Spring Boot + MyBatis 快速入门

这几天学习了下Spring Boot，想记录下来以备以后复习查看用。Spring Boot极度简化了以往XML配置的复杂繁琐，只需简单的几行配置就可以搭建一个Web工程，大大节省了开发时间。

环境准备

• Eclipse
• JDK 1.7
• Maven
• MySql

一个最简单的Web应用
首先新建一个Maven工程，下面是pom.xml的配置

<parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.4.1.RELEASE</version>    </parent>    <dependencies>        <!-- Spring Boot -->        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-test</artifactId>            <scope>test</scope>        </dependency>        <!-- MyBatis -->        <dependency>            <groupId>org.mybatis.spring.boot</groupId>            <artifactId>mybatis-spring-boot-starter</artifactId>            <version>1.1.1</version>        </dependency>        <!--启动时启动内置tomcat -->        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-tomcat</artifactId>        </dependency>        <!--对Jsp支持 -->        <dependency>            <groupId>org.apache.tomcat.embed</groupId>            <artifactId>tomcat-embed-jasper</artifactId>        </dependency>        <!-- 支持jstl -->        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>        <!-- MySql驱动 -->        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.21</version>        </dependency>    </dependencies>

然后新建一个Application.java

//此注解表示SpringBoot启动类@SpringBootApplicationpublic class Application {    private static Logger logger = Logger.getLogger(Application.class);    public static void main(String[] args) {        logger.info("=================开始成功=================");        SpringApplication.run(Application.class, args);        logger.info("=================启动成功=================");    }}

然后写一个Controller类

@Controllerpublic class IndexController {    private static Logger logger = Logger.getLogger(IndexController.class);    @RequestMapping("/")    @ResponseBody    public String index() {        logger.info("进入index方法");        return "Hello Spring Boot !";    }}

因为Spring Boot内置了Tomcat，这时我们从Application.java的main方法启动就可以启动Spring Boot的项目了。

这时我们的第一个Spring Boot项目就启动成功了，在浏览器输入http://localhost:8080/就可以访问到刚才Controller里面的Index方法了。

下面开始整合MyBatis，因为上面已经引入了Maven依赖，所以这里我们直接开始整合
在resources目录下新建config文件夹，新建application.properties配置文件

#设置Tomcat端口，默认8080server.port=8080#设置项目ContextPathserver.context-path=/#设置Tomcat编码server.tomcat.uri-encoding=UTF-8#设置视图解析器路径spring.mvc.view.prefix=/WEB-INF/views/#设置视图解析器后缀spring.mvc.view.suffix=.jsp#数据库配置spring.datasource.url=jdbc:mysql://localhost:3306/dd?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=truespring.datasource.username=rootspring.datasource.password=rootspring.datasource.driver-class-name=com.mysql.jdbc.Driver#配置.xml文件路径mybatis.mapper-locations=classpath:/com/dd/wx/mapper/*.xml#配置模型路径mybatis.type-aliases-package=com.dd.wx.model

附上工程结构，代码结构和普通SpringMVC工程结构一样

再Application.java方法中加上注解

//此注解表示动态扫描DAO接口所在包@MapperScan("com.dd.wx.dao")//此注解表示SpringBoot启动类@SpringBootApplicationpublic class Application {    private static Logger logger = Logger.getLogger(Application.class);    public static void main(String[] args) {        logger.info("=================开始成功=================");        SpringApplication.run(Application.class, args);        logger.info("=================启动成功=================");    }}

编写测试代码

@Autowired    private IUserService userService;    @RequestMapping("/getItem")    public String getItem(HttpServletRequest request) {        String id = request.getParameter("id");        logger.info("进入getItem方法,id:"+id);        User user = userService.getUser(id);        request.setAttribute("user", user);        return "/item";    }

在WEB-INF/views/下新建item.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html>    <head>        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">        <title>详情</title>    </head>    <body>        获取成功：${user.name }    </body></html>

启动工程。访问http://localhost:8080/getItem?id=1

数据库数据

这时Spring Boot + MyBatis的项目就搭建好了。
源码地址：http://download.csdn.net/download/qq_17029285/10150551