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我需要通過Java反射api實例化幾個類,並在實例化的類中調用'a'方法(方法調用不是通過反射)。我知道反射確實影響了應用程序的性能,但我不太確定它在網絡環境中的效果如何!與使用反射實例化Action類的Struts框架一樣,我的框架也獲得了文件中配置的字符串的類名,我在不同的請求中讀取並實例化了該字符串。對於每個類只有一個實例併爲每個請求調用其方法的想法如何? 示例,在Web環境中通過反射實例化對象
package com.app.events;
public class event1 implements iEvent {
public event1() {
}
public void doprocess(Object info) {
// do necessary events
}
}
package com.app.events;
public class event2 implements iEvent {
public event1() {
}
public void doprocess(Object info) {
// do necessary events
}
}
config.xml
<events>
<event>com.app.events.Event2</event>
<event>com.app.events.Event1</event>
</events>
// servlet init
String clazName = parseXMLFile(); // not every time but only once, I have the bean
Class claz = Class.forName(clazName);
// how about this?
// I save this instance for later requests
events.put(request.getParameter("event"), claz.newInstance());
// later requests,I retrieve the event from the map and invoke its method,
// just a rough code...
events.get(request.getParameter("event")).doprocess(info);