我正在使用 MyBatis 3.0.5,我在将映射器作为资源加载时遇到问题。我在 Windows 7 64 上,我使用 Eclipse Indigo 64bit 和 jdk7 64。MyBatis 在 Grizzly Web 容器(其中使用 jersey 框架实现的休息服务)独立实例中初始化。
<mappers>
<mapper
url="file:///C:/Users/andrea/workspace/soap2rest/src/main/java/com/izs/mybatis/FormMapper.xml" />
<mapper resource="src/main/java/com/izs/mybatis/FormMapper.xml" />
</mappers>
我有相同的映射器仅用于测试,第一个已加载,第二个不起作用。错误:
org.apache.ibatis.exceptions.PersistenceException:
### Error building SqlSession.
### The error may exist in src/main/java/com/izs/mybatis/FormMapper.xml
### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource src/main/java/com/izs/mybatis/FormMapper.xml
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:8)
at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:32)
at com.izs.Main.initMyBatis(Main.java:114)
at com.izs.Main.main(Main.java:80)
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource src/main/java/com/izs/mybatis/FormMapper.xml
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:85)
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:69)
at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:30)
... 2 more
Caused by: java.io.IOException: Could not find resource src/main/java/com/izs/mybatis/FormMapper.xml
at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:89)
at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:76)
at org.apache.ibatis.builder.xml.XMLConfigBuilder.mapperElement(XMLConfigBuilder.java:253)
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:83)
... 4 more
Exception in thread "main" java.lang.NullPointerException
at com.izs.Main.initMyBatis(Main.java:122)
at com.izs.Main.main(Main.java:80)
对不起我的英语不好。
解决方案: Maven 项目需要资源到 src/main/resources 和 src/test/resources 进行测试。所以解决方案是将xml映射器放入这些文件夹中。