今天在做mybatis项目的时候，给映射文件添加了中文注释后，程序就报错。把中文注释删除后，程序又可以正常执行。解决方法在下文提到。

我的xml映射文件如下：

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE mapper

        PUBLIC "-//mybatis.orggetStudent//DTD Config 3.0//EN"

        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.kuang.dao.StudentMapper">

<!--方式一-->

    <select id="getStudent" resultMap="StudentTeacher">

        SELECT * FROM student

    </select>

    <select id="getTeacher" resultType="Teacher">

        SELECT * FROM teacher where id = #{tid}

    </select>

    <resultMap id="StudentTeacher" type="Student">

        <result property="id" column="id"/>

        <result property="name" column="name"/>

        <association property="teacher" column="tid" javaType="Teacher" select="getTeacher"/>

    </resultMap>

<!--方式二-->

    <select id="getStudent2" resultMap="StudentTeacher2">

        SELECT s.id sid,s.name sname,t.name tname

        FROM student s,teacher t

        WHERE s.tid = t.id

    </select>

    <resultMap id="StudentTeacher2" type="Student">

        <result property="id" column="sid"/>

        <result property="name" column="sname"/>

        <association property="teacher" javaType="Teacher">

            <result property="name" column="tname"/>

        </association>

    </resultMap>

</mapper>

报错信息如下：

Logging initialized using 'class org.apache.ibatis.logging.stdout.StdOutImpl' adapter.

Class not found: org.jboss.vfs.VFS

JBoss 6 VFS API is not available in this environment.

Class not found: org.jboss.vfs.VirtualFile

VFS implementation org.apache.ibatis.io.JBoss6VFS is not valid in this environment.

Using VFS adapter org.apache.ibatis.io.DefaultVFS

Find JAR URL: file:/D:/IdeaProjects/Mybatis-Study/mybatis-06/target/classes/com/kuang/pojo

Not a JAR: file:/D:/IdeaProjects/Mybatis-Study/mybatis-06/target/classes/com/kuang/pojo

Reader entry: Student.class

Reader entry: Teacher.class

Listing file:/D:/IdeaProjects/Mybatis-Study/mybatis-06/target/classes/com/kuang/pojo

Find JAR URL: file:/D:/IdeaProjects/Mybatis-Study/mybatis-06/target/classes/com/kuang/pojo/Student.class

Not a JAR: file:/D:/IdeaProjects/Mybatis-Study/mybatis-06/target/classes/com/kuang/pojo/Student.class

Reader entry: ����   1 [

Find JAR URL: file:/D:/IdeaProjects/Mybatis-Study/mybatis-06/target/classes/com/kuang/pojo/Teacher.class

Not a JAR: file:/D:/IdeaProjects/Mybatis-Study/mybatis-06/target/classes/com/kuang/pojo/Teacher.class

Reader entry: ����   1 I

Checking to see if class com.kuang.pojo.Student matches criteria [is assignable to Object]

Checking to see if class com.kuang.pojo.Teacher matches criteria [is assignable to Object]

PooledDataSource forcefully closed/removed all connections.

PooledDataSource forcefully closed/removed all connections.

PooledDataSource forcefully closed/removed all connections.

PooledDataSource forcefully closed/removed all connections.

java.lang.ExceptionInInitializerError

    at MyTest.getStudent(MyTest.java:14)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke(Method.java:498)

    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)

    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)

    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)

    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)

    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)

    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)

    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)

    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)

    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)

    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)

    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)

    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)

    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)

    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

Caused by: org.apache.ibatis.exceptions.PersistenceException:

### Error building SqlSession.

### The error may exist in com/kuang/dao/StudentMapper.java (best guess)

### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error creating document instance.  Cause: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: 3 字节的 UTF-8 序列的字节 3 无效。

    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)

    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:80)

    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:64)

    at com.kuang.utils.MybatisUtils.<clinit>(MybatisUtils.java:19)

    ... 23 more

Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error creating document instance.  Cause: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: 3 字节的 UTF-8 序列的字节 3 无效。

    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:121)

    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:98)

    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:78)

    ... 25 more

Caused by: org.apache.ibatis.builder.BuilderException: Error creating document instance.  Cause: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: 3 字节的 UTF-8 序列的字节 3 无效。

    at org.apache.ibatis.parsing.XPathParser.createDocument(XPathParser.java:260)

    at org.apache.ibatis.parsing.XPathParser.<init>(XPathParser.java:126)

    at org.apache.ibatis.builder.xml.XMLMapperBuilder.<init>(XMLMapperBuilder.java:80)

    at org.apache.ibatis.builder.xml.XMLMapperBuilder.<init>(XMLMapperBuilder.java:75)

    at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.loadXmlResource(MapperAnnotationBuilder.java:181)

    at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parse(MapperAnnotationBuilder.java:129)

    at org.apache.ibatis.binding.MapperRegistry.addMapper(MapperRegistry.java:72)

    at org.apache.ibatis.session.Configuration.addMapper(Configuration.java:775)

    at org.apache.ibatis.builder.xml.XMLConfigBuilder.mapperElement(XMLConfigBuilder.java:382)

    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:119)

    ... 27 more

Caused by: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: 3 字节的 UTF-8 序列的字节 3 无效。

    at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.invalidByte(UTF8Reader.java:701)

    at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(UTF8Reader.java:435)

    at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(XMLEntityScanner.java:1895)

    at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.scanData(XMLEntityScanner.java:1375)

    at com.sun.org.apache.xerces.internal.impl.XMLScanner.scanComment(XMLScanner.java:801)

    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanComment(XMLDocumentFragmentScannerImpl.java:1034)

    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2982)

    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)

    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)

    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:841)

    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:770)

    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)

    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)

    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339)

    at org.apache.ibatis.parsing.XPathParser.createDocument(XPathParser.java:258)

    ... 36 more

上网上找了很多解决方案，最终找到解决方法：

就是把文件头部的编码由UTF-8改为GBK编码，修改完后程序就能正常运行了！

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