TKmybatis的框架介绍和原理分析及Mybatis新特性演示

tkmybatis是在mybatis框架的基础上提供了很多工具，让开发更加高效，下面来看看这个框架的基本使用，后面会对相关源码进行分析，感兴趣的同学可以看一下，挺不错的一个工具

实现对员工表的增删改查的代码

java的dao层接口

public interface WorkerMapper extends Mapper<Worker> {
}

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.jjs.kaiwen.dao.WorkerMapper">
  <resultMap id="BaseResultMap" type="com.jjs.kaiwen.model.Worker">
    <!--
      WARNING - @mbggenerated
    -->
    <id column="id" jdbcType="INTEGER" property="id" />
    <result column="worker_id" jdbcType="VARCHAR" property="workerId" />
    <result column="name" jdbcType="VARCHAR" property="name" />
    <result column="org_id" jdbcType="INTEGER" property="orgId" />
    <result column="status" jdbcType="VARCHAR" property="status" />
    <result column="role_id" property="roleId" jdbcType="INTEGER" />
  </resultMap>
</mapper>

实体对象

@Table(name = "worker")
public class Worker {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    @Column(name = "worker_id")
    private String workerId;

    private String name;

    @Column(name = "org_id")
    private Integer orgId;

    private String status;

    @Column(name = "role_id")
    private Integer roleId;

    // getters and setters ...
    }

以上就是实现对Worker进行增删改查的所有代码，包括选择性更新、插入、删除等，所有的方法列表如下

以后对表字段的添加或修改只需要更改实体对象的注解，不需要修改xml映射文件，如将worker_id改成worker_no

@Column(name = "worker_no")
private String workerNo;

数据源的配置，只需要将org.mybatis.spring.mapper.MapperScannerConfigurer改成tk.mybatis.spring.mapper.MapperScannerConfigurer，然后加一个属性

，也可不加，因为框架提供了默认实现

    <bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
        <property name="basePackage" value="com.jjs.zanbi.dao" />
        <property name="properties">
            <value>
                mappers=tk.mybatis.mapper.common.Mapper
            </value>
        </property>
    </bean>

用这个库之后写代码感觉在飞…….如果只是简单的了解此框架到这里就可以了，下面是对框架实现原理的分析

原理的简单分析

此框架为我们实现这些功能所有的改动都在Mapper层面，所有的Mapper都继承了tk.mybatis.mapper.common.Mapper

public interface WorkerMapper extends Mapper<Worker> {}

Mapper接口的声明如下，可以看到Mapper接口实现了所有常用的方法

public interface Mapper<T> extends
        BaseMapper<T>,
        ExampleMapper<T>,
        RowBoundsMapper<T>,
        Marker {

}

看一下完整的UML图，太大了，可以用新窗口打开，放大之后再看

这里选择一个接口：SelectOneMapper接口，对于源码进行简单分析，此接口声明如下：

public interface SelectOneMapper<T> {

    /**
     * 根据实体中的属性进行查询，只能有一个返回值，有多个结果是抛出异常，查询条件使用等号
     *
     * @param record
     * @return
     */
    @SelectProvider(type = BaseSelectProvider.class, method = "dynamicSQL")
    T selectOne(T record);

}

@SelectProvider是mybatis3之后提供的，用于灵活的设置sql来源，这里设置了服务提供类和方法，但这个库并没有直接用method指定的方法来返回sql，而是在运行时进行解析的，代码如下

public class BaseSelectProvider extends MapperTemplate {

    public String selectOne(MappedStatement ms) {
        Class<?> entityClass = getEntityClass(ms);
        //修改返回值类型为实体类型
        setResultType(ms, entityClass);
        StringBuilder sql = new StringBuilder();
        sql.append(SqlHelper.selectAllColumns(entityClass));
        sql.append(SqlHelper.fromTable(entityClass, tableName(entityClass)));
        sql.append(SqlHelper.whereAllIfColumns(entityClass, isNotEmpty()));
        return sql.toString();
    }
}

到这里我们就大概知道了这个库为我们提供便利的原理了，总的来说就是这个库帮我们提供了对表的基本操作的sql，帮我们省了很多工作量，而且维护起来也很方便，否则我们的xml文件动不动就几百行甚至上千行

对源码的探索不能到这里停止，最起码要分析到与另一个框架的整合点

我们知道，mybatis的mapper接口是在启动的时候被框架以JdkProxy的形式封装了的，具体对应的类是MapperFactoryBean，这个类中有一个checkDaoConfig()方法，是从父类继承并重写了该方法，继承结构如下

MapperFactoryBean -> SqlSessionDaoSupport -> DaoSupport

这里的DaoSupport就是spring提供的Dao的抽象，代码如下

public abstract class DaoSupport implements InitializingBean {

// spring 完成属性设置后会调用此方法
    @Override
    public final void afterPropertiesSet() throws IllegalArgumentException, BeanInitializationException {
        // 这里提供了接口供子类去实现
        checkDaoConfig();

