创建一个maven项目，在本地工程依赖jar包启动完成后，是不够的，还需将项目文件使用maven编译打包然后部署到服务器上
主流的springboot项目打包的时候需要在pom文件中指定主方法等配置
解决打包部署的时候报错no main manifest attribute, in ..jar
<build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><includeSystemScope>true</includeSystemScope></configuration></plugin><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.apache.maven.plugins</groupId><artifactId>maven-surefire-plugin</artifactId><configuration><skipTests>true</skipTests></configuration></plugin><!--解决打包部署报错no main manifest attribute, in 。。。jar--><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><mainClass>com.csrcb.AppStart</mainClass></configuration><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin><plugin><!--热部署配置--><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><!--fork：如果没有该项配置，整个devtools不会起效果--><fork>true</fork></configuration></plugin></plugins></build>然后使用cmd指令或者在idea
使用指令
mvn clean
然后执行mvn package指令
mvn package
打包好的jar包在target目录下，然后打开文件路径
找到打包好的jar包放到服务器上，然后执行指令，最好在执行命令中增加编码格式UTF-8，即-Dfile.encoding=UTF-8
java -jar springboot_demo-1.0-SNAPSHOT.jar//最好使用当然配置其余的虚拟机参数也在启动脚本中配置
//java -jar -Dfile.encoding=UTF-8 springboot_demo-1.0-SNAPSHOT.jar前提服务器安装有jdk
普通的java项目若不包含spring项目，可以在pom.xml文件中使用下面的配置进行打包，对应的启动类改下即可
<build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.8.1</version><configuration><source>1.8</source><target>1.8</target></configuration></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-surefire-plugin</artifactId><version>2.12.4</version><configuration><forkMode>once</forkMode><argLine>-Dfile.encoding=UTF-8</argLine></configuration></plugin><!--将依赖jar包打入最终需要打的包中,使用maven指令mvn package--><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-shade-plugin</artifactId><executions><execution><phase>package</phase><goals><goal>shade</goal></goals><configuration><transformers><transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"><mainClass>com.csrcb.AppStart</mainClass></transformer></transformers></configuration></execution></executions></plugin><!--使用此方法打包是不是使用mvn package指令，而是mvn assembly:assembly指令--><!--<plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-assembly-plugin</artifactId><version>2.5.5</version><configuration><archive><manifest><mainClass>com.csrcb.AppStart</mainClass></manifest></archive><descriptorRefs><descriptorRef>jar-with-dependencies</descriptorRef></descriptorRefs></configuration></plugin>--></plugins></build>若打包过程中出现了编码GBK的不可映射字符报错
依旧在pom文件中添加配置指定编码集utf-8
<properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties> 
