Httponly cookie 是一种 cookie 安全解决方案。
在支持httponly cookie的浏览器（IE6+、FF3.0+）中，如果cookie中设置了“httponly”属性，则JavaScript脚本将无法读取cookie信息，可以有效防止XSS攻击，让网站应用更安全。
但是J2EE4、J2EE5 cookie不提供设置httponly属性的方法，所以如果需要设置httponly属性需要自己处理。
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
public class CookieUtil {
public static void addCookie(HttpServletResponse response, Cookie cookie, boolean isHttpOnly) {
String name = cookie.getName();//Cookie name
String value = cookie.getValue();//Cookie value
int maxAge = cookie.getMaxAge();//Maximum survival time (milliseconds, 0 representative deletion, -1 represents the same as the browser session)
String path = cookie.getPath();//path
String domain = cookie.getDomain();//area
boolean isSecure = cookie.getSecure();//Is there a security protocol?
StringBuilder buffer = new StringBuilder();
buffer.append(name).append("=").append(value).append(";");
if (maxAge == 0) {
buffer.append("Expires=Thu Jan 01 08:00:00 CST 1970;");
} else if (maxAge > 0) {
buffer.append("Max-Age=").append(maxAge).append(";");
}
if (domain != null) {
buffer.append("domain=").append(domain).append(";");
}
if (path != null) {
buffer.append("path=").append(path).append(";");
}
if (isSecure) {
buffer.append("secure;");
}
if (isHttpOnly) {
buffer.append("HTTPOnly;");
}
response.addHeader("Set-Cookie", buffer.toString());
}
}值得一提的是，Java Ee 6.0中的cookie已经设置了httponly，所以如果兼容Java EE 6.0兼容的容器（例如Tomcat 7），可以使用cookie.sethttponly设置HTTPONLY：
cookie.setHttpOnly(true);
Java HttpCookie 类的setHttpOnly(Boolean httpOnly) 方法用于指示cookie 是否可以被认为是HTTPOnly。如果设置为 true，则 cookie 不能被 JavaScript 等脚本引擎访问。
句法
public void setHttpOnly(boolean httpOnly)
范围
上述方法只需要一个参数：
httpOnly - 如果 cookie 仅是 HTTP，则表示 true，这意味着它作为 HTTP 请求的一部分可见。
返回
不适用
示例 1
import java.net.HttpCookie;
public class JavaHttpCookieSetHttpOnlyExample1 {
public static void main(String[] args) {
HttpCookie cookie = new HttpCookie("Student", "1");
// Indicate whether the cookie can be considered as HTTP Only or not.
cookie.setHttpOnly(true);
// Return true if the cookie is considered as HTTPOnly.
System.out.println("Check whether the cookie is HTTPOnly: "+cookie.isHttpOnly());
}
}
输出：
Check whether the cookie is HTTPOnly: true
示例 2
import java.net.HttpCookie;
public class JavaHttpCookieSetHttpOnlyExample2 {
public static void main(String[] args) {
HttpCookie cookie = new HttpCookie("Student", "1");
// Indicate whether the cookie can be considered as HTTP Only or not.
cookie.setHttpOnly(false);
// Return false if the cookie is not considered as HTTPOnly.
System.out.println("Check whether the cookie is HTTPOnly: "+cookie.isHttpOnly());
}
}
输出：
Check whether the cookie is HTTPOnly: false
示例 3
import java.net.HttpCookie;
public class JavaHttpCookieSetHttpOnlyExample3 {
public static void main(String[] args) {
HttpCookie cookie1 = new HttpCookie("Student1", "1");
HttpCookie cookie2 = new HttpCookie("Student2", "2");
//Indicate whether the cookie can be considered as HTTP Only or not.
cookie1.setHttpOnly(true);
cookie2.setHttpOnly(false);
System.out.println("Check whether the first cookie is HTTPOnly:"+cookie1.isHttpOnly());
System.out.println("Check whether the second cookie is HTTPOnly:"+cookie2.isHttpOnly());
}
}
输出：
Check whether the first cookie is HTTPOnly:true
Check whether the second cookie is HTTPOnly:false
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