src.main.java.com.taotao.pojo VS com.taotao.pojo

src.main.java.com.taotao.pojo  VS     com.taotao.pojo

一,前言:

  

     有些问题看似很简单, 但是有时一下没有想到或没能解决或有的同学没遇到过,就会变得非常的尴尬,但也不要着急,最好的办法就是: 站在巨人的肩膀上.

二,问题

   这次在引入实体时,硬是引入不对,总是报错. 

命名实体位置是在:  com.taotao.pojo 中, 但是引入包是却出现src.main.java.com.taotao.pojo

三,详情

  1,分析情况,这是因为引入包的方式不对,一, pom中可能没有引入自己; 二, pom可能实体的依赖不对.

  2,解决方案:

在 pom 中, 必须引入自己的同时,也要有对其他包的依赖.

3,原理:

   Mapper 依赖 pojo

   Service 要依赖 mapper

   Web 要依赖 Service

4,具体的代码:

1,taotao-manager-pojo:

<projectxmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
    </dependencies>
    <parent>
        <groupId>com.taotao</groupId>
        <artifactId>taotao-manager</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <artifactId>taotao-manager-pojo</artifactId>
</project>

2,taotao-manager-mapper

<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>
    <parent>
        <groupId>com.taotao</groupId>
        <artifactId>taotao-manager</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <artifactId>taotao-manager-mapper</artifactId>
    <!-- 依赖管理 -->
    <dependencies>
        <dependency>
            <groupId>com.taotao</groupId>
            <artifactId>taotao-manager-pojo</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <!-- Mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
        </dependency>
        <dependency>
            <groupId>com.github.miemiedev</groupId>
            <artifactId>mybatis-paginator</artifactId>
        </dependency>
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
        </dependency>
        <!-- MySql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
    </dependencies>
    <!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>
</project>

3,taotao-manager-service

<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>
    <parent>
        <groupId>com.taotao</groupId>
        <artifactId>taotao-manager</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <artifactId>taotao-manager-service</artifactId>
    <!-- 依赖管理 -->
    <dependencies>
        <dependency>
            <groupId>com.taotao</groupId>
            <artifactId>taotao-manager-mapper</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
        </dependency>
    </dependencies>
</project>

4,taotao-mapper-web

<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>
   <parent>
      <groupId>com.taotao</groupId>
      <artifactId>taotao-manager</artifactId>
      <version>0.0.1-SNAPSHOT</version>
   </parent>
   <artifactId>taotao-manager-web</artifactId>
   <packaging>war</packaging>
   <!-- 依赖管理 -->
   <dependencies>
      <dependency>
         <groupId>com.taotao</groupId>
         <artifactId>taotao-manager-service</artifactId>
         <version>0.0.1-SNAPSHOT</version>
      </dependency>
      <!-- JSP相关 -->
      <dependency>
         <groupId>jstl</groupId>
         <artifactId>jstl</artifactId>
      </dependency>
      <dependency>
         <groupId>javax.servlet</groupId>
         <artifactId>servlet-api</artifactId>
         <scope>provided</scope>
      </dependency>
      <dependency>
         <groupId>javax.servlet</groupId>
         <artifactId>jsp-api</artifactId>
         <scope>provided</scope>
      </dependency>
      <!-- 文件上传组件 -->
      <dependency>
         <groupId>commons-fileupload</groupId>
         <artifactId>commons-fileupload</artifactId>
      </dependency>

      <!--swagger-->
      <dependency>
         <groupId>io.springfox</groupId>
         <artifactId>springfox-swagger2</artifactId>
         <version>2.5.0</version>
      </dependency>

      <dependency>
         <groupId>io.springfox</groupId>
         <artifactId>springfox-swagger-ui</artifactId>
         <version>2.5.0</version>
      </dependency>

   </dependencies>
</project>

四,小结:

   山不在高,有仙则灵;水不在深,有龙则灵.  问题或bug 不一定要非常的困难,高级, 只要是我们成长中遇到的,我们花时间了,最后通过自己也解决了,这就是一个成长.

     原和读者您互相交流,共同学习,共同进步.