SWT与Eclipse插件（RCP）不同。SWT比较原生，后者是基于前者而起的一个框架，它能结合Eclipse提供的功能自动的打成一个exe的可执行文件。而SWT需要做额外的操作。
本文记述了SWT项目搭建、打包（可执行jar）、部署（exe）的全过程。
一、SWT 项目搭建- 创建java项目
File -> new -> java project 或如下图创建 Java Project 填写项目信息
我用的是jdk11，提示时候创建swt03的模块，点击 don't create
生成的标准 java 项目如下图
在根目录下新建lib包，以便存放扩展jar包，此时项目结构如下
- 制作swtjar包
如图找到Eclipse安装目录的 plugins 目录
使用org.eclipse.swt寻找 org.eclipse.swt.win32.win32.x86_64_xxxxxxxxxxxx.jar，如下图所示
将org.eclipse.swt.win32.win32.x86_64_xxxxxxxxxxxx.jar拷到文件夹lib中，并将其改名为swt.jar
选中swt.jar,右击->Build Path->add to Build Path ，此时项目结构如下图
可以此为例添加任何需要的jar
- 制作 swt UI
src下创建包，比如com.xzbd在包中创建类SWT01.java ，如下
package com.xzbd;
import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
public class SWT03 {
static Display display;
static Shell shell;
static Text dogName;
static Combo dogBreed;
static Canvas dogPhoto;
static Image dogImage;
static List categories;
static Text ownerName;
static Text ownerPhone;
public static void main(String[] args) {
display = new Display();
shell = new Shell(display);
shell.setText("Dog Show Entry");
GridLayout gridLayout = new GridLayout();
gridLayout.numColumns = 3;
shell.setLayout(gridLayout);
new Label(shell, SWT.NONE).setText("Dog's Name:");
dogName = new Text(shell, SWT.SINGLE | SWT.BORDER);
GridData gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
gridData.horizontalSpan = 2;
dogName.setLayoutData(gridData);
new Label(shell, SWT.NONE).setText("Breed:");
dogBreed = new Combo(shell, SWT.NONE);
dogBreed.setItems(new String [] {"Collie", "Pitbull", "Poodle", "Scottie"});
dogBreed.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
Label label = new Label(shell, SWT.NONE); label.setText("Categories");
label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_CENTER));
new Label(shell, SWT.NONE).setText("Photo:");
dogPhoto = new Canvas(shell, SWT.BORDER);
gridData = new GridData(GridData.FILL_BOTH);
gridData.widthHint = 80;
gridData.heightHint = 80;
gridData.verticalSpan = 3;
dogPhoto.setLayoutData(gridData);
dogPhoto.addPaintListener(new PaintListener() {
public void paintControl(final PaintEvent event) {
if (dogImage != null) {
event.gc.drawImage(dogImage, 0, 0);
}
}
});
categories = new List(shell, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL);
categories.setItems(new String [] {"Best of Breed", "Prettiest Female", "Handsomest Male","Best Dressed", "Fluffiest Ears", "Most Colors", "Best Performer", "Loudest Bark", "Best Behaved","Prettiest Eyes", "Most Hair", "Longest Tail","Cutest Trick"});
gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL);
gridData.verticalSpan = 4;
int listHeight = categories.getItemHeight() * 12;
Rectangle trim = categories.computeTrim(0, 0, 0, listHeight);
gridData.heightHint = trim.height;
categories.setLayoutData(gridData);
Button browse = new Button(shell, SWT.PUSH);
browse.setText("Browse...");
gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
gridData.horizontalIndent = 5;
browse.setLayoutData(gridData);
browse.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
String fileName = new FileDialog(shell).open();
if (fileName != null) {
dogImage = new Image(display, fileName);
}
}
});
Button delete = new Button(shell, SWT.PUSH);
delete.setText("Delete");
gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_BEGINNING);
gridData.horizontalIndent = 5;
delete.setLayoutData(gridData);
delete.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
if (dogImage != null) {
dogImage.dispose();
dogImage = null;
dogPhoto.redraw();
}
}
});
Group ownerInfo = new Group(shell, SWT.NONE);
ownerInfo.setText("Owner Info");
gridLayout = new GridLayout();
gridLayout.numColumns = 2;
ownerInfo.setLayout(gridLayout);
gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
gridData.horizontalSpan = 2;
ownerInfo.setLayoutData(gridData);
new Label(ownerInfo, SWT.NONE).setText("Name:");
ownerName = new Text(ownerInfo, SWT.SINGLE | SWT.BORDER);
ownerName.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
new Label(ownerInfo, SWT.NONE).setText("Phone:");
ownerPhone = new Text(ownerInfo, SWT.SINGLE | SWT.BORDER);
ownerPhone.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Button enter = new Button(shell, SWT.PUSH); enter.setText("Enter");
gridData = new GridData(GridData.HORIZONTAL_ALIGN_END); gridData.horizontalSpan = 3;
enter.setLayoutData(gridData);
enter.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
System.out.println("/nDog Name: " + dogName.getText());
System.out.println("Dog Breed: " + dogBreed.getText());
System.out.println("Owner Name: " + ownerName.getText());
System.out.println("Owner Phone: " + ownerPhone.getText());
System.out.println("Categories:");
String cats[] = categories.getSelection();
for (int i = 0; i < cats.length; i++) {
System.out.println("/t" + cats[i]);
}
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
if (dogImage != null) {
dogImage.dispose();
}
}
}
右击 > run > java application,得到如下UI
至此，项目搭建完成，此时项目结构
二、打包（可执行jar）
打包的方式有很多，此处使用Eclipse export方式
右击 > Export ,打开如下对话框
如上图选择Runnable JAR file ,点击 Next 。
点击 finish ,打开 设定的文件找到 run-swt03.jar ,双击即可执行，效果如下
三、部署（包装为exe）
