eclipse建立一個java工程
阿新 • • 發佈:2019-02-02
步驟:
1. 建立一個org.eclipse.core.resources.IProject
2. 給該project設定description,也就是生成.project檔案
注意:a、JavaCore.NATURE_ID = "org.eclipse.jdt.core.javanature"表示是個java project
b、在將description置入project時,保證project是存在的並且開啟中。
3. 將org.eclipse.core.resources.IProject轉換為java project
IJavaProject javaProject=JavaCore.create(project);
4. 取得eclipse的jre路徑和當前project的路徑,設定原始碼的存放目錄以及*.class檔案的存放目錄
這塊生成的是.classPath檔案中的內容
5. 將一個字串編譯為java檔案和對應的.class檔案
例子:
package com.wisoft.magicube.codegenerator.popup.actions; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import org.eclipse.core.resources.ICommand; import org.eclipse.core.resources.IFolder; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IProjectDescription; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IWorkspace; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.NullProgressMonitor; import org.eclipse.core.runtime.Path; import org.eclipse.core.runtime.SubProgressMonitor; import org.eclipse.jdt.core.IClasspathEntry; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.IPackageFragment; import org.eclipse.jdt.core.IPackageFragmentRoot; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.ui.PreferenceConstants; import org.eclipse.jface.action.IAction; import org.eclipse.jface.viewers.ISelection; import org.eclipse.ui.IObjectActionDelegate; import org.eclipse.ui.IWorkbenchPart; public class NewJavaProjectAction implements IObjectActionDelegate { public void run(IAction action) { // 獲取工作區 IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); // ///////////////////////////////////建立新專案/////////////////////////// final IProject project = root.getProject("xyz"); // 設定工程的位置 // 為專案指定存放路徑,預設放在當前工作區 IPath projectPath = new Path("g:/myplugIn"); IWorkspace workspace = root.getWorkspace(); final IProjectDescription description = workspace.newProjectDescription(project.getName()); description.setLocation(projectPath); // 設定工程標記,即為java工程 String[] javaNature = description.getNatureIds(); String[] newJavaNature = new String[javaNature.length + 1]; System.arraycopy(javaNature, 0, newJavaNature, 0, javaNature.length); newJavaNature[javaNature.length] = "org.eclipse.jdt.core.javanature"; // 這個標記證明本工程是Java工程 description.setNatureIds(newJavaNature); // ///////////////////////////// try { NullProgressMonitor monitor = new NullProgressMonitor(); project.create(description, monitor); project.open(IResource.BACKGROUND_REFRESH, new SubProgressMonitor(monitor, 1000)); } catch (CoreException e) { e.printStackTrace(); } // 下面程式碼只在新建嚮導的情況下才可用 /* * //建立新專案,WorkspaceModifyOperation位於org.eclipse.ui.ide中 * WorkspaceModifyOperation workspaceModifyOperation = new * WorkspaceModifyOperation() { * * @Override protected void execute(IProgressMonitor monitor) throws * CoreException, InvocationTargetException, InterruptedException { try * { monitor.beginTask("", ); project.create(description, monitor); * * if(monitor.isCanceled()){ throw new OperationCanceledException(); } * * project.open(IResource.BACKGROUND_REFRESH, new * SubProgressMonitor(monitor, )); } catch (Exception e) { * e.printStackTrace(); } finally{ monitor.done(); } } }; * //接下來呼叫IWizard的getContainer().run()方法. */ // 轉化成java工程 IJavaProject javaProject = JavaCore.create(project); // //////////////////////////////////新增JRE庫//////////////////////////// try { // 獲取預設的JRE庫 IClasspathEntry[] jreLibrary = PreferenceConstants.getDefaultJRELibrary(); // 獲取原來的build path IClasspathEntry[] oldClasspathEntries = javaProject.getRawClasspath(); List list = new ArrayList(); list.addAll(Arrays.asList(jreLibrary)); list.addAll(Arrays.asList(oldClasspathEntries)); javaProject.setRawClasspath(list.toArray(new IClasspathEntry[list.size()]), null); } catch (JavaModelException e) { e.printStackTrace(); } // //////////////////////////////////建立輸出路徑///////////////////////////// IFolder binFolder = javaProject.getProject().getFolder("bin"); try { binFolder.create(true, true, null); javaProject.setOutputLocation(binFolder.getFullPath(), null); } catch (CoreException e) { e.printStackTrace(); } // /////////////////////////設定Java生成器/////////////////////// try { IProjectDescription description2 = javaProject.getProject().getDescription(); ICommand command = description2.newCommand(); command.setBuilderName("org.eclipse.jdt.core.javabuilder"); description2.setBuildSpec(new ICommand[] { command }); description2.setNatureIds(new String[] { "org.eclipse.jdt.core.javanature" }); javaProject.getProject().setDescription(description2, null); } catch (CoreException e) { e.printStackTrace(); } // /////////////////////////////建立原始碼資料夾////////////////////////// // ///////////原始檔夾和資料夾相似,只是使用PackageFragmentRoot進行了封裝//////// IFolder srcFolder = javaProject.getProject().getFolder("src"); try { srcFolder.create(true, true, null); // this.createFolder(srcFolder); // 建立SourceLibrary IClasspathEntry srcClasspathEntry = JavaCore.newSourceEntry(srcFolder.getFullPath()); // 得到舊的build path IClasspathEntry[] oldClasspathEntries = javaProject.readRawClasspath(); // 新增新的 List list = new ArrayList(); list.addAll(Arrays.asList(oldClasspathEntries)); list.add(srcClasspathEntry); // 原來存在一個與工程名相同的原始檔夾,必須先刪除 IClasspathEntry temp = JavaCore.newSourceEntry(new Path("/xyz")); if (list.contains(temp)) { list.remove(temp); } System.out.println(list.size()); javaProject.setRawClasspath(list.toArray(new IClasspathEntry[list.size()]), null); } catch (CoreException e) { e.printStackTrace(); } // ///////////////////////////////建立包////////////////////////// // IPackageFragmentRoot packageFragmentRoot = javaProject.getPackageFragmentRoot(javaProject.getResource()); //此處得到的src目錄只讀 try { // 先找指定的原始檔夾所在的IPackageFragmentRoot IPackageFragmentRoot packageFragmentRoot = javaProject.findPackageFragmentRoot(new Path("/xyz/src")); // 根據IPackageFragmentRoot建立IPackageFragment,IPackageFragment就是包了 IPackageFragment packageFragment = packageFragmentRoot.createPackageFragment("com.aptech.plugin", true, null); // //////////////////////////////////建立Java檔案//////////////////////// String javaCode = "package com.aptech.plugin;public class HelloWorld{public static void main(String[] args){System.out.println(\"中華人民共和國\");}}"; packageFragment.createCompilationUnit("HelloWorld.java", javaCode, true, new NullProgressMonitor()); } catch (JavaModelException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } public void setActivePart(IAction action, IWorkbenchPart targetPart) { } public void selectionChanged(IAction action, ISelection selection) { } }