一步一步将PlantUML类图导出为自定义格式的XMI文件

本文主要是介绍一步一步将PlantUML类图导出为自定义格式的XMI文件，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

一步一步将PlantUML类图导出为自定义格式的XMI文件

说明：

• 首次发表日期：2024-09-08
• PlantUML官网： https://plantuml.com/zh/
• PlantUML命令行文档： https://plantuml.com/zh/command-line#6a26f548831e6a8c
• PlantUML XMI文档: https://plantuml.com/zh/xmi
• 进一步用处：根据导出的XMI文件生成代码

PlantUML（Java）中获取类图以及plantuml xmi代码是如何遍历实体并获取属性的

以下是来自 https://stackoverflow.com/questions/76599075/parse-uml-class-diagram-with-plantuml-java-api 的代码：

String source = "@startuml\n" +PUT YOUR CLASS DIAGRAM HERE"@enduml";SourceStringReader r = new SourceStringReader(source);
FileOutputStream file = new FileOutputStream("testGroovy2.png");
ClassDiagram cd = (ClassDiagram) r.getBlocks().get(0).getDiagram();
Collection<Quark<Entity>> classes = 
cd.getEntityFactory().root().getChildren();
classes.stream().forEach(c-> System.out.println(c));

从中知道如何获取ClassDiagram

查看 net.sourceforge.plantuml.xmi.XmiClassDiagramAbstract 中XmiClassDiagramStandard的定义：

public class XmiClassDiagramStandard extends XmiClassDiagramAbstract implements XmlDiagramTransformer {public XmiClassDiagramStandard(ClassDiagram classDiagram) throws ParserConfigurationException {super(classDiagram);Iterator var2 = classDiagram.getEntityFactory().leafs().iterator();while(var2.hasNext()) {Entity ent = (Entity)var2.next();Element cla = this.createEntityNode(ent);if (cla != null) {this.ownedElementRoot.appendChild(cla);this.done.add(ent);}}}
}

从中知道如何遍历entity

查看 net.sourceforge.plantuml.xmi.XmiClassDiagramStandard 中的createEntityNode方法：

    protected final Element createEntityNode(Entity entity) {Element cla = this.document.createElement("UML:Class");if (entity.getLeafType() == LeafType.NOTE) {return null;} else {cla.setAttribute("xmi.id", entity.getUid());cla.setAttribute("name", entity.getDisplay().get(0).toString());Stereotype stereotype = entity.getStereotype();if (stereotype != null) {Element stereo = this.document.createElement("UML:ModelElement.stereotype");Iterator var5 = stereotype.getMultipleLabels().iterator();while(var5.hasNext()) {String s = (String)var5.next();Element name = this.document.createElement("UML:Stereotype");name.setAttribute("name", s);stereo.appendChild(name);}cla.appendChild(stereo);}LeafType type = entity.getLeafType();if (type == LeafType.ABSTRACT_CLASS) {cla.setAttribute("isAbstract", "true");} else if (type == LeafType.INTERFACE) {cla.setAttribute("isInterface", "true");}if (entity.isStatic()) {cla.setAttribute("isStatic", "true");}if (entity.getVisibilityModifier() == VisibilityModifier.PRIVATE_FIELD || entity.getVisibilityModifier() == VisibilityModifier.PRIVATE_METHOD) {cla.setAttribute("visibility", entity.getVisibilityModifier().getXmiVisibility());}Element feature = this.document.createElement("UML:Classifier.feature");cla.appendChild(feature);Member m;Element operation;VisibilityModifier visibility;ListIterator var13;CharSequence cs;for(var13 = entity.getBodier().getFieldsToDisplay().iterator(); var13.hasNext(); feature.appendChild(operation)) {cs = (CharSequence)var13.next();m = (Member)cs;operation = this.document.createElement("UML:Attribute");operation.setAttribute("xmi.id", "att" + this.classDiagram.getUniqueSequence());operation.setAttribute("name", m.getDisplay(false));visibility = m.getVisibilityModifier();if (visibility != null) {operation.setAttribute("visibility", visibility.getXmiVisibility());}if (m.isStatic()) {operation.setAttribute("isStatic", "true");}}for(var13 = entity.getBodier().getMethodsToDisplay().iterator(); var13.hasNext(); feature.appendChild(operation)) {cs = (CharSequence)var13.next();m = (Member)cs;operation = this.document.createElement("UML:Operation");operation.setAttribute("xmi.id", "att" + this.classDiagram.getUniqueSequence());operation.setAttribute("name", m.getDisplay(false));visibility = m.getVisibilityModifier();if (visibility != null) {operation.setAttribute("visibility", visibility.getXmiVisibility());}if (m.isStatic()) {operation.setAttribute("isStatic", "true");}}return cla;}}

