使用 ant 编译 Spring-Boot 应用程序时出错

Question

I am trying to compile a Spring Boot + Batch project with AntLib since in CI Jenkins it is configured this way.

When compiling the project, an error is generated "/ext-lib/spring-boot-antlib-2.4.0.jar./org/springframework /boot/ant/antlib:xml:27. java.lang:NoClassDefFoundError: org / springframework / util / StringUtils "

The build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="gprd-logs-cleaner" default="main" basedir="."
    xmlns:au="antlib:org.apache.ant.antunit" 
    xmlns:spring-boot="antlib:org.springframework.boot.ant" 
    xmlns:ivy="antlib:org.apache.ivy.ant">

    <property name="src.dir" location="src/main/java" />
    <property name="resource.dir" location="src/main/resources" />
    <property name="target.dir" location="target" />
    <property name="classes.dir" location="${target.dir}/classes" />
    <property name="lib.dir" value="lib" />
    <property name="main-class" value="com.gprd.logs.cleaner.CCCLogsCleanerApp" />

    <taskdef resource="org/apache/ivy/ant/antlib.xml"
            uri="antlib:org.apache.ivy.ant" classpath="${ivy.class.path}"/>
    <taskdef resource="org/apache/ant/antunit/antlib.xml"
            uri="antlib:org.apache.ant.antunit" classpath="${antunit.class.path}"/>

    <path id="classpath">
        <fileset dir="${basedir}/">
            <include name="${lib.dir}/*.jar" />
        </fileset>
    </path>

    <target name="setUp">
        <mkdir dir="${classes.dir}" />
        <javac srcdir="${src.dir}" includeantruntime="false" destdir="${classes.dir}" classpathref="classpath"/>
    </target>

    <target name="compile" depends="setUp">
        <local name="jar" />
        <property name="jar" location="${target.dir}/gprd-logs-cleaner.jar" />
        <spring-boot:exejar destfile="${jar}" classes="${classes.dir}">
            <resources>
                <fileset dir="${resource.dir}" />
            </resources>
            <lib>
                <path refid="classpath" />
            </lib>
        </spring-boot:exejar>
    </target>
    
    <target name="clean">
        <delete dir="${target.dir}" />
    </target>
    
    <!-- Default, run this -->
    <target name="main" depends="clean, compile" />
    
</project>

Spring Boot version: 2.3.4.RELEASE .

I tested with SpringBootAndlib version: spring-boot-antlib-2.4.4.jar or spring-boot-antlib-2.4.0.jar , the error is the same.

Library list:

spring-boot-starter-2.3.4.RELEASE.jar               istack-commons-runtime-3.0.11.jar
spring-boot-2.3.4.RELEASE.jar                       jakarta.activation-1.2.2.jar
spring-boot-autoconfigure-2.3.4.RELEASE.jar         spring-data-jpa-2.3.4.RELEASE.jar
spring-boot-starter-logging-2.3.4.RELEASE.jar       spring-data-commons-2.3.4.RELEASE.jar
logback-classic-1.2.3.jar                           spring-orm-5.2.9.RELEASE.jar
logback-core-1.2.3.jar                              slf4j-api-1.7.28.jar
log4j-to-slf4j-2.13.3.jar                           spring-aspects-5.2.9.RELEASE.jar
log4j-api-2.13.3.jar                                hibernate-entitymanager-5.4.5.Final.jar
jul-to-slf4j-1.7.28.jar                             jboss-logging-3.4.1.Final.jar
jakarta.annotation-api-1.3.5.jar                    dom4j-2.1.1.jar
spring-core-5.2.9.RELEASE.jar                       hibernate-commons-annotations-5.1.0.Final.jar
spring-jcl-5.2.9.RELEASE.jar                        javax.persistence-api-2.2.jar
snakeyaml-1.26.jar                                  byte-buddy-1.10.14.jar
spring-boot-starter-data-jpa-2.3.4.RELEASE.jar      jboss-transaction-api_1.2_spec-1.1.1.Final.jar
spring-boot-starter-aop-2.3.4.RELEASE.jar           spring-batch-core-4.2.4.RELEASE.jar
aspectjweaver-1.9.6.jar                             jackson-databind-2.11.2.jar
spring-boot-starter-jdbc-2.3.4.RELEASE.jar          jackson-annotations-2.11.2.jar
HikariCP-3.4.5.jar                                  jackson-core-2.11.2.jar
jakarta.transaction-api-1.3.3.jar                   micrometer-core-1.5.5.jar
jakarta.persistence-api-2.2.3.jar                   HdrHistogram-2.1.12.jar
hibernate-core-5.4.5.Final.jar                      LatencyUtils-2.0.3.jar
javassist-3.24.0-GA.jar                             javax.batch-api-1.0.jar
antlr-2.7.7.jar                                     jettison-1.2.jar
jandex-2.0.5.Final.jar                              spring-batch-infrastructure-4.2.4.RELEASE.jar
classmate-1.5.1.jar                                 spring-retry-1.2.5.RELEASE.jar
jaxb-runtime-2.3.3.jar                              spring-aop-5.2.9.RELEASE.jar
txw2-2.3.3.jar                                      spring-beans-5.2.9.RELEASE.jar
spring-context-5.2.9.RELEASE.jar                    spring-expression-5.2.9.RELEASE.jar
spring-tx-5.2.9.RELEASE.jar                         spring-jdbc-5.2.9.RELEASE.jar
jakarta.xml.bind-api-2.3.3.jar                      jakarta.activation-api-1.2.2.jar
jasypt-spring-boot-starter-2.0.0.jar                jasypt-spring-boot-2.0.0.jar
jasypt-1.9.2.jar

