我現在不細說功能,而是說明如何儲存使用痕迹,比如上圖,我在"old path"輸入了"com\common\jn\img\path.png",我想下次打開時"old path"自動儲存上一次的記錄.
如何實作呢?
(1)可以把文本框的内容儲存到properties配置檔案中;
(2)關閉視窗或者按下ctrl+s 時觸發儲存事件
(3)下次啟動視窗時,從配置檔案中讀取使用痕迹,并恢複到界面上.
具體實作如下
配置檔案為
public static final string configfilepath="c:\\.path_config.properties";
(a)擷取界面上文本框的内容,并設定到properties中,然後寫入磁盤
/***
* 儲存到配置檔案中
* @throws ioexception
*/
protected void saveconfig() throws ioexception{
file configfile=new file(configfilepath);
if(!configfile.exists()){
try {
systemhwutil.createemptyfile(configfile);
} catch (ioexception e) {
e.printstacktrace();
guiutil23.errordialog(e);
}
}
cmdutil.show(configfilepath);//因為隐藏檔案是隻讀的
// fileutils.writetofile(configfilepath, content);
if(valuewidget.isnullorempty(props)){
props= new properties();
string old_path=oldpathtf.gettext();
if(!valuewidget.isnullorempty(old_path)){
props.setproperty(prop_key_old_path, old_path);
string folder1=this.comparefolderpanel.getfolderonetextfield().gettext();
if(!valuewidget.isnullorempty(folder1)){
props.setproperty(prop_key_compared_folderone, folder1);
string folder2=this.comparefolderpanel.getfolder2textfield().gettext();
if(!valuewidget.isnullorempty(folder2)){
props.setproperty(prop_key_compared_folder2, folder2);
string sourcefile=this.checksamepanel.getsourcefiletf().gettext();
if(!valuewidget.isnullorempty(sourcefile)){
props.setproperty(prop_key_source_file, sourcefile);
string targetfile=this.checksamepanel.gettargetfiletf().gettext();
if(!valuewidget.isnullorempty(targetfile)){
props.setproperty(prop_key_target_file, targetfile);
/***
* 增量包中,複制class時是否彈出确認提示框
*/
boolean issure=createfolderbypackage.getsurecheckbox().isselected();
props.setproperty(prop_key_copy_java_sure, string.valueof(issure));
boolean iscopypath=copycheckbox.isselected();
props.setproperty(prop_key_is_copy_path, string.valueof(iscopypath));
setcombox(prop_key_root_paths, this.createfolderbypackage.getrootfoldertextfield(),this.createfolderbypackage.getrootpathcombobox());
setcombox(prop_key_java_file_paths, this.createfolderbypackage.getclasstextfield(),this.createfolderbypackage.getjavapathcombobox());
outputstream out=new fileoutputstream(configfile);
props.store(out, timehwutil.formatdatetimezh(null));
out.close();//及時關閉資源
cmdutil.hide(configfilepath);//隐藏檔案:attrib ".mqtt_client.properties" +h
system.out.println("save complete.");
}
/***
* 以;;分隔
* @param prop_key
* @param tf
private void setcombox(string prop_key,jtextfield tf,jcombobox<string>combobox){
string rootpath=tf.gettext();
if(valuewidget.isnullorempty(rootpath)){
return;
string roots=props.getproperty(prop_key);
if(valuewidget.isnullorempty(roots)){
roots=rootpath;
}else{
string roots_old[]=roots.split(sharedpicdivision);
if(!systemhwutil.iscontains(roots_old, rootpath)){
roots=roots+sharedpicdivision+rootpath;
combobox.additem(rootpath);
string urls_old2[]=roots.split(sharedpicdivision);
string urls_new[]=systemhwutil.unique(urls_old2);
roots=stringutils.join(urls_new, sharedpicdivision);
props.setproperty(prop_key, roots);
注意:cmdutil.show 是去掉配置檔案的隐藏屬性,因為隐藏檔案不可寫.