从中可以看出：

• entity.getBodier().getFieldsToDisplay().iterator() 是获取entity的attribute的迭代器
• entity.getBodier().getMethodsToDisplay().iterator() 是获取entity的operation的迭代器
• name，isAbstract，isInterface 和 isStatic 这些属性是如何获取的

还有 https://github.com/plantuml/plantuml/pull/1298/files 是2023年2月的一个PR（写本文时尚未Merge），可以作为参考（有待阅读）。

使用JAVA代码将PlantUML类图导出为XMI

通过调用exportDiagram方法

import net.sourceforge.plantuml.FileFormat;  
import net.sourceforge.plantuml.FileFormatOption;  
import net.sourceforge.plantuml.SourceStringReader;import java.io.FileOutputStream;public class Main {  public static void main(String[] args) throws IOException {OutputStream output = new FileOutputStream("test.xmi");FileFormatOption fileFormatOption = new FileFormatOption(FileFormat.XMI_ARGO);String content = new String(Files.readAllBytes(Paths.get("a.puml")));SourceStringReader reader = new SourceStringReader(content);reader.getBlocks().get(0).getDiagram().exportDiagram(output, 0, fileFormatOption);}
}

其中FileFormat是一个枚举，定义了XMI_STANDARD，XMI_STAR和XMI_ARGO等格式

分析getDiagram的调用链

getDiagram方法来自net.sourceforge.plantuml.core.Diagram提供的exportDiagram接口方法，其实现：

    public final ImageData exportDiagram(OutputStream os, int index, FileFormatOption fileFormatOption) throws IOException {long now = System.currentTimeMillis();ImageData var6;try {var6 = this.exportDiagramNow(os, index, fileFormatOption);} finally {if (OptionFlags.getInstance().isEnableStats()) {StatsUtilsIncrement.onceMoreGenerate(System.currentTimeMillis() - now, this.getClass(), fileFormatOption.getFileFormat());}}return var6;}

其中主要是调用了net.sourceforge.plantuml.AbstractPSystem中的exportDiagramNow接口方法。而其在net.sourceforge.plantuml.UmlDiagram中的实现如下：

    protected final ImageData exportDiagramNow(OutputStream os, int index, FileFormatOption fileFormatOption) throws IOException {fileFormatOption = fileFormatOption.withTikzFontDistortion(this.getSkinParam().getTikzFontDistortion());if (fileFormatOption.getFileFormat() == FileFormat.PDF) {return this.exportDiagramInternalPdf(os, index);} else {try {ImageData imageData = this.exportDiagramInternal(os, index, fileFormatOption);this.lastInfo = new XDimension2D((double)imageData.getWidth(), (double)imageData.getHeight());return imageData;} catch (NoStyleAvailableException var5) {this.exportDiagramError(os, var5, fileFormatOption, (String)null);return ImageDataSimple.error(var5);} catch (UnparsableGraphvizException var6) {Logme.error(var6);this.exportDiagramError(os, var6.getCause(), fileFormatOption, var6.getGraphvizVersion());return ImageDataSimple.error(var6);} catch (Throwable var7) {this.exportDiagramError(os, var7, fileFormatOption, (String)null);return ImageDataSimple.error(var7);}}}

