学习springBoot 与myBatis加mysql整合查询案例

目录结构：

pom.xml文件：

<?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.example</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>1.5.6.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>
        <java.version>1.7</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--mybatis的依赖配置-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>
        <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.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.28</version>
        </dependency>
        <!-- alibaba的druid数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.11</version>
        </dependency>
        <!--json的相关配置-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-joda</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.module</groupId>
            <artifactId>jackson-module-parameter-names</artifactId>
        </dependency>
        <!-- 分页插件 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.1.2</version>
        </dependency>
        <!-- alibaba的druid数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!-- mybatis generator 自动生成代码插件 -->
            <!--<plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
            </plugin>-->
        </plugins>
    </build>


</project>

UserMapping.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="com.example.demo.mapper.UserMapper" >
    <resultMap id="BaseResultMap" type="com.example.demo.model.User" >
        <id column="user_id" property="userId" jdbcType="INTEGER" />
        <result column="user_name" property="userName" jdbcType="VARCHAR" />
       <!-- <result column="password" property="password" jdbcType="VARCHAR" />-->
        <result column="phone" property="phone" jdbcType="VARCHAR" />
    </resultMap>
    <sql id="Base_Column_List" >
        user_id, user_name, phone
    </sql>

    <!-- 查询全部的方法 -->
    <select id="getAllUser" resultMap="BaseResultMap">
        select
        <include refid="Base_Column_List" />
        from MAC_USER
    </select>
    <!--<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
        delete from t_user
        where user_id = #{userId,jdbcType=INTEGER}
    </delete>
    <insert id="insert" parameterType="com.winter.model.User" >
        insert into t_user (user_id, user_name, password,
        phone)
        values (#{userId,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},
        #{phone,jdbcType=VARCHAR})
    </insert>
    <insert id="insertSelective" parameterType="com.winter.model.User" >
        insert into t_user
        <trim prefix="(" suffix=")" suffixOverrides="," >
            <if test="userId != null" >
                user_id,
            </if>
            <if test="userName != null" >
                user_name,
            </if>
            <if test="password != null" >
                password,
            </if>
            <if test="phone != null" >
                phone,
            </if>
        </trim>
        <trim prefix="values (" suffix=")" suffixOverrides="," >
            <if test="userId != null" >
                #{userId,jdbcType=INTEGER},
            </if>
            <if test="userName != null" >
                #{userName,jdbcType=VARCHAR},
            </if>
            <if test="password != null" >
                #{password,jdbcType=VARCHAR},
            </if>
            <if test="phone != null" >
                #{phone,jdbcType=VARCHAR},
            </if>
        </trim>
    </insert>
    <update id="updateByPrimaryKeySelective" parameterType="com.winter.model.User" >
        update t_user
        <set >
            <if test="userName != null" >
                user_name = #{userName,jdbcType=VARCHAR},
            </if>
            <if test="password != null" >
                password = #{password,jdbcType=VARCHAR},
            </if>
            <if test="phone != null" >
                phone = #{phone,jdbcType=VARCHAR},
            </if>
        </set>
        where user_id = #{userId,jdbcType=INTEGER}
    </update>
    <update id="updateByPrimaryKey" parameterType="com.winter.model.User" >
        update t_user
        set user_name = #{userName,jdbcType=VARCHAR},
        password = #{password,jdbcType=VARCHAR},
        phone = #{phone,jdbcType=VARCHAR}
        where user_id = #{userId,jdbcType=INTEGER}
    </update>-->
</mapper>

application.yml数据库相关配置文件

server:
  port: 8080

spring:
    datasource:
        name: test
        url: jdbc:mysql://192.168.10.17:3306/mac_demo
        username: root
        password: 123456
        # 使用druid数据源
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.jdbc.Driver
        filters: stat
        maxActive: 20
        initialSize: 1
        maxWait: 60000
        minIdle: 1
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: select 'x'
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        maxOpenPreparedStatements: 20

mybatis:
  mapper-locations: classpath:mapping/*.xml
  type-aliases-package: com.example.demo.model

#pagehelper分页插件
pagehelper:
    helperDialect: mysql
    reasonable: true
    supportMethodsArguments: true
    params: count=countSql

User.java

package com.example.demo.model;

public class User {

    private Integer userId ;
    private String userName;
    private String phone ;
    
    public String getUserName() {
        return userName;
    }

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

    public Integer getUserId() {
        return userId;
    }

    public void setUserId(Integer userId) {
        this.userId = userId;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }
}

UserMapper.xml

package com.example.demo.mapper;

import com.example.demo.model.User;

import java.util.List;

public interface UserMapper {

    List<User> getAllUser() ;


}

UserService.java

package com.example.demo.service;

import com.example.demo.model.User;

import java.util.List;

public interface UserService {

    //List<User> getAllUser(int pageNum,int pageSize) ;
    List<User> getAllUser() ;


}

UserServiceImpl.java

package com.example.demo.service.impl;

import com.example.demo.mapper.UserMapper;
import com.example.demo.model.User;
import com.example.demo.service.UserService;
import com.github.pagehelper.PageHelper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
@Service(value="userService")
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper ;

   /* @Override
    public List<User> getAllUser(int pageNum,int pageSize) {
        PageHelper.startPage(pageNum,pageSize) ;
        return userMapper.getAllUser();
    }*/
   @Override
   public List<User> getAllUser(){
       return userMapper.getAllUser() ;
   }
}

UserController.java

package com.example.demo.controller;

import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService ;
    
    //分页的写法
    /*@ResponseBody
    @RequestMapping(value = "/all/{pageNum}/{pageSize}",produces = {"application/json;charset=UTF-8"})
    public Object getAllUser(@PathVariable("pageNum") int pageNum,@PathVariable("pageSize") int pageSize){

        return userService.getAllUser(pageNum,pageSize) ;
    }*/
    @ResponseBody
    @RequestMapping(value = "/all",produces = {"application/json;charset=UTF-8"})
    public Object getAllUser(){
        return userService.getAllUser() ;
    }

}

DemoAppliction.java这个是springboot的核心主文件

package com.example.demo;

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

@SpringBootApplication//组合注解
@EnableAutoConfiguration//隐式地为特定项目定义了一个基本“搜索包”。
@MapperScan("com.example.demo.mapper")
public class DemoApplication {

    public static void main(String[] args) {

        SpringApplication.run(DemoApplication.class, args);
    }
}

harddream!!!