流程是获取验证码，返回的cookie用存到session中，再模拟登录的时候，帐号+密码+cookie+验证码带过去登录。但是返回的json总是提示没有输入验证码，估计是网站识别不了带过去的cookie。因为我用模拟登录的时候，在手动输入cookie中持有的sessionid类似标识信息过去时，在正确时能登录。在错误时也是提示没有输入验证码。   

请问为什么会出现这种情况，我前面保存的cookie为什么在后面带过去的时候不能用了？困扰许久，请帮忙！谢谢谢谢！

首先 获取验证码的代码

public static Map<String, Object> getCheckImg(String checkUrl, Map<String, String> data, Map<String, String> cookies, boolean tls, boolean conType, boolean redirects) {
try {
Map<String, Object> map = new HashMap<String, Object>();
System.out.println("checkUrl"+checkUrl+"-----data:"+data);
Response res = installConnection(Jsoup.connect(checkUrl), data, cookies, tls, conType, redirects).method(Method.GET).timeout(20000).execute();
InputStream in_nocode = new ByteArrayInputStream(res.bodyAsBytes());
System.out.println("放进去的cookie"+res.cookies());
map.put("cookie", res.cookies());
map.put("imgIO", ImageIO.read(in_nocode));
return map;
} catch (IOException e) {
loger.error("获取验证码失败！" + e);
}
return null;
}

----------------------------------封装jsoup的connection代码

private static Connection installConnection(Connection con, Map<String, String> data, Map<String, String> cookies, boolean tls, boolean conType, boolean redirects) {
if (tls) {
con.validateTLSCertificates(false);
}
if (conType) {
con.ignoreContentType(true);
}
if (redirects) {
con.followRedirects(false);
}
if (cookies != null) {
con.cookies(cookies);
}
if (data != null) {
con.data(data);
}
return con;
}

-------进行登录的代码

private boolean crawlJobcn(int userAccountId, int userClass, String time, HashMap<String, String> propertiesMap) throws IOException {
　　Map<String, String> map = new HashMap<String, String>();
　　Map<String, String> checkCooikis = (Map<String, String>) 　　request.getSession().getAttribute("checkCookie");
　　System.out.println(checkCooikis);
　　map.put(propertiesMap.get("zhuobo_CheckCode"), validateCode);
　　map.put(propertiesMap.get("zhuobo_Login_Name"), loginName);
　　map.put(propertiesMap.get("zhuobo_Login_Pwd"), loginPwd);
　　Response responseJsoup = CrawlUtils.login(map, checkCooikis, 　　propertiesMap.get("zhuobo_Login_Url"), Method.POST, true, true, false);

｝

public static Response login(Map<String, String> data, Map<String, String> cookies, String loginUrl, Method method, boolean tls, boolean conType, boolean redirects) {
try {
System.out.println("带过去的cookie:"+cookies+",data:"+data+",loginUrl:"+loginUrl+",tls:"+tls);
Response response = installConnection(Jsoup.connect(loginUrl), data, cookies, tls, conType, redirects).method(method).timeout(20000).execute();
if (response.statusCode() == 200) {
return response;
}
} catch (Exception e) {
loger.error("抓取简历登陆时,网络存在问题,请检查网络！" + e);
}
return null;
}