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
@SpringBootApplication
public 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

@Controller
public 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8080
server.port=8080
#设置项目ContextPath
server.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=true
spring.datasource.username=root
spring.datasource.password=root
spring.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
@SpringBootApplication
public 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

Spring Boot + MyBatis 快速入门

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