        // Let concrete implementations initialize themselves.
        try {
            initDao();
        }
        catch (Exception ex) {
            throw new BeanInitializationException("Initialization of DAO failed", ex);
        }
    }

    protected abstract void checkDaoConfig() throws IllegalArgumentException;

    protected void initDao() throws Exception {
    }

}

框架自定义的MapperFactoryBean重写了checkDaoConfig()方法，完成对所有sql语句的设置，代码如下

    @Override
    protected void checkDaoConfig() {
        super.checkDaoConfig();
        //通用Mapper
        if (mapperHelper.isExtendCommonMapper(getObjectType())) {
        //这里去处理该类所对应的MappedStatement，封装在helper类中处理
            mapperHelper.processConfiguration(getSqlSession().getConfiguration(), getObjectType());
        }
    }

MapperHelper的processConfiguration方法如下

    public void processConfiguration(Configuration configuration, Class<?> mapperInterface) {
        String prefix;
        if (mapperInterface != null) {
            prefix = mapperInterface.getCanonicalName();
        } else {
            prefix = "";
        }
        for (Object object : new ArrayList<Object>(configuration.getMappedStatements())) {
            if (object instanceof MappedStatement) {
                MappedStatement ms = (MappedStatement) object;
                //检查这个MappedStatement是否属于此映射对象
                if (ms.getId().startsWith(prefix) && isMapperMethod(ms.getId())) {
                    if (ms.getSqlSource() instanceof ProviderSqlSource) {
                       //去设置该statement的sql语句
                        setSqlSource(ms);
                    }
                }
            }
        }
    }

设置sql的逻辑，提供了几种不同类型的sqlsource

    public void setSqlSource(MappedStatement ms) throws Exception {
        if (this.mapperClass == getMapperClass(ms.getId())) {
            throw new RuntimeException("请不要配置或扫描通用Mapper接口类：" + this.mapperClass);
        }
        Method method = methodMap.get(getMethodName(ms));
        try {
            //第一种，直接操作ms，不需要返回值
            if (method.getReturnType() == Void.TYPE) {
                method.invoke(this, ms);
            }
            //第二种，返回SqlNode
            else if (SqlNode.class.isAssignableFrom(method.getReturnType())) {
                SqlNode sqlNode = (SqlNode) method.invoke(this, ms);
                DynamicSqlSource dynamicSqlSource = new DynamicSqlSource(ms.getConfiguration(), sqlNode);
                setSqlSource(ms, dynamicSqlSource);
            }
            //第三种，返回xml形式的sql字符串
            else if (String.class.equals(method.getReturnType())) {
                String xmlSql = (String) method.invoke(this, ms);
                SqlSource sqlSource = createSqlSource(ms, xmlSql);
                //替换原有的SqlSource
                setSqlSource(ms, sqlSource);

到这里整个sql的获取流程就分析完了，本人用这个库写过一个小项目，确实节省了开发的工作量，而且DAO层的结构更加清晰简洁了

关于mybatis新特性

从3.4.0开始，mybatis提供对外部表的alias引用方法，多表联合查询就方便多了，我们先看原始的方式是怎样做的

select a.id,a.name,b.bid,b.bname .....
from user a
left join room b

原始的方式是将所有的表字段列出来，再来看用新特性怎样做

select id="selectUsers" resultType="map">
  select
    <include refid="user_col_sql_id"><property name="alias" value="t1"/>,
    <include refid="room_col_sql_id"><property name="alias" value="t2"/>
  from user t1
    left join room t2
</select>

这里主要就是对基本的sql进行了复用，如果对表进行了修改只要在原始的sql节点修改就可以了，就算是5个表的联合查询，sql也是清晰易懂，维护起来会更轻松

新版本的mybatis对于对象映射也提供了更友好的方式，直接使用外部的ResultMap再加上查询语句中的别名就映射完成了

    <resultMap id="workerResultMap" type="com.jjs.kaiwen.model.Worker" extends="BaseResultMap">
        <association property="room" columnPrefix="b_"  resultMap="com.jjs.kaiwen.dao.OrgMapper.BaseResultMap"/>
    </resultMap>

更进一步

敏锐的程序员可能会提出问题，如当多表查询的时候可能会存在字段名称相同的情况，这里的解决方案是给include添加另一个属性

<include refid="user_col_sql_id_with_alias">
<property name="alias" value="t"/>
<property name="prefix" value="t_"/>
</include>

