IBatis项目中com.ibatis.common.xml.NodeletException的解决方案

一 现象:

今天在写IBatis项目是总是提示我有如下异常:

com.ibatis.common.xml.NodeletException

java.util.NoSuchElementException

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: com.ibatis.common.xml.NodeletException: Error parsing XML.  Cause: java.lang.RuntimeException: Error parsing XPath '/sqlMap/insert'.  Cause: java.util.NoSuchElementException
    at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser.parse(SqlMapConfigParser.java:89)
    at com.ibatis.sqlmap.client.SqlMapClientBuilder.buildSqlMapClient(SqlMapClientBuilder.java:63)
    at org.lyk.main.Hello.main(Hello.java:25)
Caused by: com.ibatis.common.xml.NodeletException: Error parsing XML.  Cause: java.lang.RuntimeException: Error parsing XPath '/sqlMapConfig/sqlMap'.  Cause: com.ibatis.common.xml.NodeletException: Error parsing XML.  Cause: java.lang.RuntimeException: Error parsing XPath '/sqlMap/insert'.  Cause: java.util.NoSuchElementException
    at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:53)
    at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser.parse(SqlMapConfigParser.java:86)
    ... 2 more
Caused by: java.lang.RuntimeException: Error parsing XPath '/sqlMapConfig/sqlMap'.  Cause: com.ibatis.common.xml.NodeletException: Error parsing XML.  Cause: java.lang.RuntimeException: Error parsing XPath '/sqlMap/insert'.  Cause: java.util.NoSuchElementException
    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: com.ibatis.common.xml.NodeletException: Error parsing XML.  Cause: java.lang.RuntimeException: Error parsing XPath '/sqlMap/insert'.  Cause: java.util.NoSuchElementException
    at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:53)
    at com.ibatis.sqlmap.engine.builder.xml.SqlMapParser.parse(SqlMapParser.java:51)
    at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser$11.process(SqlMapConfigParser.java:410)
    at com.ibatis.common.xml.NodeletParser.processNodelet(NodeletParser.java:121)
    ... 7 more
Caused by: java.lang.RuntimeException: Error parsing XPath '/sqlMap/insert'.  Cause: java.util.NoSuchElementException
    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)
    ... 10 more
Caused by: java.util.NoSuchElementException
    at java.util.StringTokenizer.nextToken(StringTokenizer.java:349)
    at com.ibatis.sqlmap.engine.mapping.parameter.InlineParameterMapParser.parseInlineParameterMap(InlineParameterMapParser.java:55)
    at com.ibatis.sqlmap.engine.builder.xml.SqlStatementParser.parseDynamicTags(SqlStatementParser.java:240)
    at com.ibatis.sqlmap.engine.builder.xml.SqlStatementParser.processSqlStatement(SqlStatementParser.java:204)
    at com.ibatis.sqlmap.engine.builder.xml.SqlStatementParser.parseGeneralStatement(SqlStatementParser.java:120)
    at com.ibatis.sqlmap.engine.builder.xml.SqlMapParser$19.process(SqlMapParser.java:563)
    at com.ibatis.common.xml.NodeletParser.processNodelet(NodeletParser.java:121)
    ... 14 more

二 原因

该问题是由于我的mapping文件语法错误导致的：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE sqlMap
    PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
    "http://ibatis.apache.org/dtd/sql-map-2.dtd">
<sqlMap namespace="NewsNS">
    <typeAlias alias="News" type="org.lyk.vo.News" />
    <insert id="doCreate" parameterClass="News">
        INSERT INTO news(title,pub_date,content) VALUES
        (#title,#pubdate,#content)
        <selectKey resultClass="Integer" keyProperty="nid">
            SELECT LAST_INSERT_ID()
        </selectKey>
    </insert>
</sqlMap>

注意mapping文件的红色部分，语法是错误的，正确的语法是在title、pubdate、content的前面和后面都要用井号包裹：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE sqlMap
    PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
    "http://ibatis.apache.org/dtd/sql-map-2.dtd">
<sqlMap namespace="NewsNS">
    <typeAlias alias="News" type="org.lyk.vo.News" />
    <insert id="doCreate" parameterClass="News">
        INSERT INTO news(title,pub_date,content) VALUES
        (#title#,#pubdate#,#content#)
        <selectKey resultClass="Integer" keyProperty="nid">
            SELECT LAST_INSERT_ID()
        </selectKey>
    </insert>
</sqlMap>

三 解决方案

修改mapping文件，将变量前面和后面都用井号(#)包围。