spring boot 实践

时间:2024-01-14 08:41:02

二、实践

一些说明:

项目IDE采用Intellij(主要原因在于Intellij颜值完爆Eclipse,谁叫这是一个看脸的时代)

工程依赖管理采用个人比较熟悉的Maven(事实上SpringBoot与Groovy才是天生一对)

1.预览:

(1)github地址

https://github.com/djmpink/springboot-mybatis

git :  https://github.com/djmpink/springboot-mybatis.git

(2)完整项目结构

(3)数据库

数据库名:test

【user.sql】

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SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` int(11) NOT NULL,
  `name` varchar(255) DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  `password` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', '7player', '18', '123456');

2.Maven配置

完整的【pom.xml】配置如下:

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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>cn.7player.framework</groupId>
    <artifactId>springboot-mybatis</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.2.5.RELEASE</version>
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.7</java.version>
    </properties>
    <dependencies>
        <!--Spring Boot-->
            <!--支持 Web 应用开发,包含 Tomcat 和 spring-mvc。 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--模板引擎-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <!--支持使用 JDBC 访问数据库-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--添加适用于生产环境的功能,如性能指标和监测等功能。 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--Mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.2.8</version>
        </dependency>
        <!--Mysql / DataSource-->
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--Json Support-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.1.43</version>
        </dependency>
        <!--Swagger support-->
        <dependency>
            <groupId>com.mangofactory</groupId>
            <artifactId>swagger-springmvc</artifactId>
            <version>0.9.5</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    <repositories>
        <repository>
            <id>spring-milestone</id>
            <url>https://repo.spring.io/libs-release</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-milestone</id>
            <url>https://repo.spring.io/libs-release</url>
        </pluginRepository>
    </pluginRepositories>
</project>

3.主函数

【Application.java】包含main函数,像普通java程序启动即可。

此外,该类中还包含和数据库相关的DataSource,SqlSeesion配置内容。

注:@MapperScan(“cn.no7player.mapper”) 表示Mybatis的映射路径(package路径)

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package cn.no7player;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.log4j.Logger;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;
@EnableAutoConfiguration
@SpringBootApplication
@ComponentScan
@MapperScan("cn.no7player.mapper")
public class Application {
    private static Logger logger = Logger.getLogger(Application.class);
    //DataSource配置
    @Bean
    @ConfigurationProperties(prefix="spring.datasource")
    public DataSource dataSource() {
        return new org.apache.tomcat.jdbc.pool.DataSource();
    }
    //提供SqlSeesion
    @Bean
    public SqlSessionFactory sqlSessionFactoryBean() throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource());
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:/mybatis/*.xml"));
        return sqlSessionFactoryBean.getObject();
    }
    @Bean
    public PlatformTransactionManager transactionManager() {
        return new DataSourceTransactionManager(dataSource());
    }
    /**
     * Main Start
     */
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
        logger.info("============= SpringBoot Start Success =============");
    }
}

4.Controller

请求入口Controller部分提供三种接口样例:视图模板,Json,restful风格

(1)视图模板

返回结果为视图文件路径。视图相关文件默认放置在路径 resource/templates下:

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package cn.no7player.controller;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
@Controller
public class HelloController {
    private Logger logger = Logger.getLogger(HelloController.class);
    /*
    *   http://localhost:8080/hello?name=cn.7player
     */
    @RequestMapping("/hello")
    public String greeting(@RequestParam(value="name", required=false, defaultValue="World") String name, Model model) {
        logger.info("hello");
        model.addAttribute("name", name);
        return "hello";
    }
}

(2)Json

返回Json格式数据,多用于Ajax请求。

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package cn.no7player.controller;
import cn.no7player.model.User;
import cn.no7player.service.UserService;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class UserController {
    private Logger logger = Logger.getLogger(UserController.class);
    @Autowired
    private UserService userService;
    /*
     *  http://localhost:8080/getUserInfo
     */
    @RequestMapping("/getUserInfo")
    @ResponseBody
    public User getUserInfo() {
        User user = userService.getUserInfo();
        if(user!=null){
            System.out.println("user.getName():"+user.getName());
            logger.info("user.getAge():"+user.getAge());
        }
        return user;
    }
}

(3)restful

REST 指的是一组架构约束条件和原则。满足这些约束条件和原则的应用程序或设计就是 RESTful。

此外,有一款RESTFUL接口的文档在线自动生成+功能测试功能软件——Swagger UI,具体配置过程可移步《Spring Boot 利用 Swagger 实现restful测试》