包含prefix的sqlNode如下

    <sql id="base_column_with_alias">
        ${alias}.ID as ${prefix}ID,
        ${alias}.WORKER_ID as ${prefix}WORKER_ID,
        ${alias}.NAME as ${prefix}NAME,
        ${alias}.ZB_ROLE_ID as ${prefix}ZB_ROLE_ID,
        ${alias}.ORG_ID as ${prefix}ORG_ID,
        ${alias}.STATUS as ${prefix}STATUS
    </sql>

如果说觉得手动写包含alias和prefix的字段麻烦，可以用，mybatis代码生成器的插件的方式实现，我自己写了一个生成器的插件，可以代码再这里，仅供参考

通用Service类

/**
 * Created by Kaiwen
 */
@Service
public abstract class CommonServiceImpl<T,PK extends Serializable> implements CommonService<T,PK> {
    /**
     * 泛型注入
     */
    @Autowired
    private Mapper<T> mapper;

    public T selectByPrimaryKey(PK entityId) {

        return mapper.selectByPrimaryKey(entityId);
    }

    public int deleteByPrimaryKey(PK entityId) {
        return mapper.deleteByPrimaryKey(entityId);
    }

    public int insert(T record) {
        return mapper.insert(record);
    }

    public int insertSelective(T record) {
        return mapper.insertSelective(record);
    }

    public int updateByPrimaryKeySelective(T record) {
        return mapper.updateByPrimaryKeySelective(record);
    }

    public int updateByPrimaryKey(T record) {
        return mapper.updateByPrimaryKey(record);
    }

    public List<T> selectByExample(Example example) {
        return mapper.selectByExample(example);
    }
}

注入方式区别

    <bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
        <property name="basePackage" value="com.jjshome.esf.core.dao.school" />
        <property name="properties">
            <value>
                mappers=tk.mybatis.mapper.common.Mapper
            </value>
        </property>
    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.jjshome.esf.core.dao.community,com.jjshome.esf.core.dao.hsl"/>
    </bean>

实体类

package com.jjshome.esf.common.entity.school;

import java.util.Date;
import javax.persistence.*;

@Table(name = "XQ_SCHOOL_AREA")
public class SchoolArea {
    /**
     * 主键ID
     */
    @Id
    @Column(name = "ID")
    private Integer id;

    /**
     * 城市编码
     */
    @Column(name = "CITY_CODE")
    private String cityCode;

    /**
     * 学区名称
     */
    @Column(name = "NAME")
    private String name;

    /**
     * 学区名称拼音
     */
    @Column(name = "NAME_SPELL")
    private String nameSpell;

    /**
     * 状态,1:正常,0:删除
     */
    @Column(name = "STATUS")
    private Byte status;

    /**
     * 添加人
     */
    @Column(name = "CREATE_ID")
    private String createId;

    @Transient
    private Integer primaryCount; //小学数量
    @Transient
    private Integer middleCount; //初中数量
    @Transient
    private Integer highCount;//高中数量

TK mybatis Mapper文件内容

<?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.jjshome.esf.core.dao.school.ISchoolAreaDAO" >
  <resultMap id="BaseResultMap" type="com.jjshome.esf.common.entity.school.SchoolArea" >
    <!--
      WARNING - @mbggenerated
    -->
    <id column="ID" property="id" jdbcType="INTEGER" />
    <result column="CITY_CODE" property="cityCode" jdbcType="VARCHAR" />
    <result column="NAME" property="name" jdbcType="VARCHAR" />
    <result column="NAME_SPELL" property="nameSpell" jdbcType="VARCHAR" />
    <result column="STATUS" property="status" jdbcType="TINYINT" />
    <result column="CREATE_ID" property="createId" jdbcType="VARCHAR" />
    <result column="CREATE_DATE" property="createDate" jdbcType="TIMESTAMP" />
    <result column="UPDATE_ID" property="updateId" jdbcType="VARCHAR" />
    <result column="UPDATE_DATE" property="updateDate" jdbcType="TIMESTAMP" />
    <result column="CITY_NAME" property="cityName"/>
    <result column="PRIMARY_COUNT" property="primaryCount"/>
    <result column="MIDDLE_COUNT" property="middleCount"/>
    <result column="HIGH_COUNT" property="highCount"/>
  </resultMap>

    <resultMap id="SchoolDetailArea" type="com.jjshome.esf.common.entity.school.SchoolAreaDetail"
               extends="com.jjshome.esf.core.dao.school.ISchoolInfoDAO.SchoolInfo">
        <result column="SCHOOL_AREA_NAME" property="schoolAreaName"/>
    </resultMap>

