ray

    HttpSessionAttributeListener 和 HttpSessionListener   1. HttpSessionAttributeListener 当session里的属性发生Add,Removed,Replaced时,tomcat会自动调用相应方法   2. HttpSessionListener 当session被create 和 Destroyed时...

  JDK动态代理   public class LogHandler implements InvocationHandler {  private Object targetObject;  public Object newProxyInstance(Object targetObject) {  this.targetObject = targetObject;  return Pr...

  javascript对xml的解析     function selectProv(field) { var xmlHttp = null; //表示当前浏览器不是ie,如ns,firefox if(window.XMLHttpRequest) {  xmlHttp = new XMLHttpRequest(); } else if (window.ActiveXObject) {  ...