1. 刷新资源
对于刷新资源关键接口是org.eclipse.core.resources.IResource，只需要调用接口的refreshLocal，比如：
refreshLocal(IResource.DEPTH_INFINITE, null)
2. 获取项目
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
IProject project = root.getProject(projectName);
3. 打开perspective
IWorkbench workbench = PlatformUI.getWorkbench();
if(workbench != null){
IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();
if(window != null){
try {
workbench.showPerspective("perspective id", window);
} catch (WorkbenchException e1) {
e1.printStackTrace();
}
}
}
4. 打开viewer
//方式1
IViewPart view = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView("viewer id");
//方式2
IWorkbenchWindow window PlatformUI.getWorkbench().getActiveWorkbenchWindow();
IWorkbenchPage activePage = window.getActivePage();
IViewPart view = activePage.findView("viewer id");
activePage.activate(view);
5. 打开editor
try {
IDE.openEditor(window.getActivePage(), input(implements IEditorInput), "editor id");
} catch (PartInitException e) {
e.printStackTrace();
}
6. IFile与File的转换
IPath path = new Path(temp.getFilePath());
// get project
IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject("project name");
String relativePath = path.toString().substring(project.getLocation().toString().length() + 1);
IFile file = project.getFile(relativePath);
7. label自动换行
Label mylabel = new Label(composite, SWT.WRAP);
mylabel.setText(“xxxxxx”);
mylabel .pack();
要实现有换行效果的Label只需要在创建Label时，给它的Style设置为SWT.Wrap，然后对其进行pack操作即可。
8.Java split()方法
split() 方法根据匹配给定的正则表达式来拆分字符串。
注意： . 、 $、 | 和 * 等转义字符，必须得加 \。
注意：多个分隔符，可以用 | 作为连字符。
9.对editor中添加、删除marker
import org.eclipse.core.resources.IMarker;
private void createWarningMarker(String lineNumber, String errorMessage,
IFile currentFile) {
IMarker marker;
try {
if (currentFile == null || !currentFile.exists()) {
return;
}
marker = currentFile.createMarker(IMarker.PROBLEM);
if (marker.exists()) {
marker.setAttribute(IMarker.MESSAGE, errorMessage);
marker.setAttribute(IMarker.LINE_NUMBER,
Integer.parseInt(lineNumber));
marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_WARNING);
marker.setAttribute(IMarker.LOCATION,
Integer.parseInt(lineNumber));
}
} catch (CoreException e) {
e.printStackTrace();
}
}
private void removeWarningMarker(List<Integer> errorLines, IFile currentFile) {
try {
IMarker[] markers = currentFile.findMarkers(IMarker.PROBLEM, false, 0);
for(IMarker marker : markers) {
if(!errorLines.contains(marker.getAttribute(IMarker.LINE_NUMBER, -5))) {
marker.delete();
}
}
} catch (CoreException e) {
e.printStackTrace();
}
}
10. Ant 执行 Java 代码
public class NotifyAdministrator
{
public static void main(String[] args)
{
String email = args[0];
notifyAdministratorviaEmail(email);
System.out.println("Administrator "+email+" has been notified");
}
public static void notifyAdministratorviaEmail(String email
{
//......
}
}
build.xml
<?xml version="1.0"?>
<project name="sample" basedir="." default="notify">
<target name="notify">
<java fork="false" failonerror="yes" classname="NotifyAdministrator">
<arg line="admin@test.com"/>
<classpath>
<pathelement location="dist/test.jar"/>
<pathelement path="${java.class.path}"/>
</classpath>
</java>
</target>
</project>
实际使用中，需要先编译java文件，然后将其加入classpath，才能执行到。
<arg value="-l -a"/> is a single command-line argument containing a space character, not separate options -l and -a.
<arg line="-l -a"/> This is a command line with two separate options, -l and -a.