    <select id="selectByPage" parameterType="map" resultMap="BaseResultMap">

        SELECT A.*, C.NAME AS CITY_NAME,
        (SELECT COUNT(*) FROM XQ_SCHOOL_INFO B WHERE A.ID=B.AREA_ID AND B.TYPE='553' AND B.STATUS = 1 ) AS PRIMARY_COUNT,
        (SELECT COUNT(*) FROM XQ_SCHOOL_INFO B WHERE A.ID=B.AREA_ID AND B.TYPE='554' AND B.STATUS = 1 ) AS MIDDLE_COUNT,
        (SELECT COUNT(*) FROM XQ_SCHOOL_INFO B WHERE A.ID=B.AREA_ID AND B.TYPE='555' AND B.STATUS = 1 ) AS HIGH_COUNT
        FROM XQ_SCHOOL_AREA A
        LEFT JOIN YW_CITY_SETTING C ON A.CITY_CODE = C.CODE
        <where>
            <if test="name != null and name != '' "> A.NAME LIKE CONCAT('%',#{NAME},'%')  </if>
            <if test="areaCityCode != null and areaCityCode != '' "> A.CITY_CODE = #{areaCityCode}  </if>
            <if test="keywords != null and keywords != '' ">
                ( A.NAME LIKE CONCAT('%',#{keywords},'%')
                )
            </if>
        </where>
    </select>

    <select id="selectAreaIdAndKeyWord" parameterType="java.util.Map" resultMap="BaseResultMap">
        SELECT
        *
        FROM
        XQ_SCHOOL_AREA
        WHERE
        1=1
        <if test="cityId != null">
            AND CITY_CODE=#{cityId}
        </if>
        <if test="key != null and key!=''">
            AND (NAME like CONCAT(#{key},'%' ) or NAME_SPELL like CONCAT(#{key},'%' ))
        </if>
        AND
        STATUS=1
        <if test="pageSize != null">
            limit #{pageSize}
        </if>
    </select>

    <!--查询学区详情列表-->
    <select id="selectAreaDetailByPage" parameterType="map" resultMap="SchoolDetailArea">

        SELECT A.* ,B.NAME AS SCHOOL_AREA_NAME ,C.NAME AS CITY_NAME,D.NAME AS AREA_NAME FROM XQ_SCHOOL_INFO A
        LEFT JOIN XQ_SCHOOL_AREA B ON A.AREA_ID = B.ID
        LEFT JOIN YW_CITY_SETTING C ON A.CITY_CODE = C.CODE
        LEFT JOIN YW_CITY_SETTING D ON A.AREA_CODE = D.CODE

        WHERE A.STATUS = 1 AND B.STATUS =1
        <if test="areaId != null and areaId.length() &gt; 0">  AND A.AREA_ID = #{areaId} </if>
        <if test="typeList != null and typeList.size &gt; 0">
            AND
            A.TYPE IN
            <foreach collection="typeList"  item="item" index="index" open="(" close=")" separator=",">
                #{item}
            </foreach>
        </if>
        <if test="name != null and name != '' "> AND   A.NAME LIKE CONCAT('%',#{name},'%')  </if>
    </select>

</mapper>

普通mybatisMapper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.jjshome.esf.core.dao.school.ISchoolInfoDAO">
    <resultMap id="SchoolInfo" type="com.jjshome.esf.common.entity.school.SchoolInfo">
        <id column="ID" property="id"/>
        <result column="NAME" property="name"/>
        <result column="NAME_SPELL" property="nameSpell"/>
        <result column="ALIAS" property="alias"/>
        <result column="ALIAS_SPELL" property="aliasSpell"/>
        <result column="TYPE" property="type" typeHandler="com.jjshome.esf.core.component.handler.DictValueTypeHandler"/>
        <result column="AREA_ID" property="areaId"/>
        <result column="CITY_CODE" property="cityCode"/>
        <result column="AREA_CODE" property="areaCode"/>
        <result column="ADDR" property="addr"/>
        <result column="START_TIME" property="startTime"/>
        <result column="MOTTO" property="motto"/>
        <result column="WEB_SITE" property="webSite"/>
        <result column="PHONE" property="phone"/>
        <result column="FEATURE" property="feature" typeHandler="com.jjshome.esf.core.component.handler.DictValueListTypeHandler"/>
        <result column="LNG" property="lng"/>
        <result column="LAT" property="lat"/>
        <result column="UNIT_PRICE" property="unitPrice"/>
        <result column="SALE_PRICE" property="salePrice"/>
        <result column="NATURE_TYPE" property="natureType" typeHandler="com.jjshome.esf.core.component.handler.DictValueTypeHandler"/>
        <result column="NATURE_CITY" property="natureCity" typeHandler="com.jjshome.esf.core.component.handler.DictValueTypeHandler"/>
        <result column="SCHOOL_DEGREE" property="schoolDegree"/>
        <result column="ENROL_DEGREE" property="enrolDegree"/>
        <result column="IMG_DEGREE" property="imgDegree"/>
        <result column="STATUS" property="status"/>
        <result column="CREATE_ID" property="createId"/>
        <result column="CREATE_DATE" property="createDate"/>
        <result column="UPDATE_ID" property="updateId"/>
        <result column="UPDATE_DATE" property="updateDate"/>

