import com.tyhxzy.entity.User; import com.tyhxzy.mapper.UserMApper; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.junit.Test; import sun.security.util.Resources; import java.io.InputStream; import java.util.List; public class mybatis { @Test public void chaxun(){ InputStream inputStream = Resources.getResourceAsSteream("mybatis-config.xml"); SqlSessionFactoryBuilder builder=new SqlSessionFactoryBuilder (); SqlSessionFactory sqlSessionFactory=builder.build ( inputStream ); SqlSession con=sqlSessionFactory.openSession (); UserMApper cc=con.getMapper ( UserMApper.class ); List<User> list=cc.findall (); for (User item:list){ System.out.println (item); } } }哪里错了

您的代码存在几个问题：

1. `Resources` 类在当前 Java 版本中已经被废弃，建议使用其他替代方案。

2. `SqlSessionFactoryBuilder` 类的 `build()` 方法需要传入一个 `Reader` 类型的参数，而您传入的是 `InputStream` 类型的参数，需要将其转换为 `Reader` 类型。

3. `mybatis-config.xml` 文件需要放置在类路径下，以便正确读取。

下面是修改后的代码示例：

import com.tyhxzy.entity.User;
import com.tyhxzy.mapper.UserMapper;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.nio.charset.StandardCharsets;

public class MyBatisTest {

    @Test
    public void test() throws IOException {
        InputStream inputStream = getClass().getClassLoader().getResourceAsStream("mybatis-config.xml");
        Reader reader = new java.io.InputStreamReader(inputStream, StandardCharsets.UTF_8);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
        List<User> userList = userMapper.findAll();
        for (User user : userList) {
            System.out.println(user);
        }
        sqlSession.close();
    }
}