在上一篇中，我们已经建立了一个向导想生成项目，这一篇中将介绍怎样在Eclipse透视图中建立一个项目及所需的东西。
首先，我们在向导点击Finish完后，然后生成一个项目，如图：
这里就不多说了，贴出代码出来：
NewCodeGenWizard
1 /** *//**
2
* @see org.eclipse.jface.wizard.Wizard#performFinish()
3
*/
4 public boolean performFinish() 
{
5 createJavaProject();
6
if (_newProject == null) {
7 return false;
8 } else {
9 updatePerspective();
10 selectAndReveal(_newProject);
11 return true;
12
}
13 }
14
15 /** *//**
16 * 创建一个Java项目
17 */
18 public void createJavaProject() {
19 _newProject = createNewProject();
20 IJavaProject ijavaproject = JavaCore.create(_newProject);
21 try {
22 createOutputLocation(ijavaproject);
23 addJavaBuilder(ijavaproject);
24 setClasspath(ijavaproject);
25 _newProject.build(IncrementalProjectBuilder.FULL_BUILD, null);
26 } catch (JavaModelException e) {
27 e.printStackTrace();
28 } catch (CoreException e) {
29 e.printStackTrace();
30 }
31 }
32
33 /** *//**
34 * 创建一个新项目
35 *
36 * @return
37 */
38 private IProject createNewProject() {
39 if (_newProject != null)
40 return _newProject;
41
42 // 得到一个项目的句柄
43 final IProject newProjectHandle = _mainPage.getProjectHandle();
44
45 // 得到一个项目的描述
46 IPath newPath = null;
47 if (!_mainPage.useDefaults())
48 newPath = _mainPage.getLocationPath();
49
50 IWorkspace workspace = ResourcesPlugin.getWorkspace();
51 final IProjectDescription description = workspace
52 .newProjectDescription(newProjectHandle.getName());
53 description.setLocation(newPath);
54
55 // 增加Java Nature，否则在ijavaproject.setOutputLocation这句就会出错
56 addJavaNature(description);
57
58 // 创建一个项目的操作
59 WorkspaceModifyOperation op = new WorkspaceModifyOperation() {
60 protected void execute(IProgressMonitor monitor)
61 throws CoreException {
62 createProject(description, newProjectHandle, monitor);
63 }
64 };
65
66 // 运行一个新的项目操作，即会执行op中的execute方法
67 try {
68 getContainer().run(true, true, op);
69 } catch (InterruptedException e) {
70 return null;
71 } catch (InvocationTargetException e) {
72 return null;
73 }
74
75 _newProject = newProjectHandle;
76
77 return _newProject;
78 }
79
80 /** *//**
81 * 增加Java的Nature
82 *
83 * @param iprojectdescription
84 */
85 private void addJavaNature(IProjectDescription iprojectdescription) {
86 ArrayList arraylist = new ArrayList();
87 arraylist.addAll(Arrays.asList(iprojectdescription.getNatureIds()));
88 arraylist.add("org.eclipse.jdt.core.javanature");
89 iprojectdescription.setNatureIds((String[]) arraylist
90 .toArray(new String[arraylist.size()]));
91 }
92
93 /** *//**
94 * 创建一个新项目
95 *
96 * @param description
97 * @param projectHandle
98 * @param monitor
99 * @throws CoreException
100 * @throws OperationCanceledException
101 */
102 private void createProject(IProjectDescription description,
103 IProject projectHandle, IProgressMonitor monitor)
104 throws CoreException, OperationCanceledException {
105 try {
106 monitor.beginTask("", 2000);
107
108 projectHandle.create(description, new SubProgressMonitor(monitor,
109 1000));
110
111 if (monitor.isCanceled())
112 throw new OperationCanceledException();
113
114 projectHandle.open(IResource.BACKGROUND_REFRESH,
115 new SubProgressMonitor(monitor, 1000));
116
117 } finally {
118 monitor.done();
119 }
120 }
121
122 /** *//**
123 * 创建输出文件
124 *
