MyBatis memorandum

I will write a memorandum of MyBatis.

IF statement

<if test="(author != null and author.name != '') or authorList.size() > 0">
</if>

IN clause

column in
<foreach item="sample" open="(" close=")" collection="sampleList" separator=",">
  #{sample}
</foreach>

When using the inequality sign "<"

<![CDATA[
  column <= #{parameter}
]]>

When binding a parameter as a DATE type

column = #{parameter,jdbcType=DATE}

include

<sql id="sample">
  column = True
<sql>

<select id="xxxxx" resultType="string">
  select column from table where <include refid="sample" />
</select>

resultType

If the result is a List, resultType specifies the type of the contents of the List. If you want to get it as List \ type, write resultType = "string".

Bulk Insert

<insert id="xxxxx" parameterType="java.util.List">
  insert into table(column,・ ・ ・) values
  <foreach collection="list" item="item" separator=",">
  ( #{item.propertyName}, #{item.propertyName},・ ・ ・)
  </foreach>
</insert> 

Bulk Update

<update id="xxxxx" parameterType="java.util.List">
  <foreach collection="list" item="item" separator=";">
  update table set column = #{item.propertyName} where column = #{item.propertyName}
  </foreach>
</update> 

jdbcType

alias

"java.lang.String" can be written as "string". http://www.mybatis.org/mybatis-3/ja/configuration.html#typeAliases

How to specify parameters of Java Mapper interface

void select(
        @Param("param1") String param1,
        @Param("param2") List<String> param2);

For Mapper XML, write parameterType = "map".

How to create a search condition (Criteria)

TableExample example = new TableExample();
example.createCriteria()
        .andColumnEqualTo(value)
        .andColumnEqualTo(value);

example.setOrderByClause("column DESC, column ASC");