可以看出其主要是调用了net.sourceforge.plantuml.UmlDiagram.exportDiagramInternal接口方法，由于当前的类是ClassDiagram，其将调用net.sourceforge.plantuml.classdiagram.ClassDiagram实现的exportDiagramInternal方法：

    protected final ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption) throws IOException {return this.useLayoutExplicit != 0 ? this.exportLayoutExplicit(os, index, fileFormatOption) : super.exportDiagramInternal(os, index, fileFormatOption);}

其中net.sourceforge.plantuml.classdiagram.ClassDiagram继承net.sourceforge.plantuml.objectdiagram.AbstractClassOrObjectDiagram继承net.sourceforge.plantuml.classdiagram.AbstractEntityDiagram继承net.atmp.CucaDiagram

而net.atmp.CucaDiagram.exportDiagramInternal方法中涉及XMI的部分如下：

                this.createFilesXmi(os, fileFormat);return ImageDataSimple.ok();

其调用了net.atmp.CucaDiagram.createFilesXmi方法，其定义如下：

    private void createFilesXmi(OutputStream suggestedFile, FileFormat fileFormat) throws IOException {CucaDiagramXmiMaker maker = new CucaDiagramXmiMaker(this, fileFormat);maker.createFiles(suggestedFile);}

其中调用了net.sourceforge.plantuml.xmi.CucaDiagramXmiMaker的createFiles方法，其定义如下：

    public void createFiles(OutputStream fos) throws IOException {try {Object xmi;if (this.diagram instanceof StateDiagram) {xmi = new XmiStateDiagram((StateDiagram)this.diagram);} else if (this.diagram instanceof DescriptionDiagram) {xmi = this.createDescriptionDiagram();} else {if (!(this.diagram instanceof ClassDiagram)) {throw new UnsupportedOperationException("Diagram type " + this.diagram.getUmlDiagramType() + " is not supported in XMI");}xmi = this.createClassDiagram();}((XmlDiagramTransformer)xmi).transformerXml(fos);} catch (ParserConfigurationException var3) {Log.error(var3.toString());Logme.error(var3);throw new IOException(var3.toString());} catch (TransformerException var4) {Log.error(var4.toString());Logme.error(var4);throw new IOException(var4.toString());}}

可以看出涉及创建xmi文件的关键2行为：

xmi = this.createClassDiagram();
((XmlDiagramTransformer)xmi).transformerXml(fos);

而createClassDiagram的定义如下：

    private XmlDiagramTransformer createClassDiagram() throws ParserConfigurationException {if (this.fileFormat == FileFormat.XMI_STANDARD) {return new XmiClassDiagramStandard((ClassDiagram)this.diagram);} else if (this.fileFormat == FileFormat.XMI_ARGO) {return new XmiClassDiagramArgo((ClassDiagram)this.diagram);} else if (this.fileFormat == FileFormat.XMI_SCRIPT) {return new XmiClassDiagramScript((ClassDiagram)this.diagram);} else if (this.fileFormat == FileFormat.XMI_STAR) {return new XmiClassDiagramStar((ClassDiagram)this.diagram);} else {throw new UnsupportedOperationException();}}

分析getDiagram方法后，调用内部API导出XMI

import net.sourceforge.plantuml.FileFormat;  
import net.sourceforge.plantuml.FileFormatOption;  
import net.sourceforge.plantuml.SourceStringReader;
import net.sourceforge.plantuml.xmi.XmiClassDiagramArgo;import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;import java.io.FileOutputStream;public class Main {  public static void main(String[] args) throws IOException, ParserConfigurationException, TransformerException {OutputStream fos = new FileOutputStream("test2.xmi");FileFormatOption fileFormatOption = new FileFormatOption(FileFormat.XMI_ARGO);String content = new String(Files.readAllBytes(Paths.get("a.puml")));SourceStringReader reader = new SourceStringReader(content);ClassDiagram classDiagram = (ClassDiagram) reader.getBlocks().get(0).getDiagram();Object xmi = new XmiClassDiagramArgo(classDiagram);((XmlDiagramTransformer)xmi).transformerXml(fos);}
}

