9、Servlet开发：安全与部署全解析

Servlet开发：安全与部署全解析

1. 留言簿Servlet示例

首先来看一个留言簿Servlet的示例代码：

/** Name des Eintragenden */
protected String myName;
/** E-Mail-Adresse des Eintragenden */
protected String myEmail;
/** Kommentar */
protected String myComment;
/** Erstellungsdatum */
protected Date myCreationDate;
/** No-Arg-Konstruktor */
public GuestbookEntry() {}
public GuestbookEntry(String name, String email, String comment) {
   if (name == null) throw new IllegalArgumentException();
   myName = name;
   if (email == null) throw new IllegalArgumentException();
   if (email.indexOf("@") == -1)  throw new IllegalArgumentException();
   myEmail = email;
   if (comment == null) throw new IllegalArgumentException();
   myComment = comment;
   myCreationDate = n