Custom-Extend the Struts2 label

Recently in doing Java EE project, need to encapsulate a lot of tags, found directly from the Bodytagsupport inherited words, can't get valuestack, also can't borrow struts internationalization solution. So you need to extend the label of struts.

See a lot of online extension methods, feel can only be used as a reference or example, but it is not practical. Simply have to use Componenttagsupport to do a package.

Here are some introductions about Componenttagsupport:

When implementing a custom label in struts2.x, the 2 classes inherited are Org.apache.struts2.views.jsp.ComponentTagSupport and Org.apache.struts2.components.Component. Componenttagsupport: is actually an encapsulation of bodytagsupport, inheriting componenttags The Upport class is designed to get the property values set in the user-defined tags in the JSP page and wrap them as component objects. Component:
The component class is inherited to obtain the corresponding value from the Valuestack in the Struts2. The following gives me the source code structure, I will not say. A friend who needs it naturally understands.

Package Com.jdgm.platform.common.tag;
Import Java.io.Writer;
Import java.util.ArrayList;
Import java.util.List;
Import Java.util.Locale;

Import Java.util.ResourceBundle;
Import Javax.servlet.http.HttpServletRequest;
Import Javax.servlet.http.HttpServletResponse;

Import javax.servlet.jsp.JspException;
Import Org.apache.commons.beanutils.PropertyUtils;
Import Org.apache.commons.io.IOUtils;
Import Org.apache.commons.lang.StringUtils;
Import org.apache.struts2.components.Component;

Import Org.apache.struts2.views.jsp.ComponentTagSupport;
Import Com.jdgm.framework.utils.BeanUtils;
Import Com.jdgm.framework.utils.ResourceUtil;
Import Com.jdgm.framework.utils.Utils;
Import Com.jdgm.platform.ConstantsPF;
Import Com.jdgm.platform.components.log.LogUtil;
Import Com.opensymphony.xwork2.util.LocalizedTextUtil;


Import Com.opensymphony.xwork2.util.ValueStack; The/** * * Struts tab extension inherits from here * compared to the expansion from Bodytagsupport, it has the following advantages: * 1 Internationalization Solution: Commonstrutstag subclasses can enjoy the same international solution * 2) value as Struts's own label Stack: commonstrutsTag's subclass, you can get valuestack instances, but also through the class properties <valueproperty> * To do with the action of the corresponding properties of two-way binding, that is, value submission and value fill < specific See the description of the property Valueproperty > * * * @author ZHANGPF * */Public abstract class Commonstrutstag extends Componenttagsupport {/** * website's ur
	 L Address, System assigned value.
	
	* * protected String CTX;

	protected String ID;
	
	protected String templatefile;
	
	protected String Showdiv;
	Public String Getshowdiv () {return showdiv;
	} public void Setshowdiv (String showdiv) {this.showdiv = Showdiv;
	/** * All Attributes list * * * protected list<string> propertys = new arraylist<string> ();
		{Propertys.add ("CTX");
		Propertys.add ("id");

	Propertys.add ("Showdiv");

	/** * A set of attributes that require special handling in the word/protected list<string> Specproperty = new arraylist<string> ();
	
	/** * URL-related attributes */protected list<string> Urlproperty = new arraylist<string> ();  /** * Related properties that require value from Valuestack <br/> * For example: The control has a property: Titlefield, the value is "Model.title" <br/> * Corresponding Control source code is:< input NamE= "%{titlefield}"/> <br/> * This completes the one-way binding with the attribute Model.title in action, that is, when submitting a form <br/> * The value of input is automatically populated with the corresponding attribute in the action. However, it is not possible to populate the input control with the value <br/> * of the property in the action. To do this, you can modify the control source code for:<br/> * < input name= "%{titlefield}" value= "%{title}"/><br/> * Meanwhile, in the tag subclass, define a property t Itle and add it to valueproperty,<br/> * then in init (), assign the title to: "Model.title", which completes the reverse binding of the Action property value to the input control <br/ > * that is, when the JSP page is opened via an action address, if the action Model.title is not empty, the value of the property is automatically assigned to the control <br/>/protected list<string> ValuePRO
	
	
	
	Perty = new arraylist<string> ();
		@Override public Component Getbean (Valuestack arg0, HttpServletRequest arg1, HttpServletResponse arg2) {init ();
		
		Commonstrutscomponent cmp=new commonstrutscomponent (arg0);
	return CMP;
		  
