普通Maven项目打成jar包遇到的坑

柔光的暖阳◎ 2022-11-21 04:28 205阅读 0赞

1，maven项目打成jar包后，启动时提示“没有主清单属性”  
![在这里插入图片描述][20201030174512888.png_pic_center]  
原因是没有指定启动类，打包生成的MANIFEST.MF文件中没有Main-Class  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyNTEyNDUz_size_16_color_FFFFFF_t_70_pic_center]  
尝试了网上帖子的很多方法都没有用，很多说idea中指定Artifacts的启动类就行，然并没毛用  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyNTEyNDUz_size_16_color_FFFFFF_t_70_pic_center 1]  
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2，项目中有依赖第三方jar包，打成jar包后运行提示没有依赖的类

3，我提供一下pom.xml文件中的配置，这样打成的jar包指定了启动类也将依赖包打进去了。

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
    
      <groupId>com.flink</groupId>
      <artifactId>flinkTest</artifactId>
      <version>1.0-SNAPSHOT</version>
    
      <dependencies>
        <dependency>
          <groupId>org.apache.flink</groupId>
          <artifactId>flink-streaming-java_2.11</artifactId>
          <version>1.10.0</version>
        </dependency>
        <dependency>
          <groupId>org.apache.flink</groupId>
          <artifactId>flink-connector-kafka-0.10_2.11</artifactId>
          <version>1.10.0</version>
        </dependency>
        <dependency>
          <groupId>org.apache.flink</groupId>
          <artifactId>flink-cep-scala_2.11</artifactId>
          <version>1.10.0</version>
        </dependency>
      </dependencies>
    
      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      </properties>
    
      <build>
        <plugins>
          <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.2</version>
            <configuration>
              <source>1.8</source>
              <target>1.8</target>
              <encoding>UTF-8</encoding>
            </configuration>
          </plugin>
    
          <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <configuration>
              <appendAssemblyId>false</appendAssemblyId>
              <descriptorRefs>
                <descriptorRef>jar-with-dependencies</descriptorRef>
              </descriptorRefs>
              <archive>
                <manifest>
                  <mainClass>com.flink.App</mainClass>
                </manifest>
              </archive>
            </configuration>
            <executions>
              <execution>
                <id>make-assembly</id>
                <phase>package</phase>
                <goals>
                  <goal>assembly</goal>
                </goals>
              </execution>
            </executions>
          </plugin>
    
          <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.AppendingTransformer">
                      <resource>reference.conf</resource>
                    </transformer>
                  </transformers>
                </configuration>
              </execution>
            </executions>
          </plugin>
        </plugins>
      </build>
    
    </project>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyNTEyNDUz_size_16_color_FFFFFF_t_70_pic_center 2]  
依赖的插件都是需要的，否则运行时也会提示错误

[20201030174512888.png_pic_center]: /images/20221120/547e7e8a3262421c94d72772c940d690.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyNTEyNDUz_size_16_color_FFFFFF_t_70_pic_center 2]: https://img-blog.csdnimg.cn/20201030175450792.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyNTEyNDUz,size_16,color_FFFFFF,t_70#pic_center