125 * @param ijavaproject
126 * @throws JavaModelException
127 * @throws CoreException
128 */
129 private void createOutputLocation(IJavaProject ijavaproject)
130 throws JavaModelException, CoreException {
131 IFolder ifolder = ijavaproject.getProject().getFolder("bin");
132 createFolder(ifolder);
133 IPath ipath = ifolder.getFullPath();
134 ijavaproject.setOutputLocation(ipath, null);
135 }
136
137 /** *//**
138 * 增加Java生成器
139 *
140 * @param ijavaproject
141 * @throws CoreException
142 */
143 private void addJavaBuilder(IJavaProject ijavaproject) throws CoreException {
144 IProjectDescription iprojectdescription = ijavaproject.getProject()
145 .getDescription();
146 ICommand icommand = iprojectdescription.newCommand();
147 icommand.setBuilderName("org.eclipse.jdt.core.javabuilder");
148 iprojectdescription.setBuildSpec(new ICommand[] { icommand });
149 iprojectdescription
150 .setNatureIds(new String[] { "org.eclipse.jdt.core.javanature" });
151 ijavaproject.getProject().setDescription(iprojectdescription, null);
152 }
153
154 /** *//**
155 * 设置Classpath
156 *
157 * @param ijavaproject
158 * @throws JavaModelException
159 * @throws CoreException
160 */
161 private void setClasspath(IJavaProject ijavaproject)
162 throws JavaModelException, CoreException {
163 ijavaproject.setRawClasspath(new IClasspathEntry[0], null);
164 addSourceFolders(ijavaproject);
165 addJRELibraries(ijavaproject);
166 addCodeGenLibraries(ijavaproject);
167 }
168
169 /** *//**
170 * 增加JRE库
171 *
172 * @param ijavaproject
173 * @throws JavaModelException
174 */
175 private void addJRELibraries(IJavaProject ijavaproject)
176 throws JavaModelException {
177 ArrayList arraylist = new ArrayList();
178 arraylist.addAll(Arrays.asList(ijavaproject.getRawClasspath()));
179 arraylist.addAll(Arrays.asList(PreferenceConstants
180 .getDefaultJRELibrary()));
181 ijavaproject.setRawClasspath((IClasspathEntry[]) arraylist
182 .toArray(new IClasspathEntry[arraylist.size()]), null);
183 }
184
185 /** *//**
186 * 增加代码生成中所需要的Jar库
187 *
188 * @param ijavaproject
189 * @throws JavaModelException
190 */
191 private void addCodeGenLibraries(IJavaProject ijavaproject)
192 throws JavaModelException {
193// TODO:添加代码生成项目中所需要的Jar包
194 }
195
196 /** *//**
197 * 增加多个源文件目录
198 *
199 * @param ijavaproject
200 * @throws JavaModelException
201 * @throws CoreException
202 */
203 private void addSourceFolders(IJavaProject ijavaproject)
204 throws JavaModelException, CoreException {
205 ArrayList arraylist = new ArrayList();
206 arraylist.addAll(Arrays.asList(ijavaproject.getRawClasspath()));
207 addSourceFolder(ijavaproject, arraylist, "src/java");
208 addSourceFolder(ijavaproject, arraylist, "src/resource");
209 ijavaproject.setRawClasspath((IClasspathEntry[]) arraylist
210 .toArray(new IClasspathEntry[arraylist.size()]), null);
211 }
212
213 /** *//**
214 * 增加源文件目录
215 *
216 * @param ijavaproject
217 * @param arraylist
218 * @param s
219 * @throws CoreException
220 */
221 private void addSourceFolder(IJavaProject ijavaproject,
222 ArrayList arraylist, String s) throws CoreException {
223 IFolder ifolder = ijavaproject.getProject().getFolder(s);
224 createFolder(ifolder);
225 IPackageFragmentRoot ipackagefragmentroot = ijavaproject
