Cookie Test

简单实例：

packagecom.nothing2012.servlet.cookie;

importjava.io.IOException;
importjava.io.PrintWriter;

importjavax.servlet.RequestDispatcher;
importjavax.servlet.ServletException;
importjavax.servlet.http.Cookie;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;

/**
*ServletimplementationclassSaveCookie
*/
publicclassSaveCookieextendsHttpServlet{
privatestaticfinallongserialVersionUID=1L;

/**
*@seeHttpServlet#HttpServlet()
*/
publicSaveCookie(){
super();
//TODOAuto-generatedconstructorstub
}

/**
*@seeHttpServlet#doGet(HttpServletRequestrequest,HttpServletResponseresponse)
*/
protectedvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{
//TODOAuto-generatedmethodstub
doPost(request,response);
}

/**
*@seeHttpServlet#doPost(HttpServletRequestrequest,HttpServletResponseresponse)
*/
@SuppressWarnings("unused")
protectedvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{
//TODOAuto-generatedmethodstub
response.setContentType("text/html;charset=UTF-8");
PrintWriterout=response.getWriter();
CookietempCookie=newCookie("temp","87654321");
tempCookie.setMaxAge(-1);
response.addCookie(tempCookie);

Cookiecookie=newCookie("cookie","666");
cookie.setMaxAge(0);
response.addCookie(cookie);

Stringuser=request.getParameter("user");
if(user!=null){
CookieuserCookie=newCookie("user",user);
userCookie.setMaxAge(60*1*1);
response.addCookie(userCookie);
}


System.out.println("=========writecookieend=========");
RequestDispatcherreadCookie=getServletContext().getRequestDispatcher("/readCookie");
readCookie.include(request,response);

}

}

packagecom.nothing2012.servlet.cookie;

importjava.io.ByteArrayInputStream;
importjava.io.IOException;
importjava.io.ObjectInputStream;
importjava.io.PrintWriter;

importjavax.servlet.ServletException;
importjavax.servlet.http.Cookie;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;

/**
*ServletimplementationclassreadCookie
*/
publicclassReadCookieextendsHttpServlet{
privatestaticfinallongserialVersionUID=1L;

/**
*@seeHttpServlet#HttpServlet()
*/
publicReadCookie(){
super();
//TODOAuto-generatedconstructorstub
}
protectedCookiegetCookie(Cookie[]cookies,Stringname){
if(cookies!=null){
for(Cookiec:cookies){
if(c.getName().equals(name)){
returnc;
}
}
}
returnnull;
}
/**
*@seeHttpServlet#doGet(HttpServletRequestrequest,HttpServletResponseresponse)
*/
protectedvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{
//TODOAuto-generatedmethodstub
doPost(request,response);
}

/**
*@seeHttpServlet#doPost(HttpServletRequestrequest,HttpServletResponseresponse)
*/
protectedvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{
//TODOAuto-generatedmethodstub
response.setContentType("text/html;charset=UTF-8");
PrintWriterout=response.getWriter();
System.out.println("========beginreadcookie===========");
CookietempCookie=getCookie(request.getCookies(),"temp");
if(tempCookie!=null){
out.println("临时cookie值："+tempCookie.getValue()+"<br/>");
}else
out.println("cookie已经被删除<br/>");

Cookiecookie=getCookie(request.getCookies(),"cookie");
if(cookie!=null){
out.println("cookie:"+cookie.getValue()+"<br>");
}else
out.println("这个cookie永远不可能获得<br>");

CookieuserC=getCookie(request.getCookies(),"user");
if(userC!=null){
out.println("user="+userC.getValue());
}else
out.println("user未创建");


}

}

package com.nothing2012.servlet.cookie;

@SuppressWarnings("serial")
public class MyCookie implements java.io.Serializable{
public String getMsg(){
return "222";
}
}

读取复杂对象：

publicclassSaveComplexCookieextendsHttpServlet
{
@Override
protectedvoidservice(HttpServletRequestrequest,
HttpServletResponseresponse)throwsServletException,IOException
{
//创建一个用于进行Base64编码的BASE64Encoder对象
sun.misc.BASE64Encoderbase64Encoder=newsun.misc.BASE64Encoder();
//创建一个用于接收被序列化的对象实例字节流的ByteArrayOutputStream对象
ByteArrayOutputStreamclassBytes=newByteArrayOutputStream();
//创建一个用于向流中写入对象的ObjectOutputStream对象
ObjectOutputStreamoos=newObjectOutputStream(classBytes);
oos.writeObject(newMyCookie());//写入MyCookie对象实例
oos.close();//关闭ObjectOutputStream对象
//将被序列化的对象实例的字节流按Base64编码格式进行编码
StringclassStr=base64Encoder.encode(classBytes.toByteArray());
Cookiecookie=newCookie("mycookie",classStr);//将Base64编码写入Cookie
cookie.setMaxAge(60*60*24);//Cookie的超时时间为1天
response.addCookie(cookie);
response.setContentType("text/html;charset=utf-8");
PrintWriterout=response.getWriter();
out.println("MyCookie的对象实例已写入Cookie");//输出提示消息
}
}

publicclassReadComplexCookieextendsReadCookie
{

@Override
publicvoidservice(HttpServletRequestrequest,
HttpServletResponseresponse)throwsServletException,IOException
{
try
{
sun.misc.BASE64Decoderbase64Decoder=newsun.misc.BASE64Decoder();
Cookiecookie=getCookie(request.getCookies(),"mycookie");
if(cookie==null){
System.out.println("----------------");
return;
}
System.out.println("cookie更新不");
StringclassStr=cookie.getValue();
System.out.println(classStr);
byte[]classBytes=base64Decoder.decodeBuffer(classStr);
ObjectInputStreamois=newObjectInputStream(
newByteArrayInputStream(classBytes));
MyCookiemyCookie=(MyCookie)ois.readObject();
response.setContentType("text/html;charset=utf-8");
PrintWriterout=response.getWriter();
out.println(myCookie.getMsg());
System.out.println("========"+myCookie.getMsg());

}
catch(Exceptione)
{
e.printStackTrace();
}
}

}

后者测试未通过：报java.io.EOFException