“线程中的异常”；“主要”；更改Gradle项目的文件夹结构时出现java.lang.ExceptionInInitializerError错误

build.gradle

package com.myBatis.service;

import java.io.IOException;
import java.io.InputStream;

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

public class MyBatisUtil {

    private static SqlSessionFactory sqlSessionFactory;

    static {

        String resource = "mybatis-config.xml";

        InputStream inputStream;

        try {

            inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

        } catch (IOException e) {

            e.printStackTrace();
        }
    }

    public static SqlSessionFactory getSqlSessionFactory() {

        return sqlSessionFactory;
    }
}

我的项目目录多包版本

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'war'
archivesBaseName = 'myBatis'
version = '1' 
repositories {
    mavenCentral()
}
dependencies {
    compile 'org.mybatis:mybatis:3.2.8'
    compile 'mysql:mysql-connector-java:5.1.34'
} 

myBatis
    -src/main/java
        -com.myBatis.api
            -Village.java
        -com.myBatis.Dao
            -VillageDao.java
        -com.myBatis.service
            -MyBatisUtil.java
            -RunMyBatis.java
    -src/main/resources
        -com.myBatis.mapper
            -VillageMapper.xml
        -mybatis-config.xml

我的项目目录单包版本

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'war'
archivesBaseName = 'myBatis'
version = '1' 
repositories {
    mavenCentral()
}
dependencies {
    compile 'org.mybatis:mybatis:3.2.8'
    compile 'mysql:mysql-connector-java:5.1.34'
} 

myBatis
    -src/main/java
        -com.myBatis.api
            -Village.java
        -com.myBatis.Dao
            -VillageDao.java
        -com.myBatis.service
            -MyBatisUtil.java
            -RunMyBatis.java
    -src/main/resources
        -com.myBatis.mapper
            -VillageMapper.xml
        -mybatis-config.xml

---

问题出在mybatis config.xml中

Exception in thread "main" java.lang.ExceptionInInitializerError
    at com.myBatis.Dao.VillageDAO.save(VillageDAO.java:14)
    at com.myBatis.service.RunMybatis.main(RunMybatis.java:17)
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 'village'. Cause: java.lang.ClassNotFoundException: Cannot find class: com.myBatis.mapper.Village
    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:82)
    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:66)
    at com.myBatis.service.MyBatisUtil.<clinit>(MyBatisUtil.java:23)
    ... 2 more
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error registering typeAlias for 'village'. Cause: java.lang.ClassNotFoundException: Cannot find class: com.myBatis.mapper.Village
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:109)
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:92)
    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:80)
    ... 4 more
Caused by: org.apache.ibatis.builder.BuilderException: Error registering typeAlias for 'village'. Cause: java.lang.ClassNotFoundException: Cannot find class: com.myBatis.mapper.Village
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.typeAliasesElement(XMLConfigBuilder.java:130)
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:99)
    ... 6 more
Caused by: java.lang.ClassNotFoundException: Cannot find class: com.myBatis.mapper.Village
    at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:190)
    at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:89)
    at org.apache.ibatis.io.Resources.classForName(Resources.java:256)
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.typeAliasesElement(XMLConfigBuilder.java:123)
    ... 7 more

<?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.myBatis.mapper.VillageMapper" >
    <resultMap id="villageResult" type="village">
        <id property="id" column="id" />
        <result property="name" column="name"/>
        <result property="district" column="district"/>
    </resultMap>
    <select id="selectVillage" resultType="village" parameterType="int" resultMap="villageResult">
        SELECT id, name, district from village WHERE id = #{id}
    </select>
    <insert id="insertVillage" parameterType="village"  keyProperty="id" useGeneratedKeys="true">
        INSERT into village(name,district) VALUES(#{name}, #{district})         
    </insert>
    <update id="updateVillage" parameterType="village">
        UPDATE village SET name=#{name}, district =#{district} WHERE id =#{id}          
    </update>
    <delete id="deleteVillage" parameterType="int">
        DELETE FROM village WHERE id =#{id}         
    </delete>
</mapper>

    myBatis
        -src/main/java
            -com.myBatis.api
                -Village.java
                -VillageDao.java
                -MyBatisUtil.java
                -RunMyBatis.java
        -src/main/resources
                -com.myBatis.mapper
                    -VillageMapper.xml
                -mybatis-config.xml

---

你能附加build.gradle吗？我已经附加了build.gradle。请现在查看。谢谢。您还可以将目录结构附加到

src/main/java

single-package-version和split-version下吗？您的

build.gradle

非常简单，错误日志显示它找不到

com.myBatis.mapper.Village

，因此目录结构可能与此问题有关。我已经更新了它，请查看@tkhmThanks以获取支持@tkhm

<typeAlias type="com.myBatis.api.Village" alias="village"/>

package com.myBatis.Dao;


import org.apache.ibatis.session.SqlSession;

import com.myBatis.api.Village;
import com.myBatis.service.MyBatisUtil;


public class VillageDAO {

    public void save(Village village) {

        SqlSession session  = MyBatisUtil.getSqlSessionFactory().openSession();
        session.insert("com.myBatis.mapper.VillageMapper.insertVillage", village);
        session.commit();
        session.close();
    }

    public void update(Village village) {

        SqlSession session  = MyBatisUtil.getSqlSessionFactory().openSession();
        session.update("com.myBatis.mapper.VillageMapper.updateVillage", village);
        session.commit();
        session.close();
    }

    public void delete(Integer id) {

        SqlSession session  = MyBatisUtil.getSqlSessionFactory().openSession();
        session.delete("com.myBatis.mapper.VillageMapper.deleteVillage", id);
        session.commit();
        session.close();
    }

    public Village getData(Integer id) {

        SqlSession session  = MyBatisUtil.getSqlSessionFactory().openSession();
        Village village     = session.selectOne("com.myBatis.mapper.VillageMapper.selectVillage", id);
        session.close();
        return village;
    }
}