        <result column="CITY_NAME" property="cityName" />
        <result column="AREA_NAME" property="areaName" />
        <result column="SCHOOL_DISTRICT_NAME" property="schoolDistrictName" />
        <result column="SALE_COUNT" property="saleCount" />
    </resultMap>

    <sql id="Base_Column_List">
        ID,
        NAME,
        NAME_SPELL,
        ALIAS,
        ALIAS_SPELL,
        TYPE,
        AREA_ID,
        CITY_CODE,
        AREA_CODE,
        ADDR,
        START_TIME,
        MOTTO,
        WEB_SITE,
        PHONE,
        FEATURE,
        LNG,
        LAT,
        UNIT_PRICE,
        SALE_PRICE,
        NATURE_TYPE,
        NATURE_CITY,
        SCHOOL_DEGREE,
        ENROL_DEGREE,
        IMG_DEGREE,
        STATUS,
        CREATE_ID,
        CREATE_DATE,
        UPDATE_ID,
        UPDATE_DATE,
        SALE_COUNT,
        SALE_COUNT
    </sql>

    <select id="selectById" resultMap="SchoolInfo" parameterType="java.lang.Integer">
        SELECT
            i.*,
            yc.NAME as 'CITY_NAME',
            ya.NAME as 'AREA_NAME',
            xq.NAME as 'SCHOOL_DISTRICT_NAME'
        FROM
            XQ_SCHOOL_INFO i
            LEFT JOIN YW_CITY_SETTING yc ON i.CITY_CODE = yc.CODE
            LEFT JOIN YW_CITY_SETTING ya ON i.AREA_CODE = ya.CODE
            LEFT JOIN XQ_SCHOOL_AREA xq ON i.AREA_ID = xq.ID
        WHERE
            i.ID = #{id,jdbcType=INTEGER}
    </select>

    <delete id="deleteById" parameterType="java.util.Map">
        UPDATE
            XQ_SCHOOL_INFO
        SET
            STATUS = 0,
            UPDATE_ID = #{updateId},
            UPDATE_DATE = NOW()
        WHERE
            ID = #{id,jdbcType=INTEGER}
    </delete>

    <delete id="batchDeleteByIds" parameterType="java.util.Map">
        UPDATE
            XQ_SCHOOL_INFO
        SET
            STATUS = 0,
            UPDATE_ID = #{updateId},
            UPDATE_DATE = NOW()
        WHERE
        ID IN (${ids})
    </delete>

    <update id="deleteAreaRelation" parameterType="com.jjshome.esf.common.entity.school.SchoolInfo">
        update XQ_SCHOOL_INFO
            SET AREA_ID = NULL,
            UPDATE_DATE = NOW()
        WHERE
        ID = #{id}
    </update>

