Mybatis

Question

我使用 mybatis 创建了一个新项目来连接到 mysql 数据库。这是我使用 mybatis 的第二个项目，所以我很熟悉它，但是当我调用保存方法时出现以下错误：

2019-03-05 10:08:01.031 错误 86438 --- [nio-9905-exec-1] c.q.f.r.c.ResolveRestController：启动预设时出错：绑定语句无效（未找到）：com.qlsdistribution.fps.resolverender.data.mybatis.mapper.ResolveJobReportMapper.saveResolveJobReport org.apache.ibatis.binding.BindingException：无效的绑定语句（未找到）：com.qlsdistribution.fps.resolverender.data.mybatis.mapper.ResolveJobReportMapper.saveResolveJobReport 在 org.apache.ibatis.binding.MapperMethod$SqlCommand.(MapperMethod.java:232) ~[mybatis-3.5.0.jar:3.5.0] 在 org.apache.ibatis.binding.MapperMethod.(MapperMethod.java:50) ~[mybatis-3.5.0.jar:3.5.0] 在 org.apache.ibatis.binding.MapperProxy.lambda$cachedMapperMethod$0(MapperProxy.java:62) ~[mybatis-3.5.0.jar:3.5.0] 在 java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_101] 在 org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:62) ~[mybatis-3.5.0.jar:3.5.0] .....

我的mybatis配置文件如下（在src/main/resources）：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>
    <settings>
        <!-- changes from the defaults -->
       <setting name="lazyLoadingEnabled" value="true" />
       <!-- Mybatis logging -->
       <setting name="logImpl" value="LOG4J2"/>
    </settings>
    <typeAliases>
        <package name="com.qlsdistribution.fps.resolverender.data.mybatis.domain"/>

    </typeAliases>

   <mappers>
      <mapper resource="mapper/ResolveJobReport.xml"/>
<!--       <mapper resource="com/qlsdistribution/fps/resolverender/data/mybatis/mapper/ResolveJobReport.xml"/> -->
   </mappers>
</configuration>

如您所见，我已经为映射器 xml 文件尝试了不同的位置，但是如果我在映射器 xml 文件中放置了无效的语法，它会因无效语法 (SAXParseException) 而失败，所以我知道正在读取映射器 xml 文件。

mapperxml文件如下（在src/main/resources/mapper）：

<?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.qlsdistribution.fps.resolverender.data.mybatis.ResolveJobReportMapper">

    <resultMap id="resolveJobReport" type="com.qlsdistribution.fps.resolverender.data.mybatis.domain.ResolveJobReport">
        <result property="id" column="id" />
        <result property="fpsProjectName" column="fps_project_name" />
        <result property="inputPath" column="input_path" />
        <result property="destinationPath" column="destination_path" />
        <result property="presetName" column="preset_name" />
        <result property="ipAddress" column="ip_address" />
        <result property="frameRate" column="frame_rate" />
        <result property="resolveProjectName" column="resolve_project_name" />
        <result property="width" column="width" />
        <result property="height" column="height" />
        <result property="renderFormat" column="render_format" />
        <result property="renderCodec" column="render_codec" />
        <result property="scriptPath" column="script_path" />
        <result property="cliOutput" column="cli_output" />
        <result property="jobStartedDate" column="job_started_date" />
        <result property="jobFinishedDate" column="job_finished_date" />
        <result property="createdBy" column="created_by" />
        <result property="createdDate" column="created_date" />
        <result property="modifiedBy" column="modified_by" />
        <result property="modifiedDate" column="modified_date" />
    </resultMap>

    <select id="getAllResolveJobReports" resultMap="resolveJobReport">
        SELECT id, fps_project_name, input_path, destination_path, preset_name, ip_address, frame_rate, resolve_project_name, width, height, 
        render_format, render_codec, script_path, cli_output, job_started_date, job_finished_date, created_by, created_date, modified_by, modified_date
        FROM resolve_job_report
        WHERE fps_setting_id = #{value}
        ORDER by id desc;
    </select>

