IDEA写mybatis程序，java.io.IOException:Could not find resource mybatis-config.xml

找不到mybatis-config.xml

尝试maven idea:module，不是模块构造问题
尝试检验pom.xml，在编译模块添加了解析resources内容依旧不行

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>org.example</groupId><artifactId>untitled1</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target></properties><dependencies><!-- MyBatis的jar包配置 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.4.5</version></dependency><!-- MySQL驱动包的配置 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.30</version> <!-- 更新为与你的MySQL服务器版本兼容的版本 --></dependency></dependencies><!-- 配置以下信息，是src/main/java目录下有xml文件 --><build><resources><resource><directory>src/main/java</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>false</filtering></resource><resource><directory>src/main/resources</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>false</filtering></resource></resources></build>
</project>

再回看一下源代码

package com.mybatis.test;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;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.mybatis.po.MyUser;
public class MyBatisTest {public static void main(String[] args) {try {InputStream config = Resources.getResourceAsStream("mybatis-config.xml");SqlSessionFactory ssf = new SqlSessionFactoryBuilder().build(config);SqlSession ss = ssf.openSession();MyUser mu = ss.selectOne("com.mybatis.mapper.UserMapper.selectUserById", 1);System.out.println(mu);MyUser addmu = new MyUser();addmu.setUname("张三");addmu.setUsex("男");ss.insert("com.mybatis.mapper.UserMapper.addUser",addmu);MyUser updatemu = new MyUser();updatemu.setUid(1);updatemu.setUname("杨婉莹");updatemu.setUsex("女");ss.update("com.mybatis.mapper.UserMapper.updateUser", updatemu);ss.delete("com.mybatis.mapper.UserMapper.deleteUser", 3);List<MyUser> listMu = ss.selectList("com.mybatis.mapper.UserMapper.selectAllUser");for (MyUser myUser : listMu) {System.out.println(myUser);}ss.commit();ss.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}
}

关键在于找到resource

   InputStream config = Resources.getResourceAsStream("mybatis-config.xml");

在网上也有resource目录突然罢工不生效，也就是检测不到resource目录，这边也是层级的问题
需要把resource目录设置为资源根目录，这本应该是创建项目时默认的，但是失效了我们需要重新设置一下

右键resources目录将目录标记为测试资源根目录，当图标右下角出现三条黄色横杠时就成功了。