    <insert id="insert" parameterType="com.jjshome.esf.common.entity.school.SchoolInfo">
        <selectKey resultType="Integer" keyProperty="id">
            SELECT LAST_INSERT_ID()
        </selectKey>
        INSERT INTO XQ_SCHOOL_INFO
            (NAME,
            NAME_SPELL,
            ALIAS,
            ALIAS_SPELL,
            TYPE,
            AREA_ID,
            CITY_CODE,
            AREA_CODE,
            ADDR,
            START_TIME,
            MOTTO,
            WEB_SITE,
            PHONE,
            FEATURE,
            LNG,
            LAT,
            UNIT_PRICE,
            SALE_PRICE,
            NATURE_TYPE,
            NATURE_CITY,
            SCHOOL_DEGREE,
            ENROL_DEGREE,
            IMG_DEGREE,
            STATUS,
            CREATE_ID,
            CREATE_DATE,
            UPDATE_ID,
            UPDATE_DATE)
        VALUES
            (#{name,jdbcType=VARCHAR},
            #{nameSpell,jdbcType=VARCHAR},
            #{alias,jdbcType=VARCHAR},
            #{aliasSpell,jdbcType=VARCHAR},
            #{type,jdbcType=INTEGER},
            #{areaId,jdbcType=INTEGER},
            #{cityCode,jdbcType=VARCHAR},
            #{areaCode,jdbcType=VARCHAR},
            #{addr,jdbcType=VARCHAR},
            #{startTime,jdbcType=DATE},
            #{motto,jdbcType=VARCHAR},
            #{webSite,jdbcType=VARCHAR},
            #{phone,jdbcType=VARCHAR},
            #{feature,jdbcType=VARCHAR},
            #{lng,jdbcType=DECIMAL},
            #{lat,jdbcType=DECIMAL},
            #{unitPrice},
            #{salePrice},
            #{natureType,jdbcType=INTEGER},
            #{natureCity,jdbcType=INTEGER},
            #{schoolDegree,jdbcType=INTEGER},
            #{enrolDegree,jdbcType=INTEGER},
            #{imgDegree,jdbcType=INTEGER},
            #{status,jdbcType=TINYINT},
            #{createId,jdbcType=VARCHAR},
            #{createDate,jdbcType=DATE},
            #{updateId,jdbcType=VARCHAR},
            #{updateDate,jdbcType=DATE})
    </insert>
    <insert id="insertSelective" parameterType="com.jjshome.esf.common.entity.school.SchoolInfo">
        <selectKey resultType="Integer" keyProperty="id">
            SELECT LAST_INSERT_ID()
        </selectKey>
        INSERT INTO XQ_SCHOOL_INFO
        <trim prefix="(" suffix=")" suffixOverrides=",">
            <if test="name != null">
                NAME,
            </if>
            <if test="nameSpell != null">
                NAME_SPELL,
            </if>
            <if test="alias != null">
                ALIAS,
            </if>
            <if test="aliasSpell != null">
                ALIAS_SPELL,
            </if>
            <if test="type != null">
                TYPE,
            </if>
            <if test="areaId != null">
                AREA_ID,
            </if>
            <if test="cityCode != null">
                CITY_CODE,
            </if>
            <if test="areaCode != null">
                AREA_CODE,
            </if>
            <if test="addr != null">
                ADDR,
            </if>
            <if test="startTime != null">
                START_TIME,
            </if>
            <if test="motto != null">
                MOTTO,
            </if>
            <if test="webSite != null">
                WEB_SITE,
            </if>
            <if test="phone != null">
                PHONE,
            </if>
            <if test="feature != null">
                FEATURE,
            </if>
            <if test="lng != null">
                LNG,
            </if>
            <if test="lat != null">
                LAT,
            </if>
            <if test="UNIT_PRICE != null">
                UNIT_PRICE,
            </if>
            <if test="SALE_PRICE != null ">
                SALE_PRICE,
            </if>
            <if test="natureType != null">
                NATURE_TYPE,
            </if>
            <if test="natureCity != null">
                NATURE_CITY,
            </if>
            <if test="schoolDegree != null">
                SCHOOL_DEGREE,
            </if>
            <if test="enrolDegree != null">
                ENROL_DEGREE,
            </if>
            <if test="imgDegree != null">
                IMG_DEGREE,
            </if>
            <if test="status != null">
                STATUS,
            </if>
            <if test="createId != null">
                CREATE_ID,
            </if>
            <if test="createDate != null">
                CREATE_DATE,
            </if>
            <if test="updateId != null">
                UPDATE_ID,
            </if>
            <if test="updateDate != null">
                UPDATE_DATE,
            </if>
        </trim>
        <trim prefix="VALUES (" suffix=")" suffixOverrides=",">
            <if test="name != null">
                #{name,jdbcType=VARCHAR},
            </if>
            <if test="nameSpell != null">
                #{nameSpell,jdbcType=VARCHAR},
            </if>
            <if test="alias != null">
                #{alias,jdbcType=VARCHAR},
            </if>
            <if test="aliasSpell != null">
                #{aliasSpell,jdbcType=VARCHAR},
            </if>
            <if test="type != null">
                #{type,jdbcType=INTEGER},
            </if>
            <if test="areaId != null">
                #{areaId,jdbcType=INTEGER},
            </if>
            <if test="cityCode != null">
                #{cityCode,jdbcType=VARCHAR},
            </if>
            <if test="areaCode != null">
                #{areaCode,jdbcType=VARCHAR},
            </if>
            <if test="addr != null">
                #{addr,jdbcType=VARCHAR},
            </if>
            <if test="startTime != null">
                #{startTime,jdbcType=DATE},
            </if>
            <if test="motto != null">
                #{motto,jdbcType=VARCHAR},
            </if>
            <if test="webSite != null">
                #{webSite,jdbcType=VARCHAR},
            </if>
            <if test="phone != null">
                #{phone,jdbcType=VARCHAR},
            </if>
            <if test="feature != null">
                #{feature,jdbcType=VARCHAR},
            </if>
            <if test="lng != null">
                #{lng,jdbcType=DECIMAL},
            </if>
            <if test="lat != null">
                #{lat,jdbcType=DECIMAL},
            </if>
            <if test="unitPrice ! =null">
                #{unitPrice},
            </if>
            <if test="salePrice">
                #{salePrice},
            </if>
            <if test="natureType != null">
                #{natureType,jdbcType=INTEGER},
            </if>
            <if test="natureCity != null">
                #{natureCity,jdbcType=INTEGER},
            </if>
            <if test="schoolDegree != null">
                #{schoolDegree,jdbcType=INTEGER},
            </if>
            <if test="enrolDegree != null">
                #{enrolDegree,jdbcType=INTEGER},
            </if>
            <if test="imgDegree != null">
                #{imgDegree,jdbcType=INTEGER},
            </if>
            <if test="status != null">
                #{status,jdbcType=TINYINT},
            </if>
            <if test="createId != null">
                #{createId,jdbcType=VARCHAR},
            </if>
            <if test="createDate != null">
                #{createDate,jdbcType=DATE},
            </if>
            <if test="updateId != null">
                #{updateId,jdbcType=VARCHAR},
            </if>
            <if test="updateDate != null">
                #{updateDate,jdbcType=DATE},
            </if>
        </trim>
    </insert>
    <update id="updateSelective" parameterType="com.jjshome.esf.common.entity.school.SchoolInfo">
        UPDATE XQ_SCHOOL_INFO
        <set>
            <if test="name != null">
                NAME=#{name,jdbcType=VARCHAR},
            </if>
            <if test="nameSpell != null">
                NAME_SPELL=#{nameSpell,jdbcType=VARCHAR},
            </if>
            <if test="alias != null">
                ALIAS=#{alias,jdbcType=VARCHAR},
            </if>
            <if test="aliasSpell != null">
                ALIAS_SPELL=#{aliasSpell,jdbcType=VARCHAR},
            </if>
            <if test="type != null">
                TYPE=#{type,jdbcType=INTEGER},
            </if>
            <if test="type != null">
                AREA_ID=#{areaId,jdbcType=INTEGER},
            </if>

