怎么同步两个不同域之间的Cookie值
我想利用多线程在DetailServlet中利用post方法发送HttpPost httpPost = new HttpPost(server + "/" + method + "?cookies=" + cookies);
到BrowseServlet中设置拦截/browse/setCookie.do但是发现BrowseServlet中接收不到，怎么解决这个问题呢？
Cookie在detail.jsp中的显示
在browse_list.jsp中的显示
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <!--欢迎页面--> <welcome-file-list> <welcome-file>/index.jsp</welcome-file> </welcome-file-list> <!--过滤器--> <filter> <filter-name>CharsetFilter</filter-name> <filter-class>filter.CharsetFilter</filter-class> <init-param> <param-name>charset</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharsetFilter</filter-name> <url-pattern>*.do</url-pattern> </filter-mapping> <servlet> <servlet-name>ProductServlet</servlet-name> <servlet-class>servlet.ProductServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>ProductServlet</servlet-name> <url-pattern>/product/list.do</url-pattern> </servlet-mapping> <servlet> <servlet-name>CartServlet</servlet-name> <servlet-class>servlet.CartServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>CartServlet</servlet-name> <url-pattern>/cart/cart.do</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>CartServlet</servlet-name> <url-pattern>/cart/decr.do</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>CartServlet</servlet-name> <url-pattern>/cart/incr.do</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>CartServlet</servlet-name> <url-pattern>/cart/delete.do</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>CartServlet</servlet-name> <url-pattern>/cart/list.do</url-pattern> </servlet-mapping> <servlet> <servlet-name>FavoriteServlet</servlet-name> <servlet-class>servlet.FavoriteServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>FavoriteServlet</servlet-name> <url-pattern>/favorite/favorite.do</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>FavoriteServlet</servlet-name> <url-pattern>/favorite/delete.do</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>FavoriteServlet</servlet-name> <url-pattern>/favorite/list.do</url-pattern> </servlet-mapping> <servlet> <servlet-name>DetailServlet</servlet-name> <servlet-class>servlet.DetailServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>DetailServlet</servlet-name> <url-pattern>/detail/detail.do</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>DetailServlet</servlet-name> <url-pattern>/detail/removeCookie.do</url-pattern> </servlet-mapping> <servlet> <servlet-name>BrowseServlet</servlet-name> <servlet-class>servlet.BrowseServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>BrowseServlet</servlet-name> <url-pattern>/browse/list.do</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>BrowseServlet</servlet-name> <url-pattern>/browse/delete.do</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>BrowseServlet</servlet-name> <url-pattern>/browse/setCookie.do</url-pattern> </servlet-mapping> <error-page> <error-code>404</error-code> <location>/WEB-INF/views/error/404.jsp</location> </error-page> <error-page> <error-code>500</error-code> <location>/WEB-INF/views/error/500.jsp</location> </error-page> </web-app>
DetailServlet
public class DetailServlet extends HttpServlet {
//创建java线程池对象，创建10个线程池
private ExecutorService service = Executors.newFixedThreadPool(10);
//实现同步cookie的方法
private void syncCookie(String server, String method, String cookies) {
//调用提交的方法
service.submit(new Runnable() {
@Override
public void run() {
//post请求调用
HttpPost httpPost = new HttpPost(server + "/" + method + "?cookies=" + cookies);
CloseableHttpClient httpClient = null;
CloseableHttpResponse response = null;
try {
httpClient = HttpClients.createDefault();
response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
String responseContent = EntityUtils.toString(entity, "utf-8");
System.out.println("==============" + responseContent);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != response) {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != httpClient) {
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
});
}
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
if (Objects.equals("/detail/detail.do", req.getServletPath())) {
//为list界面传来请求
String productId = req.getParameter("productId");
if (null != productId && !"".equals(productId)) {
//声明一个existCookie
Cookie existCookie = null;
//遍历系统存在的cookie
//从cookie中取出所有数据
for (Cookie cookie : req.getCookies()) {
if (Objects.equals("productIds", cookie.getName())) {
//当cookie与产品id匹配时
existCookie = cookie;
break;
}
}
//当existCookie为空时
if (null == existCookie) {
//新建一个cookie
existCookie = new Cookie("productIds", productId);
//调用同步coookie的方法
syncCookie("/browse", "setCookie.do", productId);
} else {
//把productIds中的productId提取出来
String[] productIds = existCookie.getValue().split("%2C");
