### The error may exist in SQL Mapper Configuration

[mtw512123]

Exception in thread "main" java.lang.ExceptionInInitializerError
at com.serv.test.<clinit>(test.java:6)
Caused by: org.apache.ibatis.exceptions.PersistenceException:
### 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 'userModel'. Cause: java.lang.ClassNotFoundException: Cannot find class: com/model/userModel
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:52)
at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:36)
at com.util.userUtil.<clinit>(userUtil.java:21)
... 1 more
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error registering typeAlias for 'userModel'. Cause: java.lang.ClassNotFoundException: Cannot find class: com/model/userModel
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:121)
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:99)
at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:50)
... 3 more
Caused by: org.apache.ibatis.builder.BuilderException: Error registering typeAlias for 'userModel'. Cause: java.lang.ClassNotFoundException: Cannot find class: com/model/userModel
at org.apache.ibatis.builder.xml.XMLConfigBuilder.typeAliasesElement(XMLConfigBuilder.java:171)
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:109)
... 5 more
Caused by: java.lang.ClassNotFoundException: Cannot find class: com/model/userModel
at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:200)
at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:89)
at org.apache.ibatis.io.Resources.classForName(Resources.java:261)
at org.apache.ibatis.builder.xml.XMLConfigBuilder.typeAliasesElement(XMLConfigBuilder.java:164)
... 6 more

结构如下

userModel.java

package com.model;

public class userModel {
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	
	private String name;
	private String password;
	
	public String toString(){
		return "name:"+name+",password="+password;
	}
}

userOperation.java

package com.impl;

import java.util.Map;

public interface userOperation {
	public int user_insert(Map map);
}

test.java

package com.serv;

import com.util.userUtil;

public class test {
	static userUtil userUtil=new userUtil();
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		userUtil.user_insert("add", "dbbb");
	}

}

userUtil.java

package com.util;

import java.io.IOException;
import java.io.Reader;
import java.util.HashMap;
import java.util.Map;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import com.impl.userOperation;

public class userUtil {
	private static SqlSessionFactory sqlSessionFactory;
	private static Reader reader;
	static{
		try {
			reader=Resources.getResourceAsReader("com/conf/dbconf.xml");
			sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	public void user_insert(String name,String password) {
		SqlSession sqlSession=sqlSessionFactory.openSession();
		int query_msg=0;
		Map map=new HashMap();
		map.put("name", name);
		map.put("password", password);
		try {
			userOperation userOperation=sqlSession.getMapper(userOperation.class);
			query_msg=userOperation.user_insert(map);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			sqlSession.commit();
			sqlSession.close();
		}
		System.out.println("user_insert:"+query_msg);
	}
}

dbconf.xml

<?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="com/conf/config.properties"></properties>
	<typeAliases>
		<typeAlias alias="userModel" type="com/model/userModel" />
	</typeAliases>

	<environments default="development">
		<environment id="development">
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="${driver}" />
				<property name="url" value="${url}" />
				<property name="username" value="${name}" />
				<property name="password" value="${password}" />
			</dataSource>
		</environment>
	</environments>
	<mappers>
		<mapper resource="com/conf/userdb.xml" />
	</mappers>
</configuration>

config.properties

driver=com.mysql.jdbc.Driver
url=jdbc\:mysql\://localhost\:3306/mybatis_new_test
name=root
password=root

userdb.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.impl.userOperation">
	<insert id="user_insert" parameterType="Map">
		insert into user(name,password) values(#{name},#{password})
	</insert>
</mapper>

[mtw512123]

用myeclipse创建的java项目，mybatis的配置文件检查了好几遍，没找到哪问题，求帮助

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[ostools]

Error registering typeAlias for 'userModel'. Cause: java.lang.ClassNotFoundException: Cannot find class: com/model/userModel 清理下项目看看，跟userModel相关的文件都去看看

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[mtw512123]

使用断点检测 在 userUtil 中的 21行 sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader); 出现问题

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[星星的愿望56789]

<typeAlias alias="userModel" type="com.model.userModel" /> 不是都是这样写的吗 <typeAlias alias="userModel" type="com/model/userModel" /> 这样子也可以吗

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[mtw512123]

只定义一个user_insert 方法，除了在dbconf.xml文件中有给userModel的路径取别名外，其他的文件都与userModel无关联

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[mtw512123]

<typeAlias alias="userModel" type="com/model/userModel" /> 嗯，错了，弄混了

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