读取一个uml文件并打印其中的属性信息

现在了解了一些后，使用以下Java代码来查看UML文件的信息

package org.example;import net.sourceforge.plantuml.SourceStringReader;
import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.abel.LeafType;
import net.sourceforge.plantuml.abel.Link;
import net.sourceforge.plantuml.classdiagram.ClassDiagram;
import net.sourceforge.plantuml.cucadiagram.Member;
import net.sourceforge.plantuml.skin.VisibilityModifier;import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Iterator;import java.util.ListIterator;public class Main {public static void main(String[] args) throws IOException, ParserConfigurationException, TransformerException {OutputStream output = new FileOutputStream("test.xmi");
//        String source = "@startuml\n";
//        source += "Bob -> Alice : hello\n";
//        source += "@enduml\n";String content = new String(Files.readAllBytes(Paths.get("a.puml")));SourceStringReader reader = new SourceStringReader(content);ClassDiagram classDiagram = (ClassDiagram) reader.getBlocks().get(0).getDiagram();String titleName = classDiagram.getTitleDisplay().get(0).toString();System.out.println("title: " + titleName);Iterator var2 = classDiagram.getEntityFactory().leafs().iterator();while(var2.hasNext()) {Entity entity = (Entity)var2.next();System.out.println("----------------------------------");System.out.println("uid: " + entity.getUid());if (entity.getLeafType() == LeafType.NOTE) {
//                entity.isAloneAndUnlinked();
//                System.out.println("Entity type: " + entity.getLeafType());} else {Iterator var1 = classDiagram.getLinks().iterator();while(var1.hasNext()) {Link link = (Link)var1.next();if (link.contains(entity)) {Entity other = link.getOther(entity);if (other.getLeafType() == LeafType.NOTE) {System.out.println("Note: "  + other.getDisplay().get(0).toString());}}}System.out.println("Entity type: " + entity.getLeafType());String entityName = entity.getDisplay().get(0).toString();System.out.println("Entity name: " + entityName);System.out.println("Package: " + entity.getQuark().getParent().toString());LeafType type = entity.getLeafType();if (type == LeafType.ABSTRACT_CLASS) {System.out.println("isAbstract");} else if (type == LeafType.INTERFACE) {System.out.println("isInterface");}if (entity.isStatic()) {System.out.println(("isStatic"));}if (entity.getVisibilityModifier() == VisibilityModifier.PRIVATE_FIELD || entity.getVisibilityModifier() == VisibilityModifier.PRIVATE_METHOD) {System.out.println("visibility: " + entity.getVisibilityModifier().getXmiVisibility());}Member m;VisibilityModifier visibility;ListIterator var13;CharSequence cs;for (var13 = entity.getBodier().getFieldsToDisplay().iterator(); var13.hasNext();) {cs = (CharSequence)var13.next();m = (Member) cs;System.out.println("field name: " + m.getDisplay(false));visibility = m.getVisibilityModifier();if (visibility != null) {System.out.println("visibility: " + visibility.getXmiVisibility());}if (m.isStatic()) {System.out.println("isStatic");}}for (var13 = entity.getBodier().getMethodsToDisplay().iterator(); var13.hasNext();) {cs = (CharSequence)var13.next();m = (Member) cs;System.out.println("operation name: " + m.getDisplay(false));visibility = m.getVisibilityModifier();if (visibility != null) {System.out.println("visibility: " + visibility.getXmiVisibility());}if (m.isStatic()) {System.out.println("isStatic");}}}}// Write the first image to "png"
//        String desc = reader.outputImage(output).getDescription();
// Return a null string if no generation}
}

