您好我有以下类想要替换为stjs，但它似乎对我不起作用，因为stjs不包括所有applet库，但是如果这可以通过stjs或任何其他技术完成？提前致谢
package org.stjs.examples.hello;
import java.applet.Applet;
import java.awt.Button;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.Rectangle;
import java.awt.TextArea;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.text.BreakIterator;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Locale;
import java.util.StringTokenizer;
public class DataCache
extends Applet
implements ActionListener
{
private static final String APPLET_VERSION = "1.6.0";
private static final int MSG_WIN_HEIGHT = 179;
private static final int MSG_WIN_WIDTH = 288;
private static final String MSG_WIN_ETITLE = "Error Message";
private static final String MSG_WIN_MTITLE = "Information Message";
public String m_error = "";
public String m_message = "";
public String m_currCacheString = "";
public StringBuffer m_currXMLCache = null;
public Hashtable m_currHashCache = null;
private String m_commandKey;
private Hashtable m_XMLCache = new Hashtable();
private Hashtable m_hashCache = new Hashtable();
private String m_key = "";
private String m_keyList = "";
private String m_file = "";
private String m_dataDir = "";
private String m_autoLoad = "TRUE";
private String m_servletURL = "";
private String m_debugApplet = "";
private Frame m_msgWindow;
private TextArea m_msgText;
private Button m_msgButton;
private FontMetrics m_msgMetrics;
private int m_msgTextHeight;
public void destroy()
{
this.m_msgWindow.dispose();
}
public void init()
{
createErrorWindow();
alertStatus("applet version: 1.6.0", 'D');
this.m_debugApplet = getAppParam("debugApplet");
this.m_autoLoad = getAppParam("autoLoad");
this.m_commandKey = getAppParam("commandKey");
String ls = getAppParam("loadStatic");
String dataDir = getAppParam("dataDir");
this.m_servletURL = getAppParam("servletURL");
URL url = getCodeBase();
int port = url.getPort();
if (this.m_debugApplet.equals("TRUE")) {
System.out.println("url: " + this.m_servletURL);
} else if (port != -1) {
this.m_servletURL = ("http://" + url.getHost() + ":" + port + this.m_servletURL);
} else {
this.m_servletURL = ("http://" + url.getHost() + this.m_servletURL);
}
setDataDir(dataDir);
if (!this.m_autoLoad.toUpperCase().equals("FALSE")) {
if ((ls.equals("")) || (ls.toUpperCase().equals("FALSE")))
{
alertStatus("loading non-static...", 'D');
loadAllData(false);
}
else if (ls.toUpperCase().equals("TRUE"))
{
alertStatus("loading static...", 'D');
openAllData(false);
}
}
}
public void actionPerformed(ActionEvent e)
{
String s = e.getActionCommand();
if (s.equals("OK")) {
this.m_msgWindow.hide();
}
}
private void createErrorWindow()
{
this.m_msgWindow = new Frame("New Title");
Panel p1 = new Panel();
Panel p2 = new Panel();
Panel p3 = new Panel();
p1.setLayout(new GridLayout(2, 1));
this.m_msgText = new TextArea("New Message", 3, 40, 1);
this.m_msgText.setEditable(false);
this.m_msgText.setFont(new Font("Dialog", 0, 8));
this.m_msgMetrics = this.m_msgText.getFontMetrics(this.m_msgText.getFont());
p2.add(this.m_msgText);
p1.add(p2);
this.m_msgButton = new Button(" OK ");
this.m_msgButton.addActionListener(this);
this.m_msgButton.setActionCommand("OK");
p3.add(this.m_msgButton);
p1.add(p3);
this.m_msgWindow.add(p1);
this.m_msgWindow.pack();
Toolkit t = this.m_msgWindow.getToolkit();
this.m_msgTextHeight = this.m_msgMetrics.getHeight();
this.m_msgWindow.setBounds(new Rectangle(
t.getScreenSize().width / 2 - 144,
t.getScreenSize().height / 2 - 89,
288,
179));
}
public void setDataDir(String s)
{
try
{
if ((s != null) && (s.length() > 0))
{
if (s.charAt(s.length() - 1) != '\\') {
s = s + "\\";
}
this.m_dataDir = s;
}
}
catch (Exception e)
{
e.printStackTrace();
alertStatus(e.getMessage(), 'E');
alertStatus(s, 'E');
}
}
private String getAppParam(String s)
{
String param = getParameter(s);
if (param == null) {
return "";
}
return param;
}
private String alertStatus(String source, Exception e, char status)
{
e.printStackTrace(System.out);
return alertStatus(source + " -- " + e.getMessage(), status);
}
private String alertStatus(String s, char status)
{
switch (status)
{
case 'E':
this.m_error = s;
System.out.println(s);
showStatus(s);
this.m_msgWindow.setTitle("Error Message");
setWrapText(s);
this.m_msgButton.setEnabled(true);
this.m_msgWindow.show();
return s;
case 'M':
this.m_message = s;
System.out.println(s);
showStatus(s);
this.m_msgWindow.setTitle("Information Message");
setWrapText(s);
this.m_msgButton.setEnabled(true);