		  } @Override protected void Populateparams () {super.populateparams ();
		  Commonstrutscomponent cmp= (commonstrutscomponent) component;
	Cmp.sethtmlcontent (ToHTML ()); /** * This method is used to preprocess each property in the label before the label is constructed * main convenient subclassExtended */protected void init () {} final protected String ToHTML () {ctx=constantspf.url_website; try {StringBuilder string = new StringBuilder (ioutils.tostring (CommonTag.class.getResourceAsStream (templatefile)
			
			, "UTF-8")); for (String pro:propertys) {if (Specproperty.contains (PRO) | | Valueproperty.contains (PRO) | |
				
				Urlproperty.contains (PRO)) continue;
				String regex = "%{" + Pro + "}";
					while (String.IndexOf (regex)!=-1) {int index = String.IndexOf (regex);
					String Provalue = string.valueof (Propertyutils.getproperty (This,pro));
						
					if (Stringutils.isnotblank (Provalue)) {string.replace (index, index + regex.length (), provalue);
						else {provalue = "";
					String.Replace (index, index + regex.length (), provalue);
			}} dealurlproperty (String);
			Dealvalueproperty (string);
			Dealspecproperty (string);	

		return string.tostring ();
		catch (Exception e) {	Logutil.error ("Build control Failed", e);
	 Return ""; /** * URL-related processing * @param string * @throws Exception/protected void Dealurlproperty (Strin
 			
			Gbuilder string) throws Exception {for (string pro:urlproperty) {string regex = "%{" + Pro + "}";
				while (String.IndexOf (regex)!=-1) {int index = String.IndexOf (regex);
				String Provalue = string.valueof (Propertyutils.getproperty (This,pro));
					if (Stringutils.isnotblank (Provalue)) {Provalue = ctx + provalue;
	
				String.Replace (index, index + regex.length (), provalue);
					else {provalue = "";
				String.Replace (index, index + regex.length (), provalue);  {}}}/** * related properties requiring value from Valuestack/protected void Dealvalueproperty (StringBuilder string) throws
			Exception {for (string pro:valueproperty) {string regex = "%{" + Pro + "}";
				while (String.IndexOf (regex)!=-1) {int index = String.IndexOf (regex); StRing field = string.valueof (Propertyutils.getproperty (This,pro));
					if (Stringutils.isnotblank (field)) {String fieldvalue=this.getstack (). findstring (field);
						if (fieldvalue==null) fieldvalue= "";
				String.Replace (index, index + regex.length (), fieldvalue);
				else {string.replace (index, index + regex.length (), ""); 
		
	/** * Handles special properties, primarily for subclass extensions/protected void Dealspecproperty (StringBuilder string) throws exception{
	Public String GetId () {return id;
	public void SetId (String id) {this.id = ID;
	Public String Getctx () {return ctx;
	} public void Setctx (String ctx1) {ctx = ctx1;

	} class Commonstrutscomponent extends Component {private String htmlcontent;
	Public String gethtmlcontent () {return htmlcontent;
	} public void Sethtmlcontent (String htmlcontent) {this.htmlcontent = htmlcontent;
		
	Public commonstrutscomponent (Valuestack stack) {super (stack); } public BoOlean Start (Writer Writer) {Boolean result = Super.start (Writer);
		 try {writer.write (htmlcontent);
	    catch (Exception ex) {ex.printstacktrace ();
	return result; }
}

For the above Commonstrutstag class to use, the following gives a simple example, after looking, you will feel because Commonstrutstag, write the custom label, very simple, seconds of things. Ha ha

Demotag.java

Package Com.jdgm.platform.common.tag;
Import Java.util.Locale;

Import Java.util.ResourceBundle;
Import Javax.servlet.http.HttpServletRequest;
Import Javax.servlet.http.HttpServletResponse;

Import javax.servlet.jsp.JspException;
Import Org.apache.commons.beanutils.PropertyUtils;
Import Org.apache.commons.lang.StringUtils;
Import org.apache.struts2.components.Component;

Import Org.apache.struts2.views.jsp.ComponentTagSupport;
Import Com.jdgm.framework.utils.BeanUtils;
Import Com.jdgm.framework.utils.ResourceUtil;
Import Com.jdgm.framework.utils.Utils;
Import Com.opensymphony.xwork2.util.LocalizedTextUtil;


Import Com.opensymphony.xwork2.util.ValueStack; /** * * Tab CONTROL * @author ZHANGPF */public class Demotag extends Commonstrutstag {{templatefile= ' Demotag.
	TXT ";
		} {propertys.add ("field");
		
	Valueproperty.add ("value");
	Private String field;
	private String value;
	Public String GetField () {return field; public void SetField (String field) {thIs.field = field;
	Public String GetValue () {return value;
	public void SetValue (String value) {this.value = value;
 }

}

Demotag.txt:

<input type= "text" Name= "%{field}" value= "%{value}"  />