在maven构建的项目中启用断言

Question

I have a java program that is built using Maven and I need to enable the assert keyword. Ideally, I'd want to enable assertions in the maven build command.

Answer 1

Maven compiles and builds the java code. Assertion errors come when you are actually running java code so with maven you can't do it this way

unless you are using maven plugin to launch java code, you would have to supply -ea to jvm

exec:java

Pass -ea to commandline argument

Surefire

if you meant for test execution then configure sure-fire plugin to pass -ea to jvm

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.16</version>
    <configuration>
        <enableAssertions>true</enableAssertions>
    </configuration>
  </plugin>

Answer 2

对我有用的唯一事情是

export MAVEN_OPTS="-ea"

Answer 3

You cannot build application with assertions enabled since they are enabled at runtime depending on whetevery or not you pass -ea argument to JVM. Here is configuration of maven exec plugin that enables assertions when running a program:

       <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.5.0</version>
            <executions>
                <execution>
                    <goals>
                        <goal>exec</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <executable>java</executable>
                <arguments>
                    <argument>-ea</argument>
                    <argument>-classpath</argument> <classpath />
                    <argument>io.mc.validationdemo.App</argument>
                </arguments>
            </configuration>
        </plugin>