web应用--查询机中展现

1、大体说明

在查询机上访问web应用进行查询，所以采用在查询机上运行桌面程序（swt中嵌入browser 访问web服务），并在查询机开启时运行该程序。

2、桌面程序源码

public class QueryBrowser {
	Display display = new Display();
	Shell shell = new Shell(display, SWT.NO_TRIM);
	public static final String DEFAULT_URL = "http://192.168.1.101:8080/test/hello.html";
	Browser browser;

	//读取配置文件中url属性
	public static String getQueryUrl() {
		Properties prop = new Properties();
		try {
			InputStream is = new FileInputStream(Utils.APP_INI_FILE);
			prop.load(is);
			is.close();
		} catch (Exception e) {
			e.printStackTrace();
		}

		return Utils.getProperty(prop, "url", DEFAULT_URL);
	}

	public QueryBrowser() {
		shell.setLayout(new GridLayout());

		browser = new Browser(shell, SWT.BORDER);
		browser.setLayoutData(new GridData(GridData.FILL_BOTH));

		//判断页面是否可以正常访问
		if (URLAvailability.isConnect(getQueryUrl()))
			browser.setUrl(getQueryUrl());
		else
			browser.setText("<HTML><BODY><table border='0' width='100%' height='600'><tr><td align='center'><h1>无法访问页面,请检查网络...</h1></td></tr></table></BODY></HTML>");

		// initialize(display, browser);

		shell.setMaximized(true);
		shell.open();

		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				// If no more entries in event queue
				display.sleep();
			}
		}

		display.dispose();
	}

	public static void main(String[] args) {
		new QueryBrowser();
	}
}

说明：

shell.setMaximized(true); //这里是关键，可以铺满整个显示屏幕

2、Utils.java 、URLAvailability.java

读取配置文件XXX.ini中url属性值

public class Utils {

	public static final File APP_PATH = new File("").getAbsoluteFile();
	public static final File APP_INI_FILE = new File(APP_PATH, "XXX.ini").getAbsoluteFile();
	static {
		//APP_TEMP.mkdir();
		try {
			if (!APP_INI_FILE.exists())
				APP_INI_FILE.createNewFile();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public static String getProperty(Properties prop, String key,String defaultValue) {
		String s = prop.getProperty(key);
		if (s == null) {
			s = defaultValue;
		}
		return s;
	}
}

判断url是否可以正常访问

public class URLAvailability {

	private static URL urlStr;
	private static HttpURLConnection connection;
	private static int state = -1;
	private static boolean connec = false;

	public static boolean isConnect(String url) {
		if (url == null || url.length() <= 0) {
			connec = false;
		}
		try {
			urlStr = new URL(url);
			connection = (HttpURLConnection) urlStr.openConnection();
			state = connection.getResponseCode();
			if (state == 200) {
				connec = true;
			}
		} catch (Exception ex) {
			connec = false;
		}
		return connec;
	}
}

3、XXX.ini中url属性值设置

url=http\://192.168.1.101\:8080/test/hello.html

4、制作运行程序，并将运行启动文件（如run.bat）加入系统启动项中。

web应用--查询机中展现

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