            <if test="cityCode != null">
                CITY_CODE=#{cityCode,jdbcType=VARCHAR},
            </if>
            <if test="areaCode != null">
                AREA_CODE=#{areaCode,jdbcType=VARCHAR},
            </if>
            <if test="addr != null">
                ADDR=#{addr,jdbcType=VARCHAR},
            </if>
            <if test="startTime != null">
                START_TIME=#{startTime,jdbcType=DATE},
            </if>
            <if test="motto != null">
                MOTTO=#{motto,jdbcType=VARCHAR},
            </if>
            <if test="webSite != null">
                WEB_SITE=#{webSite,jdbcType=VARCHAR},
            </if>
            <if test="phone != null">
                PHONE=#{phone,jdbcType=VARCHAR},
            </if>
            <if test="feature != null">
                FEATURE=#{feature,jdbcType=VARCHAR},
            </if>
            <if test="lng != null">
                LNG=#{lng,jdbcType=DECIMAL},
            </if>
            <if test="lat != null">
                LAT=#{lat,jdbcType=DECIMAL},
            </if>
            <if test="salePrice != null">
                UNIT_PRICE=#{unitPrice},
            </if>
            <if test="salePrice != null">
                SALE_PRICE=#{salePrice},
            </if>
            <if test="natureType != null">
                NATURE_TYPE=#{natureType,jdbcType=INTEGER},
            </if>
            <if test="natureCity != null">
                NATURE_CITY=#{natureCity,jdbcType=INTEGER},
            </if>
            <if test="schoolDegree != null">
                SCHOOL_DEGREE=#{schoolDegree,jdbcType=INTEGER},
            </if>
            <if test="enrolDegree != null">
                ENROL_DEGREE=#{enrolDegree,jdbcType=INTEGER},
            </if>
            <if test="imgDegree != null">
                IMG_DEGREE=#{imgDegree,jdbcType=INTEGER},
            </if>
            <if test="status != null">
                STATUS=#{status,jdbcType=TINYINT},
            </if>
            <if test="createId != null">
                CREATE_ID=#{createId,jdbcType=VARCHAR},
            </if>
            <if test="createDate != null">
                CREATE_DATE=#{createDate,jdbcType=DATE},
            </if>
            <if test="updateId != null">
                UPDATE_ID=#{updateId,jdbcType=VARCHAR},
            </if>
            <if test="updateDate != null">
                UPDATE_DATE=#{updateDate,jdbcType=DATE},
            </if>
            <if test="saleCount != null">
                SALE_COUNT=#{saleCount},
            </if>
        </set>
        WHERE
            ID = #{id,jdbcType=INTEGER}
    </update>
    <select id="selectList" parameterType="com.jjshome.esf.common.entity.school.SchoolInfo" resultMap="SchoolInfo">
        SELECT
            <include refid="Base_Column_List" />
        FROM
            XQ_SCHOOL_INFO
        WHERE
            STATUS = 1
            <if test="areaId != null and areaId != null"> AND AREA_ID = #{areaId} </if>

    </select>

    <select id="selectSchoolInfoAll" resultMap="SchoolInfo">
        SELECT
            <include refid="Base_Column_List" />
        FROM
            XQ_SCHOOL_INFO
        WHERE
            STATUS = 1
        ORDER BY ID DESC
    </select>

