SpringBoot 使用yml配置 mybatis+pagehelper+druid+freemarker實例

SpringBoot 使用yml配置 mybatis+pagehelper+druid+freemarker實例

這是一個簡單的SpringBoot整合實例

這里是項目的結構目錄

首先是pom.xml

---

<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>Ming</groupId>
  <artifactId>SpringBoot</artifactId>
  <version>0.0.1-SNAPSHOT</version>

   <!-- Spring Boot 啟動父依賴 -->
  <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.5.4.RELEASE</version>
  </parent>

  <properties>
      <mybatis-spring-boot>1.2.0</mybatis-spring-boot>
      <mysql-connector>5.1.39</mysql-connector>
      <druid>1.0.18</druid>
      <java.version>1.8</java.version>
  </properties>

  <dependencies>

       <!-- Spring Boot Web 依賴 -->
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-web</artifactId>
       </dependency>

       <!-- Spring Boot Mybatis 依賴 -->
       <dependency>
           <groupId>org.mybatis.spring.boot</groupId>
           <artifactId>mybatis-spring-boot-starter</artifactId>
           <version>1.1.1</version>
       </dependency>

       <!-- MySQL 連接驅動依賴 -->
       <dependency>
           <groupId>mysql</groupId>
           <artifactId>mysql-connector-java</artifactId>
           <version>${mysql-connector}</version>
       </dependency>

       <!-- Druid 數據連接池依賴 -->
       <dependency>
           <groupId>com.alibaba</groupId>
           <artifactId>druid</artifactId>
           <version>${druid}</version>
       </dependency>

       <!-- 分頁插件 -->  
       <dependency>  
           <groupId>com.github.pagehelper</groupId>  
           <artifactId>pagehelper</artifactId>  
           <version>4.1.6</version>  
       </dependency>  

       <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
       </dependency>        
   </dependencies>

</project>

接着在src/main/resources目錄下新建一個application.yml文件

server:
  port: 8080

logging:
  level: 
    learning: trace

spring:
  #數據源配置
  datasource:
    url: jdbc:mysql://localhost:3306/test
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    connectionProperties: druid.stat.mergeSql=true
  #模板引擎
  freemarker:
    #關閉緩存
    cache: false
    request-context-attribute: request
    #模板加載的位置
    template-loader-path: classpath:/templates
    #前綴
    suffix: .htm
    #后綴
    prefix: /htm/

mybatis:
  #實體類所做包
  type-aliases-package: learning.model
  #mapper.xml所在位置
  mapper-locations: classpath:mappers/*.xml

在conf包下新建一個MybatisConfig類以配置使用PageHelper分頁
代碼如下

@Configuration
public class MybatisConfig {
    @Bean
    public PageHelper pageHelper(){
        PageHelper pageHelper = new PageHelper();  
        //添加配置，也可以指定文件路徑
        Properties p = new Properties();
        p.setProperty("offsetAsPageNum", "true");
        p.setProperty("rowBoundsWithCount", "true");
        p.setProperty("reasonable", "true");
        pageHelper.setProperties(p);
        return pageHelper;
    }
}

接着就可以編寫實例類

public class Player {
    private Integer id;
    private String name;
    private Double points;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Double getPoints() {
        return points;
    }
    public void setPoints(Double points) {
        this.points = points;
    }
}

dao接口

public interface PlayerDao {
    void save (Player player);

    Player findByKey(Integer id);

    List<Player> findAll();
}

service接口以及實現

public interface PlayerService {
    void add(Player player);

    List<Player> getAll();
}

@Service
public class PlayerServiceImpl implements PlayerService{

    @Autowired
    private PlayerDao playerDao;

    @Override
    public void add(Player player) {
        playerDao.save(player);
    }

    @Override
    public List<Player> getAll() {
        PageHelper.startPage(1, 2);
        return playerDao.findAll();
    }

}

在src/main/resources 下新建一個包mapppers用來存放mybatis的xml文件

<?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="learning.mapper.PlayerDao">
    <insert id="save">
        INSERT INTO player (name,points) VALUES (#{name},#{points})
    </insert>   

    <select id="findByKey" resultType="learning.model.Player">
        SELECT * FROM player WHERE id = #{id}
    </select>

    <select id="findAll" resultType="learning.model.Player">
        SELECT * FROM player
    </select>   
</mapper>

在src/main/resources在新建一個目錄templates用來存放freemarker加載的模板

隨意編寫一個freemarker 的模板html界面

<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
    <h3>success</h3>
    <#list list as player>
        ${player.name} : ${player.points} <br/>
    </#list>

</body>
</html>

然后編寫控制層代碼

@Controller
@RequestMapping("/Test")
public class TestController {
    @Autowired
    private PlayerService playerService;

    @RequestMapping("/getAll")
    @ResponseBody
    public Object getAll(){
        Player player = new Player();
        player.setName("杜蘭特");
        player.setPoints(28.4);
        player.setId(3);
        return player;              
    }

    @RequestMapping("/all")
    @ResponseBody
    public Object get(){
        return playerService.getAll();
    }

    @RequestMapping("/add")
    public String add(Player player){
        playerService.add(player);
        return "test/hello";
    }

    @RequestMapping("/hello")
    public String hello(Model model) {
        List<Player> list = playerService.getAll();
        model.addAttribute("list",list);
        return "test/hello";
    }

最后編寫項目的啟動代碼主要啟動類的路徑要在其他要掃描包的同級目錄
如圖AppStart

啟動類代碼

@SpringBootApplication
//這里是掃描dao接口的包用於識別mybatis
@MapperScan(basePackages="learning.mapper")
public class AppStart {
    /** * @param args */
    public static void main(String[] args) {
        SpringApplication.run(AppStart.class, args);
    }
}

最后啟動AppStart main 方法即可

日志信息

這里是我的項目代碼
http://download.csdn.net/download/cmmchenmm/9897156

我將代碼上傳到了GitHub上了
https://github.com/newShiJ/SpringBoot-Learing