java中cookie类

CookieStore 是 Java API 中用来处理 HTTP 客户端的 Cookie 存储策略的类。

import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.CookieHandler;

import java.net.CookieManager;

import java.net.CookiePolicy;

import java.net.CookieStore;

import java.net.HttpCookie;

import java.net.URI;

import java.net.URL;

import java.net.URLConnection;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Set;

public class WebClient {

public static void main(String[] args) throws Exception {

CookieStore store = new MyCookieStore();

CookiePolicy policy = new MyCookiePolicy();

CookieManager handler = new CookieManager(store, policy);

CookieHandler.setDefault(handler);

URL url = new URL("http://localhost:8080/cookieTest.jsp");

URLConnection conn = url.openConnection();

InputStream in = conn.getInputStream();

BufferedReader reader = new BufferedReader(new InputStreamReader(in));

String input;

while ((input = reader.readLine()) != null) {

System.out.println(input);

}

reader.close();

}

}

class MyCookiePolicy implements CookiePolicy {

public boolean shouldAccept(URI uri, HttpCookie cookie) {

// String host = uri.getHost();

// return host.equals("localhost");

return true;

}

}

class MyCookieStore implements CookieStore {

private Map> map = new HashMap>();

public void add(URI uri, HttpCookie cookie) {

List cookies = map.get(uri);

if (cookies == null) {

cookies = new ArrayList();

map.put(uri, cookies);

}

cookies.add(cookie);

}

public List get(URI uri) {

List cookies = map.get(uri);

if (cookies == null) {

cookies = new ArrayList();

map.put(uri, cookies);

}

return cookies;

}

public List getCookies() {

Collection> values = map.values();

List result = new ArrayList();

for (List value : values) {

result.addAll(value);

}

return result;

}

public List getURIs() {

Set keys = map.keySet();

return new ArrayList(keys);

}

public boolean remove(URI uri, HttpCookie cookie) {

List cookies = map.get(uri);

if (cookies == null) {

return false;

}

return cookies.remove(cookie);

}

public boolean removeAll() {

map.clear();

return true;

}

}

cookieTest.jsp

Cookie cookie = new Cookie ("username", "guest");

cookie.setMaxAge (100);

response.addCookie (cookie);

%>

Add cookie. Cookie name =