如何使用Spring Boot一步一步搭建一个Web的基础工程……

安装Mysql

官方下载地址：https://dev.mysql.com/downloads/windows/ 自己去下载安装就行了。
新建数据库moxi和管理员表admin

CREATE TABLE `admin` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `userName` varchar(45) NOT NULL,
  `password` varchar(45) NOT NULL,
  `realName` varchar(45) DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  `phoneNumber` varchar(45) DEFAULT NULL,
  `headPicture` varchar(45) DEFAULT NULL,
  `addDate` date DEFAULT NULL,
  `updateDate` date DEFAULT NULL,
  `state` int(11) DEFAULT '0' COMMENT '1：正常\n2：冻结\n3：删除',
  PRIMARY KEY (`id`),
  UNIQUE KEY `name_UNIQUE` (`userName`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

INSERT INTO `admin` VALUES (1,'admin','admin','面皮大师',28,'17788886666','','2017-06-15','2017-06-15',1);

工程结构图如下

工程加载Mybatis和Mysql的依赖
修改pom.xml

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.foreknow</groupId>
    <artifactId>moxi</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>moxi</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- mysql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

建Model、Dao、Service和Controller
新建package：model，新建Admin类：

package com.foreknow.model;

/**
 * Created by imac on 2018/12/22.
 */
import java.sql.Date;

public class Admin {

    private long id;
    private String userName;
    private String password;
    private int age;
    private String phoneNumber;
    private String headPicture;
    private Date addDate;
    private Date updateDate;
    private int state;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getAge() {
        return age;
    }

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

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public String getHeadPicture() {
        return headPicture;
    }

    public void setHeadPicture(String headPicture) {
        this.headPicture = headPicture;
    }

    public Date getAddDate() {
        return addDate;
    }

    public void setAddDate(Date addDate) {
        this.addDate = addDate;
    }

    public Date getUpdateDate() {
        return updateDate;
    }

    public void setUpdateDate(Date updateDate) {
        this.updateDate = updateDate;
    }

    public int getState() {
        return state;
    }

    public void setState(int state) {
        this.state = state;
    }

    @Override
    public String toString() {
        return "Admin [id=" + id + ", userName=" + userName + ", password=" + password + ", age=" + age
                + ", phoneNumber=" + phoneNumber + ", headPicture=" + headPicture + ", addDate=" + addDate
                + ", updateDate=" + updateDate + ", state=" + state + "]";
    }

}

新建package：Dao，新建AdminDao类：

package com.foreknow.dao;

import com.foreknow.model.Admin;

import java.util.List;

/**
 * Created by imac on 2018/12/23.
 */
public interface AdminDao {

    Admin findByNameAndPassword(Admin admin);

    List<Admin> findByAdminWithPage(Admin admin, int start, int end);

    int insert(Admin admin);

    int updateStateById(int id);

    int deleteById(int id);
}

新建mapper:创建AdminDao.xml映射文件

<?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="com.foreknow.dao.AdminDao">
    <select id="findByNameAndPassword" resultType="com.foreknow.model.Admin">
       SELECT * FROM admin where userName = #{userName} and password = #{password} and state = 0
    </select>

    <select id="findByAdminWithPage" resultType="com.foreknow.model.Admin">
      SELECT * FROM admin where userName = #{userName} and password = #{password} and realName = #{realName}
    </select>

    <insert id="insert" parameterType="com.foreknow.model.Admin" >
      INSERT INTO admin(id, userName, password, realName, age, phoneNumber, headPicture, addDate, updateDate, state) VALUES (null, #{userName}, #{password}, #{realName}, #{age}, #{phoneNumber}, #{headPicture}, now(), now(), 0)
    </insert>

    <update id="updateStateById" parameterType="java.lang.Integer">
      UPDATE admin SET userName = #{userName}, password = #{password}, realName = #{realName}, age= #{age}, phoneNumber = #{phoneNumber}, headPicture = #{headPicture}, updateDate = now(), state = #{state} WHERE id = #{id}
    </update>

    <delete id="deleteById" parameterType="java.lang.Integer">
      DELETE FROM admin WHERE id  = #{id}
    </delete>
</mapper>

新建配制文件

新建属性文件：application.properties

server.port=8082
server.servlet.context-path=/moxi
jdbc.driver = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/moxi?useUnicode=true&characterEncoding=UTF-8&useSSL=false
jdbc.username = root
jdbc.password =

