iBatis 解析 XPath '/sqlMapConfig/sqlMap' 时出错

Question

我是 ibatis 的新手。我喜欢将 SQLMapConfig 文件和 SQL 映射资源拆分为 2 个文件。但当我运行该项目时，它似乎显示错误。 下面是我的 2 个文件 SQL 映射。

1. SQLMapConfig.xml：

   <?xml version="1.0" encoding="UTF-8" ?>
   <!DOCTYPE sqlMapConfig PUBLIC "-//iBATIS.com//DTD SQL Map Config 
     2.0//EN" "http://www.ibatis.com/dtd/sql-map-config-2.dtd">
   <sqlMapConfig>
      <settings
       cacheModelsEnabled="true"
       enhancementEnabled="true"
       lazyLoadingEnabled="true"
       maxRequests="32"
       maxSessions="10"
       maxTransactions="5"
       useStatementNamespaces="false"
      />
   
     <transactionManager type="JDBC" >
       <dataSource type="DBCP">
         <property name="JDBC.Driver" value="com.mysql.jdbc.Driver"/>
         <property name="JDBC.ConnectionURL" value="jdbc:mysql://localhost:3306/sms_converter"/>
         <property name="JDBC.Username" value="root"/>
         <property name="JDBC.Password" value=""/>
       </dataSource>
     </transactionManager>
     <sqlMap resource="configuration/db/tbluser.xml" />
   </sqlMapConfig>
   

这是 SQL Map 资源 tbluser.xml :

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE sqlMap PUBLIC "-//iBATIS.com//DTD SQL Map 2.0//EN" "http://www.ibatis.com/dtd/sql-map-2.dtd">
<sqlMap namespace="MUser">
    <select id="getUserById" parameterClass = "com.me.bean.MUser" resultClass="com.me.bean.MUser">
        SELECT user_id AS sUserId FROM users where user.id = #sUserId#
    </select>
</sqlMap>

但是在我运行该项目后，我遇到了这个错误：

Exception in thread "main" java.lang.RuntimeException: Error occurred.  Cause: com.ibatis.common.xml.NodeletException: Error parsing XML.  Cause: java.lang.RuntimeException: Error parsing XPath '/sqlMapConfig/sqlMap'.  Cause: java.io.IOException: Could not find resource configuration/db/tbluser.xml
    at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser.parse(SqlMapConfigParser.java:49)
    at com.ibatis.sqlmap.client.SqlMapClientBuilder.buildSqlMapClient(SqlMapClientBuilder.java:63)
    at com.me.dao.DBDao.main(DBDao.java:77)
Caused by: com.ibatis.common.xml.NodeletException: Error parsing XML.  Cause: java.lang.RuntimeException: Error parsing XPath '/sqlMapConfig/sqlMap'.  Cause: java.io.IOException: Could not find resource configuration/db/tbluser.xml
    at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:53)
    at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser.parse(SqlMapConfigParser.java:46)
    ... 2 more
Caused by: java.lang.RuntimeException: Error parsing XPath '/sqlMapConfig/sqlMap'.  Cause: java.io.IOException: Could not find resource configuration/db/tbluser.xml
    at com.ibatis.common.xml.NodeletParser.processNodelet(NodeletParser.java:123)
    at com.ibatis.common.xml.NodeletParser.process(NodeletParser.java:84)
    at com.ibatis.common.xml.NodeletParser.process(NodeletParser.java:102)
    at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:72)
    at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:51)
    ... 3 more
Caused by: java.io.IOException: Could not find resource configuration/db/tbluser.xml
    at com.ibatis.common.resources.Resources.getResourceAsStream(Resources.java:110)
    at com.ibatis.common.resources.Resources.getResourceAsStream(Resources.java:95)
    at com.ibatis.common.resources.Resources.getResourceAsReader(Resources.java:161)
    at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser$10.process(SqlMapConfigParser.java:262)
    at com.ibatis.common.xml.NodeletParser.processNodelet(NodeletParser.java:121)
    ... 7 more

有人可以帮助我吗？谢谢。

Answer 1

找不到资源配置/db/tbluser.xml，所以尝试添加前缀类路径：

<mapper resource="classpath:configuration/db/tbluster.xml">

Answer 2

尝试使用

<typeAlias alias="classMUser" type="com.me.bean.MUser" />

<resultMap id="userMap" class="classMUser">
    <result property="sUserId" column="sUserId" />
</resultMap>

<select id="getUserById" parameterClass = "com.me.bean.MUser" resultMap="userMap">
    SELECT user_id AS sUserId FROM users where user.id = #sUserId#
</select>

Answer 3

就我而言，问题是：

<select id="someId" parameterClass="hashmap"
    resultClass="someResultClass" resultMap="someResultMap">

我在 resultMap 中写了“hashmap”而不是“someResultMap”。

纠正此问题解决了编译问题。