if (!"".equals(productIds)) {
/**
* 当productIds不为""字符串时
* 定义一个boolean控制是否添加新的cookie
*/
StringBuilder stringBuilder = new StringBuilder();
Boolean addCookieFlag = false;
//遍历数组
for (String cookieId : productIds) {
//当cookie存在于原有cookies时，为真
Boolean cookieFlag = false;
if (cookieId.equals(productId)) {
//当productId与原有id匹配
cookieFlag = true;
}
//反馈addCookieFlag是否添加新的cookie
addCookieFlag = cookieFlag || addCookieFlag;
}
//根据addCookieFlag来决定是否添加新cookie
if (addCookieFlag) {
//存在即设置为原有cookie
existCookie.setValue(existCookie.getValue());
//调用同步cookie的方法
syncCookie("/browse", "setCookie.do", existCookie.getValue());
} else {
//不存在添加新cookie
for (String cookieId : productIds) {
//把原有id添加到stringBuilder
stringBuilder.append(cookieId + "%2C");
}
//添加新的cookie
stringBuilder.append(productId + "%2C");
//为cookie设置新的值
existCookie.setValue(stringBuilder.toString());
//调用同步cookie的方法
syncCookie("/browse", "setCookie.do", stringBuilder.toString());
}
}
}
//把cookie添加到当前服务器
resp.addCookie(existCookie);
//把id匹配到的产品放到request中
req.setAttribute("product", ProduceService.getProduct(Long.valueOf(productId)));
//转发回详情页面
req.getRequestDispatcher("/WEB-INF/views/biz/detail.jsp").forward(req, resp);
}
} else if (Objects.equals("/detail/removeCookie.do", req.getServletPath())) {
//接收cookie的值
String cookies = req.getParameter("cookies");
//把cookie写入response作用域中
resp.addCookie(new Cookie("productIds", cookies));
resp.setCharacterEncoding("UTF-8");
resp.setContentType("application/text;charset=utf-8");
//写入输出流
PrintWriter out = null;
try {
out = resp.getWriter();
out.write("ok");
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != out) {
out.close();
}
}
}
}
}BrowseServlet
public class BrowseServlet extends HttpServlet {
//创建java线程池对象，创建10个线程池
private ExecutorService service = Executors.newFixedThreadPool(10);
//实现同步cookie的方法
private void syncCookie(String server, String method, String cookies) {
//调用提交的方法
service.submit(new Runnable() {
@Override
public void run() {
//post请求调用
HttpPost httpPost = new HttpPost(server + "/" + method + "?cookies=" + cookies);
CloseableHttpClient httpClient = null;
CloseableHttpResponse response = null;
try {
httpClient = HttpClients.createDefault();
response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
String responseContent = EntityUtils.toString(entity, "utf-8");
System.out.println("==============" + responseContent);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != response) {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != httpClient) {
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
});
}
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
if (Objects.equals("/browse/list.do", req.getServletPath())) {
String cookieProducts = null;
List<Product> productList = new ArrayList<>();
//从cookie中取出所有数据
for (Cookie cookie : req.getCookies()) {
if (Objects.equals("productIds", cookie.getName())) {
//把产品id提取出来
cookieProducts = cookie.getValue();
break;
}
}
if (null != cookieProducts && !"".equals(cookieProducts)) {
//把cookieProducts中的productId提取出来
String[] productIds = cookieProducts.split("%2C");
for (String productId : productIds) {
//调用得到商品的方法
productList.add(ProduceService.getProduct(Long.valueOf(productId)));
}
}
//把productList放进request中
req.setAttribute("products", productList);
//转发回浏览记录页面
req.getRequestDispatcher("/WEB-INF/views/biz/browse_list.jsp").forward(req, resp);
} else if (Objects.equals("/browse/delete.do", req.getServletPath())) {
//为删除浏览记录商品请求
String productId = req.getParameter("productId");
if (null != productId && !"".equals(productId)) {
//从cookie中取出所有数据
for (Cookie cookie : req.getCookies()) {
if (Objects.equals("productIds", cookie.getName())) {
//把productIds中的productId提取出来
String[] productIds = cookie.getValue().split("%2C");
StringBuilder stringBuilder = new StringBuilder();
for (String cookieId : productIds) {
if (cookieId.equals(productId)) {
continue;
}
//把剩下的id要回来
stringBuilder.append(cookieId + "%2C");
}
//为cookie设置新的值
cookie.setValue(stringBuilder.toString());
//调用同步cookie的方法
syncCookie("/detail","removeCookie.do",stringBuilder.toString());
resp.addCookie(cookie);
}
}
//重定向
resp.sendRedirect("/browse/list.do");
}
} else if (Objects.equals("/browse/setCookie.do", req.getServletPath())) {
//为其它应用传来的setCookie请求
String cookies = req.getParameter("cookies");
//把cookie写入response作用域中
resp.addCookie(new Cookie("productIds", cookies));
resp.setCharacterEncoding("UTF-8");
resp.setContentType("application/text;charset=utf-8");
//写入输出流
PrintWriter out = null;
try {
out = resp.getWriter();
out.write("ok");
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != out) {
out.close();
}
}
}
}
}119
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