(b)視窗關閉時觸發儲存事件
this.addwindowlistener(new windowadapter() {
@override
public void windowclosing(windowevent e) {
system.out.println("closing....");
try {
saveconfig();
} catch (ioexception e1) {
e1.printstacktrace();
guiutil23.errordialog(e1);
}
super.windowclosing(e);
public void windowclosed(windowevent e) {
/*system.out.println("closed");
try {
saveconfig();
} catch (ioexception e1) {
e1.printstacktrace();
}*/
super.windowclosed(e);
});
注意:視窗關閉時隻會執行windowclosing(),而不會執行windowclosed()
(c)增加全局快捷鍵
* 增加全局快捷鍵.<br>
* ctrl+s,導緻"比例"文本框聚焦
protected void setglobalshortcuts() {
// add global shortcuts
toolkit toolkit = toolkit.getdefaulttoolkit();
// 注冊應用程式全局鍵盤事件, 所有的鍵盤事件都會被此事件監聽器處理.
toolkit.addawteventlistener(new java.awt.event.awteventlistener() {
public void eventdispatched(awtevent event) {
if (event.getclass() == keyevent.class) {
keyevent ke = ((keyevent) event);
// 處理按鍵事件 ctrl+s
if (ke.getkeycode() == keyevent.vk_s
&& ke.iscontroldown()&&!ke.isaltdown()
&& ke.getid() == keyevent.key_pressed) {
try {
saveconfig();
} catch (ioexception e) {
e.printstacktrace();
guiutil23.errordialog(e);
}
}
}
}, java.awt.awtevent.key_event_mask);
注意:為什麼要加上條件 ke.getid() == keyevent.key_pressed,根本原因是為了防止觸發兩次
(d)啟動程式時,先讀取配置檔案
* 讀取配置檔案
* @throws ioexception
private void readconfig() throws ioexception{
if(configfile.exists()){
inputstream instream=new fileinputstream(configfile);
props.load(instream);
instream.close();//及時關閉資源
string old_path=getpropvalue(prop_key_old_path);
//"比較檔案夾"
string compared_folderone=getpropvalue(prop_key_compared_folderone);
string compared_folder2=getpropvalue(prop_key_compared_folder2);
//增量包
string root_path=getpropvalue(prop_key_root_paths);
string java_path=getpropvalue(prop_key_java_file_paths);
//比較二進制檔案
string sourcefile=getpropvalue(prop_key_source_file);
string targetfile=getpropvalue(prop_key_target_file);
string issurestr=getpropvalue(prop_key_copy_java_sure);
string iscopypath=getpropvalue(prop_key_is_copy_path);
oldpathtf.settext(old_path);
if(!valuewidget.isnullorempty(root_path)){
string roots[]=root_path.split(sharedpicdivision);
componentutil.fillcombobox(createfolderbypackage.getrootpathcombobox(), roots);
if(!valuewidget.isnullorempty(java_path)){
string java_paths[]=java_path.split(sharedpicdivision);
componentutil.fillcombobox(createfolderbypackage.getjavapathcombobox(), java_paths);
if(!valuewidget.isnullorempty(compared_folderone)){
comparefolderpanel.getfolderonetextfield().settext(compared_folderone);;
if(!valuewidget.isnullorempty(compared_folder2)){
comparefolderpanel.getfolder2textfield().settext(compared_folder2);;
checksamepanel.getsourcefiletf().settext(sourcefile);
checksamepanel.gettargetfiletf().settext(targetfile);
if(!valuewidget.isnullorempty(issurestr)){
boolean issure2=boolean.parseboolean(issurestr);
createfolderbypackage.getsurecheckbox().setselected(issure2);
if(!valuewidget.isnullorempty(iscopypath)){
boolean iscopypath2=boolean.parseboolean(iscopypath);
copycheckbox.setselected(iscopypath2);
上述代碼中的一些變量聲明:
private properties props=new properties();
/***
* path tools
public static final string prop_key_old_path="old_path";
* 比較檔案夾
public static final string prop_key_compared_folderone="compared_folderone";
public static final string prop_key_compared_folder2="compared_folder2";
* 增量包
public static final string prop_key_root_paths="root_paths";
/**
* 增量包的"class檔案"
public static final string prop_key_java_file_paths="java_paths";
* 比較二進制檔案
public static final string prop_key_source_file="sourcefile";
public static final string prop_key_target_file="targetfile";
* 增量包中複制class時是否彈出确認提示框
public static final string prop_key_copy_java_sure="issure";
* 是否複制路徑
public static final string prop_key_is_copy_path="iscopypath";
public static final string sharedpicdivision=";;";
注意:
(1)window中隐藏檔案是隻讀的,不可寫
(2)對于下拉框,多個路徑之間使用兩個分号進行分割
配置檔案範例: