jacoco 多个 module 运行 code coverage 测试

别不相信，就这么简单，如果运行不成功，那就是加入插件的parent pom.xml有可能是maven repsitry中的文件。
在parent pom.xml 中的<build>中加入如下的插件：

<plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-surefire-plugin</artifactId>                <version>2.19.1</version>                <configuration>                    <skipTests>false</skipTests>                </configuration>            </plugin><plugin><!-- For integration test separation --><groupId>org.apache.maven.plugins</groupId><artifactId>maven-failsafe-plugin</artifactId><version>2.19.1</version><dependencies>    <dependency>                     <groupId>org.apache.maven.surefire</groupId>                        <artifactId>surefire-junit47</artifactId>                        <version>2.19.1</version>                    </dependency>                </dependencies>                <configuration>                    <forkCount>4</forkCount>                    <reuseForks>false</reuseForks>                    <skip>true</skip>                </configuration>                <executions>                    <execution>                        <id>integration-test</id>                        <goals>                            <goal>integration-test</goal>                        </goals>                    </execution>                    <execution>                        <id>verify</id>                        <goals>                            <goal>verify</goal>                        </goals>                    </execution>                </executions>            </plugin>            <plugin>                <groupId>org.jacoco</groupId>                <artifactId>jacoco-maven-plugin</artifactId>                <version>0.7.9</version>                <configuration>                    <destFile>target/coverage-reports/jacoco-unit.exec</destFile>                    <dataFile>target/coverage-reports/jacoco-unit.exec</dataFile>                </configuration>                <executions>                    <execution>                        <id>jacoco-initialize</id>                        <goals>                            <goal>prepare-agent</goal>                        </goals>                    </execution>                    <execution>                        <id>jacoco-site</id>                        <phase>test</phase>                        <goals>                            <goal>report</goal>                        </goals>                    </execution>                </executions>            </plugin>

maven-surefire-plugin中的skiptest设置为false,用来运行单元测试。
jacoco中的Execution用来对应maven的goal,可以是test,verify。还有集成测试的选项。
运行 mvn clean test -Dmaven.test.failure.ignore=true
生成的report 在 target /site/jacoco下，导航到文件下，去查看index.html就是了。