ajax and js Quest Analog java implementation

May 13 posted in AJAX (RSS), comments.

Ajax in the U.S. has not used mock consider how easy the ajax request object XmlHttp the HA!

Ha ha, ha us to simulate, it is the original teacher training to make students write the code, and now allow others to criticize U.S. Ha!

Do not know how to say, or download code to see everyone, the implementation of it ha!

js version: ie directly to the Executive:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=GBK">
</head>
<body>

</body>
<script>
    function XmlHttp() {
        this.readyState = 0;
        this.serverStatus = -1;

    }
    XmlHttp.prototype.onreadyStatechange = function() {
    };
    XmlHttp.prototype.open = function(method, url, asynchronous) {
        while (true) {
            var vNum = Math.random();
            vNum = Math.round(vNum * 2);
            var senType = " Asynchronous  ";
            if (!asynchronous) {
                senType = " Synchronization  ";
            }
            alert(senType + " The way to the server  " + url + "  " + method + " Request  ");
            if (vNum == 0) {
                this.serverStatus = 500;
                this.onreadyStatechange()
                break;
            }
            if (vNum == 1) {
                this.serverStatus = 404;
                this.onreadyStatechange()
                break;
            }
            if (vNum == 2) {
                this.serverStatus = 200;
                this.onreadyStatechange()
                break;
            }
        }
    };


    var myXmlHttp = new XmlHttp();
    myXmlHttp.onreadyStatechange = myCallBack;
    myXmlHttp.open('get', "www.163.com", true);
    function myCallBack() {
        if (myXmlHttp.serverStatus == 500) {
            alert('errcode=500  The server is unavailable  ');
        }
        if (myXmlHttp.serverStatus == 404) {
            alert('errcode=404 URL Resource does not exist  ');
        }
        if (myXmlHttp.serverStatus == 200) {
            alert('return success');
        }
    }
</script>
</html>

java Version  :

 Core classes describes  :

/*annoation Used to mark the client's callback method  */

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface AjaxCallBack {
}

/* The callback implementation class  */

package com.bobo.mockajaxcallback.r5;

import java.lang.reflect.Method;

/**
 * Created by IntelliJ IDEA.
 * User: xingbo.xu
 * Date: 2007-11-10
 * Time: 19:28:57
 * QQ Group  :77082582
 */
public class CallBackClient implements Runnable {
    private String onreadyStateChage;

    public CallBackClient(String onreadyStateChage) {
        this.onreadyStateChage = onreadyStateChage;
    }

    public void run() {
        doClientMethod();
    }

    private void doClientMethod() {
        //   String classPath = onreadyStateChage.substring(0, onreadyStateChage.indexOf("|"));
        //      String methodName = onreadyStateChage.substring(onreadyStateChage.indexOf("|") + 1);
        //  System.out.println(classPath);
        //  System.out.println(methodName);
        String classPath = onreadyStateChage;
        try {
            Class clazz = Class.forName(classPath);
            Method[] methods = clazz.getDeclaredMethods();
            Method ajaxCallBckMethod = null;
            for (Method method : methods) {
                if (method.isAnnotationPresent(AjaxCallBack.class)) {
                    ajaxCallBckMethod = method;
                }
            }
            if (ajaxCallBckMethod != null) {
                ajaxCallBckMethod.invoke(clazz.newInstance());
            } else {
                System.out.println("The class -->" + onreadyStateChage + " no @AjaxCallBack");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

/*mock ajax core object */

package com.bobo.mockajaxcallback.r5;



/**
 * Created by IntelliJ IDEA.
 * User: xingbo.xu
 * Date: 2007-11-10
 * Time: 19:28:57
 * QQ Group  :77082582
 */
public class XMLHttpRequest {
    /**
     *  Callback pointer  
     */
    public String onreadyStateChage;
    public int readyState;
    public int status;
    public String responseTest;
    public CallBackClient client;
    private boolean asynchronous;

    private XMLHttpRequest() {
    }

    public static XMLHttpRequest createXMLHttpRequest() {
        return new XMLHttpRequest();
    }

    /**
     * @param method       get or post
     * @param url
     * @param asynchronous true
     */

    public void open(String method, String url, boolean asynchronous) {
        this.asynchronous = asynchronous;


        sleep(2000);
        if (onreadyStateChage == null || onreadyStateChage.length() < 1) {
            setReadyState(0);
            System.out.println(" Not initialized  ");
            return;
        }


        setReadyState(1);
        sleep(2000);
        System.out.println(" Loading  ");

        setReadyState(2);
        sleep(2000);
        System.out.println(" Loaded  ");

        setReadyState(3);
        sleep(2000);
        System.out.println(" Interaction  ");

        sleep(2000);
        responseTest = "hello Ajax";
        status = 200;
        setReadyState(4);
        System.out.println(" Complete  ");
        if (!asynchronous) {
            doClient();
        }

    }


    public void setReadyState(int readyState) {
        //    System.out.println("setReadyState");
        this.readyState = readyState;
        if (asynchronous) {
            doClient();
        }
    }

    private void doClient() {
        if (client == null)
            client = new CallBackClient(onreadyStateChage);

        Thread t = new Thread(client);
        t.start();
    }

    private  void sleep(int mSecond) {
        try {
            Thread.currentThread().sleep(mSecond);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

/* The client test class  */

package com.bobo.mockajaxcallback.r5;


/**
 * Created by IntelliJ IDEA.
 * User: xingbo.xu
 * Date: 2007-11-10
 * Time: 19:28:57
 * QQ Group  :77082582
 */
public class Client {
    static XMLHttpRequest xmlHttpRequest;

    public static void main(String[] args) {
        xmlHttpRequest = XMLHttpRequest.createXMLHttpRequest();

        xmlHttpRequest.onreadyStateChage = "com.bobo.mockajaxcallback.r5.Client";
        xmlHttpRequest.open("", "", true);
        System.out.println("-----------");
        xmlHttpRequest.open("", "", false);

    }

    @AjaxCallBack
    public  void clientMethod() {
        //   System.out.println("clientMethod");
        if (xmlHttpRequest.readyState == 0) {
            System.out.println("client 0");
        }
        if (xmlHttpRequest.readyState == 1) {
            System.out.println("client 1");
        }
        if (xmlHttpRequest.readyState == 2) {
            System.out.println("client 2");
        }
        if (xmlHttpRequest.readyState == 3) {
            System.out.println("client 3");
        }
        if (xmlHttpRequest.readyState == 4 && xmlHttpRequest.status == 200) {
            System.out.println(xmlHttpRequest.responseTest);
        }


    }
}