今日进度：

1.按照

http://www.cnblogs.com/baipeng/p/5743501.html

中的实例完成了操作，但是并不能链接数据库，第一次报错

是配置文件名称错误导致的。在resource下重新创建mybits-config.xml文件。

这次报错较为复杂，

### Error building SqlSession.

### The error may exist in SQL Mapper Configuration

### Cause: org.apache.ibatis.builder.

BuilderException:Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.'

BuilderException: Error registering typeAlias for 'Student'. Cause: java.lang.

ClassNotFoundException: Cannot find class: com.mybatis3.com.mybatis3.domain.Student

先对错误进行理解：

###sql配置出现问题

###错误可能出现在SQLmapper配置文件中

###

生成失误：SQL Mapper 设置：生成错误

生成错误：错误的别名字符：Student

错误：没有找到类：com.mybatis3.com.mybatis3.domain.Student

改正：先对照结构表和mapper.xml将类改成：

com.mybatis3.mappers.Student

检查Mapper的别名部分：

将划中部分更改

仍然存在错误：

### Error building SqlSession.

### The error may exist in com/mybatis3/mappers/StudentMapper.xml

### Cause: org.apache.ibatis.builder.

BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource     com/mybatis3/mappers/StudentMapper.xml

不能找到StudentMapper.xml

=-=缺少一个s。。。。。

然后再更改，继续error：

org.apache.ibatis.exceptions.PersistenceException: 

### Error building SqlSession.

### Cause: org.apache.ibatis.builder.

BuilderException: Error creating document instance.  Cause: org.xml.sax.SAXParseException; lineNumber: 22; columnNumber: 17; 元素类型为 "configuration" 的内容必须匹配 "(properties?,settings?,typeAliases?,typeHandlers?,objectFactory?,objectWrapperFactory?,reflectorFactory?,plugins?,environments?,databaseIdProvider?,mappers?)"。

应该是mapper.xml中缺少文件导致的：

导入了网址

http://blog.csdn.net/hloach/article/details/68491677

http://blog.csdn.net/yqynsmile/article/details/52807815

中的setting和properties依然error。

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <properties resource="log4j.properties"/>
    <settings>
        <setting name="logImpl" value="LOG4J"/>
    </settings>
    <settings>
        <setting name="cacheEnabled" value="true"/>
    </settings>
    <settings>
        <setting name="multipleResultSetsEnabled" value="true" />
    </settings>
    <settings>
        <setting name="useColumnLabel" value="true" />
    </settings>
    <settings>
        <setting name="useGeneratedKeys" value="false" />
    </settings>
    <settings>
        <setting name="autoMappingBehavior" value="PARTIAL" />
    </settings>
    <settings>
        <setting name="defaultStatementTimeout" value="25000" />
    </settings>
    <settings>
        <setting name="defaultExecutorType" value="SIMPLE" />
    </settings>
    <settings>
        <setting name="safeRowBoundsEnabled" value="false" />
    </settings>
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="false" />
    </settings>


    <typeAliases>
        <typeAlias alias="Student" type="com.mybatis3.domain.Student" />
    </typeAliases>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis1" />
                <property name="username" value="root" />
                <property name="password" value="Woshiainide.99" />
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="com/mybatis3/mappers/StudentMapper.xml" />
    </mappers>

</configuration>

<settings>
<setting name="lazyLoadingEnabled" value="true" />//是否是懒记载
</settings>

org.apache.ibatis.exceptions.PersistenceException: 

### Error building SqlSession.

### Cause: org.apache.ibatis.builder.BuilderException: Error creating document instance.  Cause: org.xml.sax.SAXParseException; lineNumber: 56; columnNumber: 17; 元素类型为 "configuration" 的内容必须匹配 "(properties?,settings?,typeAliases?,typeHandlers?,objectFactory?,objectWrapperFactory?,reflectorFactory?,plugins?,environments?,databaseIdProvider?,mappers?)"。

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.mybatis3.util.MyBatisSqlSessionFactory.getSqlSessionFactory(MyBatisSqlSessionFactory.java:22)

at com.mybatis3.util.MyBatisSqlSessionFactory.openSession(MyBatisSqlSessionFactory.java:33)

at com.mybatis3.services.Studentservices.findAllStudents(Studentservices.java:20)

at com.mybatis3.services.StudentServiceTest.testFindAllStudents(StudentServiceTest.java:25)

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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)

at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)

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.builder.BuilderException: Error creating document instance.  Cause: org.xml.sax.SAXParseException; lineNumber: 56; columnNumber: 17; 元素类型为 "configuration" 的内容必须匹配 "(properties?,settings?,typeAliases?,typeHandlers?,objectFactory?,objectWrapperFactory?,reflectorFactory?,plugins?,environments?,databaseIdProvider?,mappers?)"。

at org.apache.ibatis.parsing.XPathParser.createDocument(XPathParser.java:259)

at org.apache.ibatis.parsing.XPathParser.<init>(XPathParser.java:125)

at org.apache.ibatis.builder.xml.XMLConfigBuilder.<init>(XMLConfigBuilder.java:82)

at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:77)

... 29 more

Caused by: org.xml.sax.SAXParseException; lineNumber: 56; columnNumber: 17; 元素类型为 "configuration" 的内容必须匹配 "(properties?,settings?,typeAliases?,typeHandlers?,objectFactory?,objectWrapperFactory?,reflectorFactory?,plugins?,environments?,databaseIdProvider?,mappers?)"。

at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)

at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)

at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:396)

at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)

at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:284)

at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java:1994)

at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java:879)

at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)

at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2967)

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:257)

... 32 more

明日任务：

补完xxxxmapper.xml的配置，今天被bug卡死了

问题和收获：

问题在上，求师兄指导一个方向。

收获是：看的再多不如动手实在，提前看很多可以在操作的时候提供一些思路但是遇到bug仍然无法解决，所以尽快动手才是根本。

对mabits的理解更加深入了。