swt Browser 如何打开新url链接地址

在上一篇文章【java swing 内置浏览器打开网页显示flash图表-swt Browser应用】中我们讲解了如何在java中打开网站，但是，在实际开发中右遇到了一个问题就是如何用程序改变已经打开的网页地址，下面把自己解决问题的方法讲解一下。

首先我在程序中直接调用 Browser对象的setUrl方法，代码如下：

 browser.setUrl("http://www.xxx.cn");

程序会抛出如下异常：

Exception occurred during event dispatching:
org.eclipse.swt.SWTException: Invalid thread access
        at org.eclipse.swt.SWT.error(SWT.java:3884)
        at org.eclipse.swt.SWT.error(SWT.java:3799)
        at org.eclipse.swt.SWT.error(SWT.java:3770)
        at org.eclipse.swt.widgets.Widget.error(Widget.java:463)
        at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:355)
        at org.eclipse.swt.browser.Browser.checkWidget(Browser.java:164)
        at org.eclipse.swt.browser.Browser.setUrl(Browser.java:973)
        at zhinengkaiguanjiankong.comm.SWTPane.StartThread(SWTPane.java:42)
        at zhinengkaiguanjiankong.RealTimeSwitchDetailChart.jbtn_searchActionPerformed(RealTimeSwitchDetailChart.java:292)
        at zhinengkaiguanjiankong.RealTimeSwitchDetailChart.access$200(RealTimeSwitchDetailChart.java:32)
        at zhinengkaiguanjiankong.RealTimeSwitchDetailChart$2.actionPerformed(RealTimeSwitchDetailChart.java:186)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.Component.processMouseEvent(Component.java:6267)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6032)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2478)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
        at java.awt.Dialog$1.run(Dialog.java:1046)
        at java.awt.Dialog$3.run(Dialog.java:1098)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.awt.Dialog.show(Dialog.java:1096)
        at java.awt.Component.show(Component.java:1563)
        at java.awt.Component.setVisible(Component.java:1515)
        at java.awt.Window.setVisible(Window.java:842)
        at java.awt.Dialog.setVisible(Dialog.java:986)
        at zhinengkaiguanjiankong.RealTimeSwitchDetailChart$4.run(RealTimeSwitchDetailChart.java:315)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

该解决方案被否定，以失败告终。

 

然后又在网上baidu,google了一下，发现问题如下：

在非SWT线程的线程里想要修改SWT界面,都要通过上面类似的办法来做,不然就会报错的,解决方法如下：

 

 Display.getDefault().syncExec(new Runnable() {

            public void run() {
                browser.setUrl("http://www.ccc.cn");
            }
        });

最主要是红色字体的地方代码，大家注意一下。