创建JAVA项目并打包为JAR包：将PlantUML导出为自定义格式的XMI文件

创建项目

使用IDEA创建一个maven项目，然后打开plantuml的maven仓库页面： https://mvnrepository.com/artifact/net.sourceforge.plantuml/plantuml/1.2024.6 将dependency标签拷贝到pom.xml中

添加用于自定义XMI格式的类

由于不能引用XmiClassDiagramAbstract（提示 is not public in ‘net.sourceforge.plantuml.xmi’. Cannot be accessed from outside package），所以在src/main/java下新建package net.sourceforge.plantuml.xmi

然后添加类XmiClassDiagramCustom（extends XmiClassDiagramAbstract）：

package net.sourceforge.plantuml.xmi;import java.util.Iterator;
import java.util.ListIterator;
import javax.xml.parsers.ParserConfigurationException;import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.abel.LeafType;
import net.sourceforge.plantuml.abel.Link;
import net.sourceforge.plantuml.classdiagram.ClassDiagram;
import net.sourceforge.plantuml.cucadiagram.Member;
import net.sourceforge.plantuml.decoration.LinkDecor;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.skin.VisibilityModifier;
import net.sourceforge.plantuml.stereo.Stereotype;
import org.w3c.dom.Element;public class XmiClassDiagramCustom extends XmiClassDiagramAbstract implements XmlDiagramTransformer {public XmiClassDiagramCustom(ClassDiagram classDiagram) throws ParserConfigurationException {super(classDiagram);Iterator var2 = classDiagram.getEntityFactory().leafs().iterator();Element titleElement = this.document.createElement("UML:Title");titleElement.setAttribute("name", classDiagram.getTitleDisplay().get(0).toString());this.ownedElementRoot.appendChild(titleElement);while(var2.hasNext()) {Entity ent = (Entity)var2.next();Element cla = this.createEntityNodeCustom(ent, classDiagram);if (cla != null) {this.ownedElementRoot.appendChild(cla);this.done.add(ent);}}var2 = classDiagram.getLinks().iterator();while(var2.hasNext()) {Link link = (Link)var2.next();this.addLink(link);}}protected final Element createEntityNodeCustom(Entity entity, ClassDiagram classDiagram) {Element cla = this.document.createElement("UML:Class");if (entity.getLeafType() == LeafType.NOTE) {return null;} else {cla.setAttribute("xmi.id", entity.getUid());cla.setAttribute("name", entity.getDisplay().get(0).toString());// Get Note:Iterator var1 = classDiagram.getLinks().iterator();while(var1.hasNext()) {Link link = (Link)var1.next();if (link.contains(entity)) {Entity other = link.getOther(entity);if (other.getLeafType() == LeafType.NOTE) {cla.setAttribute("note", other.getDisplay().get(0).toString());
//                        System.out.println("Note: "  + other.getDisplay().get(0).toString());}}}cla.setAttribute("package", entity.getQuark().getParent().toString());Stereotype stereotype = entity.getStereotype();if (stereotype != null) {Element stereo = this.document.createElement("UML:ModelElement.stereotype");Iterator var5 = stereotype.getMultipleLabels().iterator();while(var5.hasNext()) {String s = (String)var5.next();Element name = this.document.createElement("UML:Stereotype");name.setAttribute("name", s);stereo.appendChild(name);}cla.appendChild(stereo);}LeafType type = entity.getLeafType();if (type == LeafType.ABSTRACT_CLASS) {cla.setAttribute("isAbstract", "true");} else if (type == LeafType.INTERFACE) {cla.setAttribute("isInterface", "true");}if (entity.isStatic()) {cla.setAttribute("isStatic", "true");}if (entity.getVisibilityModifier() == VisibilityModifier.PRIVATE_FIELD || entity.getVisibilityModifier() == VisibilityModifier.PRIVATE_METHOD) {cla.setAttribute("visibility", entity.getVisibilityModifier().getXmiVisibility());}Element feature = this.document.createElement("UML:Classifier.feature");cla.appendChild(feature);Member m;Element operation;VisibilityModifier visibility;ListIterator var13;CharSequence cs;for(var13 = entity.getBodier().getFieldsToDisplay().iterator(); var13.hasNext(); feature.appendChild(operation)) {cs = (CharSequence)var13.next();m = (Member)cs;operation = this.document.createElement("UML:Attribute");operation.setAttribute("xmi.id", "att" + this.classDiagram.getUniqueSequence());operation.setAttribute("name", m.getDisplay(false));visibility = m.getVisibilityModifier();if (visibility != null) {operation.setAttribute("visibility", visibility.getXmiVisibility());}if (m.isStatic()) {operation.setAttribute("isStatic", "true");}}for(var13 = entity.getBodier().getMethodsToDisplay().iterator(); var13.hasNext(); feature.appendChild(operation)) {cs = (CharSequence)var13.next();m = (Member)cs;operation = this.document.createElement("UML:Operation");operation.setAttribute("xmi.id", "att" + this.classDiagram.getUniqueSequence());operation.setAttribute("name", m.getDisplay(false));visibility = m.getVisibilityModifier();if (visibility != null) {operation.setAttribute("visibility", visibility.getXmiVisibility());}if (m.isStatic()) {operation.setAttribute("isStatic", "true");}}return cla;}}// copy from XmiClassDiagramStarprivate void addLink(Link link) {if (!link.isHidden() && !link.isInvis()) {String assId = "ass" + this.classDiagram.getUniqueSequence();if (link.getType().getDecor1() != LinkDecor.EXTENDS && link.getType().getDecor2() != LinkDecor.EXTENDS) {Element association = this.document.createElement("UML:Association");association.setAttribute("xmi.id", assId);association.setAttribute("namespace", CucaDiagramXmiMaker.getModel(this.classDiagram));if (!Display.isNull(link.getLabel())) {association.setAttribute("name", this.forXMI(link.getLabel()));}Element connection = this.document.createElement("UML:Association.connection");Element end1 = this.document.createElement("UML:AssociationEnd");end1.setAttribute("xmi.id", "end" + this.classDiagram.getUniqueSequence());end1.setAttribute("association", assId);end1.setAttribute("type", link.getEntity1().getUid());if (link.getQuantifier1() != null) {end1.setAttribute("name", this.forXMI(link.getQuantifier1()));}Element endparticipant1 = this.document.createElement("UML:AssociationEnd.participant");if (link.getType().getDecor2() == LinkDecor.COMPOSITION) {end1.setAttribute("aggregation", "composite");}if (link.getType().getDecor2() == LinkDecor.AGREGATION) {end1.setAttribute("aggregation", "aggregate");}end1.appendChild(endparticipant1);connection.appendChild(end1);Element end2 = this.document.createElement("UML:AssociationEnd");end2.setAttribute("xmi.id", "end" + this.classDiagram.getUniqueSequence());end2.setAttribute("association", assId);end2.setAttribute("type", link.getEntity2().getUid());if (link.getQuantifier2() != null) {end2.setAttribute("name", this.forXMI(link.getQuantifier2()));}Element endparticipant2 = this.document.createElement("UML:AssociationEnd.participant");if (link.getType().getDecor1() == LinkDecor.COMPOSITION) {end2.setAttribute("aggregation", "composite");}if (link.getType().getDecor1() == LinkDecor.AGREGATION) {end2.setAttribute("aggregation", "aggregate");}end2.appendChild(endparticipant2);connection.appendChild(end2);association.appendChild(connection);this.ownedElementRoot.appendChild(association);} else {this.addExtension(link, assId);}}}// copy from XmiClassDiagramStarprivate void addExtension(Link link, String assId) {Element association = this.document.createElement("UML:Generalization");association.setAttribute("xmi.id", assId);association.setAttribute("namespace", CucaDiagramXmiMaker.getModel(this.classDiagram));if (link.getLabel() != null) {association.setAttribute("name", this.forXMI(link.getLabel()));}if (link.getType().getDecor1() == LinkDecor.EXTENDS) {association.setAttribute("child", link.getEntity1().getUid());association.setAttribute("parent", link.getEntity2().getUid());} else {if (link.getType().getDecor2() != LinkDecor.EXTENDS) {throw new IllegalStateException();}association.setAttribute("child", link.getEntity2().getUid());association.setAttribute("parent", link.getEntity1().getUid());}this.ownedElementRoot.appendChild(association);}
}

