使用IDEA搭建Spring boot+Mybatis工程

简介

Spring boot特点：只使用一个核心配置文件，取消了一系列xml配置，甚至连web.xml都没有, 全部使用注解的方式完成WEB层的功能。框架内置Tomcat服务器，运行启动类中的Main函数即可启动。

 

下面就来搭建Spring boot+Mybatis工程

新建工程

 

勾上web，其他的不用

 

Finish

 

完善一下目录结构：

 

在pom.xml配置所有相关的依赖：

<?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>com.tqh</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <mybatis-spring-boot.version>1.2.0</mybatis-spring-boot.version>
        <mysql-connector.version>5.1.39</mysql-connector.version>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <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>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>${mybatis-spring-boot.version}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql-connector.version}</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

 

配置核心文件 application.properties：

server.port=9090
#视图层控制 用mvc方式访问templates下的HTML
spring.mvc.view.prefix=classpath:/templates/
spring.mvc.view.suffix=.html
spring.mvc.static-path-pattern=/static/**
        
spring.thymeleaf.mode=HTML5
spring.thymeleaf.encoding=UTF-8
spring.thymeleaf.content-type=text/html
#开发时关闭缓存,不然没法看到实时页面
spring.thymeleaf.cache=false
#thymeleaf这样配置就可以直接访问static下的HTML(和mvc访问方式二选一)
spring.thymeleaf.prefix = classpath:/static/
spring.thymeleaf.suffix = .html
        
spring.datasource.url=jdbc:mysql://localhost:3306/labwork?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
mybatis.typeAliasesPackage=com.tqh.demo.model 

 测试的数据库自己建好，不赘述

 

 

测试

在model包 创建个Person类

package com.tqh.demo.model;

public class Person {

    private Integer id;
    private String name;
    private Integer age;

    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 Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return
                "id=" + id +
                        ", name='" + name + '\'' +
                        ", age=" + age
                ;
    }
}

 

在Mapper包创建一个UserMapper

package com.tqh.demo.mapper;

import com.tqh.demo.model.Person;
import org.apache.ibatis.annotations.Select;
@Repository
public interface UserMapper { 
　　@Select("SELECT * FROM Person WHERE id = #{id}") 
　　Person selectUser(int id); 
}

 

在Service包创建一个UserService

package com.tqh.demo.service;
import com.tqh.demo.model.Person;

public class UserService {

     @Autowired
     UserMapper userMapper;

     @Override
    public Person selectUser(int id) {
         return userMapper.selectUser(id);
     }

 }

 

在controller包新建一个UserController控制器

package com.tqh.demo.controller;

import com.tqh.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping("/showUser/{id}")
    public String selectUser (@PathVariable int id){
        return userService.selectUser(id).toString();

    }
}

 

编写启动类DemoApplication

package com.tqh.demo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@MapperScan("com.tqh.demo.mapper")
@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

 

运行DemoApplication，打开浏览器访问http://localhost:9090/showUser/1，成功查询到数据库的数据