    <select id="selectSchoolInfo" parameterType="com.jjshome.esf.common.model.SchoolInfoSearchModel" resultMap="SchoolInfo">
        SELECT
            i.*,
            yc.NAME as 'CITY_NAME',
            ya.NAME as 'AREA_NAME'
        FROM
            XQ_SCHOOL_INFO i
            LEFT JOIN YW_CITY_SETTING yc ON i.CITY_CODE = yc.CODE
            LEFT JOIN YW_CITY_SETTING ya ON i.AREA_CODE = ya.CODE
        WHERE
            i.STATUS = 1
        <if test="city != null and city != '' ">
            AND i.CITY_CODE=#{city}
        </if>
        <if test="area != null and area != '' ">
            AND i.AREA_CODE=#{area}
        </if>
        <if test="schoolId != null and schoolId != ''">
            AND i.ID=#{schoolId}
        </if>

        <if test="schoolName != null and schoolName != ''">
            AND i.NAME LIKE concat('%',#{schoolName},'%')
        </if>

        <if test="schoolDistrictId != null and schoolDistrictId != ''">
            AND i.AREA_ID=#{schoolDistrictId}
        </if>
        <if test="schoolType != null and schoolType != '' ">
            AND i.TYPE=#{schoolType}
        </if>
        <if test="key != null and key != '' ">
            AND (i.NAME LIKE CONCAT('%',#{key},'%') OR  i.ALIAS LIKE CONCAT('%', #{key}, '%'))
        </if>
        /*priceType == 1：起售价 2：房源售均价*/
        <if test="priceType == 1">
            <if test="salePriceStart != null and salePriceStart != '' ">
                AND SALE_PRICE &gt;= #{salePriceStart}
            </if>
            <if test="salePriceEnd != null and salePriceEnd != '' ">
                AND SALE_PRICE &lt;= #{salePriceEnd}
            </if>
        </if>
        <if test="priceType == 2">
            <if test="salePriceStart != null and salePriceStart != '' ">
                AND UNIT_PRICE &gt;= #{salePriceStart}
            </if>
            <if test="salePriceEnd != null and salePriceEnd != '' ">
                AND UNIT_PRICE &lt;= #{salePriceEnd}
            </if>
        </if>
        <if test="perfectSituation == 1">
            AND SCHOOL_DEGREE = 100
        </if>
        <if test="perfectSituation == 2">
            AND SCHOOL_DEGREE &lt; 100
        </if>
        ORDER BY ID DESC

    </select>

    <select id="selectSchoolByNameAndCityAndArea" parameterType="java.util.Map" resultMap="SchoolInfo">
        SELECT
            <include refid="Base_Column_List" />
        FROM
            XQ_SCHOOL_INFO
        WHERE
            STATUS = 1
        AND NAME = #{name}
        AND CITY_CODE=#{city}
        AND AREA_CODE=#{area}
        AND TYPE = #{type}
    </select>

    <select id="selectAreaIdAndKeyWord" parameterType="java.util.Map" resultMap="SchoolInfo">
        SELECT
        XSI.*,CYCS.NAME AS  'CITY_NAME',AYCS.NAME AS  'AREA_NAME'
        FROM
            XQ_SCHOOL_INFO XSI
            LEFT JOIN YW_CITY_SETTING CYCS ON  XSI.CITY_CODE = CYCS.CODE
            LEFT JOIN YW_CITY_SETTING AYCS ON XSI.AREA_CODE = AYCS. CODE
        WHERE
            1=1
        <if test="areaId != null and areaId != ''">
            AND XSI.AREA_CODE=#{areaId}
        </if>
        <if test="key != null and key!=''">
            AND (XSI.NAME like CONCAT(#{key},'%' ) or XSI.NAME_SPELL like CONCAT(#{key},'%' ))
        </if>
        AND
        XSI.STATUS=1
        <if test="pageSize != null">
            limit #{pageSize}
        </if>
    </select>

    <select id="selectAreaIdList" parameterType="map" resultType="integer">
        SELECT DISTINCT AREA_ID FROM XQ_SCHOOL_INFO WHERE NAME LIKE CONCAT('%',#{schoolName},'%')
    </select>

    <select id="selectSchoolList" parameterType="map" resultMap="SchoolInfo">
        SELECT
        <include refid="Base_Column_List" />
        FROM
        XQ_SCHOOL_INFO
        WHERE
        STATUS = 1
        <if test="idList != null and idList.size gt 0">
            AND ID IN
            <foreach collection="idList"  item="item" index="index" open="(" close=")" separator=",">
                #{item}
            </foreach>
        </if>

        <if test="areaId != null and areaId != null"> AND AREA_ID = #{areaId} </if>

    </select>
</mapper>

原文地址：https://www.cnblogs.com/Jeremy2001/p/11123703.html