struts2--Custom Frame! Mini version

feel this custom frame really crazy ... Followed once again, oneself again 1 times, altogether looked 5 times, now put out for the reference--, but also gives oneself later to see

The following is the approximate process, do very simple bags, interceptors are not

Filter    , parse configuration file (map user request to action),  
set user-submitted data to action---   process result set

1. Import Struts2core Package +dom4j package (used to read XML configuration file)

Commons-fileupload-1.3.2.jar
commons-io-2.4.jar
commons-lang3-3.4.jar
Dom4j-1.6.1.jar
Freemarker-2.3.23.jar
javassist-3.20.0-ga.jar
log4j-api-2.7.jar
Ognl-3.1.12.jar
Struts2-core-2.5.8.jar

2. Create the framework (custom). XML configuration File

<?xml version= "1.0" encoding= "UTF-8"?>

<framework>
    <action name= "Hello" class= " Com.action.HelloAction ">
        <result>/index.jsp</result>
    </action>

    <action Name = "Login" class= "com.action.LoginAction" >
        <result>/success.jsp</result>
        <result name= " Login >/login.jsp</result>
    </action>
</framework>

3. Create Com.core Package (Action, Result, Actionmapper Class)

1, Action.java

public class Action {//property declaration private String name;
    Private String Classurl; Private String method= "execute";//default property//Here use Map to install result set private map<string, result> resultmap=new HashMap

    <String,Result> ();
        Construction method Public action () {} public action (string name, String classurl) {super ();
        THIS.name = name;
    This.classurl = Classurl;
        Public Action (string name, String Classurl, String method) {super ();
        THIS.name = name;
        This.classurl = Classurl;
    This.method = method;
    }//get, set method public String GetName () {return name;
    } public void SetName (String name) {this.name = name;
    } public String Getclassurl () {return classurl;
    } public void Setclassurl (String classurl) {this.classurl = Classurl;
    } public String GetMethod () {return method;
     } public void Setmethod (String method) {   This.method = method;
    } public map<string, Result> Getresultmap () {return resultmap;
    } public void Setresultmap (map<string, result> resultmap) {this.resultmap = Resultmap;
 }
}

2, Result.java

public class Result {//property declaration private String Name= "success";

    private string Type= "dispatcher";//default property private string location;
        Construction method Public result () {} public result (String location) {super ();
    this.location = location;
        Public Result (String type, string location) {super ();
        This.type = type;
    this.location = location;
        Public Result (string name, String type, string location) {this.name = name;
        This.type = type;
    this.location = location;
    }//get, set method public String GetName () {return name;
    } public void SetName (String name) {this.name = name;
    } public String GetType () {return type;
    The public void SetType (String type) {this.type = type;
    } public String GetLocation () {return location;
    } public void setlocation (String location) {this.location = location;
 }
}

3, Actionmapper.java (read the file here with dom4j)

public class Actionmapper {//action container public static map<string, action> actionmap=new Hashmap<string,ac

    Tion> (); Parse profile public static void Parser () throws documentexception{//Read configuration file Framework.xml InputStream input
        Stream=actionmapper.class.getclassloader (). getResourceAsStream ("Framework.xml");
        Document document=new Saxreader (). read (InputStream);
        Gets the root element object of an element root=document.getrootelement ();
        System.out.println (Root.getname ());
        Gets the Action object list<element> listaction=root.elements ();
            for (Element itemaction:listaction) {Action action=new action ();
            Gets the Action property Action.setname (Itemaction.attributevalue ("name"));
            Action.setclassurl (Itemaction.attributevalue ("class"));
            String Method=itemaction.attributevalue ("method");
            if (method!=null) {Action.setmethod (method); }
            //Get Result object list<element> listresult=itemaction.elements ();
                for (Element itemresult:listresult) {result result=new result ();
                Gets the result property of String Nameresult=itemresult.attributevalue ("name");
                if (nameresult!=null) {result.setname (Nameresult);
                } String Typeresult=itemresult.attributevalue ("type");
                if (typeresult!=null) {result.settype (Typeresult);
                } result.setlocation (Itemresult.getstringvalue ());
            Adds a result object to the Action object Action.getresultmap (). Put (Result.getname (), result);
        }//Add the Action object to the ActionMap object Actionmap.put (Action.getname (), action);
 }
    }
}

4, create Com.filter package (Corefilter Class)
1, Corefilter.java (here is the key core, it's hard to fathom t.t)

public class Corefilter implements filter{@Override public void Destroy () {//TODO auto-generated method stub} @Override public void init (Filterconfig arg0) throws Servletexception {try {//parse config file is placed here (this method only