11. 动态刷新ToolBar的图片
扩展Eclipse的快捷工具栏的时候，经常会碰到一些类似于开关的问题，比如需要根据某个状态或开关量来显示不同的图片，但是IHandler或AbstractHandler只给出了定义回调的执行函数，并没有给出操作UI相关的方法，其实只需要实现一个接口IElementUpdater即可
public class TestAction extends AbstractHandler implements IElementUpdater{
public static boolean isOn = false;
private static ImageDescriptor IMAGE_ON = UIActivator.getImageDescriptor("icons/on.gif");
private static ImageDescriptor IMAGE_OFF = UIActivator.getImageDescriptor("icons/off.gif");
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
if(!isOn){
System.out.println("on");
isOn = true;
}else{
System.out.println("off");
isOn = false;
}
Display.getDefault().asyncExec(new Runnable() {
@Override
public void run() {
ICommandService commandService = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getService(ICommandService.class);
if(commandService != null){
commandService.refreshElements("com.zj.test.ui.commands.on", null);
}
}
});
return null;
}
@Override
public void updateElement(UIElement element, Map parameters) {
if(!isOn){
element.setIcon(IMAGE_ON);
element.setTooltip("on");
}else{
element.setIcon(IMAGE_OFF);
element.setTooltip("off");
}
}
}
12. SWT中颜色、字体获取
//三种颜色获取方式
final Color white = new Color(display, 255, 255, 255);
final Color sysBlack = Display.getCurrent().getSystemColor(SWT.COLOR_BLACK);
final Color swtBlue = SWTResourceManager.getColor(SWT.COLOR_LIST_SELECTION);
Font font = new Font(e.display, "Arial", 14, SWT.BOLD | SWT.ITALIC);
// use gc draw line and image
public class CanvasSample {
private Image image = null;
private Shell shell = null;
private Canvas canvas = null;
public CanvasSample(){
createContent();
}
public void createContent(){
shell = new Shell();
shell.setLayout(new FillLayout());
image = new Image(shell.getDisplay(), getClass().getResourceAsStream("1.gif"));
canvas = new Canvas(shell, SWT.NONE);
canvas.addPaintListener(new PaintListener(){
public void paintControl(PaintEvent e){
//绘制图像
e.gc.drawImage(image, 10, 10);
//绘制椭圆
e.gc.drawOval(20, 20, 200, 100);
//绘制直线
e.gc.drawLine(20,10,100,20);
Font font = new Font(e.display, "Arial", 14, SWT.BOLD | SWT.ITALIC);
//绘制字符串
e.gc.drawString("This is a String", 30, 20);
//设置display前景色
e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_GREEN));
//设置display字体
e.gc.setFont(font);
//设置display 背景色
e.gc.setBackground(e.display.getSystemColor(SWT.COLOR_DARK_GRAY));
//再绘制字符串
e.gc.drawString("This is a String", 30, 50);
font.dispose();
}
});
shell.setSize(200, 150);
}
public static void main(String[] args){
Display display = Display.getDefault();
CanvasSample cSample = new CanvasSample();
cSample.getShell().open();
while(!cSample.getShell().isDisposed()){
if(!display.readAndDispatch())
display.sleep();
}
cSample.getImage().dispose();
display.dispose();
}
}
13. shell的两种获取方式
Display.getDefault().getActiveShell() 获取当前窗口的shell
PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell() 获取当前应用程序的shell
14. 在ant脚本中对外部ant任务的调用
<target name="copy_lib" description="Copy library files from project1 to project2">
<ant antfile="build.xml"
dir="${project1dir}"
inheritall="false"
inheritrefs="false"
target="copy_to_project2_lib">
<property name="param1" value="version 1.x"/>
</ant>
</target>
antfile表示子项目的构建文件。
dir表示构建文件所再的目录，缺省为当前目录。
inheritall表示父项目的所有属性在子项目中都可使用，并覆盖子项目中的同名属性。缺省为true。
inheritrefs表示父项目中的所有引用在子项目中都可以使用，并且不覆盖子项目中的同名引用。缺省为false。如果在ant任务中显示的定义引用，如上例
Eclipse插件入门—–刷新资源
Java Task in Ant
Ant 执行 Java 代码
eclipse 资源监听
How You’ve Changed! - Eclipse IResourceChangeListener
Ant Target
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