this.m_msgWindow.show();
return s;
case 'S':
this.m_message = s;
System.out.println(s);
showStatus(s);
this.m_msgWindow.setTitle("Information Message");
setWrapText(s);
this.m_msgButton.setEnabled(false);
this.m_msgWindow.show();
return s;
case 'D':
System.out.println(s);
return s;
}
return "";
}
private void setWrapText(String s)
{
BreakIterator boundary = BreakIterator.getWordInstance(Locale.US);
String line = "";
int maxWidth = this.m_msgText.getSize().width;
this.m_msgText.setText("");
boundary.setText(s);
int start = boundary.first();
int end = boundary.next();
while (end != -1)
{
String tmp = s.substring(start, end);
if (this.m_msgMetrics.stringWidth(line + tmp) > maxWidth)
{
this.m_msgText.append(line + "\n");
line = tmp;
}
else
{
line = line + tmp;
}
start = end;
end = boundary.next();
if (end == -1) {
this.m_msgText.append(line);
}
}
this.m_msgText.append(s.substring(start));
}
private void makeDirectories(String dir)
{
String fdir = dir;
AccessController.doPrivileged(new PrivilegedAction()
{
private final String val$fdir="";
public Object run()
{
String subdir = "";
int i = this.val$fdir.indexOf('\\');
while (i != -1)
{
subdir = this.val$fdir.substring(0, i);
File f = new File(subdir);
if (!f.isDirectory()) {
f.mkdir();
}
i = this.val$fdir.indexOf('\\', i + 1);
}
return null;
}
});
}
private boolean verifyDataFile(String s)
{
String fs = s;
Boolean retVal =
(Boolean)AccessController.doPrivileged(new PrivilegedAction()
{
private final String val$fs="";
public Object run()
{
File f = new File(this.val$fs);
if (!f.isFile()) {
return new Boolean(false);
}
return new Boolean(true);
}
});
return retVal.booleanValue();
}
private String verifyDataFilesInternal()
{
try
{
AccessController.doPrivileged(new PrivilegedAction()
{
public Object run()
{
File dir = new File(DataCache.this.m_dataDir);
if (!dir.isDirectory()) {
dir.mkdirs();
}
return dir;
}
});
StringTokenizer st = new StringTokenizer(this.m_commandKey, ";");
while (st.hasMoreElements())
{
String key = (String)st.nextElement();
if (!verifyDataFile(this.m_dataDir + key + ".data")) {
return "Data cache file " + this.m_dataDir + key + ".data could not be found.";
}
if (!verifyDataFile(this.m_dataDir + key + ".hash")) {
return "Data cache file " + this.m_dataDir + key + ".hash could not be found.";
}
}
return "";
}
catch (Exception e)
{
e.printStackTrace();
return e.getMessage();
}
}
private String loadAllDataInternal()
{
String status = "";
String key = "";
StringBuffer data = new StringBuffer("");
Hashtable hash = null;
alertStatus("loading data internal", 'D');
URLConnection connection;
ObjectInputStream in;
try
{
if (this.m_servletURL.equals("")) {
return alertStatus("Servlet URL not specified!", 'E');
}
try
{
URL inURL = new URL(this.m_servletURL);
connection = inURL.openConnection();
}
catch (Exception e)
{
e.printStackTrace();
return alertStatus("Error opening server connection: " + e.getMessage(), 'E');
}
try
{
// URLConnection connection;
URL inURL;
in = new ObjectInputStream(connection.getInputStream());
}
catch (Exception e)
{
e.printStackTrace();
return alertStatus("Error opening input stream: " + e.getMessage(), 'E');
}
int count;
try
{
count = Integer.parseInt((String)in.readObject());
}
catch (Exception e)
{
e.printStackTrace();
return alertStatus("Error getting object count: " + e.getMessage(), 'E');
}
this.m_XMLCache = new Hashtable(count, 1.0F);
this.m_hashCache = new Hashtable(count, 1.0F);
for (int i = 0; i < count; i++)
{
key = "";
data = new StringBuffer("");
status = (String)in.readObject();
alertStatus("read status", 'D');
key = (String)in.readObject();
alertStatus("read key", 'D');
data = (StringBuffer)in.readObject();
alertStatus("read data", 'D');
hash = (Hashtable)in.readObject();
alertStatus("read cache", 'D');
if (status.equals("connection closed")) {
return alertStatus("Error communicating with servlet: Connection is closed. Please re-login.", 'E');
}
if (status.equals("execution error")) {
return alertStatus("Error in servlet: Error during execution of query. Please notify Data Management.", 'E');
}
if (data == null) {
return alertStatus("Error communicating with servlet: There was a data transmission error. Please notify Data Management.", 'E');
}
alertStatus("got cache: " + key, 'D');
this.m_XMLCache.put(key, data);
this.m_hashCache.put(key, hash);
}
alertStatus("closing stream", 'D');
in.close();
return "";
}
catch (Exception e)
{
e.printStackTrace();
return "Error in loadAllDataInternal: " + e.getMessage();