NOTE: We cannot connect to download dependencies. Thanks in advance

Answer 1

java.lang.NoClassDefFoundError: org / springframework / util / StringUtils "

This error means the class org.springframework.util.StringUtils is not found. This class is located in the spring-core module.

You have spring-core-5.2.9.RELEASE.jar in the list you shared, but it does not seem to be in your classpath. You need to make sure that this jar is in your classpath.

Answer 2

Ok, I have solved the problem. It already compiles completely, but there are some adjustments to be made. First you have to indicate where the libraries are by running the command with ant -debug -lib./ext-lib/ -lib. /lib/ ant -debug -lib./ext-lib/ -lib. /lib/ . I have extracted from the spring-boot-antlib jar part of the xml and adjusted to my needs. Here I leave you in case it is useful to someone.

build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="gprd-logs-cleaner" default="main" basedir=".">

    <property name="src.dir" location="src/main/java" />
    <property name="resource.dir" location="src/main/resources" />
    <property name="target.dir" location="target" />
    <property name="classes.dir" location="${target.dir}/classes" />
    <property name="lib.dir" value="lib" />
    <property name="main-class" value="com.cleaner.App" />
    <property name="spring-boot.version" value="2.3.4.RELEASE" />
    
    <target name="init">
        <mkdir dir="${build.dir}" />
    </target>

    <path id="classpath">
        <fileset dir="${basedir}/">
            <include name="${lib.dir}/*.jar" />
        </fileset>
    </path>

    <!-- Need classpath to run this -->
    <target name="compile" depends="init" description="compile the source ">
        <javac includeantruntime="false" srcdir="${src.dir}"
               destdir="${build.dir}" classpathref="classpath" />
    </target>
    
    <macrodef name="check-exejar" description="Create a spring-boot executable jar">
        <attribute name="destfile" />
        <attribute name="classes" />
        <attribute name="start-class" default="" />
        <attribute name="spring-boot-loader"/>

        <element name="resources" optional="true"
            description="includes resource collections specifying additional Java resources" />

        <element name="lib" optional="true"
            description="includes resource collections containing (jar) dependencies" />

        <sequential>
            <local name="start-class" />

            <echo>Using start class @{start-class}</echo>

            <local name="spring-boot.version" />

            <local name="destdir" />
            <dirname file="@{destfile}" property="destdir" />

            <echo>Using destination directory ${destdir}</echo>
            <mkdir dir="${destdir}/dependency" />

            <echo>Extracting spring-boot-loader to ${destdir}/dependency</echo>
            <local name="spring-boot.loader"/>
            
            <copy todir="${destdir}/dependency">
                <javaresource name="META-INF/loader/spring-boot-loader.jar">
                    <classpath location="@{spring-boot-loader}"/>
                </javaresource>
                <flattenmapper />
            </copy>

            <echo>Embedding spring-boot-loader v2.4.4...</echo>
            <jar destfile="@{destfile}" compress="false">
                <mappedresources>
                    <fileset dir="@{classes}"/>
                    <globmapper from="*" to="BOOT-INF/classes/*" />
                </mappedresources>
                <resources />
                <mappedresources>
                    <lib />
                    <globmapper from="*" to="BOOT-INF/lib/*" />
                </mappedresources>
                <zipfileset src="${destdir}/dependency/spring-boot-loader.jar" />
                <manifest>
                    <attribute name="Main-Class"
                        value="com.cleaner.App" />
                    <attribute name="Start-Class" value="org.springframework.boot.loader.PropertiesLauncher" />
                    <attribute name="Implementation-Title" value="gprd-logs-cleaner"/>
                    <attribute name="Spring-Boot-Classes" value="BOOT-INF/classes/" />
                    <attribute name="Spring-Boot-Lib" value="BOOT-INF/lib/" />
                </manifest>
            </jar>
        </sequential>
    </macrodef>
    
    <target name="build" >
        <local name="jar" />
        <property name="jar" location="${target.dir}/gprd-logs-cleaner.jar" />
        <property name="spring-boot.loader" location="${basedir}/ext-lib/spring-boot-loader-tools-2.4.4.jar" />
        <check-exejar destfile="${jar}" classes="${classes.dir}" spring-boot-loader="${spring-boot.loader}" 
            start-class="com.cleaner.App">
            <resources>
                <fileset dir="${resource.dir}" />
            </resources>
            <lib>
                <path refid="classpath" />
            </lib>
        </check-exejar>
    </target>
    
    <!-- Default, run this -->
    <target name="main" depends="build"/>

</project>

I use PropertiesLuncher because I have to extract the properties from the final jar