    <select id="getAllResolveJobReportsById" parameterType="Long"  resultMap="resolveJobReport">
        SELECT id, fps_project_name, input_path, destination_path, preset_name, ip_address, frame_rate, resolve_project_name, width, height, 
        render_format, render_codec, script_path, cli_output, job_started_date, job_finished_date, created_by, created_date, modified_by, modified_date
        FROM resolve_job_report
        WHERE id = #{value};
    </select>

    <insert id="saveResolveJobReport" parameterType="com.qlsdistribution.fps.resolverender.data.mybatis.domain.ResolveJobReport">
        INSERT INTO resolve_job_report 
        (fps_project_name, input_path, destination_path, preset_name, ip_address, frame_rate, resolve_project_name, width, height, 
        render_format, render_codec, script_path, cli_output, job_started_date, job_finished_date, created_by)
        VALUE 
        (#{fpsProjectName},#{inputPath},#{destinationPath},#{presetName},#{ipAddress},#{frameRate},#{resolveProjectName},#{width},#{height},
        #{renderFormat},#{renderCodec}, #{scriptPath},#{cliOutput},#{jobStartedDate},#{jobFinishedDate},#{createdBy});
    </insert>

    <update id="updateResolveJobReportById" parameterType="resolveJobReport">
        UPDATE resolve_job_report
        SET
        fps_project_name = #{fpsProjectName}, 
        input_path = #{inputPath}, 
        destination_path = #{destinationPath}, 
        preset_name = #{presetName}, 
        ip_address = #{ipAddress}, 
        frame_rate = #{frameRate}, 
        resolve_project_name = #{resolveProjectName}, 
        width = #{width}, 
        height = #{height}, 
        render_format = #{renderFormat}, 
        render_codec = #{renderCodec}, 
        script_path = #{scriptPath}, 
        cli_output = #{cliOutput}, 
        job_started_date = #{jobStartedDate}, 
        job_finished_date = #{jobFinishedDate},
        modified_by = #{modifiedBy}
        where id = #{id};
    </update>

    <delete id="deleteResolveJobReporttById" parameterType="Long">
        DELETE FROM resolve_job_report
        WHERE id = #{value}
    </delete>
</mapper>

我的 application.properties 文件包含以下内容（在 (src/main/resources) 中）：

spring.datasource.url=jdbc:mysql://localhost:3306/fpsresolvetool?createDatabaseIfNotExist=true&autoReconnect=true&useSSL=false
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
spring.datasource.schema=classpath:schema.sql

mybatis.config-location=classpath:SqlMapConfig.xml

我什至尝试在我的 pom.xml:

中使用最新的 mybatis 版本

    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.0</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.0</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.0.0</version>
    </dependency>

我的spring引导程序如下：

@SpringBootApplication
@EnableScheduling
@ComponentScan({"com.qlsdistribution.fps.resolverender"})
@EnableJms
@MapperScan("com.qlsdistribution.fps.resolverender.data.mybatis")
public class FPSResolveRenderApp implements WebMvcConfigurer {
    /** UTF-8 Character set name */
    private static final String UTF_8 = "UTF-8";

    /** Logger */
    private static final Logger logger = LogManager.getLogger(FPSResolveRenderApp.class);

    public static void main(String[] args) {
        new SpringApplicationBuilder(FPSResolveRenderApp.class).run(args);

