org.apache.ibatis.binding.bindingexception: invalid bound statement (not found)

问题:  springboot 集成 mybatis-plus 3.4.2 报错 org.apache.ibatis.binding.bindingexception: invalid bound statement (not found)

场景: 

 多模块的 spring boot 项目:

blog-admin         后台管理模块
blog-common    公共方法工具模块
blog-dao            实体类 和 dao层
blog-service       service模块

application.yml

mybatis-plus:
  mapper-locations: classpath*:com/wenhe/blogdao/mapper/mapping/**.xml
  type-aliases-package: com.wenhe.blogdao.model
  global-config:
    db-config:
      id-type: AUTO  #0:数据库ID自增   1:用户输入id  2:全局唯一id(IdWorker)  3:全局唯一ID(uuid)
      logic-delete-value: 0
      logic-not-delete-value: 1
  configuration:
    map-underscore-to-camel-case: false
    cache-enabled: true #配置的缓存的全局开关
    lazyLoadingEnabled: true #延时加载的开关
    multipleResultSetsEnabled: true #开启的话，延时加载一个属性时会加载该对象全部属性，否则按需加载属性

blog-dao 实体类 和 dao层   pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.wenhe</groupId>
        <artifactId>blog</artifactId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <groupId>com.wenhe</groupId>
    <artifactId>blog-dao</artifactId>
    <version>${blog.version}</version>
    <name>blog-dao</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-generator -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.4.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.4.5</version>
            </plugin>
        </plugins>
    </build>
</project>

mybatis plus 的  *.xml  的路径 在   src/main/java/com/wenhe/blogdao/mapper/mapping  下, 不在 resources 目录 下

然后写了个 

ArticleMapper.java

package com.wenhe.blogdao.mapper;

import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.wenhe.blogdao.model.Article;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.springframework.data.repository.query.Param;

import java.util.List;
import java.util.Map;

/**
 * <p>
 * 文章表 Mapper 接口
 * </p>
 *
 * @author Erwin Feng
 * @since 2021-06-16
 */
public interface ArticleMapper extends BaseMapper<Article> {
    List<Map<String,Object>> selectListPage(@Param("page") Page<Article> page, @Param("article")Article article, @Param("keyword")String keyword);
}

ArticleMapper.xml

<?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.wenhe.blogdao.mapper.ArticleMapper">
    <resultMap id="BaseResultMap" type="com.wenhe.blogdao.model.Article">
        <id column="article_id" jdbcType="INTEGER" property="articleId" />
        <result column="ac_id" jdbcType="INTEGER" property="acId" />
        <result column="article_url" jdbcType="VARCHAR" property="articleUrl" />
        <result column="article_show" jdbcType="BIT" property="articleShow" />
        <result column="article_abstract" jdbcType="VARCHAR" property="articleAbstract" />
        <result column="article_sort" jdbcType="TINYINT" property="articleSort" />
        <result column="article_title" jdbcType="VARCHAR" property="articleTitle" />
        <result column="article_time" jdbcType="INTEGER" property="articleTime" />
        <result column="article_state" jdbcType="TINYINT" property="articleState" />
        <result column="delete_time" jdbcType="TIMESTAMP" property="deleteTime" />
    </resultMap>
    <sql id="Base_Column_List">
    article_id, ac_id, article_url, article_show, article_abstract, article_sort, article_title,
    article_time, article_state, article_author, article_image, article_keyword, article_click,
    article_type, article_modify_time, article_tag, article_comment_count, allow_comment,
    article_origin, is_hot, is_best, is_new, type_id, delete_time
  </sql>
    <select id="selectListPage" resultType="map" parameterType="com.wenhe.blogdao.model.Article">
        select  * from bk_article a
        <trim prefix="WHERE" prefixOverrides="AND">
        <if test="article.articletitle != null and article.articletitle != ''">
            AND  <![CDATA[a.article_title like CONCAT('%',#{article.articletitle},'%') ]]>
        </if>
        <if test="article.isDelete != null">
            AND  (isNull(a.delete_time ) = false or a.delete_time > '0000-00-00 00:00:00')
        </if>
        </trim>
        ORDER BY a.article_id desc
    </select>
</mapper>

然后运行测试方法 后  报错   org.apache.ibatis.binding.bindingexception: invalid bound statement (not found)

解决方案

 原因:   ArticleMapper.xml  不在  resources  目录下 (  在   src/main/java/com/wenhe/blogdao/mapper  下 mybatis-plus 里配置的是 mapper-locations: classpath*:com/wenhe/blogdao/mapper/mapping/**.xml ) 而  classpath 的默认路径是  resources  目录, 所以  找不到  ArticleMapper.xml   报错

解决:

<!--解决IDEA构建项目时，target/classes目录下不存在mapper.xml 映射文件-->
 <!-- 第一种-->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.*</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.*</include>
                </includes>
            </resource>
        </resources>
    </build>
     <!-- 第二种-->
	 <build>
        <resources>
            <resource>
                <directory>${basedir}/src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>

网上搜的 解决方法 1  

我的问题 不是一下情况造成的

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found)问题，即在mybatis中dao接口与mapper配置文件在做映射绑定的时候出现问题，简单说，就是接口与xml要么是找不到，要么是找到了却匹配不到。

截图为网络中搜索到的常见原因：

照着修改之后，问题依旧存在。最终花费了好大的力气才找到自己代码问题的根源。dao接口与xml的文件名不一致。

接口名与接口文件名都是DepartmentDao, 而配置文件名为DeparmentDao.xml，费了很大的劲才看到两者名字查一个t字母。修改后就一切正常了。

这是一个很容易忽视的点，记住：接口名与Mybatis的映射文件名一定要一模一样。