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jar中没有主清单属性【解决办法】

            </div><div class="up-time"><span>最后发布：2020-03-25 11:07:40</span><span>首次发布：2020-03-25 11:07:40</span></div><div class="slide-content-box"><div class="all-tags-box"></div><div class="article-copyright"><div class="creativecommons"><a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"></a></div><div class="creativecommons">版权声明：本文为博主原创文章，遵循<a href="http://creativecommons.org/licenses/by-sa/4.0/" target="_blank" rel="noopener"> CC 4.0 BY-SA </a>版权协议，转载请附上原文出处链接和本声明。                            </div><div class="article-source-link">本文链接：<a href="https://blog.csdn.net/bluewelkin/article/details/105090413">https://blog.csdn.net/bluewelkin/article/details/105090413</a></div></div></div><div class="operating"><a class="href-article-edit slide-toggle">版权</a></div></div></div>
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    <build>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
 
    </build>

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-03-25 14:08:26.904 logback [main] ERROR o.s.boot.SpringApplication - Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.apache.ibatis.type.TypeException: The alias 'EmployeeRegisterDao' is already mapped to the value 'com.hy.oa.dao.redis.employee.EmployeeRegisterDao'.
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:607)

 Error creating bean with name 'sqlSessionFactory' defined in class path resource 

注释掉下面就好了

## 所有POJO类所在包路径
#mybatis.type-aliases-package=com.hy.oa.dao
#
## mapper映射文件
#mybatis.mapper-locations=classpath*:/sql/**/*.xml

有的时候还不行，要加上下面这个
java运行jar命令提示没有主清单属性 -
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.6.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

最终解决方案2020年7月5日

 
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

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