    }

    /**
     * Creates and gets the FilterRegistrationBean
     * @return
     */
    @Bean
    public FilterRegistrationBean<CharacterEncodingFilter> filterRegistrationBean() {
        FilterRegistrationBean<CharacterEncodingFilter> registrationBean = new FilterRegistrationBean<CharacterEncodingFilter>();
        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
        characterEncodingFilter.setEncoding(UTF_8);
        registrationBean.setFilter(characterEncodingFilter);
        return registrationBean;
    }
}

mapper界面如下：

@Mapper
public interface ResolveJobReportMapper {

    public List<ResolveJobReport> getAllResolveJobReports();

    public List<ResolveJobReport> getAllResolveJobReports(RowBounds rowBounds);

    public List<ResolveJobReport> getAllResolveJobReportsById(Long id);

    public List<ResolveJobReport> getAllResolveJobReportsById(Long id, RowBounds rowBounds);

    public void saveResolveJobReport(ResolveJobReport resolveJobReport);

    public void updateResolveJobReportById(ResolveJobReport resolveJobReport);

    public void deleteResolveJobReporttById(Long id);

}

而服务class如下：

@Service("ResolveJobReportService")
public class ResolveJobReportService {

    @Autowired
    private ResolveJobReportMapper resolveJobReportMapper= null;

    public List<ResolveJobReport> getAllResolveJobReports() {
        return resolveJobReportMapper.getAllResolveJobReports();
    }

    public List<ResolveJobReport> getAllResolveJobReports(RowBounds rowBounds) {
        return resolveJobReportMapper.getAllResolveJobReports();
    }

    public List<ResolveJobReport> getAllResolveJobReportsById(Long id) {
        return resolveJobReportMapper.getAllResolveJobReportsById(id);
    }

    public List<ResolveJobReport> getAllResolveJobReportsById(Long id, RowBounds rowBounds) {
        return resolveJobReportMapper.getAllResolveJobReportsById(id);
    }

    public void saveResolveJobReport(ResolveJobReport resolveJobReport) {
        resolveJobReportMapper.saveResolveJobReport(resolveJobReport);
    }

    public void updateResolveJobReportById(ResolveJobReport resolveJobReport) {
        resolveJobReportMapper.updateResolveJobReportById(resolveJobReport);
    }

    public void deleteResolveJobReporttById(Long id) {
        resolveJobReportMapper.deleteResolveJobReporttById(id);
    }

}

谁能看出哪里出了问题。

Answer 1

出现问题是因为映射器xml中的namespace是com.qlsdistribution.fps.resolverender.data.mybatis.ResolveJobReportMapper，但是映射器接口的包是com.qlsdistribution.fps.resolverender.data.mybatis.mapper.ResolveJobReportMapper。

要修复它，请确保它们匹配。

Answer 2

当我将我的项目从 JavaFX 项目更改为 Maven 项目时，我收到了相同的错误消息。

我不得不将所有 xml 映射器文件移动到资源文件夹。之后，工作正常。

Answer 3

我最近遇到了这个问题，并检查了所有可以在互联网上找到的东西。花了我一整天。

最后我把 xml 文件和接口 java 文件放在同一个地方，问题就解决了。

我认为这是因为某些原因无法找到 xml 文件，将它们放在那里使它们可见。

Answer 4

我遇到了同样的问题

对我来说，修复是为 java（映射器接口 class）和相应的 xml 文件

提供相同的文件名

Answer 5

对于那些在 spring 启动项目中没有 xml 使用 MyBatis 的人：

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>

请检查您的 spring 引导应用程序 class，确保您的 @MapperScan 与您的 dao 软件包匹配。

@MapperScan("com.jjs.videoservice.dao")

路径必须与您的 dao 包相同（包含您的映射器接口），我忽略了“dao”并导致了问题。

希望对大家有所帮助，谢谢

Answer 6

放在application.propertiesmybatis.mapper-locations=classpath*:**/mappers/*Mapper.xml

Answer 7

我在同一个包中有 2 个映射器。这是问题的根本原因。将每个映射器接口移动到单独的包后，问题就解决了。

Answer 8

在我的例子中，我为映射器和 java class 使用了相同的名称，但是 mapper.xml 中的映射指向了错误的 java class

Mybatis - 无效的绑定语句（未找到）

Mybatis - Invalid bound statement (not found)

spring-boot