新建动态web项目取名HelloSpringMVC

二、/WebContent/WEB-INF/lib下导入必要依赖库

commons-collections4-4.1.jar、commons-dbcp2-2.1.1.jar、commons-logging-1.2.jar

commons-pool2-2.4.3.jar、jstl-1.2.jar、mybatis-3.4.5.jar、mybatis-spring-1.3.1.jar

mysql-connector-java-5.1.44-bin.jar、spring-aop-4.3.12.RELEASE.jar

spring-aspects-4.3.12.RELEASE.jar、spring-beans-4.3.12.RELEASE.jar

spring-context-4.3.12.RELEASE.jar、spring-context-support-4.3.12.RELEASE.jar

spring-core-4.3.12.RELEASE.jar、spring-expression-4.3.12.RELEASE.jar

spring-instrument-4.3.12.RELEASE.jar、spring-instrument-tomcat-4.3.12.RELEASE.jar

spring-jdbc-4.3.12.RELEASE.jar、spring-jms-4.3.12.RELEASE.jar

spring-messaging-4.3.12.RELEASE.jar、spring-orm-4.3.12.RELEASE.jar

spring-oxm-4.3.12.RELEASE.jar、spring-test-4.3.12.RELEASE.jar、spring-tx-4.3.12.RELEASE.jar

spring-web-4.3.12.RELEASE.jar、spring-webmvc-4.3.12.RELEASE.jar

spring-webmvc-portlet-4.3.12.RELEASE.jar、spring-websocket-4.3.12.RELEASE.jar

三、WebInitializer(相当于web.xml)

package com.hello.annotation;

import javax.servlet.ServletContext;

import javax.servlet.ServletException;

import javax.servlet.ServletRegistration;

import org.springframework.web.WebApplicationInitializer;

import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;

import org.springframework.web.servlet.DispatcherServlet;

public class WebInitializer implements WebApplicationInitializer {

@Override

public void onStartup(ServletContext servletContext) throws ServletException {

// TODO 自动生成的方法存根

AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();

ctx.register(AnnoConfig.class);

ctx.setServletContext(servletContext);//新建WebApplicationContext,注册配置类,并将其和当前的servletContext关联

//ctx.setConfigLocation("/WEB-INF/spring/dispatcher-config.xml");

//注册sprigmvc的DispatcherServlet

ServletRegistration.Dynamic servlet = servletContext.addServlet("dispatcher",new DispatcherServlet(ctx));

servlet.addMapping("/");

servlet.setLoadOnStartup(1);

}

}

四、AnnoConfig(相当于application.xml)这里把数据源也配置了

package com.hello.annotation;

import javax.sql.DataSource;

import org.apache.commons.dbcp2.BasicDataSource;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.context.annotation.Configuration;

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.web.servlet.ViewResolver;

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

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

import org.springframework.web.servlet.view.JstlView;

@Configuration

@EnableWebMvc

@ComponentScan("com.hello.*")

public class AnnoConfig {

@Bean

public ViewResolver viewResolver() {

InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();

viewResolver.setViewClass(JstlView.class);

viewResolver.setPrefix("/WEB-INF/views/");

viewResolver.setSuffix(".jsp");

return viewResolver;

}

@Bean(name = "primaryDataSource")

public BasicDataSource dataSource() {

BasicDataSource ds = new BasicDataSource();

ds.setDriverClassName("com.mysql.jdbc.Driver");

ds.setUrl("jdbc:mysql://localhost:3306/test2?useSSL=false");

ds.setUsername("your-user");

ds.setPassword("your-passwd");

return ds;

}

@Bean(name = "primaryJdbcTemplate")

public JdbcTemplate primaryJdbcTemplate(

@Qualifier("primaryDataSource") DataSource dataSource) {

return new JdbcTemplate(dataSource);

}

}

五、控制类

package com.hello.controller;

import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;

import org.springframework.ui.ModelMap;

import org.springframework.web.bind.annotation.RequestMapping;

@Controller

public class HelloWorldController {

@RequestMapping("/")

public String sayHello(ModelMap model) {

model.addAttribute("greeting", "你好！ Spring 4 MVC");

return "welcome";

}

@RequestMapping("/login")

public String login(HttpSession session, String username, String password) throws Exception {

// 调用 service 层验证登录

// ...

// 模拟登录成功

session.setAttribute("username", username);

return "redirect:/u/list";

}

}

六、视图welcome.jsp(放在WEB-INF/views/下)

pageEncoding="UTF-8"%>

在此处插入标题

Greeting : ${greeting}

七、运行

八、JdbcTemplate访问数据库部分

IUser、User、UserRowMapper、UserRepository等类和接口完全参照SpringBoot的dao层、JdbcTemplate多数据源访问实例。这里只把包com.yiibai改为com.hello。

增加控制类Ucontroller也是参考SpringBoot的dao层、JdbcTemplate多数据源访问实例。但修改较大(用了ModelAndView)，具体内容如下：

package com.hello.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.servlet.ModelAndView;

import com.hello.mybatis.models.User;

import com.hello.mybatis.repositories.UserRepository;

@Controller

@RequestMapping("/u")

public class Ucontroller {

@Autowired

@Qualifier("primaryJdbcTemplate")

protected JdbcTemplate primaryJdbcTemplate;

@Autowired

private UserRepository userRepository;

@RequestMapping(value = "/list", method = {RequestMethod.POST, RequestMethod.GET})

public ModelAndView getUsers() {

List ulist=userRepository.findAll();

ModelAndView modelAndView = new ModelAndView("userslist");//转到/WEB-INF/views/userslist.jsp

//modelAndView.setViewName("userslist");

modelAndView.addObject("userslist", ulist);

return modelAndView;

}

}

这里要注意应该引入的是： org.springframework.web.servlet.ModelAndView;

而不是　org.springframework.web.portlet.ModelAndView,否则会出错。

视图userslist.jsp(也在WEB-INF/views/下)

pageEncoding="UTF-8"%>

在此处插入标题

编号	名字	部门	电话
${users.id}	${users.name}	${users.dept}	${users.phone}

运行：

http://localhost:8080/HelloSpringMVC/login

HelloWorldController中"/login"重定向到"/u/list",然后调用Ucontroller类中public ModelAndView getUsers()。

项目代码点击：下载

参考：