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java浏览器代码 java script浏览器( 五 )

IT技术浏览器


jEditorPane1.setPage (url);
//将url的内容添加到ArrayList对象history中
history.add(url);
//historyIndex的数值设为history对象的长度-1
historyIndex=history.size()-1;
//重新布局
jEditorPane1.setEditable(false); //add by copy editor :)
jEditorPane1.revalidate ();
}
catch(Exception ex) {
//如果链接显示失败，则弹出选择对话框“无法打开该搜索页”
JOptionPane.showMessageDialog (WebBrowser.this,"无法打开该搜索页","网页浏览器",JOptionPane.ERROR_MESSAGE);
}
}
//url不为“”，并且不以“http://”开头
else if(url.length ()0!url.startsWith ("http://")) {
//在url前面添加“http://”
url="http://"+url;
try {
jEditorPane1.setPage (url );
history.add(url);
historyIndex=history.size()-1;
jEditorPane1.setEditable(false); //add by copy editor :)
jEditorPane1.revalidate ();
}
catch(Exception ex) {
JOptionPane.showMessageDialog (WebBrowser.this,"无法打开该搜索页","网页浏览器",JOptionPane.ERROR_MESSAGE);
}
}
//没有输入url，即url为空
else if(url.length ()==0){
JOptionPane.showMessageDialog (WebBrowser.this,"请输入链接地址","网页浏览器",JOptionPane.ERROR_MESSAGE);
}
}
//输入地址后点击回车
else if (e.getSource() == jurl){
url=jurl.getText ();
if(url.length ()0url.startsWith ("http://")) {
try {
jEditorPane1.setPage (url);
history.add(url);
historyIndex=history.size()-1;
jEditorPane1.setEditable(false); //add by copy editor :)
jEditorPane1.revalidate ();
jurl.setMaximumSize (jurl.getPreferredSize ());
}
catch(Exception ex) {
JOptionPane.showMessageDialog (WebBrowser.this,"无法打开该搜索页","网页浏览器",JOptionPane.ERROR_MESSAGE);
}
}
else if(url.length ()0!url.startsWith ("http://")) {
url="http://"+url;
try {
jEditorPane1.setPage (url );
history.add(url);
historyIndex=history.size()-1;
jEditorPane1.setEditable(false); //add by copy editor :)
jEditorPane1.revalidate ();
}
catch(Exception ex) {
JOptionPane.showMessageDialog (WebBrowser.this,"无法打开该搜索页","网页浏览器",JOptionPane.ERROR_MESSAGE);
}
}
else if(url.length ()==0){
JOptionPane.showMessageDialog (WebBrowser.this,"请输入链接地址","网页浏览器",JOptionPane.ERROR_MESSAGE);
}
}
//另存为...
else if (e.getSource() == picSave||e.getSource() == saveAsItem){
url = jurl.getText ().toString ().trim();
if(url.length ()0!url.startsWith ("http://")) {
url="http://"+url;
}
if(!url.equals ("")) {
//保存文件
saveFile(url);
}
else {
JOptionPane.showMessageDialog (WebBrowser.this,"请输入链接地址","网页浏览器",JOptionPane.ERROR_MESSAGE);
}
}
//退出
else if (e.getSource() == exitItem ||e.getSource() == picExit){
System.exit(0);
}
//后退
else if (e.getSource() == backItem ||e.getSource() == picBack){
historyIndex--;
if(historyIndex0)
historyIndex = 0;
url = jurl.getText();
try{
//获得history对象中本地址之前访问的地址
url = (String)history.get(historyIndex);
jEditorPane1.setPage(url);
jurl.setText(url.toString());
jEditorPane1.setEditable(false); //add by copy editor :)
jEditorPane1.revalidate ();
}
catch(Exception ex){
}
}
//前进
else if (e.getSource() == forwardItem ||e.getSource() == picForward){
historyIndex++;
if(historyIndex = history.size())
historyIndex = history.size()-1;
url = jurl.getText();
try{
//获得history对象中本地址之后访问的地址

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