添加导出类（入口）

添加package org.export，并添加类UML2XMIExporter：

package org.export;import net.sourceforge.plantuml.SourceStringReader;
import net.sourceforge.plantuml.classdiagram.ClassDiagram;import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;import net.sourceforge.plantuml.xmi.XmiClassDiagramCustom;
import net.sourceforge.plantuml.xmi.XmlDiagramTransformer;public class UML2XMIExporter {public static void main(String[] args) throws IOException, ParserConfigurationException, TransformerException {String content = new String(Files.readAllBytes(Paths.get(args[0])));OutputStream outputCustom = Files.newOutputStream(Paths.get(args[1]));SourceStringReader reader = new SourceStringReader(content);ClassDiagram classDiagram = (ClassDiagram) reader.getBlocks().get(0).getDiagram();// 导出XMIXmlDiagramTransformer xmi = new XmiClassDiagramCustom(classDiagram);xmi.transformerXml(outputCustom);}
}

打包

接下来，参考 https://blog.csdn.net/weixin_41229430/article/details/138963215 打包为jar包

创建文件： src/main/assembly/assembly.xml， 内容如下：

<assembly><id>assembly</id><formats><format>zip</format><format>jar</format><format>tar.gz</format></formats><includeBaseDirectory>false</includeBaseDirectory><fileSets><!--   --><fileSet><directory>src/main/resources</directory><outputDirectory>conf</outputDirectory><includes><include>*.xml</include><include>*.properties</include><include>**/*.xml</include><include>**/*.properties</include></includes><fileMode>0644</fileMode></fileSet><fileSet><directory>assembly/bin</directory><outputDirectory>bin</outputDirectory><fileMode>0755</fileMode></fileSet></fileSets><dependencySets><dependencySet><outputDirectory>lib</outputDirectory></dependencySet></dependencySets>
</assembly>

然后在pom.xml中添加

    <build><plugins><!--主要用于将 Maven 项目打包成可执行的程序或分发包 --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-assembly-plugin</artifactId><version>3.3.0</version><executions><execution><id>make-assembly2</id><!--名字任意 --><phase>package</phase><!-- 绑定到package生命周期阶段上 --><goals><goal>single</goal><!-- 只运行一次 --></goals><configuration><descriptors><descriptor>${basedir}/src/main/assembly/assembly.xml</descriptor></descriptors><archive><manifest><mainClass>org.export.UML2XMIExporter</mainClass><addClasspath>true</addClasspath><classpathPrefix>lib/</classpathPrefix><useUniqueVersions>false</useUniqueVersions></manifest></archive><descriptorRefs><descriptorRef>jar-with-dependencies</descriptorRef></descriptorRefs></configuration></execution></executions></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.8.1</version><configuration><source>1.8</source><target>1.8</target></configuration></plugin></plugins></build>

点击IDEA右侧的m图标（maven），双击Lifecycle下的package。然后在target目录下可以看到已经生成了jar包。

打开command prompt命令行（不要使用powershell）运行：

java -Dfile.encoding=UTF-8 -jar custom-plantuml-xmi-export-1.0-SNAPSHOT-jar-with-dependencies.jar input.puml output.xmi

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