在集成测试期间，我使用 spring-boot-maven-plugin 来启动我的 spring 应用程序：
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<id>start-spring-boot</id>
<phase>pre-integration-test</phase>
<goals>
<goal>start</goal>
</goals>
</execution>
<execution>
<id>stop-spring-boot</id>
<phase>post-integration-test</phase>
<goals>
<goal>stop</goal>
</goals>
</execution>
</executions>
</plugin>
现在我想将 JaCoCo 代理添加到执行中，但将其作为代理或 jvmarguments 添加到配置中不起作用。开始时我总是看到：
[INFO] --- spring-boot-maven-plugin:2.2.4.RELEASE:start (start-spring-boot) @ tosca-ui ---
[INFO] Attaching agents: []
如何将 JaCoCo 与 spring-boot-maven-plugin 一起使用？
默认情况下，Spring Boot Maven 插件会创建一个分支，并且必须显式指定代理配置。可以通过设置来完成<agents><agent>...</agent></agents>Spring Boot Maven 插件中的配置属性，但它不适用于 Jacoco，因为没有惯用的方法来找出代理 jar 文件的确切路径。
相反，你可以通过argLineJacoco 设置为 Spring Boot Maven 插件 JVM 参数的变量：
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<jvmArguments>${argLine}</jvmArguments>
</configuration>
<executions>
<execution>
<id>start-spring-boot</id>
<phase>pre-integration-test</phase>
<goals>
<goal>start</goal>
</goals>
</execution>
<execution>
<id>stop-spring-boot</id>
<phase>post-integration-test</phase>
<goals>
<goal>stop</goal>
</goals>
</execution>
</executions>
</plugin>
由于必须配置相当多的 Maven 插件才能使其工作，为了避免任何混淆，这里是完整的pom.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>jacoco-spring-boot-maven</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>jacoco-spring-boot-maven</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<jvmArguments>${argLine}</jvmArguments>
</configuration>
<executions>
<execution>
<id>start-spring-boot</id>
<phase>pre-integration-test</phase>
<goals>
<goal>start</goal>
</goals>
</execution>
<execution>
<id>stop-spring-boot</id>
<phase>post-integration-test</phase>
<goals>
<goal>stop</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>3.0.0-M4</version>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.5</version>
<executions>
<execution>
<id>default-prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>default-report</id>
<phase>verify</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
有了这个，一旦你执行mvn clean verify您可以在以下位置找到 Jacoco 报告：target/site/jacoco/index.html.
您可以在以下位置找到完整的示例项目jacoco-spring-boot-maven-插件-样本 https://github.com/maciejwalkowiak/jacoco-spring-boot-maven-plugin-sample.git
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