Caused by: org.apache.ibatis.exceptions.PersistenceException: ### Error building SqlSession.

Caused by: org.apache.ibatis.exceptions.PersistenceException: 
### Error building SqlSession.

解决办法

1、配置文件中有中文注释,去掉就好

2、将配置文件中的encoding="UTF-8"更改为encoding="UTF8"(去掉-)

java.lang.ExceptionInInitializerError at com.ecommerce.mapper.UserMapperTest.openSession(UserMapperTest.java:30) at java.base/java.lang.reflect.Method.invoke(Method.java:580) at java.base/java.util.ArrayList.forEach(ArrayList.java:1596) at java.base/java.util.ArrayList.forEach(ArrayList.java:1596) Suppressed: java.lang.NoClassDefFoundError: Could not initialize class com.ecommerce.utils.MyBatisUtils at com.ecommerce.mapper.UserMapperTest.closeSession(UserMapperTest.java:93) ... 3 more Caused by: java.lang.ExceptionInInitializerError: Exception 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.datasource.DataSourceException: Unknown DataSource property: poolInitialSize [in thread "main"] 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.ecommerce.utils.MyBatisUtils.<clinit>(MyBatisUtils.java:34) at com.ecommerce.mapper.UserMapperTest.openSession(UserMapperTest.java:30) ... 3 more 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.datasource.DataSourceException: Unknown DataSource property: poolInitialSize 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.ecommerce.utils.MyBatisUtils.<clinit>(MyBatisUtils.java:34) ... 4 more Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.datasource.DataSourceException: Unknown DataSource property: poolInitialSize at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:133) at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:110) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:80) ... 6 more Caused by: org.apache.ibatis.datasource.DataSourceException: Unknown DataSource property: poolInitialSize at org.apache.ibatis.datasource.unpooled.UnpooledDataSourceFactory.setProperties(UnpooledDataSourceFactory.java:55) at org.apache.ibatis.builder.xml.XMLConfigBuilder.dataSourceElement(XMLConfigBuilder.java:354) at org.apache.ibatis.builder.xml.XMLConfigBuilder.environmentsElement(XMLConfigBuilder.java:308) at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:128) ... 8 more
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