我还没有看到执行此操作的任何插件，但是对我来说，这似乎是一个合理的捷径。
以下内容可以构成插件直接从所选接口生成类的基础。它可以在我的box（TM）上使用。
当前假定类将使用带有“ Impl”后缀的接口名称，并且如果该类型已经存在，则失败（记录原因）。
我可以想到的一些增强功能：
- 允许选择多个接口
- 为实现后缀和程序包名称定义首选项页面
- 如果“默认”实现已经存在，则使用填充的值打开对话框
该插件向上下文菜单添加了一个用于编辑器，视图和文本选择的命令，如果选择不能解析为界面，则禁用该项目。也可以使用激活它
ctrl-6（您显然可以更改plugin.xml中的键绑定以适合您的心情）。
插件代码如下：
package name.seller.rich.classwizard.actions;import java.util.Collections;import org.eclipse.core.commands.AbstractHandler;import org.eclipse.core.commands.ExecutionEvent;import org.eclipse.core.commands.ExecutionException;import org.eclipse.core.expressions.evaluationContext;import org.eclipse.core.resources.IFile;import org.eclipse.core.resources.IResource;import org.eclipse.core.runtime.CoreException;import org.eclipse.core.runtime.NullProgressMonitor;import org.eclipse.jdt.core.ICompilationUnit;import org.eclipse.jdt.core.IJavaElement;import org.eclipse.jdt.core.IType;import org.eclipse.jdt.core.JavaModelException;import org.eclipse.jdt.internal.ui.JavaPlugin;import org.eclipse.jdt.internal.ui.actions.SelectionConverter;import org.eclipse.jdt.ui.wizards.NewClassWizardPage;import org.eclipse.jface.viewers.IStructuredSelection;import org.eclipse.swt.widgets.Display;import org.eclipse.ui.IWorkbenchPage;import org.eclipse.ui.IWorkbenchPart;import org.eclipse.ui.IWorkbenchWindow;import org.eclipse.ui.PartInitException;import org.eclipse.ui.handlers.HandlerUtil;import org.eclipse.ui.ide.IDE;import org.eclipse.ui.wizards.newresource.BasicNewResourceWizard;public class GenerateClassHandler extends AbstractHandler { public GenerateClassHandler() { } public Object execute(ExecutionEvent event) throws ExecutionException { NewClassWizardPage page = new NewClassWizardPage(); evaluationContext evaluationContext = (evaluationContext) event .getApplicationContext(); IWorkbenchPart activePart = (IWorkbenchPart) evaluationContext .getVariable("activePart"); try { IStructuredSelection selection = SelectionConverter .getStructuredSelection(activePart); IType type = getFirstType(selection); if (type != null && type.exists() && type.isInterface()) { page.init(selection); String typeName = type.getElementName() + "Impl"; // TODO handle existing type page.setTypeName(typeName, true); // generate constructors and methods, allow modification page.setMethodStubSelection(false, true, true, true); page.setSuperInterfaces(Collections.singletonList(type .getFullyQualifiedName()), true); try { page.createType(new NullProgressMonitor()); IResource resource = page.getModifiedResource(); if (resource != null) { IWorkbenchWindow window = HandlerUtil .getActiveWorkbenchWindowChecked(event); BasicNewResourceWizard .selectAndReveal(resource, window); openResource((IFile) resource, window); } } catch (CoreException e) { // TODO if we get this the type already exists, open a // dialogue to allow the type name to be modified or give // up? logException(e); } } } catch (JavaModelException e) { logException(e); } catch (InterruptedException e) { logException(e); } return null; } protected void openResource(final IFile resource, IWorkbenchWindow window) { final IWorkbenchPage activePage = window.getActivePage(); if (activePage != null) { final Display display = window.getShell().getDisplay(); if (display != null) { display.asyncExec(new Runnable() { public void run() { try { IDE.openEditor(activePage, resource, true); } catch (PartInitException e) { logException(e); } } }); } } } @Override public void setEnabled(Object context) { if (context != null && context instanceof evaluationContext) { evaluationContext evaluationContext = (evaluationContext) context; IWorkbenchPart activePart = (IWorkbenchPart) evaluationContext .getVariable("activePart"); try { IStructuredSelection selection = SelectionConverter .getStructuredSelection(activePart); IType type = getFirstType(selection); if (type != null) { setbaseEnabled(type.isInterface()); return; } } catch (JavaModelException e) { logException(e); } } setbaseEnabled(false); } private IType getFirstType(IStructuredSelection selection) { IJavaElement[] elements = SelectionConverter.getElements(selection); if (elements != null && elements.length > 0) { if (elements[0] != null && elements[0] instanceof IType) { return (IType) elements[0]; } try { if (elements[0] != null && elements[0] instanceof ICompilationUnit) { IType[] types = ((ICompilationUnit) elements[0]) .getAllTypes(); if (types != null && types.length > 0) { return types[0]; } } } catch (JavaModelException e) { logException(e); } } return null; } protected void logException(Exception e) { JavaPlugin.log(e); }}贡献命令的plugin.xml是：
<?xml version="1.0" encoding="UTF-8"?><?eclipse version="3.0"?><plugin> <extension point="org.eclipse.ui.commands"> <command name="Generate Class" categoryId="name.seller.rich.classwizard.category" id="name.seller.rich.classwizard.generateClassCommand"> </command> </extension> <extension point="org.eclipse.ui.handlers"> <handler commandId="name.seller.rich.classwizard.generateClassCommand" > </handler> </extension> <extension point="org.eclipse.ui.bindings"> <key commandId="name.seller.rich.classwizard.generateClassCommand" contextId="org.eclipse.ui.contexts.window" sequence="M1+6" schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"> </key> </extension> <extension point="org.eclipse.ui.menus"> <menuContribution locationURI="popup:org.eclipse.ui.popup.any?after=additions"> <commandcommandId="name.seller.rich.classwizard.generateClassCommand"mnemonic="G"> </command> </menuContribution> </extension></plugin>
manifest.mf如下所示：
Manifest-Version: 1.0Bundle-ManifestVersion: 2Bundle-Name: ClasswizardBundle-SymbolicName: name.seller.rich.classwizard; singleton:=trueBundle-Version: 1.0.0Require-Bundle: org.eclipse.ui, org.eclipse.core.runtime, org.eclipse.jdt.core;bundle-version="3.5.0", org.eclipse.core.expressions;bundle-version="3.4.100", org.eclipse.jface.text;bundle-version="3.5.0", org.eclipse.jdt.ui;bundle-version="3.5.0", org.eclipse.ui.ide;bundle-version="3.5.0", org.eclipse.ui.editors;bundle-version="3.5.0", org.eclipse.core.resources;bundle-version="3.5.0"Eclipse-AutoStart: trueBundle-RequiredExecutionEnvironment: JavaSE-1.6