        Line once) Actionmapper.parser ();
        } catch (Documentexception e) {//TODO auto-generated catch block E.printstacktrace (); }}//Processing transactions are in DoFilter @Override public void DoFilter (ServletRequest request, servletresponse response, Fi Lterchain Filterchain) throws IOException, servletexception {httpservletrequest httprequst= (HttpServ
        letrequest) Request;
        HttpServletResponse httpresponse= (httpservletresponse) response;
        I blindly set the transcoding, currently can only pass the regular string httprequst.setcharacterencoding ("Utf-8");

Httpresponse.setcharacterencoding ("Utf-8");
        The following 5 steps are divided into separate methods to eat//1, map the request to Action action targetaction=reqtoaction (Httprequst); if (targetaction==null{//Skip Filterchain.dofilter (Request, response) if it is not an action request;
        return;
        }//system.out.println (Targetaction.getname () + "---" +targetaction.getclass ());
            try {//2, create action Object proxyaction=createproxyaction (Targetaction.getclassurl ());//3, set user-submitted property to action
SetProperty (Httprequst, proxyaction);
4. Execute Action String Resultname=execute (Proxyaction,targetaction.getmethod ());
            5, processing result result Result=targetaction.getresultmap (). get (Resultname);
        Resultexecute (httprequst,httpresponse,result,proxyaction);
        } catch (Exception e) {//TODO auto-generated catch block E.printstacktrace ();
        }}//Map request to Action Public action reqtoaction (HttpServletRequest HttpRequest) {//Get URL delivery request name
        String Path=httprequest.getrequesturi ();
            if (!path.endswith (". Action")) {//tests whether this string ends with the specified suffix.
        return null;
     }   System.out.println (Path.tostring ()); String reqname=path.substring (Path.lastindexof ("/") +1,path.lastindexof ("."));
        /Intercept Request name//SYSTEM.OUT.PRINTLN (reqname);
    Return ActionMapper.actionMap.get (Reqname); }//Create action public Object createproxyaction (String className) throws Exception {Class Clzz=class.forname
        (ClassName);
    return Clzz.newinstance ();
        }//Set user-submitted property to action on public void SetProperty (HttpServletRequest httprequst,object action) throws Exception {
        Create a Class class Clzz=action.getclass ();
        Map Parametermap=httprequst.getparametermap (); for (Iterator Iterator = Parametermap.keyset (). Iterator (); Iterator.hasnext ();)
            {Object key=iterator.next (); Find Field field Field=clzz.getdeclaredfield (Key.tostring ()) According to the submission parameters;//Returns the object of the specified field in this class if (Field==null)
            {continue;
            } field.setaccessible (True); Field.set(Action, Httprequst.getparameter (Key.tostring ()));
        System.out.println (key+ "-----" +httprequst.getparameter (key.tostring ())); }}//execute action Private String execute (Object proxyaction, String methodName) throws exception{Class
        Clzz=proxyaction.getclass ();
        Method Method=clzz.getdeclaredmethod (methodName);
    Return (String) Method.invoke (proxyaction); }//Processing result private void Resultexecute (HttpServletRequest httprequst, httpservletresponse httpresponse, result re Sult, Object proxyaction) throws Exception {if (Result.gettype () equals ("redirect")) {HT
            Tpresponse.sendredirect (Result.getlocation ());
        Return
        }//Set the action's property value to Httprequst's attribute Class clzz=proxyaction.getclass ();
        Field[] Fields=clzz.getdeclaredfields ();
            for (Field field:fields) {field.setaccessible (true); Httprequst.setattribute (Field.getname (), FIeld.get (proxyaction));
        Field.setaccessible (FALSE);
    } httprequst.getrequestdispatcher (Result.getlocation ()). Forward (Httprequst, HttpResponse);
 }
}

JSP page
1, login.jsp

    <form action= "Login.action" method= "POST" >
        account <input type= "text" name= "name" ><br>
        Password < Input type= "text" name= "pwd" ><br>
        <input type= "Submit" value= "Login" ><br>
    </form>

2, success.jsp

    
 
test Case Loginaction.java

public class Loginaction extends Actionsupport {

    private String name;
    Private String pwd;

    @Override public
    String execute () throws Exception {
        if (name.equals ("admin") &&pwd.equals ("000") {
            return SUCCESS;
        }
        return LOGIN;
    }

    Public String GetName () {
        return name;
    }

    public void SetName (String name) {
        this.name = name;
    }

    Public String getpwd () {
        return pwd;
    }

    public void SetPwd (String pwd) {
        this.pwd = pwd;
    }
}
 
Effect Diagram


That's about it, stuts2.