226 .getPackageFragmentRoot(ifolder);
227 arraylist.add(JavaCore.newSourceEntry(ipackagefragmentroot.getPath()));
228 }
229
230 /** *//**
231 * 创建一个文件夹
232 *
233 * @param ifolder
234 * @throws CoreException
235 */
236 private void createFolder(IFolder ifolder) throws CoreException {
237 IContainer icontainer = ifolder.getParent();
238 if (icontainer != null && !icontainer.exists()
239 && (icontainer instanceof IFolder))
240 createFolder((IFolder) icontainer);
241 ifolder.create(true, true, null);
242 }
243
244 /** *//**
245 * @see org.eclipse.jface.wizard.Wizard#addPages()
246 */
247 public void addPages() {
248 super.addPages();
249 _mainPage = new WizardNewProjectCreationPage("海迈平台-代码生成");
250 _mainPage.setTitle("创建一个代码生成项目框架");
251 _mainPage.setDescription("创建一个代码生成项目框架");
252 addPage(_mainPage);
253 }
254
255 /** *//**
256 * 更新Eclipse的透视图
257 */
258 protected void updatePerspective() {
259 try {
260 IWorkbenchPage iworkbenchpage = PlatformUI.getWorkbench()
261 .getActiveWorkbenchWindow().getActivePage();
262 if (iworkbenchpage.findView("org.eclipse.ui.views.PropertySheet") == null)
263 iworkbenchpage.showView("org.eclipse.ui.views.PropertySheet");
264 } catch (PartInitException partinitexception) {
265 partinitexception.printStackTrace();
266 }
267 }
268
269 /** *//**
270 * @param iresource
271 */
272 protected void selectAndReveal(IResource iresource) {
273 selectAndReveal(iresource, _workbench.getActiveWorkbenchWindow());
274 }
275
276 /** *//**
277 * 选择该项目并显示出来
278 *
279 * @param iresource
280 * @param iworkbenchwindow
281 */
282 private void selectAndReveal(IResource iresource,
283 IWorkbenchWindow iworkbenchwindow) {
284 BasicNewResourceWizard.selectAndReveal(iresource, iworkbenchwindow);
285 }
在创建新项目的时候，要给项目描述类增加一个Java Nature，具体这个Java Nature是什么意思我不太懂
。Eclipse里面很多都采用Adopter模式，所以在WorkspaceModifyOperation中的execute方法是创建项目的核心。其他可以参考代码。相信不是很难理解。
友情小贴士：
1.在点击“完成”按钮后，调用PerformFinish方法。
2.创建一个项目的时候，可以根据page来得到Project句柄，再根据ResourcesPlugin.getWorkspace();来得到工作区，由于每个工作区都含有多个不同插件的描述，可以从工作区创建一个项目描述:workspace .newProjectDescription(newProjectHandle.getName());并设置相应的路径（可以从Page中得到），并为项目描述增加一些必要的信息，如JavaNature。真正创建项目： projectHandle.create(description, new SubProgressMonitor(monitor,1000), projectHandle.open(IResource.BACKGROUND_REFRESH,new SubProgressMonitor(monitor, 1000));
3.为项目设置Java编译器，
ICommand icommand = iprojectdescription.newCommand();
icommand.setBuilderName("org.eclipse.jdt.core.javabuilder");
iprojectdescription.setBuildSpec(new ICommand[] { icommand });
4.为项目设置源路径
ArrayList arraylist = new ArrayList();
arraylist.addAll(Arrays.asList(ijavaproject.getRawClasspath()));
addSourceFolder(ijavaproject, arraylist, "src/java");
addSourceFolder(ijavaproject, arraylist, "src/resource");
ijavaproject.setRawClasspath((IClasspathEntry[]) arraylist.toArray(new IClasspathEntry[arraylist.size()]), null);
5.更新透视图
1 IWorkbenchPage iworkbenchpage = PlatformUI.getWorkbench()
2 .getActiveWorkbenchWindow().getActivePage();
3 if (iworkbenchpage.findView("org.eclipse.ui.views.PropertySheet") == null)
4 iworkbenchpage.showView("org.eclipse.ui.views.PropertySheet");
6.显示项目出来
BasicNewResourceWizard.selectAndReveal(iresource, iworkbenchwindow);