{"id":1036,"date":"2022-08-28T12:32:24","date_gmt":"2022-10-21T17:50:23","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/uncategorized\/executing-java-programs-from-a-maven-build-using-the-exec-maven-plugin\/"},"modified":"2024-03-13T15:49:51","modified_gmt":"2024-03-13T15:49:51","slug":"executing-java-programs-using-the-exec-maven-plugin","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/executing-java-programs-using-the-exec-maven-plugin\/","title":{"rendered":"Executing Java programs using the Exec Maven Plugin"},"content":{"rendered":"

The maven exec plugin permits the execution of system and Java programs directly from the maven command.<\/p>\n

The maven exec plugin has two objectives.<\/p>\n

    \n
  1. \n
      exec:exec – can be utilized to run any application in a distinct process.<\/ol>\n<\/li>\n<\/ol>\n

       <\/p>\n

        exec:java – can be employed to execute a Java program within the same virtual machine.<\/ol>\n

        In this guide, we will discover the process of executing a Java program from our Maven project using exec:java.<\/p>\n

        First, include the necessary configurations for the exec-maven-plugin in the pom.xml<\/a> file.<\/h2>\n

        To utilize a maven plugin, it is necessary to set it up in the build section of the pom.xml. Simply incorporate the plugin configuration provided below into your project’s pom.xml file.<\/p>\n

        <<\/span>plugin<\/span>><\/span><\/span>\r\n\t\t<<\/span>groupId<\/span>><\/span><\/span>org.codehaus.mojo<\/<\/span>groupId<\/span>><\/span><\/span>\r\n\t\t<<\/span>artifactId<\/span>><\/span><\/span>exec-maven-plugin<\/<\/span>artifactId<\/span>><\/span><\/span>\r\n\t\t<<\/span>version<\/span>><\/span><\/span>1.6.0<\/<\/span>version<\/span>><\/span><\/span>\r\n\t\t<<\/span>configuration<\/span>><\/span><\/span>\r\n\t\t\t<<\/span>mainClass<\/span>><\/span><\/span>com.scdev.maven.utils.BuildInfo<\/<\/span>mainClass<\/span>><\/span><\/span>\r\n\t\t<\/<\/span>configuration<\/span>><\/span><\/span>\r\n<\/<\/span>plugin<\/span>><\/span><\/span>\r\n<\/code><\/pre>\n
        The main focus should be on the “mainClass” element within the “configuration”. This is where we indicate the Java class that will be executed through the exec:java goal.<\/p>\n
        This is the Java class content. It is a basic class that displays the Java version details and the current time.<\/p>\n
        package<\/span> com.<\/span>scdev.<\/span>maven.<\/span>utils<\/span>;<\/span>\r\n\r\nimport<\/span> java.<\/span>time.<\/span><\/span>LocalDateTime<\/span><\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> BuildInfo<\/span> {<\/span>\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>\r\n\t\tString<\/span> javaVersion =<\/span> Runtime<\/span>.<\/span>version<\/span>(<\/span>)<\/span>.<\/span>toString<\/span>(<\/span>)<\/span>;<\/span>\r\n\t\tString<\/span> time =<\/span> LocalDateTime<\/span>.<\/span>now<\/span>(<\/span>)<\/span>.<\/span>toString<\/span>(<\/span>)<\/span>;<\/span>\r\n\t\tSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"********\\nBuild Time: \"<\/span> +<\/span> time \r\n\t\t\t\t+<\/span> \"\\nJava Version: \"<\/span> +<\/span> javaVersion +<\/span> \"\\n********\"<\/span>)<\/span>;<\/span>\r\n\t}<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
        Step 2: Execute the Maven build by using the goal exec:java.<\/h2>\n
        This is the result obtained when the Maven build is executed with the exec:java objective.<\/p>\n
        $ mvn exec:java\r\n[<\/span>INFO]<\/span> Scanning for<\/span> projects..<\/span>.\r\n[<\/span>INFO]<\/span> \r\n[<\/span>INFO]<\/span> ---------------<<\/span> com.scdev.maven:maven-example-jar ><\/span>---------------\r\n[<\/span>INFO]<\/span> Building maven-example-jar 0.0<\/span>.1-SNAPSHOT\r\n[<\/span>INFO]<\/span> --------------------------------[<\/span> jar ]<\/span>---------------------------------\r\n[<\/span>INFO]<\/span> \r\n[<\/span>INFO]<\/span> --- exec-maven-plugin:1.6.0:java (<\/span>default-cli)<\/span> @ maven-example-jar ---\r\n********\r\nBuild Time: 2020<\/span>-01-10T12:44:17.718061\r\nJava Version: 13.0<\/span>.1+9\r\n********\r\n[<\/span>INFO]<\/span> ------------------------------------------------------------------------\r\n[<\/span>INFO]<\/span> BUILD SUCCESS\r\n[<\/span>INFO]<\/span> ------------------------------------------------------------------------\r\n[<\/span>INFO]<\/span> Total time:  0.591<\/span> s\r\n[<\/span>INFO]<\/span> Finished at: 2020<\/span>-01-10T12:44:17+05:30\r\n[<\/span>INFO]<\/span> ------------------------------------------------------------------------\r\n$\r\n<\/code><\/pre>\n
        \"Exec<\/div>\n
        Citations:
        \n– Sources:
        \n– Bibliography:<\/h2>\n