创建springboot的聚合工程（三）

springboot聚合工程之添加mybatis数据库持久化操作

在boot-polymer-repository工程添加mybatis的相关依赖

<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>com.polymer</groupId>
        <artifactId>boot-polymer</artifactId>
        <version>1.0.0.RELEASE</version>
    </parent>
    <artifactId>boot-polymer-repository</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- mybaits配置 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.2.0</version>
        </dependency>
        <!-- 添加druid使用阿里巴巴druid连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.28</version>
        </dependency>
        <!-- 添加mysql驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--dbutils -->
        <dependency>
            <groupId>commons-dbutils</groupId>
            <artifactId>commons-dbutils</artifactId>
            <version>1.7</version>
        </dependency>
    </dependencies>
</project>

添加application配置本项目使用的是yml文件

spring:
    datasource:
        name: test
        url: jdbc:mysql://localhost:3306/epay?characterEncoding=UTF-8
        username: root
        password: 123
        # 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:
    mapperLocations: classpath:mapper/*.xml
    typeAliasesPackage: com.polymer.app.entity

第三步：使用mybatis自动生成工具将表生成mapper文件

CREATE TABLE `bussiness_param` (
`PARAM_TYPE` varchar(20) NOT NULL DEFAULT ‘‘ COMMENT ‘类型‘,
`PARAM_VALUE` varchar(255) NOT NULL COMMENT ‘值‘,
`DESCR` varchar(255) DEFAULT NULL COMMENT ‘说明‘,
`REMARK` varchar(255) DEFAULT NULL COMMENT ‘备注‘,
PRIMARY KEY (`PARAM_TYPE`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

package com.polymer.app.entity;

public class BussinessDO {
    private String paramType;

    private String paramValue;

    private String descr;

    private String remark;

    public String getParamType() {
        return paramType;
    }

    public void setParamType(String paramType) {
        this.paramType = paramType;
    }

    public String getParamValue() {
        return paramValue;
    }

    public void setParamValue(String paramValue) {
        this.paramValue = paramValue;
    }

    public String getDescr() {
        return descr;
    }

    public void setDescr(String descr) {
        this.descr = descr;
    }

    public String getRemark() {
        return remark;
    }

    public void setRemark(String remark) {
        this.remark = remark;
    }
}

package com.polymer.app.mapper;

import org.apache.ibatis.annotations.Mapper;

import com.polymer.app.entity.BussinessDO;
@Mapper
public interface BussinessMapper {
    int deleteByPrimaryKey(String paramType);

    int insert(BussinessDO record);

    int insertSelective(BussinessDO record);

    BussinessDO selectByPrimaryKey(String paramType);

    int updateByPrimaryKeySelective(BussinessDO record);

    int updateByPrimaryKey(BussinessDO record);
}

<?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.polymer.app.mapper.BussinessMapper">
  <resultMap id="BaseResultMap" type="com.polymer.app.entity.BussinessDO">
    <id column="PARAM_TYPE" jdbcType="VARCHAR" property="paramType" />
    <result column="PARAM_VALUE" jdbcType="VARCHAR" property="paramValue" />
    <result column="DESCR" jdbcType="VARCHAR" property="descr" />
    <result column="REMARK" jdbcType="VARCHAR" property="remark" />
  </resultMap>
  <sql id="Base_Column_List">
    PARAM_TYPE, PARAM_VALUE, DESCR, REMARK
  </sql>
  <select id="selectByPrimaryKey" parameterType="java.lang.String" resultMap="BaseResultMap">
    select
    <include refid="Base_Column_List" />
    from bussiness_param
    where PARAM_TYPE = #{paramType,jdbcType=VARCHAR}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.String">
    delete from bussiness_param
    where PARAM_TYPE = #{paramType,jdbcType=VARCHAR}
  </delete>
  <insert id="insert" parameterType="com.polymer.app.entity.BussinessDO">
    insert into bussiness_param (PARAM_TYPE, PARAM_VALUE, DESCR,
      REMARK)
    values (#{paramType,jdbcType=VARCHAR}, #{paramValue,jdbcType=VARCHAR}, #{descr,jdbcType=VARCHAR},
      #{remark,jdbcType=VARCHAR})
  </insert>
  <insert id="insertSelective" parameterType="com.polymer.app.entity.BussinessDO">
    insert into bussiness_param
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="paramType != null">
        PARAM_TYPE,
      </if>
      <if test="paramValue != null">
        PARAM_VALUE,
      </if>
      <if test="descr != null">
        DESCR,
      </if>
      <if test="remark != null">
        REMARK,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="paramType != null">
        #{paramType,jdbcType=VARCHAR},
      </if>
      <if test="paramValue != null">
        #{paramValue,jdbcType=VARCHAR},
      </if>
      <if test="descr != null">
        #{descr,jdbcType=VARCHAR},
      </if>
      <if test="remark != null">
        #{remark,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.polymer.app.entity.BussinessDO">
    update bussiness_param
    <set>
      <if test="paramValue != null">
        PARAM_VALUE = #{paramValue,jdbcType=VARCHAR},
      </if>
      <if test="descr != null">
        DESCR = #{descr,jdbcType=VARCHAR},
      </if>
      <if test="remark != null">
        REMARK = #{remark,jdbcType=VARCHAR},
      </if>
    </set>
    where PARAM_TYPE = #{paramType,jdbcType=VARCHAR}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.polymer.app.entity.BussinessDO">
    update bussiness_param
    set PARAM_VALUE = #{paramValue,jdbcType=VARCHAR},
      DESCR = #{descr,jdbcType=VARCHAR},
      REMARK = #{remark,jdbcType=VARCHAR}
    where PARAM_TYPE = #{paramType,jdbcType=VARCHAR}
  </update>
</mapper>

把文件放到以下目录：

后面就可以试着调方法了。注意要把mapper放在对应位置，否则yml配置的路径就找不到了

外贴一个我的项目地址，有兴趣去看一下，后面会陆续完善：https://gitee.com/zyf6303/boot-ployer

原文地址：https://www.cnblogs.com/zyf-yxm/p/10320828.html