java - 生成文件中的 MyBatis 异常

Question

我使用 MyBatis Generator 1.3.1 创建了一个 Mapper.xml 文件。 MyBatis解析Mapper文件时，会抛出BuilderException:

Exception in thread "main" org.apache.ibatis.builder.BuilderException: Unknown element <#comment> in SQL statement.
    at org.apache.ibatis.builder.xml.XMLStatementBuilder.parseDynamicTags(XMLStatementBuilder.java:83)
    at org.apache.ibatis.builder.xml.XMLStatementBuilder.parseStatementNode(XMLStatementBuilder.java:43)
    at org.apache.ibatis.session.Configuration.parseStatementNodes(Configuration.java:513)
    at org.apache.ibatis.session.Configuration.buildStatementsForNamespace(Configuration.java:502)
    at org.apache.ibatis.session.Configuration.buildStatementsFromId(Configuration.java:467)
    at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:391)
    at org.apache.ibatis.binding.MapperMethod.setupCommandType(MapperMethod.java:160)
    at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:48)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:37)
    at $Proxy1.selectByExample(Unknown Source)

parseDynamicTags 无法识别 <#comment> 字段。它正在解析的 XML 部分是 selectByExample:

  <select id="selectByExample" resultMap="BaseResultMap" parameterType="test.model.TblPosStageExample" >
    <!--       WARNING - @mbggenerated  ..  -->
    select
    <if test="distinct" >
      distinct
    </if>
    <include refid="Base_Column_List" />
    from tbl_Pos_Stage
    <if test="_parameter != null" >
      <include refid="Example_Where_Clause" />
    </if>
    <if test="orderByClause != null" >
      order by ${orderByClause}
    </if>
  </select>

MyBatis 似乎已经解析了第一条注释和 select 语句。它刚刚解析了 #text 类型的节点，但我不确定 #comment 来自哪里。

我没有修改生成的文件，我很困惑它过去运行正常，但突然停止了。

<小时/>

编辑:Base_column_list

  <sql id="Base_Column_List" >
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
      This element was generated on Wed Mar 23 08:04:42 EST 2011.
    -->
    SurrogatePK, businessDate, positionId, busAIdCode, {95 columns deleted for brevity}
    marketValueCcy, settledMarketValueCcy
  </sql>

这是 example_where_clause

<sql id="Example_Where_Clause" >
  <!--
    WARNING - @mbggenerated
    This element is automatically generated by MyBatis Generator, do not modify.
    This element was generated on Wed Mar 23 08:04:42 EST 2011.
  -->
  <where >
    <foreach collection="oredCriteria" item="criteria" separator="or" >
    <if test="criteria.valid" >
      <trim prefix="(" suffix=")" prefixOverrides="and" >
      <foreach collection="criteria.criteria" item="criterion" >
        <choose >
        <when test="criterion.noValue" >
          and ${criterion.condition}
        </when>
        <when test="criterion.singleValue" >
          and ${criterion.condition} #{criterion.value}
        </when>
        <when test="criterion.betweenValue" >
          and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
        </when>
        <when test="criterion.listValue" >
          and ${criterion.condition}
          <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
          #{listItem}
          </foreach>
        </when>
        </choose>
      </foreach>
      </trim>
    </if>
    </foreach>
  </where>
</sql>

Answer 1

我已经弄清楚是什么原因导致了这个问题。 (与myBatis生成过程无关。)

当我将实用程序包添加到 Eclipse 构建路径时出现问题，其中包括具有许多旧包的第三方库。我怀疑有问题的包是旧的 org.apache.xerces.parsers。

我通过从头开始构建 Eclipse 项目并一次添加一个包和代码来发现该错误。

运行时错误(SQL 语句中的未知元素 <#comment>)可以通过添加项目来重现，并通过从构建路径中删除项目来消除。