java.lang.ClassNotFoundException: org.apache.ibatis.session.SqlSession

报错

java.lang.ClassNotFoundException: org.apache.ibatis.session.SqlSession

或者

java.lang.ClassNotFoundException: org.mybatis.spring.SqlSessionFactoryBean

很明显 都是因为类找不到:SqlSession 这个类或者 SqlSessionFactoryBean找不到

解决方法:

整合ssm时忘记加上mybatis依赖以及mybatis-spring

org.mybatis mybatis-spring ${mybatis-spring.version} org.mybatis mybatis ${mybatis.version}

版本使用的是:

<mybatis.version>3.4.1</mybatis.version>
<mybatis-spring.version>1.3.0</mybatis-spring.version>

``` package com.hrl.test; import com.hrl.pojo.Book; 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 java.io.IOException; import java.io.InputStream; import java.util.List; public class Test { public static void main(String[] args) throws IOException { //指定核心配置文件的路径: String resource = "mybatis.xml"; //获取配置文件的输入流: InputStream inputStream = Resources.getResourceAsStream(resource); //加载配置文件,创造工厂类 SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); //通过工厂类获取一个会话: SqlSession sqlSession = sqlSessionFactory.openSession(); //执行查询: List list = sqlSession.selectList("a.b.selectAllBook"); //遍历: for (int i = 0; i <= list.size(); i++) { Book b = (Book) list.get(i); System.out.println(b.getName() + "---" + b.getAuthor()); } //关闭资源: sqlSession.close(); } }```Exception in thread "main" 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 resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias ''. Cause: java.lang.ClassNotFoundException: Cannot find class: at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:82) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:66) at com.hrl.test.Test.main(Test.java:20)
04-01
``` package com.hrl.test; import com.hrl.pojo.Book; 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 java.io.IOException; import java.io.InputStream; import java.util.List; public class Test { public static void main(String[] args) throws IOException { //指定核心配置文件的路径: String resource = "mybatis.xml"; //获取配置文件的输入流: InputStream inputStream = Resources.getResourceAsStream(resource); //加载配置文件,创造工厂类 SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); //通过工厂类获取一个会话: SqlSession sqlSession = sqlSessionFactory.openSession(); //执行查询: List list = sqlSession.selectList("a.b.selectAllBook"); //遍历: for (int i = 0; i <= list.size(); i++) { Book b = (Book) list.get(i); System.out.println(b.getName() + "---" + b.getAuthor()); } //关闭资源: sqlSession.close(); } }```Exception in thread "main" 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 resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias ''. Cause: java.lang.ClassNotFoundException: Cannot find class:
04-01
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