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package cn.no7player.controller;
import cn.no7player.model.User;
import com.wordnik.swagger.annotations.ApiOperation;
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.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
@RestController
@RequestMapping(value="/users")
public class SwaggerController {
    /*
     *  http://localhost:8080/swagger/index.html
     */
    @ApiOperation(value="Get all users",notes="requires noting")
    @RequestMapping(method=RequestMethod.GET)
    public List<User> getUsers(){
        List<User> list=new ArrayList<User>();
        User user=new User();
        user.setName("hello");
        list.add(user);
        User user2=new User();
        user.setName("world");
        list.add(user2);
        return list;
    }
    @ApiOperation(value="Get user with id",notes="requires the id of user")
    @RequestMapping(value="/{name}",method=RequestMethod.GET)
    public User getUserById(@PathVariable String name){
        User user=new User();
        user.setName("hello world");
        return user;
    }
}

5.Mybatis

配置相关代码在Application.java中体现。

(1)【application.properties】

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spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=gbk&zeroDateTimeBehavior=convertToNull
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

注意,在Application.java代码中,配置DataSource时的注解

@ConfigurationProperties(prefix=“spring.datasource”)

表示将根据前缀“spring.datasource”从application.properties中匹配相关属性值。

(2)【UserMapper.xml】

Mybatis的sql映射文件。Mybatis同样支持注解方式,在此不予举例了。

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="cn.no7player.mapper.UserMapper">
  <select id="findUserInfo" resultType="cn.no7player.model.User">
    select name, age,password from user;
  </select>
</mapper>

(3)接口UserMapper

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package cn.no7player.mapper;
import cn.no7player.model.User;
public interface UserMapper {
    public User findUserInfo();
}

三、总结

(1)运行 Application.java

(2)控制台输出:

…..(略过无数内容)

(3)访问:

针对三种控制器的访问分别为:

视图:

http://localhost:8080/hello?name=7player

Json:

http://localhost:8080/getUserInfo

Restful(使用了swagger):

http://localhost:8080/swagger/index.html

四、参阅

《Spring Boot – Quick Start》

http://projects.spring.io/spring-boot/#quick-start

《mybatis》

http://mybatis.github.io/mybatis-3/

《使用 Spring Boot 快速构建 Spring 框架应用》

http://www.ibm.com/developerworks/cn/java/j-lo-spring-boot/

《Using @ConfigurationProperties in Spring Boot》

http://www.javacodegeeks.com/2014/09/using-configurationproperties-in-spring-boot.html?utm_source=tuicool

《Springboot-Mybatis-Mysample》

https://github.com/mizukyf/springboot-mybatis-mysample

《Serving Web Content with Spring MVC》

http://spring.io/guides/gs/serving-web-content/

《理解RESTful架构》

http://www.ruanyifeng.com/blog/2011/09/restful

附录:

Spring Boot 推荐的基础 POM 文件

名称

说明

spring-boot-starter

核心 POM,包含自动配置支持、日志库和对 YAML 配置文件的支持。

spring-boot-starter-amqp

通过 spring-rabbit 支持 AMQP。

spring-boot-starter-aop

包含 spring-aop 和 AspectJ 来支持面向切面编程(AOP)。

spring-boot-starter-batch

支持 Spring Batch,包含 HSQLDB。

spring-boot-starter-data-jpa

包含 spring-data-jpa、spring-orm 和 Hibernate 来支持 JPA。

spring-boot-starter-data-mongodb

包含 spring-data-mongodb 来支持 MongoDB。

spring-boot-starter-data-rest

通过 spring-data-rest-webmvc 支持以 REST 方式暴露 Spring Data 仓库。

spring-boot-starter-jdbc

支持使用 JDBC 访问数据库。

spring-boot-starter-security

包含 spring-security。

spring-boot-starter-test

包含常用的测试所需的依赖,如 JUnit、Hamcrest、Mockito 和 spring-test 等。

spring-boot-starter-velocity

支持使用 Velocity 作为模板引擎。

spring-boot-starter-web

支持 Web 应用开发,包含 Tomcat 和 spring-mvc。

spring-boot-starter-websocket

支持使用 Tomcat 开发 WebSocket 应用。

spring-boot-starter-ws

支持 Spring Web Services。

spring-boot-starter-actuator

添加适用于生产环境的功能,如性能指标和监测等功能。

spring-boot-starter-remote-shell

添加远程 SSH 支持。

spring-boot-starter-jetty

使用 Jetty 而不是默认的 Tomcat 作为应用服务器。

spring-boot-starter-log4j

添加 Log4j 的支持。

spring-boot-starter-logging

使用 Spring Boot 默认的日志框架 Logback。

spring-boot-starter-tomcat

使用 Spring Boot 默认的 Tomcat 作为应用服务器。

转自:http://7player.cn/2015/08/30/%E3%80%90%E5%8E%9F%E5%88%9B%E3%80%91%E5%9F%BA%E4%BA%8Espringboot-mybatis%E5%AE%9E%E7%8E%B0springmvc-web%E9%A1%B9%E7%9B%AE/

MVCMyBatisspringSpringBoot