#Mybatis
mybatis_config_file=mybatis-config.xml
mapper_path=/mapper/**.xml
entity_package=com.foreknow.model

logging.level.com.foreknow.dao=debug

新建Mybatis核心配制文件：mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<!--通过这个配置文件，完成mybatis与数据库的连接  -->
<configuration>
<settings>
    <!--使用jdbc的getGeneratedKeys获取数据库自增主键值-->
    <setting name="useGeneratedKeys" value="true"/>
    <!--使用列标签替换别名 默认：true-->
    <setting name="useColumnLabel" value="true" />
    <!--开启驼峰命名转换：e{create_time} -> Entity{createTime}-->
    <setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
</configuration>

新建Dao共通类

package com.foreknow.config.dao;

import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.beans.PropertyVetoException;

/**
 * Created by imac on 2018/5/6.
 */
@Configuration
//mapper的扫描路径
@MapperScan("com.foreknow.dao")
public class DataSourceConfiguration {
    @Value("${jdbc.driver}")
    private String jdbcDriver;
    @Value("${jdbc.url}")
    private String jdbcUrl;
    @Value("${jdbc.username}")
    private String jdbcUsername;
    @Value("${jdbc.password}")
    private String jdbcPassword;

    @Bean(name = "dataSource")
    public ComboPooledDataSource createDataSource() throws PropertyVetoException {
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setDriverClass(jdbcDriver);
        dataSource.setJdbcUrl(jdbcUrl);
        dataSource.setUser(jdbcUsername);
        dataSource.setPassword(jdbcPassword);
        dataSource.setAutoCommitOnClose(false);
        return dataSource;
    }
}

package com.foreknow.config.dao;


import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;
import java.io.IOException;

/**
 * Created by imac on 2018/5/6.
 */
@Configuration
public class SessionFactoryConfiguration {
    @Value("${mybatis_config_file}")
    private String mybatisConfigFilePath;
    @Value("${mapper_path}")
    private String mapperPath;
    @Value("${entity_package}")
    private String entityPackage;
    @Autowired
    private DataSource dataSource;

    @Bean(name="sqlSessionFactory")
    public SqlSessionFactoryBean createSqlSessionFactoryBean() throws IOException {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setConfigLocation(new ClassPathResource(mybatisConfigFilePath));
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        String packageSearchPath = PathMatchingResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX+mapperPath;
        //SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setMapperLocations(resolver.getResources(packageSearchPath));
        sqlSessionFactoryBean.setDataSource(dataSource);
        sqlSessionFactoryBean.setTypeAliasesPackage(entityPackage);
        return sqlSessionFactoryBean;
    }
}

新建package：service，新建AdminService接口：

package com.foreknow.service;

import com.foreknow.model.Admin;
import org.apache.ibatis.annotations.*;

import java.util.List;

/**
 * Created by imac on 2018/12/22.
 */
@Mapper
public interface AdminService {
    Admin findByNameAndPassword(Admin admin);

    List<Admin> findByAdminWithPage(Admin admin, int start, int end);

    int insert(Admin admin);

    int updateStateById(int id);

    int deleteById(int id);
}

新建package：impl，新建AdminDaoImpl类：

package com.foreknow.service.impl;

import com.foreknow.dao.AdminDao;
import com.foreknow.model.Admin;
import com.foreknow.service.AdminService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * Created by imac on 2018/12/23.
 */
@Service
public class AdminServiceImpl implements AdminService {

    @Autowired
    private AdminDao adminDao;
    @Override
    public Admin findByNameAndPassword(Admin admin) {
        return adminDao.findByNameAndPassword(admin);
    }

    @Override
    public List<Admin> findByAdminWithPage(Admin admin, int start, int end) {
        return adminDao.findByAdminWithPage(admin,start,end);
    }

    @Override
    public int insert(Admin admin) {
        return adminDao.insert(admin);
    }

    @Override
    public int updateStateById(int id) {
        return adminDao.updateStateById(id);
    }

    @Override
    public int deleteById(int id) {
        return adminDao.deleteById(id);
    }
}

显示效果如下

注意

spring注解方式 idea报could not autowire

解决办法

解决方法为：file—->Project Structure,在如下的界面选择 Factors，然后删除Spring(直接右键Delete)
即可。