}
}
private String openAllDataInternal(String path)
{
ObjectInputStream in = null;
String file = "";
StringBuffer data = new StringBuffer("");
Hashtable hash = null;
String status = "";
try
{
status = verifyDataFilesInternal();
if (!status.equals("")) {
return status;
}
StringTokenizer st = new StringTokenizer(this.m_commandKey, ";");
int len = st.countTokens();
this.m_XMLCache = new Hashtable(len, 1.0F);
this.m_hashCache = new Hashtable(len, 1.0F);
while (st.hasMoreElements())
{
String key = (String)st.nextElement();
file = path + key + ".data";
in = new ObjectInputStream(new FileInputStream(file));
data = (StringBuffer)in.readObject();
in.close();
file = path + key + ".hash";
in = new ObjectInputStream(new FileInputStream(file));
hash = (Hashtable)in.readObject();
in.close();
this.m_XMLCache.put(key, data);
this.m_hashCache.put(key, hash);
}
return "";
}
catch (Exception e)
{
e.printStackTrace();
return "Error in openAllDataInternal: " + e.getMessage();
}
}
private String saveAllDataInternal(String s)
{
Enumeration keys = null;
String file = "";
StringBuffer data = new StringBuffer("");
Hashtable hash = null;
ObjectOutputStream out = null;
if (s.equals("")) {
return alertStatus("Data file path is '': " + s, 'E');
}
try
{
keys = this.m_XMLCache.keys();
makeDirectories(s);
while (keys.hasMoreElements())
{
this.m_key = ((String)keys.nextElement());
file = s + this.m_key;
data = (StringBuffer)this.m_XMLCache.get(this.m_key);
hash = (Hashtable)this.m_hashCache.get(this.m_key);
out = new ObjectOutputStream(new FileOutputStream(file + ".data"));
out.writeObject(data);
out.close();
out = new ObjectOutputStream(new FileOutputStream(file + ".hash"));
out.writeObject(hash);
out.close();
}
return "";
}
catch (Exception e)
{
e.printStackTrace();
return "Error in saveAllDataInternal: " + e.getMessage();
}
}
public String loadAllData(boolean verbose)
{
String s =
(String)AccessController.doPrivileged(new PrivilegedAction()
{
public Object run()
{
return DataCache.this.loadAllDataInternal();
}
});
if (verbose) {
if (s.equals("")) {
alertStatus("Loaded all data!", 'M');
} else {
alertStatus(s, 'E');
}
}
return s;
}
public String saveAllData(boolean verbose, String path)
{
String fpath = path;
String s =
(String)AccessController.doPrivileged(new PrivilegedAction()
{
private final String val$fpath="";
public Object run()
{
return DataCache.this.saveAllDataInternal(this.val$fpath);
}
});
if (verbose) {
if (s.equals("")) {
alertStatus("Saved all data files!", 'M');
} else {
alertStatus(s, 'E');
}
}
return s;
}
public String saveAllData(boolean verbose)
{
String s =
(String)AccessController.doPrivileged(new PrivilegedAction()
{
public Object run()
{
return DataCache.this.saveAllDataInternal(DataCache.this.m_dataDir);
}
});
if (verbose) {
if (s.equals("")) {
alertStatus("Saved all data files!", 'M');
} else {
alertStatus(s, 'E');
}
}
return s;
}
public String openAllData(boolean verbose)
{
String s =
(String)AccessController.doPrivileged(new PrivilegedAction()
{
public Object run()
{
return DataCache.this.openAllDataInternal(DataCache.this.m_dataDir);
}
});
if ((s.equals("")) && (verbose)) {
alertStatus("Opened all data files!", 'M');
}
return s;
}
public String verifyAllDataFiles(boolean verbose)
{
String s = verifyDataFilesInternal();
if ((s.equals("")) && (verbose)) {
alertStatus("Verified all data files!", 'M');
}
return s;
}
public void setCache(String key, boolean verbose)
{
this.m_currXMLCache = ((StringBuffer)this.m_XMLCache.get(key));
this.m_currHashCache = ((Hashtable)this.m_hashCache.get(key));
this.m_currCacheString = key;
if (((this.m_currXMLCache == null) || (this.m_currHashCache == null)) &&
(verbose)) {
alertStatus("Requested cache (" + this.m_currCacheString + ") is null!", 'E');
}
}
public String getXML(String key)
{
this.m_currXMLCache = ((StringBuffer)this.m_XMLCache.get(key));
this.m_currHashCache = ((Hashtable)this.m_hashCache.get(key));
this.m_currCacheString = key;
return getXML();
}
public String getXML()
{
if (this.m_currXMLCache == null)
{
alertStatus("Current cache (" + this.m_currCacheString + ") is null!", 'E');
return "";
}
return this.m_currXMLCache.toString();
}
public String lookupCacheValue(String code)
{
String[] values = (String[])this.m_currHashCache.get(code);
return values[1];
}
private void printData(String[][] data)
{
alertStatus("printing data", 'D');
for (int i = 0; i < data[0].length; i++) {
System.out.println("key: " + data[0][i] + "\tvalue: " + data[1][i]);
}
}
}