开发笔记:Java是如何读取和写入浏览器Cookies的

/*
* 该类可以从浏览器请求中提取出COOKIEs并进行对cookis的相关操作
*
*/
public class COOKIEsUtil extends BaseController {

/**
* 根据名字获取COOKIE
*
* @param request
* @param name
* COOKIE名字
* @return
*/
public static COOKIE getCOOKIEByName(HttpServletRequest request, String name) {
Map COOKIEMap = ReadCOOKIEMap(request);
if (COOKIEMap.containsKey(name)) {
COOKIE COOKIE = (COOKIE) COOKIEMap.get(name);
return COOKIE;
} else {
return null;
}
}
/**
* 将COOKIE封装到Map里面
*
* @param request
* @return
*/
private static Map ReadCOOKIEMap(HttpServletRequest request) {
Map COOKIEMap = new HashMap();
COOKIE[] COOKIEs = request.getCOOKIEs();
if (null != COOKIEs) {
for (COOKIE COOKIE : COOKIEs) {
COOKIEMap.put(COOKIE.getName(), COOKIE);
}
}
return COOKIEMap;
}
/**
* 保存COOKIEs
*
* @param response
* servlet请求
* @param value
* 保存值
* @author jxf
*/
public static HttpServletResponse setCOOKIE(HttpServletResponse response, String name, String value,int time) {
// new一个COOKIE对象,键值对为参数
COOKIE COOKIE = new COOKIE(name, value);
// tomcat下多应用共享
COOKIE.setPath("/");
// 如果COOKIE的值中含有中文时，需要对COOKIE进行编码，不然会产生乱码
try {
URLEncoder.encode(value, "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
COOKIE.setMaxAge(time);
// 将COOKIE添加到Response中,使之生效
response.addCOOKIE(COOKIE); // addCOOKIE后，如果已经存在相同名字的COOKIE，则最新的覆盖旧的COOKIE
return response;
}

1 /**
2 *

删除无效COOKIE